Mechanical Hardware

For the leakage in the pilot-operated pressure control valves less than 2drops /min, Howard from Accupress in Canada, contacted more than 30 Chinese hydraulic valve manufacturers. Only AAK pilot-operated pressure control valves met the standard and replaced his local factory in the United States. Last year, the hydraulic shearing machine they listed sold well. The boss decided to mass produce it in Suzhou, China. However, the pilot-operated pressure control valve to be used in the hydraulic shearing machine was originally purchased in the United States, and the internal leakage is less than 2drops / min. If the pilot-operated pressure control valve is purchased from China, it will save money and time. While contacting some old suppliers, Howard is also looking for new manufacturers of pilot-operated pressure control valves. We also received Howard's inquiry. The email subject is: can you supply pilot- operated pressure control valves with internal leakage less than 2drops / min for our Suzhou factory? We thought it was a domestic purchase, so we politely refused. Until Howard's second email told us why he wanted to ship to Suzhou, and he contacted more than 30 Chinese hydraulic valve manufacturers, only two of them replied that they could try to make samples of pilot-operated pressure control valves with internal leakage less than 2drops/min, and there was no any reply from the other manufacturers. Howard asked if AAK pilot-operated pressure control valves could meet American factory standards? If not, the sample is meaningless. I told him directly that AAK had tested samples of pilot-operated pressure control valves with internal leakage less than 2drops/min for a German company some time ago. The pilot- operated pressure control valves can be refunded in full if our samples do not meet the standard. One month later, 30 pilot operated pressure control valves were sent to Accupress's Suzhou plant. Four weeks later, Howard sent an email saying that their engineers tested the pilot operated pressure control valves of AAK and two other manufacturers, and only AAK samples met the standard. Some parameters were higher than those of the original American factory, and those of the other two manufacturers did not meet the standards. In particular, AAK pilot operated pressure control valves caught up with and surpassed his American factory, which surprised him. AAK pilot operated pressure control valves can meet such requirements because of two reasons: 1、For the pilot operated pressure control valves, the matching clearance accuracy between the valve spool and the valve body directly determines the internal leakage of the whole valve. AAK has German Nagel precision honing machine. After honing, the dimensional accuracy of the cone plating of the valve spool and valve body of the pilot operated pressure control valve is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04μm, which can not be achieved by most of hydraulic valve manufacturers. 2、After assembly, AAK uses a special air pressure tester to detect the leakage of each pilot operated pressure control valve. Within the set pressure and time range, AAK judges the internal leakage according to the number of bubbles. However, most factories use the oil pressure test method. As I have known that there may be no more than three factories that can use special air pressure test. Howard told me privately that his boss appreciated his quick finding a supplier who could replace the pilot operated pressure control valves produced in American factory. Now his purchasing authority has been improved. AAK pilot operated pressure control valves, the internal leakage is less than 2drops /min. You are welcome to have a small try! https://www.aakindustry.com/info-detai , l/pressure-control-valves-aak191

5 years ago, engineer Mr. Liu worked at a hydraulic manifold manufacturer for 3 years before going to Japan for further studies, and then worked in SUN's China office for 2 years. Last week, engineer Mr. Liu approached me and wanted to start a new hydraulic manifold manufacturer. I know his technical skills can support a hydraulic manifold manufacturer, but a new hydraulic manifold manufacturer should not only focus on technology, but also consider the direction, business model, team, and product positioning of the hydraulic manifold manufacturer. I told engineer Mr.Liu that the choice was wrong and the effort was in vain. The direction is wrong, the harder you work, the more helpless you become. You don't necessarily have to focus on hydraulic manifolds, you can also make hydraulic valves and hydraulic motors. On the road to entrepreneurship, even a tech giant may not have smooth sailing. I shared how hydraulic manifold manufacturer AAK came step by step back then. The 1st level of AAK is to determine the direction. AAK has chosen hydraulic cartridge valves, which are the core components of hydraulic manifolds. In fact, most hydraulic manifold manufacturers start by producing manifold blocks, and then the core components - hydraulic cartidge valves are purchased externally. The 2nd level of AAK is creating models. The most important point: Who do you plan to do business with? Find out who your target customers are and who your competitors are. AAK is positioned as a customer group with quality standards and a focus on online platforms. By leveraging AAK's strengths and characteristics, we aim to establish customer trust online. At that time, most hydraulic manifold manufacturers only engaged in offline business, and domestic business relied on relationships or low price competition. The 3rd level of AAK is team building. All careers are created by humans. Initially, hydraulic manifold manufacturer AAK established a team based on 4 conditions: mutual trust, complementary capabilities, clear division of labor, and financial support. The 4th level of AAK is polishing the product. At the beginning, we treated SUN and HydarForce as benchmark objects, bought many of their hydraulic cartridge valves to disassemble, extracted each part of the hydraulic cartridge valve, materials used, technology, precision requirements, etc., and specified a production process sheet that meets the requirements of hydraulic manifold manufacturer AAK. Most hydraulic manifold manufacturers only focus on the surrounding factories, focusing on how to save costs and obtain orders. The 5th level of AAK is trust building. We focus on the online to tell customers what are the products of hydraulic manifold manufacturer AAK? What's the difference? How can we see this? How to make it easy for customers to see and remember you online. The 6th level of AAK is to give benefits. Most customers pay for the benefits, and AAK spreads online to attract new customers, while the core is how to bring value to existing customers. Most hydraulic manifold manufacturers are attracting new users while losing old ones, and this is the most taboo of hydraulic manifold manufacturer AAK. The 7th level of AAK is to lead a team. When the horn blows, the troops must keep up. For example, can AAK produce products that most hydraulic manifold manufacturers do not want to produce? For example, can AAK handle products that most hydraulic manifold manufacturers cannot handle? The basic qualities for doing business are reliability and turning "impossible" into "possible". Entrepreneurship is about achieving definite results in an uncertain environment. The journey of hydraulic manifold manufacturer AAK is not easy, difficult, and only we know it ourselves. Tired, tired, tired, still endure. AAK HYDRAULIC VALVES (747) 2023-12-30 https://www.aakindustry.com/info , -detail/hydraulic-manifold-manufacturers- aak74 , 7

Davis is an old customer from Germany. We met 3 years ago and he purchases hydraulic valves from AAK every year. In the second half of last year, Davis suddenly asked me: can AAK hydraulic valve blocks be as stable as the hydraulic valves? I feel that there is a problem with the hydraulic valve blocks he purchased from other manufacturers. According to the hydraulic valve block drawings sent by Davis, AAK engineers found that this hydraulic valve block is indeed difficult after review. In particular, the oil passage width of the hydraulic valve block is more than 2 times smaller than that of the conventional one, and some valve spool holes are multi segmented structure, which has high requirements for hydraulic valve block processing and iron filings cleaning. I told Davis that you will see the results in 40 days. One month later, AAK sent 5 samples of hydraulic valve blocks as scheduled. Strangely, 2 months later, there was no news from Davis about this hydraulic valve block. After a lapse of more than half a year, that is, last week, Davis sent an email to purchase 1,000 hydraulic valve blocks at one time. The stability of the hydraulic valve blocks must not be lower than that of the samples sent half a year ago. More than half a year has passed since proofing, suddenly, an order of such a big quantity for hydraulic valve blocks have been placed, which makes us happy and surprised. Davis informed that the hydraulic valve block samples provided by AAK have been tested internally. Half a year later, their engineers thought that the hydraulic valve block samples provided by AAK had passed the test, so they placed a large order of hydraulic valve blocks today. In fact, this is not their new order, but moved from the original hydraulic valve block manufacturer to AAK. The original manufacturer started shipping 2 years ago, but during these 2 years, users always complain that the burr of the hydraulic valve blocks pollutes the oil. Sometimes the burr of the hydraulic valve blocks causes the hydraulic valves to jam, which makes their after-sales personnel very embarrassed. They also tried to ask more than 20 new manufacturers of hydraulic valve blocks for solution, but none of them can guarantee 100% free of iron filings. They can only continue to purchase this hydraulic valve block from the original manufacturer. The boss was very unhappy and gave Davis half a year. If the burr problem of the hydraulic valve blocks cannot be completely solved, they can only purchase domestically from Germany in the future, even if the price is more than 60% expensive. AAK hydraulic valve blocks have withstood the test for half a year and Davis also completed the task given by the boss. Davis was also surprised. Later, he asked me: Why can't the original manufacturer solve it for 2 years and more than 20 manufacturers can't guarantee it 100%. How can AAK hydraulic valve blocks be 100% burr free? 1. AAK adopts German Alma ultrasonic, which is a sharp deburring tool. Its instantaneous high pressure can effectively remove the burr of the inner hole of the hydraulic valve blocks. 2. Then use the industrial endoscope to check all the hydraulic valve block channels again to ensure that there are no dead corners. 3. Then observe the inner hole of each hydraulic valve block with a high magnification microscope to ensure that it is 100% free of burrs and other impurities before packaging. AAK hydraulic valve blocks have unique skills in deburring. You are welcome to give it a try! https://www.aakindustry.com/info-detai , l/hydraulic-valve-blocks-aak190

Alek is from Poland and was annoyed when he first purchased hydraulic cartridge valves from Ningbo. In the second half of last year, they tested a hydraulic lift that used a hydraulic cartridge counterbalance valve purchased from a hydraulic cartridge valve manufacturer in Ningbo. When the load was lowered, the lift vibrated at low frequencies and the system was unstable. The customer was not satisfied with the prototype and requested that the hidden danger be resolved within 2 months, otherwise the order would only be cancelled. The original hydraulic cartridge counterbalance valve manufacturer reported that this function is a standard model benchmarking SUN Hydraulics and cannot be improved. Alek contacted other hydraulic cartridge valve manufacturers in Ningbo, but after a week, there was no result. Alek was upset. Alek contacted AAK through the introduction of peers. In my impression, AAK seems to have no Polish customers. I joked that your name Alek is very close to my company's name AAK. Perhaps it was God's arrangement to bring us together. According to his introduction, it seems that the SUN standard part of hydraulic cartridge counterbalance valve does not match his equipment system. Due to the inconvenience of changing the system, it is only possible to customize the hydraulic cartridge counterbalance valve to match the system. According to the schematic diagram of the hydraulic system provided by him, the peak pressure generated by load impact is relatively high. If the hydraulic cartridge counterbalance valve is buffered in a timely manner, it should be able to alleviate the vibration. After 50 days, AAK sent 10 samples of hydraulic cartridge counterbalance valves. 3 weeks later, Alek informed me that their lift prototype had been approved by the customer and asked me to wait for further news. 3 months later, yesterday, Alek sent us a PO for 300 hydraulic cartridge counterbalance valve. Their engineers are satisfied with AAK hydraulic cartridge counterbalance valve, the speed at which the lift loads are lowered, is well controlled, and the system is stable. AAK hydraulic cartridge counterbalance valve has no sudden change in the flow area, and can quickly and timely cushion the pressure peak generated by load impact, making the lift safer and energy-saving. 1. The valve seat of the hydraulic cartridge counterbalance valve is provided with a transversely penetrating through-hole, forming a valve seat connecting hole section, a valve seat connecting hole section, a valve seat transition hole section, and a valve seat sliding hole section. The apertures of the 4 hole sections decrease in turn, with a first oil port of the connecting section on the side wall of the valve seat, and a second oil port at the right end of the through-hole of the valve seat. 2. The valve sleeve of the hydraulic cartridge counterbalance valve is provided with a transverse through-hole to form a main hole section of the valve sleeve and a reduced diameter hole section of the valve sleeve. The outer wall of the valve sleeve is provided with a valve sleeve through-flow groove that communicates with the fourth oil port. 3. The valve spool is located in the main hole section of the valve sleeve and can be moved left and right to match the 2 valve spool reducing sections in the valve sleeve reducing hole section. The left side of the second valve spool reducing section is provided with a flange for opening and closing the valve seat transition hole section, and a valve spool throttle hole is located on the right side of the flange. When the pressure oil from the fourth oil port enters the valve spool of the first control chamber, the valve spool moves to the left, gradually exposing each radial orifice, and the overflow area can be reduced and increased. The hydraulic cartridge counterbalance valve can timely cushion the pressure peak generated by load impact. AAK hydraulic cartridge counterbalance valve, has a function that SUN standard part do not have, you can also try it! https://www.aakindustry.com/info-detail , /cartridge-counterbalance-valves-aak540

My friend, a hydraulic cartridge valve manufacturer, his daughter got married today, and invited me to the wedding banquet. Of course, I should bring a red envelope to congratulate him. This friend has been working as a hydraulic cartridge valve manufacturer for 20 years. We are both teachers and friends, and when encountering problems with hydraulic cartridge valves, we consult with each other, unlike other hydraulic cartridge valve manufacturers who without any contact with each other. Seeing his son-in-law, my heart sank. Apart from being handsome, there was more lack of confidence. Later on, I learned that this young man came from a rural area in the central region of China, with both parents being farmers and a relatively poor family. My friend's family, after all, has been a hydraulic cartridge valve manufacturer for more than 20 years and is considered wealthy. They only have one daughter. The marriage in China is more about "matching families". Marrying a family without money really worries me about my friend's daughter. The old Chinese saying goes: When getting married, if you are favored by wealthy people, you must marry the wealthy instead of the poor. Rich people have many choices but still want to be with you because they really love you, while poor people are with you because they have no choice. Although I don't quite agree with this paragraph, I am powerless to refute it. Younger people may think that this viewpoint is too secular and snobbish. When they get older, they may understand, but it's too late. Love is the romance of two strong people, not the bitter hatred of two weak people. I advise all girls that it is better not to marry than to marry a poor person. This is also established in the hydraulic cartridge valve manufacturer industry. I advise all hydraulic cartridge valve manufacturers that it is better to choose not to accept orders than to ship to poor customers. In today's society, if money is not in place, no matter how many advantages, they are also disadvantages. If money is in place, no matter how many drawbacks, they can be ignored. In school, if you are a top student, all other shortcomings can be ignored. If you are a bottom student, no matter how outstanding you are in other aspects, it is useless. Maugham also said: When you marry a poor person, you will be responsible for his ignorance, debts, disasters, and all his misfortunes, wrong thoughts, as well as the ignorance, laziness, and chaos of his family. You will be responsible for it, and with what? Take responsibility for the cost of your life, wealth, career, and future. Marrying a poor person requires personal dedication and the intention to never turn around. Women who marry poor families will suffer the hardships and hardships of life. Both physically and mentally, you will be under tremendous pressure, thinking all day long about how to live a good life, saving money for children to study, unwilling to buy new clothes for yourself, and watching others' faces to work. The girl who originally loved beauty and gentleness was forced by life to become a tough woman. Marriage is not a child's play. When choosing a marriage partner, it is important to keep eyes open. Marriage cannot only focus on money, but it is absolutely not workable without money. The business of hydraulic cartridge valves is not a game. When choosing customers, it should be cautious. Hydraulic cartridge valve manufacturers cannot only focus on money, but it is definitely not workable not to talk about money. Every woman has an opportunity to make herself happy, and this opportunity depends on herself to strive for. Every hydraulic cartridge valve manufacturer has an opportunity to make money, and it is up to them to seize this opportunity. Hydraulic cartridge valve manufacturer AAK, never makes small moves under the table, targets customers who are suitable match, and only accept orders from customers who can afford it. AAK HYDRAULIC VALVES (632) 2023-07-21 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak632

German customer David has been purchased hydraulic relief valves in Ningbo in a same factory. At the beginning of last year, David purchased a batch of hydraulic relief valves for crane system in AAK because the original supplier was not able to meet the delivery. He sent an email last week saying: "with AAK hydraulic relief valves, the stability is 8% higher than that of the original supplier, and there is almost no external leakage". This surprised him. The use experience of AAK hydraulic relief valves has benchmarked with their previous local hydraulic relief valve manufacturers in Germany. The vast majority of hydraulic valve bodies are made of nodular iron, vermicular iron and gray iron and cast with resin sand as the molding medium. Therefore, there is sticky sand in the casting, which is easy to pollute the oil system and block the valve and filter, which is the key factor affecting the stability of hydraulic relief valves. Most of the common sand cleaning methods of hydraulic relief valves used in the industry are shot blasting and electrochemical sand cleaning, all of which have limitations. 1. Shot blasting can not completely remove the sticking sand from the valve hole with complex structure and small oil passage, which is easy to affect the tightness and product accuracy, and is not conducive to the stability of the hydraulic relief valves. 2. Electrochemical sand cleaning can relatively remove the sticky sand in the narrow oil passage, but it has high energy consumption, high operation intensity of workers, easy to have human errors, can not completely remove the sticky sand, and is not conducive to the stability of the hydraulic relief valves. Improving the quality of hydraulic parts processing process, improving the cleanliness level and ensuring the stability of hydraulic relief valves has always been the hard index of AAK hydraulic relief valves. Auxiliary processing of hydraulic parts mainly includes: sand cleaning of valve body, deburring or residue treatment of parts and cleaning of hydraulic parts. How does AAK do the sand cleaning of hydraulic relief valves? AAK technical team has continuously improved the sand cleaning process of hydraulic relief valves after years of technical improvement. For the sand cleaning of small complex castings, AAK has its own unique AAK sand cleaning 5 methods, namely: artificial aging - Pickling - rinsing - rust prevention - ultrasonic cleaning. Artificial aging is used to reduce the binding force between the casting and sand, acid pickling is used to remove the oxide skin at the joint between the sand and the casting to peel the sand from the casting, and then the explosion of compressed air during ultrasonic cleaning is used to peel off the sand, so as to achieve the purpose of sand cleaning. AAK has its own unique advantages of AAK sand cleaning 5 methods: (1) it is less affected by the casting structure; (2) it is carried out before machining and does not affect the arrangement of machining process; (3) although it has a certain impact on the environment, antifogging agent is added during pickling to reduce the impact. At the same time, corresponding corrosion inhibitor is added during pickling, and rust prevention treatment is carried out immediately after rinsing to ensure the stability of hydraulic relief valves. This is also the reason why the stability of AAK hydraulic relief valves is more than 8% higher than that of other manufacturers. The stability of AAK hydraulic relief valves comes from AAK unique and efficient sand cleaning methods. You are welcome to try an order! https://www.aakindustry.com/info-det , ail/hydraulic-relief-valves-aak189

Philip comes from a hydraulic equipment company in Italy. He has purchased hydraulic pressure reducing valves in China for several years. He is also an old customer of AAK. At the beginning of last month, Philip emailed that there was a problem with the hydraulic pressure reducing valves he purchased elsewhere at the beginning of last year, and the company had to pay a lot of money after sales. The boss had big disagree opinion on him. After further communication, we learned that in order to reduce the purchase cost by 17%, he did not choose AAK and purchased hydraulic pressure reducing valves from another factory. The crane sold by Philip’s company suddenly increased the load of variable displacement pump during operation, resulting in the control failure of the whole hydraulic system. Under normal circumstances, the hydraulic pressure reducing valve of the variable displacement pump as the emergency safety valve is in the normally closed state. This time, the pressure of the variable displacement pump cannot be released due to the jamming of the hydraulic pressure reducing valves, resulting in the collapse of the system. The customer requests to replace the hydraulic pressure reducing valves on the equipment and compensate the cost of work delay on the construction site. Philip asked the original manufacturer to replace the hydraulic pressure reducing valves. The manufacturer said that the hydraulic pressure reducing valves have been used for more than half a year. The problem of the valve spool sticking is caused by sundries in the hydraulic oil used by the user. At present, this model of hydraulic pressure reducing valves is not in stock, and it will take at least more than a month to re produce. I asked Philip to send me the model and parameters of this style of hydraulic pressure reducing valves. After analysis, AAK engineers found that the hydraulic pressure reducing valves needed by Philip was exactly the same as that ordered by one of our Russian customers last time. We have it in stock. The next day, AAK sent 20 hydraulic pressure reducing valves to Philip by air express. After receiving them, he asked the after-sales engineer to replace it on site. As a result, everything was normal and the crane could operate smoothly. A week later, Philip sent an email saying that thanks to AAK hydraulic pressure reducing valves, which saved the company a compensation. The boss also appreciated AAK for its help and suggested Philip list AAK as their preferred supplier of hydraulic pressure reducing valves. The price of AAK hydraulic pressure reducing valves may be a little higher than that of its counterparts in Ningbo, but you have no worries when using it. AAK knows that the hydraulic pressure reducing valve is the soul of this crane. Therefore, AAK controls the production quality of the hydraulic pressure reducing valves strictly, so that customers can buy it at ease and use it at ease. AAK hydraulic pressure reducing valves have two absolute advantages and has already surpassed its domestic counterparts. 1. AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and avoids valve spool sticking and other faults. 2. The independent professional R & D team, combined with unique R & D technology, has realized the personalized customization demand of hydraulic pressure reducing valves, which can not be achieved by 95% of domestic peers. Peter told me privately that his boss asked him to send samples of the other hydraulic pressure reducing valves previously purchased to AAK for quotation. Even if the price is a little expensive, they should also choose AAK hydraulic valves which are more stable. They not only admire AAK's professional analysis ability, but also AAK's ability to solve difficulties for customers in time. AAK hydraulic pressure reducing valves, professional and whole-hearted, help customers solve problems in time. You are welcome to have a small try. https://www.aakindustry.com/info-detail/hy , draulic-pressure-reducing-valves- aak188

A while ago, our Russian client Erop said that they have sent me a hydraulic manifold block sample, and need the hydraulic manifold manufacturer AAK to check if we can achieve valve hole accuracy within 3μm. I replied that the shipping cost is high, just send the hydraulic valve block drawing. However, Erop said that he had checked with several hydraulic manifold manufacturers and they all reported that the oil circuit holes were complex and the drawings were too complex, samples were needed. However, Erop was not willing to send samples to these hydraulic manifold manufacturers. After further communication, it was found that a colleague of Erop tested this manifold block from another hydraulic manifold manufacturer. The accuracy of the valve hole is unstable, and some have exceeded 5μm. Now his colleague can't get it done with that hydraulic manifold manufacturer and can only seek help from Erop. The accuracy of the manifold block does not meet the standard, either the machining center cannot handle the accuracy, or the preparation work before processing is not done meticulously. This is a detail issue that is easily overlooked by most hydraulic manifold manufacturers. 5 years ago, hydraulic manifold manufacturer AAK suffered losses in this area. Our technical team optimized the production process and established a dedicated tool setting process before processing, with dedicated personnel responsible for it. Erop told me that the machining center of the original hydraulic manifold manufacturer can meet the accuracy requirements. I estimate that their technicians did not have any details about the tool alignment before processing, so I told Erop my guess. Erop is very interested in knowing how hydraulic manifold manufacturer AAK does it in this detail. For hydraulic manifold blocks with high precision and complex oil circuits, relying solely on machining centers will have potential problems. It must be assisted with experienced technicians. The Taiwan CNC machining center of hydraulic manifold manufacturer AAK has a stable transmission system and timely feedback system, which lays the foundation for precision machining, especially the structure of 6-disc bearings, which guarantees accuracy and stability. At the same time, its NSK screw also helps with processing stability. Before processing, hydraulic manifold manufacturer AAK has specialized technicians to position the tool. Firstly, manually remote control the tool to the valve hole, then locate the specific position of each tool. Based on the input system position data, the system will provide timely feedback to guide the process without worrying about deviations. Finally, tighten each manifold block to be processed. This simple 3-step process can execute the tool alignment process without error, but most hydraulic manifold manufacturers may find it troublesome and overlook this detail. AAK hydraulic manifold manufacturer in Ningbo China, with details before processing, with an accuracy of within 3μm, you can also give it a try! AAK HYDRAULIC VALVES (746) 2023-12-28 https://www.aakindustry.com/info , -detail/hydraulic-manifold-manufacturers- aak74 , 6

The local manufacturer who has cooperated for 5 years can't meet the precision requirements of the hydraulic cartridge pressure control valve spool, and the defective rate is up to 70%. They gave up 2 weeks after receiving the order. After AAK took over, 3 targeted processing skills were used. The roundness of the hydraulic cartridge pressure control valve spool accuracy could be less than 0.0005, the finish less than Ra0.02, and the percent of pass was more than 95%. Nabulung was completely relaxed after receiving AAK samples of hydraulic cartridge pressure control valves. Nabulung is from Egypt. In the first half of this year, their engineer asked him to purchase 8 hydraulic cartridge pressure control valve samples for the development of new equipment. The roundness of the hydraulic cartridge pressure control valve spool shall be less than 0.0005 and the finish shall be less than Ra0.02. Nabulung realized that the spool was very difficult. He chose a local hydraulic cartridge valve manufacturer who had cooperated with him for 5 years to make samples. The manufacturer started to try samples. 2 weeks later, the manufacturer gave up. The defective rate of the spool was as high as 70%, and the accuracy was not stable. Nabulung found AAK and sent us an email: I noticed the advantages and characteristic processing technology of AAK in the production of valve spools. Can AAK sample the roundness of valve spool less than 0.0005 and the finish less than Ra0.02? After communication, we learned the high defective rate of the original manufacturer of the hydraulic cartridge pressure control valve. According to the drawings provided by Nabulung, the requirements for this spool are indeed very individual, and the conventional production process does not work, but AAK has some experience in spool production and can adjust the process accordingly. After 36 days, AAK sent 8 samples of hydraulic cartridge pressure control valves. 37 days later, Nabulung emailed us that their engineer was very satisfied with AAK hydraulic cartridge pressure control valve samples, especially the stable accuracy of the valve spool. He was worried for nearly 2 months, and finally he could put it down. The roundness of AAK hydraulic cartridge pressure control valve spool accuracy can be less than 0.0005, and the smoothness is less than Ra0.02, which mainly comes from 3 unique processing methods: 1. Roughly turn the profile of the valve spool, leaving a margin of 0.15mm, slotting, drilling, and straightening with deflection instrument to make the bending less than 0.02N/m. 2. The valve spool shall be subject to heat treatment and rough grinding after the hardness reaches HRC65. The center hole is used for high-precision cone hole positioning, and then the ejector pin holes at both ends of the valve spool are honed to make the roundness of the ejector pin hole less than 0.0005, the finish is less than Ra0.02. 3. Cryogenic treatment, freezing treatment at - 65°C - 75°C for 2 - 2.5 hours, the residual austenite in the valve spool will be transformed into martensite, and the toughness and wear resistance of the valve spool will be improved by at least 2 times. Most manufacturers of hydraulic cartridge pressure control valves ignore this link. AAK hydraulic cartridge pressure control valve, has unique skills to process the valve spool, you can also try a small order! https://www.aakindustry.com/info-det , ail/pressure-control-valves-aak463

AAK hydraulic valve block, from a five axis CNC machining center, is milled with a thread milling cutter, completely replacing the traditional radial drilling machine processed with a formed tap, and the thread surface roughness value is Ra1.6μm. The traditional Ra is at 12.5μm. Ra alone has increased sevenfold. Archie purchased AAK hydraulic valve blocks, which not only stopped losing more than 30,000 dollars, but also made an additional profit of more than 10%. For the hydraulic valve block with conical pipe thread, the pipe thread cannot completely seal oil, which is an industry problem. The vast majority of hydraulic valve block manufacturers use traditional radial drilling machines and formed taps for processing. The surface roughness of their threads is a "mine", especially the processing of offset holes, which is a hot potato. Archie, from Australia, purchased most of his hydraulic valve blocks from India, but these hydraulic valve block manufacturers use radial drilling machines for processing. Archie did not know that this traditional process cannot afford to process tapered pipe threads. The order of more than 30,000 dollars in his hand had been involved for 4 months, but the sample of the hydraulic valve block had not passed the standard. The customer was not satisfied. Archie wanted to give up the order, but he was very depressed because of his high profit and unwilling to lose the customer. Archie occasionally noticed many customer cases of AAK hydraulic valve blocks through B2B. He sent an email to ask if it is possible to produce a special hydraulic valve block for him. After AAK technical team refined the drawings, the whole processing process was implemented and had a foundation. I told him that the bottom diameter of the oil hole and valve hole of this hydraulic valve block is large, and most of them are offset holes. At the same time, the taper pipe thread of the oil hole is large, and the oil pressure under working conditions is large, so if accuracy can not be guaranteed, all efforts will be wasted. Archie may realize that when come to the point, and asked us to make samples. After 25 days, 5 hydraulic valve block samples were sent out. 3 weeks later, Archie informed us that the customer had approved the manufacturing quality of AAK hydraulic valve blocks, and that there was no tooth breakage on the thread, especially the thread surface roughness value is Ra1.6μm, the customer was amazed, and the whole sealing performance of the hydraulic valve block was also recognized after the pressure test. 6 years ago, AAK hydraulic valve block was processed with a five axis CNC machining center, instead of the traditional radial drilling machine. A thread milling cutter is used to program for milling. At the same time, according to the pipe thread size, the spiral interpolation milling can obtain stable thread quality, and the thread surface roughness can reach Ra1.6μm. The hidden trouble that the pipe thread cannot seal oil is completely solved. A few days ago, Archie told me privately that AAK hydraulic valve blocks not only saved the customer for him, but also increased his extra profit by more than 10%. The boss was very happy and his authority was also great. AAK hydraulic valve blocks, good at high precision, you are welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-valve-blocks-aak397

HIGINSON company plans to develop a new plunger hydraulic cylinder, which needs to purchase the supporting hydraulic directional control valves. Helen, who had just joined the company, stumbled when purchasing the hydraulic directional control valves. Helen has no hydraulic valve supplier and can only purchase from the original hydraulic valve manufacturer of the company. Half a month later, the engineer and technician of the company installed the hydraulic directional control valves purchased by Helen for commissioning, and the plunger hydraulic cylinder dropped intermittently with vibration and noise. The technician pointed out that the hydraulic directional control valves needed to be replaced. Helen contacted the original manufacturer of hydraulic directional control valve. Per the manufacturer, the delivered hydraulic directional control valves met the requirements of Helen's parameters, and the accuracy also fully met the standard. As a novice, Helen was helpless, and the technician did not specifically say why to replace the hydraulic direction control valves. She tried to contact the new hydraulic directional control valve manufacturer to solve the problem. Helen left a message on AAK website: why is the plunger hydraulic cylinder equipped with hydraulic directional control valve noisy? At this moment, we can't tell the reason. After communicating with Helen, I learned the process of purchasing this hydraulic directional control valve and the judgment of technician in their company. AAK engineers are not 100% sure that where the problem is according to the hydraulic directional control valve drawings sent by Helen, the shipment sample of the original manufacturer and the video of their technician's machine test. We are thinking if Helen, as a novice, has mistaken the type of hydraulic directional control valve? The hydraulic directional control valves can be divided into internal leakage type and external leakage type. Combined with the working conditions, this plunger hydraulic cylinder just reverses the oil outlet chamber, and the back pressure is high. If the internal leakage hydraulic directional control valve is used, there will be abnormal phenomena such as vibration or noise. We told Helen our thinking. She really did not note to the original manufacturer that the hydraulic directional control valve is internal leakage or external leakage. I told her that AAK has ready-made samples of the external leakage hydraulic directional control valve. It is recommended to test the machine with AAK hydraulic directional control valve to see if there is still vibration or abnormal noise. A week later, Helen sent an email saying that AAK hydraulic directional control valve was installed and there was no abnormality in the test run. Helen said privately that she contacted many manufacturers of hydraulic directional control valves. AAK was the first hydraulic valve manufacturer willing to help solve the problem in time. With the help of AAK, she passed the probation period smoothly. AAK is her first trusted Chinese hydraulic valve manufacturer. AAK hydraulic directional control valves, do something you trust, welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-directional-control-valves- 187

Cannan is from Israel. Recently, they developed a hydraulic unit, which requires high-precision hydraulic screw-in cartridge flow control valves. The service life needs to be no less than 1 million times. Cannan received a hydraulic screw-in cartridge flow control valve recommended by their original supplier. It was a valve equivalent to HydraForce standard part and all parameters met his hydraulic unit operating conditions. Cannan greatly appreciated the recommendation of this hydraulic cartridge valve supplier, because this standard part can be used instead of customizing the hydraulic cartridge flow control valve specially. What Cannan didn't expect was that after the hydraulic unit had been running for about 6 months, they received customer complaints about several hydraulic cartridge flow control valves leaking. At the beginning, Cannan thought that it was just an isolated case. With more and more complaints at a later time, Cannan realized that the original supplier's hydraulic cartridge flow control valves only had a service life of less than 1 million times. The manufacturer of the original hydraulic cartridge low control valve stated that the high operating frequency of the equipment caused damage to the hydraulic cartridge flow control valve. The only solution is to replace with new ones. Cannan was very helpless. Cannan found AAK hydraulic cartridge valve website on Google. He noticed that AAK has multiple cases regarding the service life of hydraulic cartridge flow control valves. He left us a message: Can AAK guarantee the service life of each hydraulic screw-in cartridge flow control valve over 1 million times? At the same time, he listed us the HydraForce model code of the hydraulic screw-in cartridge flow control valve. I told him that the service life of this hydraulic cartridge flow control valve is not only determined by the selection of materials, the precision of processing, but also the durability testing. AAK controls quality from these 3 aspects. Cannan requested me to send him 30 samples from our inventory. I delivered them within 1 week, and also sent him a video of AAK testing the durability of hydraulic cartridge flow control valves. The key to the service life of AAK hydraulic cartridge flow control valve over 1 million times lies in the selection of materials, precision processing, and durability testing. Let's not talk about the first two aspects, but mainly about the durability testing equipment independently developed by AAK, which is the last eagle eye in the service life of AAK hydraulic cartridge flow control valves. For each batch of hydraulic cartridge flow control valves, we randomly select 20% of the quantity and test the durability of the valves. Set the pressure and flow rate within the required range, set the number of tests, and start testing. During the testing process, the equipment can automatically control the hydraulic cartridge flow control valve to open and close. During testing, if there are any abnormalities, the device will automatically give a reminder. AAK hydraulic cartridge flow control valve, is controlled from 3 aspects, to get a guaranteed service life of 1 million times. You can also give it a try! AAK HYDRAULIC VALVES (631) 2023-07-20 https://www.aakindustry.com/info , -detail/cartridge-flow-control-valves-aak631

Cyrano, an experienced buyer of hydraulic cartridge valves from Greece, encountered difficulties with a batch of hydraulic cartridge relief valves. At the beginning of the year, they developed a hydraulic power unit and used a hydraulic cartridge relief valve purchased from a hydraulic cartridge valve manufacturer in Ningbo. During the commissioning of the hydraulic power unit, the operation was not stable. Their engineer found that when the overflow flow rate changes greatly, it is easy to cause a large change in the pressure at the inlet of the hydraulic cartridge relief valve. The original manufacturer reported that this hydraulic direct-acting relief valve is a standard part benchmarking HydraForce, they should have their engineer to control the system's overflow flow fluctuations, which embarrassed Cyrano. Cyrano found AAK on Google and noticed that AAK has had multiple cases of solving difficult and complex problems for customers. He emailed us to ask, "How to improve the stability of HydraForce's standard hydraulic direct-acting relief valve?". This question is too big to answer. After communication, it was learned that he had encountered a problem matching the standard part of the hydraulic cartridge relief valve with his equipment. The direction is clear, but whether to choose to optimize A to match B or optimize B to match A, there are only these 2 options. AAK engineer asked if it is possible to replace the hydraulic direct acting relief valve with a pilot operated relief valve? AAK can design according to the working conditions. He paid the development fee the next day, and 40 days later, AAK sent samples of the hydraulic cartridge relief valve. Last week, Cyrano informed that after AAK hydraulic cartridge relief valve was installed in the system, when the overflow flow changed significantly, the pressure at the inlet of the hydraulic relief valve did not change much. Their engineers were very happy and there would be no need to change the system. AAK hydraulic pilot operated relief valve can replace HydraForce hydraulic direct acting relief valve, which is actually very simple. The pilot valve and the main valve are combined to form a whole. The pilot valve controls and regulates the overflow pressure, and the main valve functions as an overflow valve. The two ends of the main valve plug are subjected to oil pressure. The main valve pressure spring is made of small stiffness material. When the overflow flow rate changes greatly, the compression amount of the pressure spring does not increase, and the pressure at the oil inlet is stable. 1. AAK hydraulic pilot operated relief valve is equipped with a first liquid chamber and a cavity for installing the valve spool. The first liquid chamber and the cavity are connected through a through hole. One end of the valve spool is located in the through hole, and the other end is connected to a pressure regulating device, which is fixed on the valve body. 2. The main valve seat is provided with an oil inlet and a return port, which are connected to the oil return port. The plug plugs the oil inlet and return ports through their ends and sides, respectively. The plug connects to the valve body through a pressure spring, and the plug has a damping hole. 3. The pressure regulating device consists of a pressure regulating screw and a spring. One end of the pressure regulating screw is connected to the spring, and the other end of the pressure regulating screw is connected to the valve body. The end face of the plug plugged into the oil inlet is a conical surface. AAK hydraulic cartridge pilot operated relief valve, high stability, you can also try it! https://www.aakindustry.com/info-detail , /cartridge-relief-valves-aak539

Last week, the video I sent to Frank about how hydraulic cartridge valve manufacturer AAK processes the valve spool of hydraulic cartridge flow control valves using a centerless grinder was not approved by him, which made me very disappointed and also helped me understand the requirements of German customers for automated production. Frank from Germany needs to develop a hydraulic flow control valve, but there is a requirement for the accuracy of the valve spool, which requires centerless grinding equipment for precision machining. Frank learned that hydraulic cartridge valve manufacturer AAK has this equipment, so he asked me to take a video of the work for his reference. The next day, Frank said, "Why does it still need a person to assist in completing it?"? I realized that Frank rejected the hydraulic cartridge valve manufacturer AAK because of this. But I'm not too worried, because the automated production process is a strong point of hydraulic cartridge valve manufacturer AAK. Although there is no chance for the hydraulic flow control valve this time, Frank, a customer who is meticulous, will definitely return to AAK. 3 days later, I said to Frank, ‘thank you for your reminder. The mechanical arm plan for automatic material retrieval and feeding equipped for the centerless grinder is already in place. It is expected that in 3 months, I will provide a video of the fully automatic centerless grinder processing the hydraulic flow control valve spool. At the same time, I will also send you some previously unmanned fully automatic processing processes’. Let's go back to last week's video to Frank that using a centerless grinder to process the spool of a hydraulic flow control valve. This CNC centerless grinder is equipped with an automatic conveyor belt. The operator only needs to place the rough machined valve spool on the conveyor belt, and the valve spool is sequentially fed into the grinding area. After one machining is completed, it is automatically placed in the next one. The grinding wheel adopts diamond grinding wheel, which provides a basis for the stable accuracy of the valve spool due to its hardness and wear resistance. The control system of the centerless grinder is stable, with no faults during long-term processing, and the stability of grinding provides assurance for the accuracy and stability of the valve spool. Thanks to Frank's advice again. In fact, the more requirements customers have for you, the more they hope you will grow until you meet the qualifications of their preferred supplier. I like this type of customers. AAK hydraulic cartridge flow control valve, German customer's suggestion, AAK landing, you can also give it a try! AAK HYDRAULIC CARTRIDGE VALVES (745) 2023-12-26 https://www.aakindustry.com/info , -detail/flow-control-valves-aak745