Valves

In the Spring Festival, I received a confirmed price for a large quantity of hydraulic check valves from Stephen. The contact between Stephen and I is only 2-3 times in the whole last year. It was noted at the end of the email that he needs me to contact him as soon as possible to discuss this hydraulic check valve. Stephen comes from American CASE company. We met the year before last. After communication, it was learned that at the beginning of last year, a bulldozer of their company needed to use hydraulic check valve, the one that AAK had made samples at the beginning. Because the price of AAK hydraulic check valve was 20% higher than that of his original supplier, Stephen did not choose to purchase hydraulic check valve from AAK. Some time ago, the customer complained that the hydraulic pump was damaged due to the sudden increase of hydraulic system pressure. Stephen communicated with the original hydraulic check valve manufacturer and the manufacturer replaced the hydraulic check valve with a new one, but 3 months later, the same problem came again. The customer was very dissatisfied that this delayed the construction and needed the problem solved at one time. Stephen went back to AAK and asked about the price of the hydraulic check valve. He needed us to maintain the quotation offered last year. I asked Stephen why he went back to AAK to purchase the hydraulic check valve. He told that since the first complaint from the customer, their engineers retested the original hydraulic check valve samples. The hardness of AAK sample was the highest, and the material hardness of each part of the hydraulic check valve was no less than HRC65. I know why their hydraulic check valve went on strike in 3 months. When we made the sample, we knew that the working pressure was more than 450bar, which was a challenge for the hydraulic check valve. The material hardness of each part of the hydraulic check valve is required to reach more than HRC65. There may be no more than 5 hydraulic valve manufacturers that can reach this level in Ningbo. Stephen wondered why the material hardness of each part of AAK hydraulic check valve can be over HRC65? 1.Material selection is the core. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany for this hydraulic check valve. 2.Heat treatment is the key. Through secondary quenching + cryogenic treatment + low-temperature tempering process, it is cooled to 650 ~ 700 ℃ and put into the furnace. After cooling to 450 ~ 500 ℃, it is discharged from the furnace. The micro hardness is 237 ~ 247 HV. 3.In the later stage, point-to-point testing is the key. SonoDur3, a Rockwell hardness tester imported from Germany, adopts the UCI hardness test method, and the test program is fast and mobile to carry out nondestructive testing on the hardness of each component of the hydraulic check valve efficiently and accurately. Stephen may understand that AAK has extreme pursuit for the hardness of hydraulic check valve to meet the working pressure above 450bar. Two days later, after the order of the hydraulic check valve was confirmed, he said that the complaint about the hydraulic check valve that had plagued him for half a year was finally solved at one time. We told him that he only needs to wait patiently for the delivery in 40 days, and the rest will be left to AAK. AAK hydraulic check valve is exquisite in every detail. Welcome to give it a try! https://www.aakindustry.com/info-d , etail/hydraulic-check-valves-aak152

When back from the Spring Festival, we received a reorder for 120 hydraulic threaded cartridge valves from Echerle company. Dean has been engaged in hydraulic parts purchasing in Echerle company for many years, and has been doing very well. The boss also trusts him. At the beginning of last year, the company developed a new hydraulic power unit, which has high requirements for the accuracy of the hydraulic threaded cartridge valve to be used. Because of the high accuracy requirement, the original hydraulic threaded cartridge valve manufacturer said that he was not able to achieve it. Dean used a new hydraulic threaded cartridge valve manufacturer finally. After their hydraulic power unit equipment has been sold for just less than 3 months, the customer complained about insufficient power supply. Their engineers believe that the hydraulic threaded cartridge valve was stuck and caused the problem. However, the hydraulic threaded cartridge valve manufacturer believes that it is caused by the uncleanness of hydraulic oil, but the engineer detected that the hydraulic oil is normal. The boss was not satisfied with such a hydraulic threaded cartridge valve manufacturer and asked dean to find a new hydraulic valve manufacturer and replenish goods as soon as possible. Dean left a message on AAK website and asked, what are the reasons for the stuck of the hydraulic threaded cartridge valve? We estimated that he had encountered the complaint about the stuck of hydraulic threaded cartridge valve. After communication, we learned that he was cheated by the new hydraulic valve manufacturer. According to the hydraulic threaded cartridge valve drawings sent by him, the accuracy requirements are high, especially the dimensional accuracy requirement of the valve hole is IT7 ~ 4. Among the hydraulic valve manufacturers in Ningbo, there may be no more than 3 factories that are able to meet it. We suggested Dean send the abnormal hydraulic threaded cartridge valve to us. After receiving and disassembling the sample, it was found that the cylindricity and coaxiality of the valve hole of the hydraulic threaded cartridge valve had errors, that is, the accuracy was not enough, the pressure in the matching gap between the valve hole and the valve spool is not balanced, resulting in the limited flexibility and easy stagnation of the valve spool in the valve body. Dean asked whether we can produce hydraulic threaded cartridge valves meeting valve hole accuracy requirements of IT7 ~ 4? We told Dean that for the hydraulic threaded cartridge valve, the valve hole accuracy is the key point and also the difficulty of quality control process. It directly affects the working performance, service life and stability of the hydraulic threaded cartridge valve. General hydraulic valve manufacturers surrender to this accuracy. AAK has a precision honing machine imported from the United States, which guarantees the finishing of the valve hole of the hydraulic thread cartridge valve, and has the special machine operated by a specially assigned person. After honing, the dimensional accuracy of the valve hole of the hydraulic threaded cartridge valve is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04 microns. Dean first placed a test order of 10 hydraulic threaded cartridge valves to solve customer complaints. After 30 days, Dean informed us by email that their engineer was very satisfied with all the data detected from AAK hydraulic threaded cartridge valve, especially the accuracy of valve hole. After installing AAK hydraulic threaded cartridge valve, the hydraulic power unit restored. If there is no any problem after being used for 3 months, they will place another order for 120 hydraulic threaded cartridge valves. AAK hydraulic threaded cartridge valve, the valve hole accuracy is praised by the customer's engineers, and you can also give it a try. https://www.aakindustry.com/info-detai , l/hydraulic-threaded-cartridge-valves- aak151

Malcolm is a purchaser from an American hydraulic equipment manufacturer. He has purchased various hydraulic valves from AAK for some years. We know each other very well. At the beginning of the year before last, their company received an urgent order from a customer in South America. The company required that the accessories of the whole hydraulic system must be in place within 20 days. AAK is their long-term supplier of hydraulic valve blocks. Malcolm estimates that if the hydraulic valve blocks are purchased from AAK this time, including the transportation and customs clearance time, it will be over 20 days. AAK is only required to offer the quotation according to the hydraulic valve block drawings for their file and is informed that due to time constraints, they will first purchase the hydraulic valve blocks from the local hydraulic valve manufacturer this time. About 8 months after our quotation, Malcolm asked by email about what is the reason for the leakage of the hydraulic valve blocks. I asked jokingly if leakage happened in the hydraulic valve blocks purchased locally last time. He said that the customer initially complained that about 30% of the hydraulic valve blocks were leaking. The local manufacturer also replaced the bad hydraulic valve blocks with new ones. However, 3-4 months after installation, the customer reported that there was leakage fault of the hydraulic valve blocks again. Now the customer is not satisfied with the stability of the hydraulic valve blocks and needs the leakage problem of the hydraulic valve blocks solved at one time. The trouble is that the local hydraulic valve manufacturer in the United States does not cooperate to replace the hydraulic valve blocks again. We replied that if we simply look at the leakage cause of the hydraulic valve block, the probability is that the surface roughness of the hydraulic valve block is not up to standard, or the roughness Ra value of the hydraulic valve block is unstable. According to the requirements of these working conditions of your hydraulic equipment, if the Ra value is stable at 0.4um, the problem of hydraulic valve block leakage will not occur. 10 days later, AAK sent 12 samples of hydraulic valve blocks for emergency first. After 20 days, the remaining 30% of the hydraulic valve block was sent from AAK. Now, 12 months have passed, and no complaint from customer. Malcolm mentioned 2 days ago that the customer was ready to place an order again. This time, his boss said that no matter how urgent it was, it was necessary to purchase from AAK, because AAK hydraulic valve block was the most trustworthy, and the boss would communicate with the customer about the delivery date. Why can AAK achieve the surface roughness Ra value of hydraulic valve block to 0.4um? First of all, the Ra value of the hydraulic valve is the cornerstone. The coarser the surface, the easier it is to wear. The intermediate gap gradually increases during use, which ultimately affects the sealing effect of the hydraulic valve block and the service life of the hydraulic system. Secondly, a small Ra value is the key and the focus of operation. After processing the hydraulic valve block, AAK will focus on the detection of Ra value and use TYLYROND® 500 Pro Series ultra-high precision profile measuring instrument, the most high-end in the world, from British Taylor Hopson company, ensure the measurement accuracy and stability of Ra value more than similar instruments. The Talym sensor, has an industry leading measurement range of 4mm, and the measurement resolution is 16nm-0.3nm, which can measure in any attitude, whether horizontal or vertical, and the measuring force remains unchanged. Thus, the surface roughness of each hydraulic valve block can be accurately, stably and efficiently tested. AAK hydraulic valve block, is ingeniously operated and processed, tested by high-end testing equipment. Our American customer has replaced his local original manufacturer in the United States with AAK. You can also have a small try! https://www.aakindustry.com/info-d , etail/hydraulic-valve-blocks-aak150

Beacan is from Egypt and has been purchased from hydraulic cartridge valve manufacturers in China for 1 year. In December of last year, a batch of their hydraulic pilot-operated cartridge relief valves was complained of large pressure fluctuations by customer. The original manufacturer of the hydraulic cartridge relief valve said that it was necessary to optimize the internal structure, but it was uncertain. Beacan contacted other hydraulic cartridge valve manufacturers, but there was no solution. Beacan was worried. Beacan found AAK hydraulic cartridge valve website on Google and noticed that AAK has solved the problem of hydraulic cartridge relief valve for customers. He left us a message: Can you solve the problem of large pressure fluctuation of hydraulic cartridge pilot-operated relief valve? After communication, I learned that he had trouble purchasing the hydraulic cartridge relief valve. He dissected the original sample and sent me the picture of the internal structure of the original hydraulic cartridge relief valve. I told him that we had solved problems of similar cases before and provided him the pictures of hydraulic cartridge relief valves for his reference. The pilot valve spool of his hydraulic cartridge relief valve is a traditional T structure, and the inclined angle with a convex ball is used as a whole, which will lead to abnormal linear changes in the internal pressure of the hydraulic cartridge relief valve, resulting in pressure instability or large fluctuations. Beacan should have accepted our judgment and placed an order of 480 hydraulic cartridge relief valves directly. He required that the samples should be sent within 40 days. Last week, Beacan informed us that their customer was satisfied with AAK hydraulic cartridge pilot-operated relief valve and mass production can be started. AAK has made 3 optimizations in the pilot valve spool and damping valve spool to ensure that the valve spool steel ball seals the oil inlet valve spool, and the pressure fluctuation is small and stable. 1. The pilot valve spool of AAK hydraulic cartridge relief valve adopts cylindrical groove instead of the original cartridge valve manufacturer's T structure. The valve spool bevel angle has cylindrical groove, and the groove is embedded with the valve spool steel ball. The advantage of this is that the valve spool steel ball can fully fit the valve spool oil inlet, with large contact surface, and can seal the oil inlet from any direction to avoid pressure fluctuation. 2. One end of the pressure regulating spring is connected with the pilot valve spool, and the other end is connected with a damping valve spool. This advantage is that when it is opened, the oil can quickly fill the cavity between the pilot valve seat and the main valve spool. The opening speed of the hydraulic cartridge pilot-operated relief valve can be increased by more than 30%. 3. There are fixed valve sleeves on both sides of the pressure regulating valve sleeve. The fixed valve sleeve and the pressure regulating valve sleeve are connected by sealing elements, which can ensure the tightness of the pressure regulating valve sleeve and the fixed valve sleeve without leakage and ensure the stability of the pressure. AAK hydraulic cartridge pilot-operated relief valve, has small pressure fluctuation and is stable. You can also try it! https://www.aakindustry.com/info-detail/ca , rtridge-relief-valves-aak530

The competition of hydraulic cartridge valves in the Türkiye market is very fierce, and the order is lost when the price is high. Hassan is from Türkiye. It has been 3 years since he purchased hydraulic cartridge valves from AAK. Last September, he inquired about a hydraulic cartridge valve equivalent to HydraForce standard part RV10-20A. Because AAK's quotation was 12% higher, he placed the order elsewhere, but he returned 6 months later. No matter how fierce the price competition for hydraulic cartridge valves is, everything goes to zero without manufacturing quality. Last September, Hassan’s Company launched a hydraulic crushing hammer that has requirements on the pressure resistance and leakage resistance of hydraulic cartridge valves. As he is a loyal customer of AAK, we provided the price of the hydraulic cartridge valve RV10-20A on the same day. 1 week later, Hassan proactively informed us that the price of AAK hydraulic cartridge valves was 12% higher than other hydraulic cartridge valve manufacturers in Ningbo China. Although AAK did not get the order, I really like customers who truthfully inform us of the progress. 6 months later, Hassan suddenly asked me if the price for the hydraulic cartridge valve RV10-20A I quoted last time was still valid. After communication, it was learned that the hydraulic cartridge valve produced by the other manufacturer leaked, causing abnormal operation of the hydraulic crushing hammer. Their engineers reported that there were signs of leakage at the connection between the hydraulic cartridge valve cover cap and the valve seat. The original manufacturer blamed the hydraulic crushing hammer for causing too much vibration, resulting in loose connections and leakage. I asked Hassan back, did the hydraulic cartridge valves previously supplied by AAK leak at the connection? This is a small detail issue, as long as it is handled properly, there will be no leakage. At the end of April, we delivered 200 pcs of RV10-20A hydraulic cartridge valves, which solved his urgent need. Yesterday, Hassan sent an email with plans to repurchase 200 pcs of RV10-20A hydraulic cartridge valves. If small details are handled improperly, they will become major issues. The AAK hydraulic cartridge valves have never had the leakage issue at the connection between the valve cover cap and the valve seat caused because of the vibration. The key is that before assembly of each hydraulic cartridge valve, Loctite thread anaerobic adhesive is applied to the threaded connection and the valve seat is tightened. However, most hydraulic cartridge valve manufacturers omitted this process. Thread anaerobic adhesive is a single component sealing adhesive. When the adhesive surface is isolated from air and catalyzed, it can quickly polymerize and cure at room temperature, achieving 100% sealing. This thread anaerobic adhesive has properties such as heat resistance, pressure resistance, low temperature resistance, impact resistance, shock absorption, and anti- corrosion. As long as it is not in ultra-high temperature medium, it is 100% no leakage. AAK hydraulic cartridge valves, with small details, vibration resistance, and no leakage, you can also give it a try! AAK HYDRAULIC VALVES (620) 2023-07-04 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak620

Asa from Israel contacted me a while ago. This guy hasn't contacted hydraulic manifold manufacturer AAK for 3 months. I realized he was facing difficulties before I opened the email. Asa requested hydraulic manifold manufacturer AAK to complete a test order for 3 pcs of complex hydraulic manifold blocks within 30 days. After communication, it was learned that the hydraulic manifold blocks were purchased and then assembled onto the hydraulic manifolds in Israel. The customer is a hydraulic manifold manufacturer in Israel. Asa contacted 6 hydraulic manifold manufacturers in Ningbo, all of which require 50 days or more, but his engineer can only give him 30 days, so he needs AAK's help. He can provide machining drawings for the hydraulic manifold block, not just design drawings of the hydraulic manifold block. According to the provided drawings, the oil circuit of this hydraulic manifold block is too complex and requires high accuracy. Most machining centers cannot afford this hydraulic manifold block, which is also the reason why other hydraulic manifold manufacturers are unwilling to accept this order. AAK uses American HAAS vertical machining center to process Asa’s hydraulic manifold block. This equipment not only solves the problem of time, but also solves the concern of accuracy. The machining center adopts a vertical structure, while most hydraulic manifold manufacturers prefer to use traditional horizontal equipment. However, vertical equipment is more stable, with the main spindle perpendicular to the worktable and can process multiple axes simultaneously, reducing vibration or displacement and ensuring machining accuracy. Its 3-axis configuration includes an X-axis of 800mm, a Y-axis of 630mm, and a Z-axis of 630mm, with a maximum speed of 10,000rpm. Especially the multifunctional processing ability is the main reason why the master of hydraulic manifold manufacturer AAK likes this equipment. It is equipped with 24 knives, which can perform 4 processes - milling, drilling, boring, and tapping at once. Through different tool and process parameter settings, the processing of complex oil circuits becomes easy to operate. Yesterday, hydraulic manifold manufacturer AAK completed the production of 3 hydraulic manifold blocks and sent the pictures to Asa. Today, they were picked up by the courier company. Asa's concerns were relieved. He can also report to his engineer. I believe this hydraulic manifold block will be re- ordered soon. AAK hydraulic manifold block, delivery is 70% faster than peers, you can also try it out! AAK HYDRAULIC VALVES (731) 2023-12-07 https://www.aakindustry.com/info , -detail/hydraulic-manifold-manufacturers- aak73 , 1

The cylindricity of the valve hole of the hydraulic cartridge directional control valve is 0.002mm, and the roughness is Ra0.05. The supplier who has cooperated for 3 years gave up 2 weeks after receiving the order. After AAK took over, the precision of the hydraulic cartridge directional control valve was constantly challenged from 3 aspects. After processing, the cylindricity was less than 0.001 mm, the roughness was Ra 0.04, and the consistency of component dimensions was within 0.001 mm. 3 months later, Santiago gave AAK an order for 1000 hydraulic cartridge directional control valves. Santiago is from a hydraulic equipment manufacturing company in Brazil. In January this year, their company needed a batch of hydraulic power units with high requirements, which also had high requirements for hydraulic cartridge directional control valves, especially the valve hole cylindricity below 0.002mm and roughness Ra0.05. Santiago chose a hydraulic cartridge valve manufacturer who had cooperated for 3 years to make samples. 2 weeks later, the manufacturer gave up due to not able to meet the valve hole high accuracy of the hydraulic cartridge directional control valve. Santiago found AAK on Google and needed our help to sample it. After communication, we learned that the original manufacturer was not helpful. I told him that for hydraulic cartridge valves with similar accuracy, we had customized them and also supplied them to Brazilian customers. Santiago seemed to see hope and sent a test order for 20 hydraulic cartridge directional control valves. After 40 days, AAK delivered samples. After receiving the samples, Santiago just advised us that the sample accuracy met the requirements, and there was no further news. 3 months later, Santiago suddenly sent us an order for 1000 hydraulic cartridge directional control valves, and advised us that their customer was very satisfied with their hydraulic power units. They successfully received a large order from customer. They also stressed the importance of large goods, and should ensure that there is no deviation in accuracy. AAK's machining of hydraulic cartridge directional control valve holes with high precision requirements mainly comes from 3 points. Once determined, there is no deviation. 1. In the rough machining process, the high-precision machine tool in Japan and the high-pressure internal cold drilling U-drill are used. The range of valve hole diameter can be 13.5mm, and the hole straightness can be within 0.02mm. General hydraulic cartridge valve manufacturers do not have this kind of drill. 2. In the high-precision valve hole honing, the fixed size honing is adopted, which does not expand or shrink during processing, and the size allowance can be gradually removed in order. After processing, the cylindricity can be less than 0.001 mm, the roughness Ra0.04, and the size consistency of each element is within 0.001 mm. 3. For the machining of micro oil passage holes, micro hole EDM and micro hole jet grinding are used to remove the burrs at the cross holes and effectively improve the surface roughness of the inner holes. The hole diameter tolerance after machining is 0.001mm and the ring belt coaxial is 0.001mm. AAK hydraulic cartridge directional control valve, with unique processing skills, you are welcome to try a small order! https://www.aakindustry.com/info-det , ail/directional-control-valves-aak455

Sulaiman comes from Brazil, and their hydraulic cylinder business is mainly with the local engineering machinery manufacturers. In the second half of last year, a batch of their hydraulic cylinders used on cranes almost caused an accident. The root cause was the hydraulic cartridge counterbalance valve, which was lack of function. During the construction of the crane, the hydraulic oil pipe burst suddenly, and the crane dropped rapidly to the ground. During on-site inspection, it was found that the oil cylinder operated normally, and the hydraulic system also complied with the principle. The local manufacturer of the hydraulic cartridge counterbalance valves reported that there was no problem with the manufacturing quality. After 1 week, there was no progress in the after-sales plan. The customer was not satisfied, the boss was unhappy, and asked everyone to inquire through multiple channels. Although this batch of hydraulic counterbalance valves was not purchased by Sulaiman, he always felt that the reason for the abnormality of the equipment was the hydraulic cartridge counterbalance valve. He tried to ask different hydraulic cartridge valve manufacturers, but after a week, he could not get a solution. Sulaiman intended to give up. When he was browsing Google, he accidentally found AAK Hydraulic Valves. He left a message to me: I spent 36 minutes on your website and felt that AAK was able to solve the problems of hydraulic cartridge valves. I need your help. For customers who leave messages for the first time, there are few such emotional expressions. After several rounds of communication, I learned about their after-sales dilemma. According to pictures of the semi dissection of the hydraulic cartridge counterbalance valve from the original manufacturer, the drawings of the hydraulic cylinder, and the working parameters of the equipment, my first feeling is that the control function of the hydraulic cartridge counterbalance valve is not complete, so the hydraulic counterbalance valve needs to be redesigned, and at the same time, the protection function of the cylinder needs to be added. Sulaiman felt that AAK had come to the point. He paid $800 development cost to AAK at his own expense and asked me to design and customize 10 hydraulic counterbalance valve samples as soon as possible. 3 months after the samples of the hydraulic counterbalance valves were sent, Sulaiman told us that after the AAK hydraulic counterbalance valve was used, the crane was no longer abnormal and had a more sense of control than before. The customer was very satisfied. I told him that the hydraulic counterbalance valve designed by AAK has the function of load limit protection circuit. If the pressure rises too fast in the case of reverse locking, it will automatically open for overflow, and the operation of the hydraulic counterbalance valve is not affected by the back pressure. When the pressure at the valve port increases, it can also maintain a stable opening of the valve spool, which can achieve the balance protection control of the hydraulic cylinder. Even if the oil pipe bursts, it can protect the oil cylinder and prevent the crane from dropping rapidly. Last week, Sulaiman privately informed that he had been promoted to the manager of Procurement Department 2, thanks to his after-sales plan this time. At the same time, he is looking forward to conducting all-round cooperation with AAK. AAK hydraulic counterbalance valve, has bright points in control, and 0 accident. You can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-counterbalance- valves-aa , k392

Andrew is the purchasing director of VIS Hydraulics in Italy and an old friend of AAK. He has cooperated with AAK for more than 4 years. One morning in October, I received an email from Andrew with the subject of "a big trouble". It is the first time that I received such an emotional email from Andrew. After reading, it turned out that the pressure of a hydraulic power system of their company was not enough, and the customer complained. The root of the problem is that the hydraulic threaded cartridge valve and hydraulic valve block does not match each other. The boss asked him to solve the problem within a month. After communication, it was learned that the hydraulic threaded cartridge valve and the hydraulic valve block purchased by Andrew were not produced by the same manufacturer. Now both manufacturers do not admit that it was their own problem. The hydraulic threaded cartridge valve manufacturer said that the pressure of the hydraulic system was slow due to the processing accuracy of the hydraulic valve block, while the hydraulic valve block manufacturer said that the hydraulic threaded cartridge valve had leakage, resulting in insufficient flow. Andrew failed to communicate for several times and thought of AAK. During so many years of cooperation, only AAK hydraulic valve has no complaint. He hopes that AAK can help him find out what the problem is. Andrew sent us the design drawings of the hydraulic threaded cartridge valve and hydraulic valve block. After analysis, AAK engineers found that the probability is that the design of the hydraulic valve block is unreasonable, the flow area of the through hole designed is not enough, and the direction and position of the oil inlet and outlet are not optimal, resulting in insufficient pressure of the whole hydraulic system. Andrew asked the hydraulic valve block manufacturer to design and produce, but the manufacturer needs 2 months to complete it, while the time given by his boss is only 1 month. Andrew asked the fastest time that AAK can finish the hydraulic valve block. Our engineers are worried that there may be deviation if design the hydraulic valve block alone. If combined with the mapping of the valve, we can achieve 100% of the optimal design scheme. We recommended Andrew to send us the hydraulic threaded cartridge valve, too. After receiving it, the scanning analysis was carried out, and the design scheme was obtained 2 days later. After 20 days, the redesigned hydraulic valve block was sent to Andrew. After installation and commissioning, the pressure of the hydraulic system was normal. After the complaint was resolved, the boss was also happy and asked Andrew to purchase both the hydraulic threaded cartridge valve and hydraulic valve block from AAK in the future. Don't purchase them separately any more. AAK engineers use professional automation studio version 7.0 software to automatically generate simulated hydraulic valve block of the threaded cartridge valve, scan and identify the external structure of each threaded cartridge valve, which can directly drag and generate 2D schematic diagram and 3D manifold design drawing in the most intuitive, fastest and simplest way, and then automatically generate the production drawing of hydraulic valve block through the created 2D diagram, with effective and accurate layout of each channel design. The generated data can be directly imported into the CNC machining center system. Compared with the normal design, it can effectively shorten the modification cycle, demonstrate with higher quality and improve the production process, so as to realize the high-efficiency design and processing of hydraulic valve block. AAK hydraulic valve block is designed by using advanced 3D simulation design software. It can be designed and processed easily. Welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-valve-block-aak149

Compared among 20 hydraulic relief valve manufacturers, none of them is able to do the hydraulic relief valve with 2 million times of durability. AAK hydraulic valve finally achieved it after 3 times of sampling. Friedlich worked in polar company for 4 years and was promoted and raised for the first time. At the beginning of last year, Polar company wanted to develop a new paper cutter. It is expected that the production efficiency will be increased by 50% on the original basis, and the hydraulic relief valve in the hydraulic system is the key, especially the durability of the hydraulic relief valve is required to be 2 million times. The durability of the hydraulic relief valve they previously purchased is basically about 1.2 million times. Friedlich was assigned to purchase this hydraulic relief valve. He realized that this is a challenge and also an opportunity to improve himself. First, he issued proofing requirements to the original hydraulic relief valve manufacturers, asked them to redesign a new production process for the hydraulic relief valve and make samples for testing. After 20 days, Friedlich received samples of hydraulic relief valves from 3 manufacturers. After 1.5 million times, the valve spool or valve body of the hydraulic relief valve was worn one after another, and none of the manufacturers was successful. Friedlich asked the manufacturer with the best durability to make new samples. The manufacturer advised that this is the best durability that he can achieve at present. If a better sample is needed, it takes time to study and try. Friedlich had to find a new hydraulic relief valve supplier. He contacted more than 20 hydraulic valve manufacturers successively. Some had no reply, and some were willing to make a sample for the durability test of hydraulic relief valve. At that time, when AAK received the drawings and working condition requirements from Friedlich, our engineers were also not sure at the beginning, because the durability test of the hydraulic relief valve was more than 2 million times, which has a very high requirement for the material selection. With the efforts of more than 2 months, after the selection, comparison, test to the steel materials and 3 times of sampling, the new production process of hydraulic relief valve was determined. Friedlich received the sample of AAK hydraulic relief valve and conducted the durability test. 2 weeks later, Friedlich asked about the production time of 420 hydraulic relief valves and informed that although AAK was the last one among more than 20 hydraulic valve manufacturers to provide samples of hydraulic relief valves, it was also the only one to pass 2 million durability tests. Last week, almost half a year after these hydraulic relief valves were shipped, Friedlich thanked AAK by email that their paper cutter was equipped with the hydraulic relief valve provided by AAK, it has no any quality complaint and is now selling well. The boss is very satisfied with his purchasing performance. He has worked for 4 years and is now promoted to purchasing manager. He wants to know why only AAK hydraulic relief valve has such good durability. AAK selects 3Cr3Mo3W2V hot working die steel, which can withstand huge mechanical stress in work. It not only has high hardness, strength, wear resistance and toughness, but also has good high-temperature strength, thermal fatigue stability, thermal conductivity and corrosion resistance. At the same time, its high hardenability ensures that the whole section has consistent mechanical properties. Thus, the hydraulic relief valve is protected from erosion during the operation of the hydraulic system, so as to ensure its durability. AAK hydraulic relief valve, the material is selected, designed and produced according to the needs of customers, you are welcome to try a small order! https://www.aakindustry.com/info-det , ail/hydraulic-relief-valve-aak148

Vasiliev is a purchaser from an oil field production company in Russia. Although he has not been in office for a long time, his purchasing is very smooth. Early last year, he purchased a batch of hydraulic relief valves for the hydraulic system of drilling rigs for oil exploration in Alaska. The testing on the hydraulic relief valve sample from the original supplier was smooth, but the drilling machine was unable to start after working for about 3 months. It was judged on site that the hydraulic relief valve in the equipment was leaking. After further disassembling the hydraulic relief valve, it was found that the O-ring in the hydraulic relief valve was worn and broken. Vasiliev contacted the original hydraulic valve manufacturer. The manufacturer replied that the standard nitrile rubber (NBR) O-ring used for this hydraulic relief valve has a service life of at least more than 1 year. He asked Vasiliev to check the temperature of the working environment. When he learned that it was extremely cold at - 50 ℃, the manufacturer said that the sealing ring of the hydraulic relief valve can only be replaced once every 3 months, and there is no other alternative sealing ring. Vasiliev was helpless and had to replace the sealing ring of the hydraulic relief valve to maintain the start-up. Two months after the new O-ring was installed, the hydraulic relief valve leaked again. The engineer complained that the hydraulic relief valve purchased by Vasiliev was too unreliable. Vasiliev has to find new suppliers. He contacted with more than 30 hydraulic valve manufacturers, including we AAK hydraulic valve. Nearly all manufacturers replied that under the extremely cold condition of - 50 ℃, it is normal for sealing ring to have a service life of only 2-3 months. Only a few hydraulic valve manufacturers are willing to test new materials, but the lead time is to be determined. After receiving the email, AAK just asked about the quantity and delivery date, and told Vasiliev that our product quality can be guaranteed for 1 year under the extremely cold condition of - 50 ℃. Vasiliev may have realized the AAK hydraulic valve is some different, and asked about 4 why and 3 how in a short email. We replied that there is no need to make sample for this hydraulic relief valve, because we produced a hydraulic relief valve for a North American customer that was used under similar working conditions the year before last. It has been used for more than 1 year and there was no complaint about the leakage of the hydraulic relief valve. Vasiliev was still rather in doubt about this, but he had no other choice except to try AAK hydraulic relief valve, because other hydraulic valve manufacturers either gave up or can not determine the lead time. After 30 days, AAK delivered the hydraulic relief valve as scheduled. After the test was normal, the original hydraulic relief valve was replaced. 6 months later, we asked Vasiliev whether the customer complained about the abnormal hydraulic relief valve. Vasiliev said that AAK hydraulic relief valve was in normal use. His boss was surprised that AAK had done something that more than 30 other hydraulic valve manufacturers could not do. Now the new project is to be developed, and the boss requested that the hydraulic relief valve should be purchased from AAK. AAK hydraulic relief valve uses ZnO / MAA reinforced hydrogenated nitrile rubber (HNBR) O-ring. The high temperature resistance of this O-ring is 130 ~ 180 ℃, and the cold resistance is - 55 ~ - 38 ℃. Compared with the ordinary nitrile butadiene rubber ring, silicon rubber, fluororubber, Polytetrachloroethylene O-ring, it has better performance on cold resistance and radiation resistance, is more suitable for extreme cold environment, and can greatly improve the service life of O-ring. AAK hydraulic relief valve with specially treated hydrogenated nitrile rubber (HNBR) O-ring can still be used for more than 1 year even under the extremely cold condition of - 55 ℃, and this Russian client don't want to find a second hydraulic relief valve supplier any more. AAK hydraulic relief valve has a service life of at least 1 year under extremely cold conditions of - 55 ℃. Welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-relief-valves-aak147

Mablevi is from Turkey. In early November, he left a message on the hydraulic cartridge valve manufacturer AAK website: Can you deliver 200 pcs of hydraulic pressure control valves within 20 days, equivalent to HydraForce RV08-22? After communication, it was learned that Mablevi encountered delivery issue with RV08-22 purchased from other hydraulic cartridge valve manufacturers and had to repurchase it. Mablevi requires each hydraulic pressure control valve to be tested on a test bench. After 3 days of sourcing, no hydraulic cartridge valve manufacturer was able to accept the order because testing was time-consuming. Mablevi was very anxious. Mablevi requires 100% inspection and pays close attention to quality. This is the type of customers we like. I felt Mablevi's urgency, and after communicating with the workshop, it was found that there was enough time in the production process. Most hydraulic cartridge valve manufacturers should be able to produce 200 pcs of RV08-22 hydraulic pressure control valves in 20 days, but do not have enough time for testing. In the testing stage, AAK has a 1 for 5 testing bench, which is our confidence in accepting this order and also the advantage of hydraulic cartridge valve manufacturer AAK in testing. 5 years ago, we upgraded our testing bench. From testing one hydraulic pressure control valve in the past, we can now test 5 hydraulic pressure control valves at once. This testing bench has 5 independent testing oil circuits that do not interfere with each other, and can be tested together. Mablevi specifically reminded us that each hydraulic pressure control valve must be tested. I took a video of our quality inspection department testing solenoid valves on site and showed it to Mablevi. From the video, we can see how hydraulic cartridge valve manufacturer AAK can test 5 solenoid valves at once. Similarly, this test bench can also be used to test the hydraulic pressure control valves required by Mablevi. The QC in our quality control department sequentially installs 5 valves into the valve blocks, tightens them, and then puts the matching coils onto the magnetic housing, tightens the top nut, and connects the coils to the wiring port of the test bench. QC starts the test bench. During the opening stage, each pressure gauge on the test bench displays pressure data. The key of this process is that QC needs to close and activate the oil inlet control button at least 3 times to avoid blind spots, and any abnormal flow and pressure pointer mismatch. Today, we received the PO for 200 pcs of RV08-22 hydraulic pressure control valves from Mablevi. This is the first time Mablevi has placed an order with AAK. Thanks for his trust in AAK. Hydraulic cartridge valve manufacturer AAK has advantages in production efficiency compared to other hydraulic cartridge valve manufacturers in Ningbo China: 1. AAK is skilled at upgrading local device functions. 2. The manufacturing quality of hydraulic cartridge valve manufacturer AAK is comparable to that of HydraForce and stable. AAK dares to purchase various raw materials in bulk. 3. 100% pass the test bench and can test 5 hydraulic pressure control valves at once. AAK hydraulic pressure control valve, in terms of detection, 1 for 5, you can also give it a try! AAK HYDRAULIC CARTRIDGE VALVES (730) 2023-12-05 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valves-aak730

This Monday, we launched an Electro-Proportional Priority Flow Regulator Valve Cartridge equivalent to HydraForce standard part PV72-30. It is a solenoid operated, pressure compensated, spool type, normally closed, proportional priority flow control valve. The features of this proportional priority flow control valve: Excellent linearity and hysteresis characteristics. Optional coil voltages and terminations. Efficient wet-armature construction. Cartridges are voltage-interchangeable. Unitized, molded coil design. Coil waterproofing standard. Manual Override option. A customer in Brazil placed a test order for 10 pcs last June in 2022. After 1 year of testing, it proves that the function and performance of AAK hydraulic proportional priority flow control valve benchmarked the quality of HydraForce PV72-30. Today, we received their re-peat order for 1,000 pcs qty. AAK hydraulic solenoid operated proportional priority flow control valve 2 advantages: 1. Internal leakage: 0.38 lpm Max. at 207 bar (3000 psi), 0 current, benchmarking HydraForce 2. Its service life is 2 times that of its peers Technical parameters of AAK E-PV72-30 hydraulic solenoid operated proportional priority flow control valve: Max. Operating Pressure: Port 1: 240 bar (3500 psi); Port 2 and 3: 207 bar (3000 psi) Flow: See PRESSURE DROP VS. FLOW graph Internal Leakage: 0.38 lpm (0.1 gpm) Note: Max. at 207 bar (3000 psi), 0 current Cavity: 12-3  The newly launched AAK E-PV72-30 hydraulic solenoid operated proportional priority flow control valve, benchmarking HydraForce PV72-30, has been approved by customer in Brazil after 1 year of testing. You are welcome to try it out. AAK HYDRAULIC VALVES (619) 2023-07-03 https://www.aakindustry.com/info , -detail/proportional-cartridge-valves-aak619

Eugenia is from Belarus and has purchased hydraulic cartridge valves from AAK for 3 years. In the second half of last year, they developed a hydraulic power unit. Their customer asked for a price reduction of 15% to meet the market demand. Eugenia required the original hydraulic directional control cartridge valve manufacturer and his hydraulic component suppliers to reduce the price simultaneously, but it did not meet 15%. The boss was unhappy. Eugenia was very upset. Eugenia contacted me. As soon as I heard about the price reduction request of the hydraulic directional control cartridge valve, I gave up directly. 7 days later, Eugenia came to me again and asked if we could reduce the hydraulic components and combine them into a new hydraulic unit. This aroused my interest. According to the schematic diagram of the hydraulic system provided by Eugenia, AAK engineers found that there are multiple directional control cartridge valves in the equipment, which not only makes the flow path complex, but also increases the cost. Is it possible to optimize the hydraulic directional control cartridge valve in the system to replace the function of the multiple valves, and reduce the cost? Eugenia requested AAK to try samples. After 45 days, AAK sent 12 samples of hydraulic directional control cartridge valves. 2 weeks later, Eugenia informed us that after replacing those hydraulic components with AAK hydraulic directional control cartridge valve, the function of the hydraulic unit was not affected. AAK hydraulic directional control cartridge valve controls the flow of the oil port through the opening size of the hydraulic control oil port, simplifies the hydraulic oil circuit, reduces energy consumption by a little, and reduces the overall procurement cost by 20- 25%. The use of AAK hydraulic directional control cartridge valve brings her 2 additional benefits. Can Eugenia be unhappy? 1. In the valve body of the hydraulic directional control cartridge valve, there are left and right through valve holes and are connected with the valve spool in a sliding way. On the side of the valve body, there are 3 annular grooves from left to right. Each annular groove has an oil inlet connected with the valve hole and a flow hole. The screw sleeve is installed at the left end of the valve body and is connected with the transmission rod at the left end of the valve element. 2. There is a screw plug at the left end of the hydraulic directional control cartridge valve hole, which is sleeved on the transmission rod, and the return spring is sleeved on the outside of the transmission rod. There is a first spring seat on the transmission rod, and its right end extends into the valve hole through the screw plug. When the valve spool moves to the left, the return spring is compressed through the first spring seat. 3. There is a second spring seat sleeved on the transmission rod between the left end of the return spring and the plug. The left end of the transmission rod has a shoulder. When the valve spool drives the transmission rod to move to the right, the return spring is compressed through the second spring seat. The outer side of the screw sleeve is provided with a fourth annular groove, and the fourth annular groove is provided with a hydraulic control oil port connected with the mounting hole. AAK hydraulic directional control cartridge valve, 3 optimizations, 2 additional benefits, you can also try it! https://www.aakindustry.com/info-detail , /directional-control-cartridge-valves- aak529