Valves

Mathias, a Dutch hydraulic customer, urgently needed to purchase a batch of hydraulic valve blocks matching the German brand from China at the end of last year. He asked more than 10 old hydraulic valve block manufacturers. They all said that the accuracy of this hydraulic valve block was too high for their technology and equipment. Mathias had a hunch that nine times out of ten, the order for this hydraulic valve block would fail, because he knew that most hydraulic valve manufacturers just have CNC machine tools. But his boss attached great importance to this customer and asked him to implement the hydraulic valve block sample within 30 days. Within a week, Mathias consulted nearly 20 hydraulic valve block factories online and offline, almost all of them just have CNC lathes. Only two of them said that they have Japanese high- precision CNC machine tools. They can try to make samples but are not 100% sure. Two weeks later, Mathias tested the hydraulic valve block samples from 2 factories, and there was still a parameter error of 10% - 13%. Mathias suggested the factory re-make samples, and both factories surrendered. Time has been wasted for 3 weeks. It's only 2 weeks from the deadline required by the boss. Mathias is anxious and has no direction. While chatting with old friend Andy, Mathias revealed his dilemma. Andy is a veteran in the hydraulic valve industry and has cooperated with AAK hydraulic valve for 5 consecutive years. Andy told Mathias that the accuracy of this hydraulic valve block requires not only high-precision machine tools, but also old operators who understand the equipment. Most hydraulic valve block manufacturers are difficult to meet these two requirements at the same time. He suggested Mathias try AAK, who likes to overtime difficulties on high-precision hydraulic valves, and most operators have more than 5 years of experience in operating imported equipment. The subject of Mathias's first email to AAK hydraulic valve was that I was introduced by Andy. He said that the accuracy of this hydraulic valve block can only be produced in AAK. Opening his hydraulic valve block drawing, AAK engineers have 90% confidence. I replied to him directly that if it goes well, we can send the hydraulic valve block samples before the Chinese New Year holiday. Jan 28th is our last working day before CNY and the last day to send samples. Our team was great to send the samples on Jan 28th. When we came back from the Spring Festival holiday, we received an email from Mathias. Their technical team tested the accuracy of AAK hydraulic valve blocks. Each parameter met the accuracy required by the drawing, and almost every parameter was 30% higher than that of other hydraulic valve manufacturers. AAK is also the only hydraulic valve block manufacturer that can match the German brand among all the hydraulic valve manufacturers he contacted. He can finally make a report to his boss. Next, the order confirmation process of hydraulic valve blocks is very smooth. Mathias understood why Andy is optimistic that AAK can achieve the accuracy of this hydraulic valve block. AAK introduced Demage five axis machining center as early as 2 years ago. The allowable rotation range is 115 ° (- 5 ° / + 110 °), which can carry out negative angle machining up to 20 ° and high- precision machining, which can not be achieved by many imported machine tools. At the same time, the torque can reach 1800Nm, the Y-axis stroke can be increased from 1250 to 1600mm, and the maximum speed of milling spindle can reach 8000r/min, while the maximum of conventional CNC can only reach about 5000r/min. As long as the operator is familiar with the performance of the equipment, the hydraulic valve block similar complicated to that of Mathias is successfully proofed at one time. AAK hydraulic valve block is praised by Mathias that it is the only one that can match the German brand. Give it a try! https://www.aakindustry.com/info-detai , l/hydraulic-valve-blocks-aak156

Some customers choose to transport hydraulic directional control valves exported to the Russian market by train, which may cause collisions due to multiple turnover shipments in inland China. Anek from Russia has encountered a problem with China. In the second half of last year, Anek wanted to purchase a batch of hydraulic directional control valves, which is equivalent to the HydraForce standard part LS08-30. There are no less than 5 hydraulic valve manufacturers in Ningbo China that have the program for this hydraulic directional control valve. Although AAK received Anek's inquiry, he chose the hydraulic directional control valve manufacturer with lowest price to place an order. The order was finished in less than 1 month, but it took nearly 2 months on the road from Ningbo to Moscow. After receiving the shipment, Anek was dumbfounded. The outer box was cracked and deformed, and some hydraulic directional control valves had fallen out of the outer box. What's even more frustrating was that due to the collision of the hydraulic directional control valves to each other, some threads had also been damaged. The manufacturer for these hydraulic directional control valves indicated that he cannot bear responsibility for any damage caused during transportation. Anek sent an email asking me to produce 160 pcs of LS08-30 hydraulic directional control valves as soon as possible, and ship them by air for emergency assistance. After communication, it was learned that he encountered packaging problems with the original hydraulic valve manufacturer. I jokingly said that you have been purchasing from AAK for 4 years and have never encountered any problems with packaging, right? He just sent me a “like” expression and an “awkward” expression. In the manufacturing of hydraulic directional control valves, small details often determine the customer's experience. AAK checks each hydraulic directional control valve separately before entering the packaging workshop for packaging. Firstly, put the hydraulic directional control valve into a bubble bag, it just likes to wear a piece of underwear to prevent scratches. Then put it into a 3ply hard corrugated box with the fitted size, which not only provides an additional layer of protection but also fixes the hydraulic directional control valve in place. Then put 24 pcs, or 36 pcs, or 48 pcs into a 5ply corrugated cardboard boxes with fragile and easy to handle markings, and then secured with “#" shaped packaging tape. For those exceeding 10KGS, wooden boxes will be used for protection. 1 reminder, 4 protections, as long as there is no malicious human damage, the hydraulic directional control valves are 100% collision free. But most hydraulic valve manufacturers in China have no experience in dealing with exports, and the root cause is that they have become accustomed to the domestic market in China. Using the Cognitive inertia of domestic sales to export, it harms customers and also themselves. AAK hydraulic directional control valve, 1 reminder, 4 protections, 100% collision free, you can also give it a try! AAK HYDRAULIC VALVES (622) 2023-07-08 https://www.aakindustry.com/info , -detail/hydraulic-directional-control-valves- a , ak622

Henry is a purchaser of a hydraulic power unit manufacturer in the United States. He almost lost his job when he purchased the hydraulic pressure relief valves in the first time after just joining the company. AAK high-precision hydraulic pressure relief valves saved the job for him. Last October, one of their African customers customized a batch of hydraulic power unit equipment for use in African mining bases. The requirements of the equipment for the hydraulic pressure relief valves used are that there is no abnormality within 1 year. Henry contacted more than 10 hydraulic pressure relief valve manufacturers and screened 4 samples from each of 4 factories. A month later, the engineering department debugged these hydraulic pressure relief valves. Almost all hydraulic pressure relief valves from every factory have unstable hydraulic system pressure, but only the proportion is different. At first, the engineer thought it was due to the installation of hydraulic pressure relief valves or the problem of oil quality. After several commissioning, it was found that the outlet pressure of hydraulic pressure relief valves was almost equal to the inlet pressure. After disassembling the hydraulic pressure relief valves, it is found that the geometric tolerance is out of tolerance due to the accuracy of the main valve spool and valve hole. After knowing this, the boss thought that Henry had a problem on the communication with the hydraulic pressure relief valve manufacturers and asked him to solve the purchasing of the hydraulic pressure relief valves with the manufacturers within 4 weeks. Henry has made two rounds of screening for hydraulic pressure relief valve manufacturers and emphasized the working conditions, but still no one can achieve that every hydraulic pressure relief valve has no problem. He felt that he was cheated. The water in the hydraulic pressure relief valve industry was too deep. Henry found AAK hydraulic valve on Google and left a message on our website: Can AAK get the geometric tolerance of each hydraulic pressure relief valve consistent? After several rounds of e-mail communications, we learned about what happened when he purchased hydraulic pressure relief valves for the first time. We can only comfort him that he was misled by hydraulic pressure relief valve manufacturers due to lack of experience. He can test the samples of AAK hydraulic pressure relief valves. Three weeks later, AAK sent Henry 5 samples of hydraulic pressure relief valves. Their engineer tested each sample 3 times, and the hydraulic power unit equipment was normal. The boss praised his emergency ability. Now Henry doesn't have to worry about losing his job. We told Henry that according to the working conditions and drawings of this hydraulic pressure relief valve, the accuracy of each hydraulic pressure relief valve is required to meet the standard and be stable, which needs to meet two points: one is the selection of materials, the other is the control of machining accuracy and the error correction of accuracy in machining, which is the key. AAK use the GILDEMEISTER turn milling compound machining center imported from Germany. During the machining process of various parts of the valve body, the central encoder can be used to measure the position and compensate the errors caused by tool wear. The worktable adopts the static pressure guide rail with pure static pressure load, which has strong bearing capacity. At the same time, it has the c-axis position detection technology with double reading heads that is not available in general equipment. The positioning accuracy of c-axis can reach 5 arc seconds, while at present, most hydraulic pressure relief valve manufacturers do not have this kind of equipment. AAK hydraulic pressure relief valves are produced by high-precision advanced equipment. Welcome to have a small try! https://www.aakindustry.com/

Devante is from a hydraulic equipment company in Spain. He has been purchasing for 8 years and cooperating with AAK for 3 years. In June last year, a batch of hydraulic cylinders of their company were complained of telescoping jitter. During after- sales service, it was judged that the hydraulic cartridge relief valve of the hydraulic system was abnormal. After disassembly, it was found that the spring elasticity in the valve body was out of function. The manufacturer of the hydraulic cartridge relief valve thought that the high working frequency of oil cylinder caused spring failure. It could be replaced for free for good cooperation, but the complaints were increasing later. The boss was not satisfied with the hydraulic cartridge relief valves purchased by Devante this time, and Devante had a great pressure. At the beginning of last year, their engineer required the manufacturing quality of the hydraulic cartridge relief valve for the hydraulic cylinder they developed, to benchmark HydraForce. Devante believed that the function of this hydraulic cartridge relief valve is relatively conventional, so he chose a hydraulic cartridge relief valve manufacturer with competitive price. Unexpectedly, the service life would be exhausted in less than 6 months. Devante regreted choosing the wrong hydraulic cartridge valve manufacturer. He redefined the quality of this hydraulic cartridge relief valve: no repair within 1 year, and the service life of the built-in spring shall not be less than 18 months. In 1 week, only 2 hydraulic relief valve manufacturers accepted to try the samples, and AAK was one of them. 1 month later, the samples of hydraulic cartridge relief valves from 2 manufacturers were installed on different hydraulic cylinders, to PK directly. Last week, Devante emailed that the hydraulic cartridge relief valves of the cylinders had been replaced. In 1 year, there was no customer complaint about the hydraulic cylinder installed with AAK hydraulic cartridge relief valves, while the other one was just stuck in 1 year. Their engineer tested the built- in spring of AAK. After 1 year of high frequency work, its fatigue resistance was still like a new material. I replied that the difficulty of this hydraulic cartridge relief valve is just the fatigue resistance of the spring. As long as this is solved, you will have no worries about using it for 18 months. For the spring of this hydraulic cartridge relief valve, AAK uses German UP6 spring steel, which is optimized according to 60Si2Mn alloy steel. Its strength and elasticity can be fully suitable in military equipment. The fatigue resistance of the spring is more than 3 times that of other carbon steel springs, which is the core reason why the other manufacturer’s has been out of use in 1 year, while AAK's is worry free in 18 months. Although the cost of this spring is more than 2 times higher than that of other materials, even if the cost of the material is 3 to 5 times higher, the best one should be chosen. Things that are not good enough cannot be used by AAK, let alone given to users. AAK hydraulic cartridge relief valve, worry free in 18 months, welcome you to try a small order! https://www.aakindustry.com/info-det , ail/hydraulic-cartridge-relief-valves- aak393

This week, we’d like to introduce a Hydraulic Screw-in Solenoid Cartridge Valve equivalent to HydraForce standard part SV08-40. It is a solenoid-operated, 4 way, 2 position, direct-acting spool type, screw in hydraulic cartridge valve. The features of this cartridge valve: Continuous-duty rated coil. Hardened precision spool and cage for long life. Optional coil voltages and terminations. Efficient wet-armature construction. Cartridges are voltage interchangeable. All ports may be fully pressurized. Unitized, molded coil design. Manual override option. Optional waterproof E‑Coils rated up to IP69K. Compact size. A customer in Brazil placed a test order for 10 pcs last September, in 2022. After 12 months of testing, it proves that the function and performance of AAK hydraulic solenoid cartridge valve E-SV08-40 benchmarked the quality of HydraForce SV08-40. Today, we received their re-peat order for 500 pcs qty. AAK hydraulic screw-in solenoid cartridge valve 2 advantages: 1. Function and Performance benchmarking HydraForce 2. Its service life is 2 times that of its domestic peers Technical parameters of AAK E-SV08-40 Hydraulic Screw-in Solenoid Cartridge Valve: Max. Operating Pressure: 207 bar (3000 psi) Flow: 11.4 L Internal Leakage: ＜82ml/min at 207 bar (3000 psi) Temperature: - 30 to +100 °C (with Standard Buna N seals) Cavity: 08-4 Fluids: Mineral based or synthetic hydraulic fluid with lubricating properties Fluid Viscosity Range: 7.4 to 420 cSt Till now, AAK E-SV08-40 hydraulic screw-in solenoid cartridge valve has been purchased by foreign customers from Russia, Brazil, Turkey and USA. You are welcome to try it out. AAK HYDRAULIC VALVES (734) 2023-12-11 https://www.aakindustry.com/info , -detail/solenoid-cartridge-valves-aak734

Andreus is from a hydraulic equipment company in Chile. He has been in purchasing smoothly for 2 years. At the beginning of the year, their company received an inquiry for a batch of personalized excavators, and customer needed prototypes. The hydraulic cartridge counterbalance valve in the hydraulic system is the key. Their engineer asked Andreus to purchase the standard parts of SUN hydraulic cartridge counterbalance valves, but the parameters did not match, and SUN was unwilling to customize. They had to work with a hydraulic cartridge valve manufacturer who had cooperated with them for 4 years to make samples. But the test run was not smooth. When the load pressure was applied, the opening of the main valve spool of the hydraulic cartridge counterbalance valve would change, affecting the flow and causing the main engine to shake. The hydraulic cartridge counterbalance valve manufacturer had no solution but to give up. Andreus contacted more than 10 other hydraulic cartridge valve manufacturers, but still no result after 1 week. The engineer was impatient, and Andreus was worried. Andreus browsed AAK website on Google and clicked the article and product introduction about hydraulic cartridge counterbalance valves for many times. He left us a message: How to keep the hydraulic cartridge counterbalance valve free from load interference and stable flow? I replied: There are many reasons for the problem, which should be analyzed in details. According to the video of abnormal equipment sent by him, as well as the production drawings of the hydraulic cartridge counterbalance valve, AAK engineers judged that the structure should be optimized and AAK is 90% confident to solve the problem. Andreus saw the hope and asked for AAK samples. After 50 days, AAK sent 20 hydraulic cartridge counterbalance valve samples. 1 month later, Andreus informed that after the excavator was equipped with AAK hydraulic cartridge counterbalance valve, the equipment was running stably and the prototype had been sent to the customer. AAK hydraulic cartridge counterbalance valve can resist the pressure fluctuation when the load drops, and the flow is stable. We have made 3 structural optimizations. The hydraulic cartridge counterbalance valve is composed of 5 parts: valve body, valve seat, main valve spool, pilot valve spool and pilot mechanism. 1. The valve seat of the hydraulic cartridge counterbalance valve is connected with the valve body to form a connected first channel, and the extended end of the valve seat butts against the pilot mechanism to form a second channel. 2. The main valve spool of the hydraulic cartridge counterbalance valve is provided with a throttling groove, the other end is connected with the inner cavity of the main valve spool, and the pilot drive part is used to drive the pilot valve spool. 3. One end of the pilot valve spool of the hydraulic cartridge counterbalance valve is slidably arranged in the inner chamber of the main valve spool, and the other end is connected with the pilot mechanism. The pilot valve spool is also provided with a throttling groove, an axial pilot valve spool chamber and an orifice. The optimized balance structure of the hydraulic cartridge counterbalance valve, which connects the pilot valve spool and the inner chamber of the main valve spool, enables the oil pressure through the 2 channel ports to form a balance on the pilot valve spool, and the opening of the main valve spool under the force of the pilot mechanism can not be affected by the load pressure fluctuation. AAK hydraulic cartridge counterbalance valve, no load interference, you can also try a small order! https://www.aakindustry.com/info-det , ail/counterbalance-valves-aak456

Chapin is from Canada and has purchased hydraulic cartridge valves in Ningbo for 5 years. At the beginning of this year, their hydraulic cylinder needed hydraulic directional control cartridge valve. He found a hydraulic directional control cartridge valve manufacturer in Ningbo to test the sample, but it was not successful. When the external load of the oil cylinder suddenly changes, the response of the hydraulic direction control cartridge valve is slow, and the shunt accuracy cannot keep up with it, which is not synchronized with the execution of the oil cylinder. According to the feedback from the original manufacturer of the hydraulic directional control cartridge valve, this is the standard model of HydraForce hydraulic directional control cartridge valve. Now the function does not match, so he can only replace it with other model of HydraForce standard parts. Chapin was a little confused. Chapin contacted AAK under the introduction of his friends, and told us the dilemma of the hydraulic directional control cartridge valve sample at present, and asked whether AAK could improve the function of the original hydraulic directional control cartridge valve to match the cylinder execution synchronization? 2 days later, AAK's plan was ready. Chapin paid the development fee the next day and asked for AAK samples. After 40 days, AAK sent the samples of hydraulic directional control cartridge valves. Yesterday, Chapin informed us by email that the test run was successful. After replacing with the AAK hydraulic directional control cartridge valve, the cylinder execution was synchronized and the stability was improved. The prototype has been delivered to the customer. AAK hydraulic directional control cartridge valve has fast response, high shunt accuracy and stability. These 3 advantages are attributed to the optimization of 3 structures based on the original hydraulic directional control cartridge valve. 1. On the main valve sleeve wall of the hydraulic directional control cartridge valve, there are external main oil ports, 2 external load oil ports, locating pins, floating steel balls, and grooves corresponding to the through-hole. The floating steel balls float between the bottom of the locating pins and the grooves. This ensures that the internal load oil port and the external load oil port are always connected, which can realize the static two-way stroke correction of the two load cylinders, and remove the obstacles for synchronization. 2. The spool valve of the hydraulic direction control cartridge valve is sleeved with an inner main oil port and an inner load oil port, and the throttling channel connected with the inner main oil port is on the valve spool. The throttling channel has a fixed orifice and a variable orifice which are connected with each other. The fixed orifice is connected with the inner main oil port. The spool slides back and forth in the spool sleeve to adjust the flow area between the throttle passage and the internal load port. 3. There is also a dynamic variable damping device between the spool and the spool sleeve. When the load suddenly changes, the dynamic variable damping device, under the effect of hydraulic pressure difference, pushes the spool to move, and increases the damping force of the spool when it slides back and forth in the spool sleeve to change the dynamic characteristics of the spool when it slides back and forth in the spool sleeve, reducing the dynamic flow error, and improving the accuracy of diversion. AAK hydraulic directional control cartridge valve, has 1 more function than HydraForce and 3 advantages. You can also try it! https://www.aakindustry.com/info-detail , /directional-control-cartridge-valves- aak531

Bill is a purchaser of Manitowoc company in the United States. Two years ago, AAK received an inquiry about hydraulic counterbalance valves from him, and there were few contacts later. Unexpectedly, two years later, we received an email from him consulting about the problems of the hydraulic counterbalance valves. After communication, we learned that a batch of hydraulic counterbalance valves he purchased elsewhere had problems and almost got into a big trouble. Last summer, a crane shipped by their company, the crane winch system lost control during construction and the hook slipped off. Fortunately, there was no one under the hook at that time, otherwise there would be great trouble. According to the analysis of the field engineer, it is considered that the hydraulic counterbalance valve used in the crane winch system is abnormal. After disassembling the hydraulic counterbalance valve, it is found that there is a deviation in the concentricity between the valve spool and the valve seat. The valve spool is affected by large eccentric hydraulic force, so that the hydraulic counterbalance valve lost its function of balance and the hook slipped off. After knowing the reason, Bill contacted the original hydraulic counterbalance valve supplier. The supplier replied that the hydraulic counterbalance valves were indeed within the warranty period, he can replace the abnormal hydraulic counterbalance valves with a new ones, but can not guarantee that each hydraulic counterbalance valve had the same concentricity and could be used for more than 1 year. Bill was worried about the stability of the new hydraulic counterbalance valves. He didn't want to have big trouble and had to find a new hydraulic counterbalance valve manufacturer. In crane hydraulic system, the performance of hydraulic counterbalance valve is the cornerstone of winch system, and the consistency of hydraulic counterbalance valve concentricity is the key. Bill also asked other hydraulic counterbalance valve manufacturers. No factory guarantees that the concentricity of the hydraulic counterbalance valve can be still consistent after 1 year of use. Bill wants to know how about the concentricity of AAK hydraulic counterbalance valves after being used for 1 year. We told Bill that perhaps having a try is the best answer. He can detect the concentricity of AAK hydraulic counterbalance valves in an all-round way. After 15 days, we sent 4 samples of hydraulic counterbalance valves according to his drawings. Seven days later, Bill informed us that the concentricity test data of AAK hydraulic counterbalance valves were indeed more comprehensive than that of his original manufacturer. How to ensure that the concentricity of AAK hydraulic counterbalance valves is still consistent after 1 year of use? For some manufacturers, when processing the components of hydraulic counterbalance valves, there are discrepancies between the specification parameters and design, the standard of normal distribution cannot be reached, there are certain differences in between the structure of components and the concentricity of grooves, which is difficult to detect. AAK has Mahr cylindricity instrument imported from Germany. Through EasyForm software, it can measure each part accurately and quickly, and obtain the measurement results. With the help of computer, the work piece can be quickly adjusted and aligned to improve the measurement efficiency, ensuring the concentricity of each hydraulic counterbalance valve is 100% consistent to reduce wear. More than half a year later, Bill sent an email saying that another two hydraulic valve manufacturers that he recognized, also provided samples of hydraulic counterbalance valves with AAK together last time. All the hydraulic counterbalance valves were retested after 6 months of use. It was found that the concentricity of the hydraulic counterbalance valves from another two manufacturers changed compared with the data before use, but the concentricity of AAK hydraulic counterbalance valves did not change. The boss asked him to list AAK as the most trusted supplier for their hydraulic counterbalance valves. AAK hydraulic counterbalance valves, are sophisticatedly inspected, can be used without no trouble. You are welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-counterbalance-valves-aak154

Yaroslav from Russia always likes to find new hydraulic cartridge valve manufacturers for trial orders. When encountering problems, he also asks these hydraulic cartridge valve manufacturers to come to me for help and solutions. Considering Yaroslav's 5-year experience of purchasing from AAK hydraulic cartridge valve manufacturer emotionally, I will truthfully provide assistance to these hydraulic cartridge valve manufacturers in the situation of without wasting my emotions. Yesterday, Yaroslav recommended my WeChat account to the owner of a hydraulic cartridge valve manufacturer in Ningbo China, saying that this manufacturer would like to consult me about hydraulic cartridge valve issues. I estimated he has encountered difficulties on the order placed with this hydraulic cartridge valve manufacturer, and approved this owner’s WeChat friend connection request. The communication is as follows: “Are you Kevin? Yaroslav is my client and he asked me to come to you. I would like to discuss some issues with hydraulic cartridge valves with you.". You are asking for help from someone, but the way is so impolite. What is a discussion? My emotions have also come up, so I replied: “I'm Kevin, but I don't understand hydraulic cartridge valves and I can't discuss it with you. Besides, I'm busy right now. ". The other person replied, still tactlessly and condescendingly. “Aren't you a manufacturer of hydraulic cartridge valves? Why don't you understand?” “I just have a rough understanding about hydraulic cartridge valves, and can only echo what the books say. I haven't reached the level of discussing with others yet! ". He still couldn't see that I was politely refusing, and started leaving messages on his own. "I have been a manufacturer of hydraulic cartridge valves for 5 years, and I don't like to produce trial orders, but there are always clients who ask me to produce trial orders, and they are also very picky about some small problems, other manufacturers of hydraulic cartridge valves are unwilling to do..." etc. He said a lot. I only replied with one sentence and deleted the WeChat account of this hydraulic cartridge valve manufacturer. "You are talking about the trial order of hydraulic cartridge valves. Although I am also a manufacturer of hydraulic cartridge valves, my trial order team is as old as you. I have some experience about how to guide a trial order team well, but regarding how to guide a 5-year hydraulic cartridge valve manufacturer, I am a bit rusty after a long time!". At the same time, I also replied to Yaroslav, “This hydraulic cartridge valve manufacturer is very awesome, and my ability cannot help him.” As the saying goes, “Fish begins to stink at the head.”. How can the entire team be good if the owner of a hydraulic cartridge valve manufacturer has such a rude virtue? I would like to provide a suggestion for young hydraulic cartridge valve manufacturers: first learn to be a person, and then think about how to manage the hydraulic cartridge valve team. AAK HYDRAULIC VALVES (621) 2023-07-06 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak621

Smith is the head purchasing of a hydraulic company from California. His purchasing of hydraulic valves in recent years has been smooth. In the last hydraulic valve block order, the parameters were normal when the hydraulic valve block approval sample was tested for the first time, but there was oil leakage in the second test on the hydraulic valve block. After rechecking, the oil leaked again in the third test on the hydraulic valve block. Smith communicated with the hydraulic valve block manufacturer for many times but without results. The manufacturer said that this is the traditional sealing process of hydraulic valve block, Smith should either accept it as is or cancel the order. Smith knew that the delivery date confirmed with the customer was due in 1 month, so it was urgent to find a new hydraulic valve block manufacturer to replace the current one. Smith checked the sealing process of no less than 20 hydraulic valve block manufacturers. They all adopted the traditional sealing method of hexagonal plug combined with and sealing gasket. Smith knew that although this sealing method is simple to operate, it has very high requirements for tightening torque. When the torque parameters are not up to standard, the hydraulic valve block is easy to leak. In order to prevent leakage, some hydraulic valve block manufacturers apply anaerobic glue on the threads. During operation, the particles of anaerobic glue fall into the valve hole, causing oil pollution or valve jamming of the hydraulic valve block. The delivery date is approaching day by day, but the new qualified hydraulic valve block manufacturer has not been found yet. Smith is worried and asks around. His friend Caleb gave him the contact information of AAK hydraulic valve. Caleb is also our hydraulic valve customer in the United States. He suggested Smith contact AAK, and told him that AAK hydraulic valve exports to European and American markets all year round and has some unique R & D processes. Perhaps AAK will be different in the sealing treatment process of hydraulic valve block. Smith directly sent us the hydraulic valve block drawing and required that the traditional sealing technology should not be used. A week later, AAK sent the hydraulic valve block sample successfully. Two weeks later, Smith informed AAK by email that the parameters of AAK hydraulic valve block were fully up to standard after 3 tests, and there was still no leakage after the 4th and 5th tests. Smith is very curious about how the sealing process of AAK hydraulic valve block is different from that of other hydraulic valve manufacturers? The vast majority of hydraulic valve manufacturers fail to seal the hydraulic valve block in place because they stick to the rules in technology. 6 years ago, AAK was eliminated by the customer due to the leakage of the traditional sealing technology of the hydraulic valve block. After that, we decided to adopt the new technology. AAK has introduced new sealing technology and MB Series plugs of KVT company in Switzerland as early as 5 years ago. It mainly forms a solid sealing surface in between the metal parts in the way of expansion, extrusion and bite, so as to 100% avoid oil leakage of the hydraulic valve block, and fundamentally solve the difficulty of high-pressure sealing of the hydraulic valve block. At the same time, the pollution is small and the stability of the hydraulic valve block is stronger. AAK Hydraulic valve block has the sealing technology comparable with Swiss technology, is pollution and leakage free, you are welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-valve-block-aak153

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