Tools & Hardware

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

William is a purchaser of a hydraulic equipment company in the United States. At the beginning of last year, a South American customer wanted to customize a drilling machine for geological exploration. The South American customer promised to order this equipment for a long time if it has excellent performance and stability. The boss asked the engineers to design and test samples. According to the working conditions, the maximum pressure of the hydraulic system is 450bar or above, which has a very high requirement on the pressure resistance and stability of the hydraulic pilot operated pressure control valves. When William received the task of purchasing this hydraulic pilot operated pressure control valve, he felt a big pressure, because the pressure resistance of normal hydraulic pilot operated pressure control valve is basically 250bar, and the maximum pressure resistance provided by previous hydraulic valve manufacturers was also only 380bar. He asked all the hydraulic valve manufacturers that he contacted before, they basically replied that according to this working condition, their hydraulic pilot operated pressure control valve can only ensure a service life of 3 months, but the customer asked for a service life of 1 year. William also contacted the local hydraulic valve manufacturers in the United States. They told him that he could not promise a service life of 1 year for this hydraulic pilot operated pressure control valve. They can only test the samples first, then to know the service life. One of his other hydraulic valve manufacturers in China introduced AAK to him. He told William that AAK shipped a hydraulic pilot operated pressure control valve for a working condition of maximum pressure 450bar before, but the service life required by that customer is 6 months. After receiving the drawings of the hydraulic pilot operated pressure control valve from William, AAK technical team found that the requirements of this hydraulic pilot operated pressure control valve were higher than those of our last shipment. The conventional No. 45 steel could not meet the requirements, so we had to find special steel. Later, after 5 times of material selection and testing, 2 months later, AAK internal sample testing was successful by using a German steel with high wear resistance and high fatigue resistance. After sending the samples of hydraulic pilot operated pressure control valve, we have been waiting for news from William. William said that no news from customer is the best news. Last month, 1 year after AAK samples were sent, William emailed us that he would order 100 hydraulic pilot operated pressure control valves at one time. The quality standard is the same as that of the hydraulic pilot operated pressure control valves sent last year. Because the other hydraulic valve manufacturers in China can only ensure the service life of 3 months, he did not request those manufacturers to make samples, but only asked a hydraulic valve manufacturer in the United States and AAK hydraulic valve to make samples for this hydraulic pilot operated pressure control valve at the same time. The test result from their customer is that the samples of hydraulic pilot operated pressure control valves provided by the hydraulic valve manufacturer in the United States needed to be treated after being used for 12 months, while the condition of AAK sample is still normal after 1 year. Therefore, they choose AAK as the supplier for this hydraulic pilot operated pressure control valve and think it is difficult to find a second one The core of this hydraulic pilot operated pressure control valve is material and heat treatment. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany, combined with carburizing pretreatment process, through secondary quenching + cryogenic treatment + low temperature tempering process, which is cooled to 650 ~ 700 ℃ and discharged after cooling to 450 ~ 500 ℃. The micro hardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times. AAK customized hydraulic pilot operated pressure control valve, is suitable for high pressure working condition and durable, welcome to have a small try! https://www.aakindustry.com/info-detai , l/pressure-control-valves-aak143

A high-precision hydraulic manifold block, has been adjusted by the original manufacturer for many times, the benchmark error of the hydraulic manifold block still cannot be eliminated. AAK took it over under the introduction of old customer, optimized the original processing technology, and added the finishing boring process before the vertical drilling sequence to re calibrate the positioning of the V-shaped block, so that the benchmark error of the hydraulic manifold block was controlled at 0. Tom sent the order of the hydraulic manifold blocks of more than 20000 dollars. Tom is from Holland. They should be the top 3 of the hydraulic companies in Holland. Tom, introduced by his friend Mathias, sent us an inquiry for hydraulic manifold block. After communication, we knew that Tom learned from Mathias that AAK hydraulic technology has changed every year in recent years, and have supplied hydraulic manifold blocks to the world's top 500 companies, so he contacted me. Tom told us the problems with the original hydraulic manifold block manufacturer. Turning Φ 215mm excircle and Φ 88mm inner hole, outer circle center as benchmark, turning Φ 205h8 uses a special fixture, which also uses the outer circle center as the reference for turning. There should be no datum misalignment error, but the hole position is out of tolerance. After 2 days of discussion, AAK hydraulic engineers basically determined that it was caused by the positioning error of V-shaped block in the machining center. Tom was surprised by our analysis and half believed it. I told him that AAK was willing to sample this hydraulic manifold block. If the parameters were not up to standard, the development cost would be refunded. After 30 days, AAK sent 5 hydraulic manifold block samples. 2 months later, Tom sent us the official order for hydraulic valve block of more than 20000 dollars. The reason why AAK can effectively solve the positioning benchmark error is that starting from the production process, it deliberately adds the finishing boring process before the vertical machining sequence drilling to re calibrate the positioning of the V-shaped block. After optimization of AAK hydraulic manifold block: vertical machining center, turntable rotates to 90 ° fine boring φ 88H7 inner hole → drill φ 215mm on cylindrical end face φ 25mm hole allowance → boring φ 25mm hole → rotary table rotates to 0 ° for fine boring φ 110H7 hole → finish milling φ Upper end face of 53mm hole → drill φ On 205mm excircle end face φ 22mm hole allowance → boring φ 22mm hole → rotary table rotates to - 90 ° fine boring φ 88H7 inner hole → drill φ 215mm on cylindrical end face φ 25mm hole allowance → boring φ 25mm hole. The optimized processing technology can reduce the influence of datum movement error to zero, and the positional and vertical accuracy can be better guaranteed. AAK hydraulic manifold block, zero benchmark accuracy error, welcome to try! https://www.aakindustry.com/info-detai , l/hydraulic-manifold-blocks-aak454

AAK hydraulic pilot operated relief valve adopts diamond reamer technology, and the valve hole accuracy of hydraulic relief valve is guaranteed to be within 3μm, the surface roughness reaches Ra0.2-0.4. AAK hydraulic relief valve is sensitive and the valve spool is not stuck. It exceeds 99% of its peers. Nick, who has cooperated for 6 years, still orders back from AAK. Nick is the buyer of John Deere company. He has cooperated with AAK hydraulic valve for more than 6 years. The boss trusts him very much. Recently, a batch of bulldozers they sold to South Africa were complained that the hydraulic system was unable to start. The problem was that the valve body hole roundness of the hydraulic pilot operated relief valve was poor and the valve spool was easy to get stuck. The boss felt very strange. In the past 6 years of cooperation with AAK hydraulic valve, there was no complaint about the hydraulic pilot operated relief valve. After checking, he knew that Nick found a new supplier for this hydraulic pilot operated relief valve, which is 17% cheaper than AAK. The approval samples of hydraulic relief valve provided by the hydraulic valve manufacturer are qualified. Unexpectedly, the accuracy of hydraulic relief valve shipment is uneven. The boss asked Nick to contact AAK hydraulic valve, reproduce the hydraulic relief valves, and ship them directly to South Africa. We were a little surprised when we received an email from Nick to purchase 100 hydraulic relief valves and ship them directly to South Africa. Nick frankly told us that there were problems with the shipments from the original hydraulic relief valve manufacturer and needed the help of AAK to solve the customer complaints together. The difficulty of customer is the difficulty of AAK. We give priority to the production of this batch of hydraulic relief valves. After 35 days, the South African customer of Nick received the replacement of hydraulic pilot operated relief valves, and the whole after-sales process satisfied the customer. Nick sent an inquiry for a new hydraulic relief valve a few days ago. He specially said that his boss asked him to take AAK as the first choice for future hydraulic relief valves, because the quality of AAK hydraulic relief valve has not had any quality complaints in the past 6 years. Comparing the hydraulic relief valves produced by AAK with its peers, it will show why AAK hydraulic relief valve is sensitive and the valve spool is not stuck, which exceeds 99% of its peers. Nick, who has cooperated for 6 years, still orders back from AAK. For the machining of hydraulic relief valve hole, most peers use rigid Boring Reamer or stepped reamer, which has high production efficiency, but the hole accuracy is generally 7μm or above, it is difficult to stabilize on one data, and the roughness is fluctuated at the range of Ra1.6-3.2. AAK uses the diamond reamer to process the valve hole of hydraulic relief valve. In the grinding process, the reamer moves regularly in circumference and axis, and the metal is cut completely without trace with the micro edge of diamond particles. The accuracy of the valve hole of the hydraulic relief valve is guaranteed to be within 3μm, the surface roughness reaches Ra0.2-0.4, which almost avoids the roundness and cylindricity errors of the valve hole, improves the coaxial accuracy, and unifies the accuracy data. AAK hydraulic relief valve is sensitive, and the valve spool is not stuck, exceeding 99%. The 17% more expensive AAK hydraulic relief valve, has its unique valve hole processing, incomparable quality. You are welcome to have a small try. https://www.aakindustry.com/info-detai , l/hydraulic-relief-valves-aak142

This week, we’d like to introduce a hydraulic cartridge relief valve equivalent to SUN RDDA. This Direct-acting relief cartridge is normally closed, pressure-limiting valve used to protect hydraulic components from pressure transients. In October, a customer in Russia found AAK when looking for a hydraulic cartridge valve manufacturer in China on Google. He sent us an inquiry with a list of over 40 model codes equivalent to SUN standard cartridge valves, the qty is 10 pcs each as the trial order. If testing is OK, the annual order will be 500 pcs – 1,000 pcs. 1 week after we sent the quotes, the customer advised that they feel AAK will be a very good fit for them, and they would like to visit AAK factory in November. Last week, customer came to AAK factory and visited the entire production process, from raw material cutting, rough machining, fine machining, accuracy measuring, cleaning, assembling, function testing to packaging etc. The customer was deeply moved by AAK's rigorous operation. During the meeting, customer placed an order of 500 pcs for a hydraulic solenoid cartridge valve equivalent to SUN RDDA, which is really out of our expectation. We learned that previously, they purchased it from another hydraulic cartridge valve manufacturer in Ningbo China, but the function and performance is not stable. They will need AAK to send 10 pcs for testing first and ship the remaining 490 pcs after the testing.   AAK hydraulic cartridge relief valve E-RDDA two advantages: 1. Pressure Rating 350 bar (5000 psi), benchmarking SUN Hydraulics 2. Its service life is 2 times that of its domestic peers Technical parameters of AAK E-RDDA Direct-acting relief valve: Max. Operating Pressure: 350 bar (5000 psi) Flow: 25 gpm Internal Leakage: 10 drops/min. Temperature: - 30 to +100 °C (with Standard Buna N seals) Fluids: Mineral-based fluids with viscosities of 7.4 to 420 cSt. Cavity: T-10A   AAK E-RDDA hydraulic cartridge relief valve, benchmarking SUN RDDA, its service life is 2 times that of its domestic peers. You are welcome to give it a try. AAK HYDRAULIC CARTRIDGE VALVES (729) 2023-12-04 https://www.aakindustry.com/info , -detail/relief-valves-aak729

At the beginning of last year, LIEBHERR customized a high-power and high- pressure excavator for their customer. 6 months later, customer complained about oil leakage. After testing, the engineer found that there was no problem with the hydraulic relief valve. The leakage was concentrated in the auxiliary valve, so it was locked as a sealing problem. After disassembling the hydraulic relief valve, it was found that it was caused by the serious wear of the sealing ring. David was responsible for the purchase of hydraulic valves. After he contacted the original factory of hydraulic relief valve, the manufacturer soon sent a new sealing ring. However, a similar situation occurred again in 2 months, and the sealing ring of hydraulic relief valve was replaced for 3 consecutive cycles. The customer was very dissatisfied with this after-sales service and complained directly to the headquarters. The boss asked David to come up with a thorough solution as soon as possible. David was also surprised why the sealing ring of the hydraulic relief valve had to be replaced in 2 months. The manufacturer informed that the pressure and limit temperature of this equipment are very special, especially for high- frequency operation. The service life of the sealing ring of the hydraulic relief valve can only be guaranteed in 2 months, it has to be replaced every 2 months, no other solution. David contacted many other hydraulic valve manufacturers, most of them said that they could only replace the sealing ring every 2 months, and some also suggested changing the whole hydraulic system assembly of the excavator. After 1 year, David hasn't come up with a new plan yet. The customer is unhappy and the boss keeps pushing him. David browsed AAK website and asked directly by email whether AAK has tips on the sealing ring of hydraulic relief valve or not. After receiving the drawings and working conditions of the hydraulic relief valve from David, we found that the pressure of the hydraulic relief valve is 550bar, the limit temperature is 180 ℃, and it has very high-frequency operation. Even the high temperature resistant fluororubber sealing ring is not suitable for this hydraulic relief valve. After 3 days of thinking, AAK technical team jumped out of the dead end of thinking about the material of the sealing ring. Can we redesign the structure between the sealing ring and the valve? After the test, it was found that adding "Glyd-ring" may solve the sealing problem of the hydraulic relief valve. David asked us to design and make samples of the hydraulic relief valve installed with Glyd-ring as soon as possible. After 30 days, their engineer installed AAK hydraulic relief valve for customer. 2 months later, the customer didn't call to complain. David felt that AAK might have solved the sealing problem of the hydraulic relief valve that had plagued them for more than a year. 6 months later, there was still no leakage. David was relieved finally. The customer recognized this solution, and the boss was also very happy. In particular, their engineers appreciated AAK design ability and quality. AAK newly designed hydraulic relief valve is to open a small groove in the contact section between the valve spool and the valve sleeve to install the dynamic seal of Glyd-ring. Most peers can't think of such installation. Even if they think of it, there may be few factories who can operate the process. Such a sealing system can ensure high-frequency friction. The material has stable performance, the pressure resistance range can be below 600bar, and the temperature range is - 30 ℃ - + 200 ℃. Through the dynamic deformation of the sealing ring, it can ensure 100% sealing and prevent the pressureless liquid leakage. The sealing of AAK hydraulic relief valve, may be thought of by peers, but it may not be possible to do so. There are wonderful tricks in seal design. Welcome to give it a try! https://www.aakindustry.com/

Recently, a new customer of hydraulic cartridge valves from the United States arranged for a QC in their Shanghai office to stay at AAK hydraulic cartridge valve manufacturer workshop for 2 weeks to monitor the sampling process of their new hydraulic cartridge valves. At the beginning, I suggested that there was no need to do so. Going to the cartridge valve manufacturer workshop and staying there for 2 weeks, would not only waste his money and time, but also make the cartridge valve manufacturer's engineers uncomfortable. But the customer doesn't think so and has to arrange someone to come over and monitor the process. Has he ever suffered losses from other hydraulic cartridge valve manufacturers in China before? I'm too embarrassed to ask this question. 2 weeks later, this QC is ready to go back. I had a conversation with him and asked him to talk about his feelings during the past 2 weeks monitoring the sampling process at the AAK hydraulic cartridge valve manufacturer workshop. He just said, "Except for engineers who sometimes don't accept my opinions, everything else, whether I am present or not, is strictly carried out according to the integrated hydraulic cartridge valve sample sheet and processing drawings.” I told him that the engineers of AAK hydraulic cartridge valve manufacturer did not like me to command or supervise their work, and the QC expressed that he did not understand. I shared a small story with him that greatly inspired me. A famous Master in Buddhism Xingyun was asked a sharp question, 'Master, do you secretly eat meat when you are alone?'? Buddhism prohibits eating meat. Master Xingyun did not answer and asked the other person a question, "Can you drive?” The other party said, 'Of course I can.'. “Do you fasten your seat belt while driving?” The other party thought for a moment and said, “why not wear a seat belt?” The master asked him again: Would you wear your seat belt without police supervision? The person remained silent for a moment. At this moment, Master Xingyun said another sentence: If you wear your seat belt for your own safety, what does it have to do with whether the police are present? I practice to give myself peace of mind. What does it matter if someone is around or not? The core of this small story lies in a huge difference between voluntary and passive. Excellent engineers of AAK hydraulic cartridge valve manufacturer work voluntarily and do not need to be supervised, but the engineers from most of the hydraulic cartridge valve manufacturers need to wait for tasks and customer drawings. This QC mentioned that it is not the first time he has followed the sample at a hydraulic cartridge valve manufacturer workshop, but it is the first time he has experienced it at AAK. The excellent engineers of AAK hydraulic cartridge valve manufacturer do not need supervision. If a significant amount of time is spent supervising employees to do things well, not only do I feel tired, the staff are tired, and the Team effectiveness is also low, but most of the hydraulic cartridge valve manufacturers are like this. Cooperating with such hydraulic cartridge valve manufacturers, many processes need to be watched, which wastes time, and also tired. Once you leave one task to the hydraulic cartridge valve manufacturer AAK, and you can proceed with other tasks, no need to monitor any process, no worry, no concern, just peace of mind. AAK HYDRAULIC VALVES (618) 2023-07-02 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak618

Walt placed an order for 1000 hydraulic threaded cartridge valves at one time last week, which surprised me. Three years ago, I met Walt from an American company at the Shanghai PTC exhibition. He communicated with us at our booth for more than half an hour. After the exhibition, Walt sent an email saying that his company happened to have a newly developed hydraulic equipment, which needs to use hydraulic threaded cartridge valves. He asked AAK to urgently provide 30 samples of hydraulic threaded cartridge valves according to his drawings. AAK sent out 30 hydraulic threaded cartridge valves after 25 days. After this, there was no inquiry for any hydraulic threaded cartridge valves from him. Half a year later, Walt sent a new test order of 40pcs for another new hydraulic threaded cartridge valve. Same as last time, there is no further news after delivery. In this way, we just received 2 test orders in about 2 years. I thought that there should be a mistake on the quantity of this large order of hydraulic threaded cartridge valve this time. After several rounds of emails, we know the story for this hydraulic threaded cartridge valve. Their company has only begun to purchase hydraulic valves from China in recent 3 years. For the hydraulic threaded cartridge valves purchased at the beginning, there are always complaints from customers after a period of time, such as leakage or jamming, insensitive opening and closing or serious wear and tear, etc. In the past 2 years, Walt also tried samples from more than 20 hydraulic valve manufacturers. The same problems still occur after each replacement. Only AAK hydraulic threaded cartridge valves have not received a complaint. Walt compared more than 20 suppliers for 2 years, and only AAK hydraulic threaded cartridge valves had no complaints. This time, he strongly suggested his boss that the future hydraulic threaded cartridge valves can only be purchased from AAK. His boss also wants to know why AAK can ensure that there are no complaints about the hydraulic threaded cartridge valves. AAK hydraulic valve not only has the CNC machining center imported from Switzerland, but also has its own upgraded and refitted independent fixtures, which eliminates man-made errors. At the same time, we have accurately controlled every detail of the processing, production, assembly, inspection and packaging of each hydraulic threaded cartridge valve, which has surpassed the vast majority of domestic peers. Firstly, AAK will divide the installed products into several assembly units according to the structure and process characteristics of the hydraulic valve, reduce the single parts entering the general assembly as much as possible, and ensure the reasonable assembly sequence and specified assembly accuracy of the hydraulic valve. All parts will be accurately measured, strictly inspected and tested before and after the general assembly of the hydraulic threaded cartridge valve. Secondly, AAK adopts the matching method for assembly, which will divide the parts into several groups according to the strict size range, and then assemble the corresponding matching parts together to achieve the required assembly accuracy. Finally, after assembly, check whether there is surplus or lack of parts, whether each connecting part is loose and skewed, and whether the residue of sealing belt on cone plug is removed. At the same time, test each hydraulic threaded cartridge valve, including leakage, flexibility, opening and closing performance, etc. AAK hydraulic threaded cartridge valve is free of complaint. Welcome to have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-threaded-cartridge-valves- aak159