Tools & Hardware

Amador is from a hydraulic equipment company in Bolivia. Some time ago, he encountered problems with a hydraulic cartridge counterbalance valve. A logistics lifting device developed by his company needs to use hydraulic cartridge counterbalance valves. Amador selected a hydraulic cartridge valve manufacturer in Ningbo who has cooperated with him for 2 years to test samples. There was a hidden danger in equipment debugging: when materials rise to a certain height and stay, they will automatically fall down slightly and shake with low frequency. The reason is that the balancing capacity of the hydraulic cartridge counterbalance valve does not match the load. Although the hydraulic cartridge counterbalance valve has no leakage and no abnormal function, it must be optimized. The manufacturer had no idea for optimization and gave up. Amador contacted about more than 10 hydraulic cartridge valve manufacturers, but after a week, it was fruitless. Amistad became very worried. When browsing Google, Amador found an AAK article about AAK unique designed hydraulic cartridge counterbalance valve helped Indian customer solve the hidden danger of hydraulic lifting device. This is very close to his current situation. He left us a message: 1. I paid attention to the personalized design of AAK hydraulic cartridge counterbalance valve, helping Indian customer solve the hidden danger of hydraulic lifting device. 2. Can AAK solve the hidden danger that the balance capacity of the hydraulic cartridge counterbalance valve does not match the load? 3. To customize a hydraulic cartridge counterbalance valve that the balance capacity matching the load, what is the lead time and cost? I guess that he encountered trouble in purchasing hydraulic cartridge counterbalance valves. After communication, I learned the above story. According to the information provided by him, I told him that when the hydraulic cartridge counterbalance valve works, it mainly depends on generating a back pressure balanced with the load. When the load weight is small, the system will produce low-frequency jitter. When the load weight is large, it is easy to have a little leakage, causing the weight materials to fall slightly. This model has different problem from that Indian customer, and solution will be also different. Amador may have seen hope and requested AAK to try samples. After 35 days, AAK sent 12 hydraulic cartridge counterbalance valves. 3 weeks later, Amador informed us by email that with AAK hydraulic cartridge counterbalance valves installed, the equipment was debugged smoothly, and the load did not drop or shake. It will be promoted in the market soon, they are confident to get a large number of bookings. 1. For this hydraulic cartridge counterbalance valve, AAK adopts a cone valve structure and is equipped with a regulating rod, which can adjust the area of the initial orifice to match different flow ranges. 2. It is equipped with a load adaptation mechanism, a strong spring and a weak spring. The two springs are connected together through the spring seat. The weak spring in the low pressure section acts, the spring seat in the high pressure section automatically limits, and the strong spring acts. 3. The valve spool is flexible, controllable and free from load interference. AAK hydraulic cartridge counterbalance valve, no hidden danger and safe, you can have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-counterbalance- valves-aa , k415

As the manager of AAK Hydraulic Valve, I have 5 cards in my hand, which are time, protection, encouragement, reward and punishment. Most of the time, the quality of the card is not important, the player is the core. What a bad hand is also a card. Maybe there is no "smash a good hand", because the biggest card in a hand is the player.   The first card is time. Time can only be given to growers. In the first year of our factory construction, an apprentice came. His qualification was average, but his attitude was very good. Once the blank was bad, he said, give me more time, and I will do better. Half a year later, he was one of the best lathe workers who entered the factory in the same period. The 2 most common dimensions of people are attitude and ability. If I can only choose one, I choose "attitude". Because attitude can make a person take the initiative, have the space to cultivate and have the potential to grow. As long as one person is willing to grow, it is worth giving him time. In AAK Hydraulic Valve, I'm not worried about your ability. I'm only worried about your growth. Giving time to a lazy person who feels good about himself is a wrong deal. The second card is protection. Protecting card can only be given to innovators. The innovation of AAK Hydraulic Valve needs to try and break through. It is inevitable to make mistakes. The protection at this time, is to protect the enthusiasm for innovation, and the possible innovation results. At the beginning of last year, a non-standard high-precision hydraulic valve from a German customer was developed at AAK, our chief engineer fell ill, and this job was temporarily transferred to Engineer Chen. He didn't go home for a week. He stayed in the factory to follow up all the processes, including design, technical transformation, computer operation and testing. Despite several technical improvements, one parameter still failed to meet the standard. Although the customer canceled the trial order, AAK did not criticize and encouraged him to continue the technical transformation, and the cost was paid from the financial expenses. 3 months later, the second sample was sent to the German customer at our cost. The customer not only confirmed all the parameters, but also marveled that AAK Hydraulic Valve did not give up the technical transformation. Whether it's technological transformation or innovation, it's actually not difficult . The most important thing is persistence. Many people find it difficult when they encounter problems, but if they don't try and dare not break through, how about innovation. It is the cornerstone of the development of AAK Hydraulic Valve to protect people who are willing to try innovation and can persevere. The third card is encouragement. Encouragement should be given to those who work hard. When the technicians of AAK Hydraulic Valve encounter technical problems, they can stay at the factory for a week in order to solve problems for customer as quickly as possible. Take a sleeping bag and sleep in the meeting room. In production, it is common for the workshop director not to go home for a week in case of emergencies. Last month, due to the epidemic, a batch of raw materials from Shanghai were not in place in time, and the delivery time of customer order would be delayed by 2 weeks. After the materials were in place, director Wang of the workshop mobilized the technicians to improve the production progress by working in two shifts of 12 hours. He was on duty for 24 hours and dozed off in the workshop for 2 hours when sleepy and worked hard for a week. Although it was still 3 days late, everyone was affirmed, encouraged and had an extra 2-day holiday at the production meeting of AAK Hydraulic Valve at the end of the month. If possible, it's good for you to work harder. People who spend 100% or even 120% of their efforts to do something deserve to be encouraged. The fourth card is a reward, which can only be given to the producer. Applaud for hard work and pay for contribution. AAK Hydraulic Valve is ability oriented, performance oriented and output oriented, and rewards the producers. I told AAK Hydraulic Salve staff that you don't have to think about whether you want to report today or whether you want to have an extra meal with me tomorrow. I don't care. I am more concerned about your performance and output. The reward card can only be given to those who have output. In the second half of the year before last, technician Xiao Wang successfully developed a hydraulic valve, which helped AAK successfully signed a strategic cooperation agreement with a Russian customer, the sales performance in the Russian market doubled year-on-year. At the annual meeting last year, I gave Xiao Wang 25% of the sales profit of this customer. Many colleagues were not surprised at all, because AAK only rewarded those who contributed. The fifth card is punishment. Punishment should be given to violators. Those who violate the values of the process system should be punished. Hydraulic valve manufacturers without punishment will lose the bottom line and principles. We must punish when we should. Especially in the usual output assessment, we should look at two things at the same time: 1. Has the goal been achieved? 2. By what method? The first point is to look at ability and output. The second point is to look at the system and values. If someone violates the system and values, even if the result is good, he should be punished. We have a sales Linda, who is mainly responsible for the Asian market. Her performance goal last year was not only achieved, but also increased by 50%. From the data, it is a good thing. However, as soon as the finance department checked, it was found that her quotation did not comply with the financial regulations. For example, two customers in India were gave different prices for the same purchase demand. Some large quantities of hydraulic valves are quoted to trade orders at the expense of the company's profits. I interviewed her and transferred her to another position. She is no longer in charge of sales. AAK hydraulic valve gives growers time. Protect innovators. Give encouragement to those who work hard. Reward the producers. Punish the violator. https://www.aakindustry.com/info- , detail/hydraulic-valves-aak276

On the weekend, at home, I was reading the book "Pyramid Principles" written by Barbara Minto, who was McKinsey's first female consultant. Suddenly, I thought of a customer's complaint about a new salesman from hydraulic cartridge valve manufacturer AAK a while ago: The email always didn't reach the main point. I know no customer would like such a salesman from hydraulic cartridge valve manufacturers. In the production team of hydraulic cartridge valve manufacturer AAK, there is also such a person who always reports on the production progress like this: Engineer Zhang is busy at home today and will not come to the company. The sealing ring of the hydraulic cartridge valve should have arrived yesterday, but it hasn't arrived yet. There is a device that needs maintenance. Sometimes, after listening around, I don't know what he needs to report. What if feedback is like this? Customer A's PO, the delivery time needs to be delayed by 3 days. The first step in expressing is to prioritize the conclusion. Upon hearing this result, the first reaction was why. So it naturally divides into the first and second steps, and then summarizes what to do. This is also the expression of "summarizing, decomposing and summarizing". The salesmen of hydraulic cartridge valve manufacturers, the structure of their speech is very important, as it helps them express what they want to say clearly to customers. The core of salesman for hydraulic cartridge valve manufacturers lies in reaching consensus in the process of communicating with customers. In fact, each of us is a salesperson. Every day, we need to reach a consensus with others about our own ideas and emotions, which is also equivalent to selling ourselves. To reach a consensus, 3 knowledge points are needed to support it, namely professional knowledge, sales knowledge, and customer knowledge. Professional knowledge is the foundation. If you don't understand the 5 sales aspects of hydraulic cartridge valve manufacturers: materials, equipment, technology, process, and quality control, then in sales, you are basically blindly trying to understand the situation. Sales knowledge is a routine that requires skills. How well the salesperson of hydraulic cartridge valve manufacturers are doing depends on whether they have systematic learning in their sales, as well as their understanding of sales, to bridge the underlying logic of sales. Customer knowledge is based on understanding the customer, and your sales strategy should be popular and appealing to them. The customer knowledge of salesperson from hydraulic cartridge valve manufacturers lies in the sensitivity and agility of sales. Being salesperson of hydraulic cartridge valve manufacturers, with 1 structure expression and 3 knowledge points, which customer doesn't like the salesperson like this? AAK HYDRAULIC CARTRIDGE VALVES (782) 2024-03-03 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak782

Last time, I mentioned that a hydraulic valve colleague received a very big order for hydraulic cartridge valves. In fact, according to his capacity, even in a specific processing process, he was unable to complete the big order, but he still accepted it. These days, there are problems. First, the delivery date is hard to catch up. Second, there are quality complaints about the delivered hydraulic cartridge valves. Now, he is not only faced with claims, but also with lawsuits. In fact, this customer also contacted AAK Hydraulic Valve. I calculated that if I accepted this big order, AAK would need to stop the production for cartridge valve orders of other customers. Although this order is large enough, I still gave up. This also reminds me of a development order for SUN hydraulic cartridge valve 5 years ago. One week after the development was started, I found that AAK could not achieve the accuracy of this model. I resolutely stopped and apologized to the customer. Despite the waste of 1 week, SUN hydraulics still sensed that AAK can correct the mistake as soon as we know it. You and I are ordinary people. To know your mistakes and change them is the most important thing to do after accepting the reality. I think what is being done, if it is wrong, should be stopped as soon as possible. However, most people will speed up their actions after doing something wrong, and then do more wrong things. If they make mistakes, it is more difficult to know and stop loss. There are 2 main reasons: 1. This is too important for me. I can't lose. This is to confuse desire and reality. In the end, we will lose even more. 2. I spent too much effort and money to lose. This is because he did not understand the sunk cost and was kidnapped by the past. In fact, it is not accurate enough to say “correct when you know your mistakes”. Over the years, I have considered that Go, such as AI chess, is not "correct mistakes", but always take the final result as the evaluation standard, and pursue the best hand at present. What is right and wrong? It can only be based on comparison. 1. The ability to evaluate which move is good depends on IQ and foresight; 2. It depends on reason and will to be able to play better chess. Behind the coherence is our illusion of cause and effect, our greed for “there must be rewards for efforts”, our constant dependence on endless time, and our short-sighted vision of the future. Even the best explanation for yourself: 1. "The same thing this time" often becomes the new evidence that "people cannot step into the same river twice"; 2. "This time something different" has become the new evidence of "nothing new under the sun". Hegel said, "The only lesson that mankind has learned from history is that it has not learned any lessons from history." In fact, it is not that people do not accept the lessons, but always feel that those lessons are aimed at other unlucky people, not themselves. The former is normal, and the latter is common sense. People often confuse normal with common sense. For example, if you enter a more fragrant environment, you will not feel fragrant after a while. The new environment is the new normal, and the adaptability of smell is common sense. The reason why it is so difficult to "accept reality and correct mistakes" is that it is "anti human" to do so. Every morning, people wake up from dream and enter a longer daydream. Dreaming is not terrible. It is terrible not to wake up. It is like wearing mutton skewers every moment, integrating the continuity of the past, stringing a lot of accidental strings along the time sequence, editing, color mixing, music, with the title and subtitles. Musk said: I would rather be wrong optimistic than right pessimistic. This may mean to fantasize optimistically, plan pessimistically and implement calmly. AAK Hydraulic Valve is focused on the present. No matter how bad the situation is, it can always find the relatively best hand and firmly go out of that hand. Just like Daimeng in "Mars Rescue", even if you are trapped alone on the remote Mars, the probability of survival is almost zero, and you will divide all the food one by one, and calculate how many potatoes you need to grow. The best hand is also a card, and the worst hand is also a card. Perhaps, there is no "break a good hand", because the biggest card in a hand is the player. AAK Hydraulic Valve can go through mistakes, and change when it knows mistakes, but it never get up to little tricks secretly. https://www.aakindustry.com/info- , detail/cartridge-valves-aak485

I always remember an unusual inquiry email about hydraulic relief valve from Ellenburger, a Russian customer, at the beginning of this year. The email subject was "Don't reply if without ability and confidence", he should have been in trouble at other manufacturers. The content of the email was about testing 20 hydraulic relief valves, with detailed part processing drawings and parameter requirements attached. That was a hydraulic relief valve with high requirements, and the accuracy of valve hole is required to be within 2μM, the material hardness of the valve spool is HRC68, and the surface of the valve body is galvanized nickel alloy, which must withstand high pressure of 450bar. In addition, the durability test of the hydraulic relief valve must pass 2 million times. The requirements in terms of manufacturing quality, function and performance for this hydraulic relief valve is all clearly indicated. After more than 3 hours of discussion by AAK engineers, I replied to Ellenburger that AAK was able to produce this hydraulic relief valve at a development cost of 2,500 US dollars. After the email was sent, there was no reply, and I didn't follow up. Because I believe there are few manufacturers who can make this hydraulic relief valve. For example, in Ningbo, the "hometown of hydraulic valves in China", perhaps only 3 factories have this technical ability. 3 months later, Ellenburger suddenly asked our bank account number. He wanted to pay us to sample the hydraulic relief valve. I was also a little confused. After several rounds of communication, it was learned that the hydraulic relief valve had been developed for half a year, he found more than 20 manufacturers, communicated with more than 300 emails in total, and paid the development cost for 3 times, but all failed, and his mood was extremely bad. Ellenburger said that when he saw AAK reply that we can produce this hydraulic relief valve, his first feeling was that the manufacturer who responded so quickly should not be very good, so he ignored us. He thought that AAK would certainly follow up by email within a week, but to his surprise, AAK didn't send any email for a month, so he began to pay attention to AAK hydraulic valve slowly. In AAK website, he saw the stories between AAK and many customers, and some cases made him admire AAK very much, therefore, he believes that AAK is the ideal manufacturer of his samples this time. I was also moved by him and promised him that if AAK sample failed, I would be willing to return the development fee. At the same time, I also reminded him that if AAK could not get the hydraulic relief valve done successfully, there was no need to find other hydraulic relief valve manufacturers in Ningbo. After 45 days, 20 samples of hydraulic relief valves were sent after passing the internal test. Last week, Ellenburger informed us by email that AAK hydraulic relief valve samples passed the test, and each parameter met the requirements. Although 2 million performance tests have not yet yielded results, he believes there will be no problem, because from the test process, the hydraulic relief valve samples of the other 3 factories are not at the same level as AAK's. For the hydraulic relief valve with high requirements, AAK 3 major advantages are admirable to Ellenburger, and I believe most customers can't achieve it. 1. AAK selects 100Cr2 bearing steel and adopts carbonitriding heat treatment process. It is infiltrated for 13 hours at a high temperature of 820-830 degrees, then oil quenched, cryogenic treatment from -60 degrees to -70 degrees, and tempering treatment from +150 degrees to +160 degrees. The hardness is guaranteed to be HRC68 or above. Wear resistance, high pressure resistance and durability have a good foundation. 2. AAK hydraulic relief valve uses ultra-high hardness diamond reamers for valve hole processing, especially good at hard material grinding, complete grinding, no trace. The accuracy of valve hole is guaranteed to be within 1- 2μm, the surface roughness reaches Ra0.2-0.3, and the coaxial accuracy data is unified. 3.AAK has experienced technicians who have been in the factory for more than 12 years and have 30 years of industry experience. There are specially assigned personnel and special machines, and the operation is flawless. AAK hydraulic relief valve, produced with American materials, Swiss equipment, German knives, and by 30-year technicians, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-relief-valve-aak275

Patrick is the purchasing manager of a hydraulic equipment company in Italy. At the beginning of last year, they sold a batch of shield machines to Portugal, which were complained by customers within half a year. During the operation of the shield machine, the grease pump at the tail of the shield had no pressure. It was found that there was leakage in the hydraulic counterbalance valve of the shield machine. After disassembly, it was found that the fitting clearance between spool and valve hole of hydraulic counterbalance valve was worn. The original hydraulic counterbalance valve manufacturer said that the wear of hydraulic counterbalance valve was caused by the construction environment and pressure requirements of shield machine, and the valve spool of hydraulic counterbalance valve was made of 12L14 steel imported from the United States with good wear resistance, which means there is nothing else he can do. Patrick was helpless, and his engineers were not happy that he found such an irresponsible hydraulic counterbalance valve manufacturer, requiring him to find a manufacturer that has hydraulic counterbalance valves with a service life of more than 2 million times. Patrick contacted more than 20 hydraulic counterbalance valve manufacturers, and AAK also received his drawings. Combined with the working condition information, if the service life of this hydraulic counterbalance valve needs to be more than 2 million times, material selection, processing accuracy, durability testing, these 3 aspects are indispensable. We told Patrick that we could test the sample directly. If the sample failed, we were willing to return the development cost. 2 weeks later, Patrick paid $600 for the development and informed that 3 hydraulic counterbalance valve manufacturers were testing samples at the same time. He would only choose 1 manufacturer as their sole supplier of this hydraulic counterbalance valve. After 45 days, we sent the samples of hydraulic counterbalance valve. 2 months later, Patrick wanted to order 500 hydraulic counterbalance valves at one time. After more than half a year of comparison, AAK hydraulic counterbalance valve was the only one that passed the durability test of 2 million times. His boss was also very happy to find such a manufacturer. Patrick wanted to know how AAK hydraulic counterbalance valve did in terms of material selection, processing accuracy and durability test? By doing 3 points, AAK differs from the peers, but also declares that there are no peers for hydraulic counterbalance valve with a service life of 2 million times. 1. AAK adopts 20CrNi2MoV high carburized bearing steel imported from Germany. Combined with carburizing pretreatment process, 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 microhardness can reach 237 ~ 247 HV, and its wear resistance and fatigue resistance are improved by more than 3 times. 2. The precision honing machine imported from the United States, equipped with diamond reamers, grinds 20CrNi2MoV steel. The grinding is complete and traceless, providing a good guarantee for finishing. 3. The hydraulic counterbalance valve durability test equipment independently developed by AAK meets the NFPA/T2.6.1 standard. It will be warehoused after 2 million times of fatigue test. AAK hydraulic counterbalance valve, German materials, American equipment, more than 2 million times of performance, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-counterbalance-valve-aak274

Some time ago, an Indian customer said that the prices of hydraulic cartridge valve manufacturers in China were getting more and more expensive, while a Türkiye customer said that the quality of hydraulic cartridge valve manufacturers in China was becoming more and more stable. To sum up their comments, China hydraulic cartridge valve manufacturers had good quality and high prices. Their judgment was learned from the hydraulic cartridge valve manufacturers they collaborated with, attributed to finding a suitable hydraulic cartridge valve manufacturer in China. Just in Ningbo, there are over 200 hydraulic cartridge valve manufacturers. I remember Ledi once told me that there are 3 people behind the Ningbo hydraulic cartridge valve manufacturers. Ledi is from the United States and has been in this industry for over 20 years. He has worked in HydraForce, SUN Hydraulics, and HAWE. The 3 people he mentioned are: one brave, one half brave and half cowardly, and one cowardly. He explained it this way: bringing 3 people to the edge of a deep valley, the one being able to jump across is the brave; The one cannot jump across is cowardice. That brave person is ashamed of cowardice and will surely cross the deep valley; The person who is half brave and half cowardly, and the one who is cowardly, cannot cross the deep valley. I roughly understand his meaning. In the face of difficult development or consultation, these hydraulic cartridge valve manufacturers also present these 3 types of performance. I told Ledi, for the person who can jump over, give him ten thousand dollars; for the person who can't jump over, you won't give it. The person who is half brave and half cowardly, because he has received benefits, will definitely be able to jump over; That cowardly person still cannot jump over. If a fierce tiger approached him, the cowardly man would jump up and cross the deep valley without waiting for anyone to tell him. From these scenes, there is no distinction between bravery and cowardice in humans. The key is that the situation drives them, but the question also arises whether the client has time to set the scene, such as finding a tiger or $10,000. If the customer needs to push the hydraulic cartridge valve manufacturer, where does the customer's time come from. But in the procurement process, the time cost is too implicit and expensive. When facing deep valleys, AAK can only cross. For what other hydraulic cartridge valve manufacturers are unwilling to do, AAK is willing to do. For what other hydraulic cartridge valve manufacturers are unable to do, AAK can. AAK HYDRAULIC CARTRIDGE VALVES (662) 2023-09-02 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak662

Yagmur is from Türkiye and mainly purchases hydraulic cartridge valve standard parts from Ningbo. Recently, they developed a hydraulic drilling equipment that uses hydraulic flow control valves that are modeled after HydraForce standard parts, and purchased from a hydraulic valve manufacturer in Ningbo. During equipment debugging, it was found that the flow rate of the hydraulic flow control valve was unstable, and the leakage rate did not match the hydraulic system. The original hydraulic flow control valve manufacturer stated that this is a replica of HydraForce and is unwilling to optimize its function for several hydraulic flow control valve samples. Yagmur checked with several other hydraulic valve manufacturers, but they were not interested. Yamour was very anxious. The original hydraulic flow control valve manufacturer introduced AAK to Yagmur. After communication, it was learned that her requirements for this model include low leakage and high precision requirements for valve holes. Based on the hydraulic system schematic provided by her and the industry model code of the HydraForce hydraulic flow control valve, I recommended a ready-made sample to her. As long as the external dimensions meet his manifold requirements, it can solve the problem she is currently facing. 2 weeks after the sample was sent out, Yagmur informed via email that the drilling equipment was successfully debugged. The low leakage of AAK hydraulic flow control valve meets their system requirements, especially the flow control function that they are very satisfied with. I told her that for this AAK hydraulic flow control valve, we have 3 major advantages: 1. The internal leakage of AAK hydraulic flow control valve is 5 drops/min, while most peers can only achieve 8-10 drops/min. 2. The hole accuracy of AAK hydraulic flow control valve can reach IT6-IT7 level, and the surface roughness can reach Ra0.2-0.025μm. 3.  The AAK hydraulic flow control valve function fully aligns with the standard parts of HydraForce, and there are probably no more than 3 manufacturers in Ningbo to meet it. The vast majority of hydraulic flow control valve manufacturers in the industry do not use forming cutters for machining small quantities of hydraulic flow control valves, but use CNC instead to process according to dimensional requirements. The result of this machining is an accuracy of 0.03mm and a positional tolerance of 0.02mm. The AAK hydraulic flow control valve is processed with forming tools, and the dimensional accuracy of the valve hole after processing reaches 0.01mm, with a positional tolerance within 0.007mm. At the same time, AAK has its own standards for tool selection, with hardness of HRA90 alloy material, heat resistance of 900 ℃, valve hole accuracy of IT6-IT7 level, surface roughness of Ra0.2-0.025μm, and tool life is 30 times higher than ordinary alloy steel. AAK hydraulic flow control valve, has 3 major advantages, and its functions are completely up to standard with HydraForce. You can also give it a try. AAK HYDRAULIC VALVES (566) 2023-04-20 https://www.aakindustry.com/info , -detail/flow-control-valves-aak566

This week, we’d like to introduce a hydraulic pilot-to-close check valve equivalent to SUN COFA, a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. Last October, we received an inquiry from a new customer in the United States for SUN COFA Pilot-to-close check valve. This cartridge valve is not very commonly used, and there are only a few hydraulic cartridge valve manufacturers in Ningbo China that have this model in stock. Per customer, they placed the trial orders with 3 manufacturers, and will do durability testing at the same time. The one who has the best performance in the testing will be their preferred supplier. Last month, we received the good news from the customer that AAK samples passed the durability testing for 2 million times, and the price is in the middle among 3 manufacturers. But the manufacturer who has the lowest price did not pass the durability testing for 2 million times. They will choose AAK their preferred supplier for hydraulic screw-in cartridge valves.   AAK hydraulic pilot-to-close check valve E-COFA two advantages: 1. The function and performance is equivalent to that of SUN COFA 2. Its service life is longer than of its domestic peers Technical parameters of AAK E-COFA hydraulic pilot-to-close check valve: Max. Operating Pressure: 350 bar (5000 psi) Flow: 40 gpm (160 L/min) Internal Leakage: 1 drops/min Cavity: T-2A AAK E-COFA hydraulic pilot-to-close check valve, benchmarking SUN COFA, its service life is 2 times that of its domestic peers. You are welcome to give it a try. AAK HYDRAULIC CARTRIDGE VALVES (783) 2024-03-04 https://www.aakindustry.com/info , -detail/check-valves-aak783

Two-stroke piston ring Product Description A two-stroke piston ring is a crucial component in a two-stroke engine's operation. It sits in a groove around the piston and forms a seal against the cylinder wall, helping to contain the combustion gases within the combustion chamber. This seal is essential for maintaining compression and ensuring efficient engine performance. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 03261 32.00 1.50 1.50 03361 33.00 1.50 1.50 03463 34.00 1.20 1.20 03561 35.00 1.50 1.50 03661 36.00 1.50 1.50 03668 36.51 0.61 0.61 03760 37.00 1.20 1.20 04268 42.00 1.20 1.20 04366 43.50 1.00 1.00

Air compressor piston ring Product Description Dongya purchases a series of steel ring materials from well-known international companies, which can meet the design requirements of various structures and surface treatment piston ring. At the same time, in accordance with the ISO- 6621-3:2000 standard, according to customer needs and engine performance, we independently develop various cast iron ring materials. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 04181 41.00 3.00 3.00 3.00 04281 42.00 2.00 2.00 2.50 04681 46.00 2.50 2.50 4.00 04781 47.00 1.50 1.50 3.00 05081 50.00 2.00 2.00 3.00 05086 50.00 2.50 2.50 4.00 05087 50.80 2.40 2.40 4.76 05281 52.00 3.00 3.00 3.00 05581 55.00 2.00 2.00 3.00

Diesel engine piston ring Product Description DY piston ring surface treatment includes Chromium plating, Nitriding, PCr(CrN), DTC(ta-C), PVD(CrN), DLC(ta-C). With the rapid improvement of modern engine performance, in order to meet the development needs of high combustion pressure, high output power and maintenance-free, Dongya has successfully developed a DLC(Diamond Like Carbon) coating with low friction coefficient, high hardness, high wear resistance and significant tensile cylinder performance after years of professional research. It is currently the world's leading piston ring surface treatment technology, which is recommended that customers give priority to the choice of DLC coated ring group. NO. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 1 03504 35.00 0.80 0.80 2.00 2 03506 35.70 1.00 1.00 1.90 3 03508 35.80 1.00 1.00 2.00 4 03601 36.00 1.00 1.20 1.50 5 03704 37.00 0.80 0.80 1.50 6 03702 37.80 0.80 0.80 2.00 7 03703 37.80 0.80 0.80 1.50 8 03803 38.00 0.80 0.80 1.50 9 03801 38.40 0.80 0.80 1.50

Gasoline engine piston ring Product Description Piston rings are metallic split rings that are attached to the outer diameter of a piston in an internal combustion engine or steam engine. They form a seal between the piston and cylinder wall, which prevents pressurized combustion gases from entering the oil sump and regulate oil consumption by preventing excessive oil from entering the combustion chamber and burning.  NO. PRODUCT CODE CYLINDER DIAMETER(MM) RING HEIGHT (MM) 1ST 2ND OIL 1 06241 62.00 1.50 1.50 2.80 2 06543 65.50 1.20 1.20 2.50 3 07143 71.00 1.00 1.00 1.50 4 07246 72.00 1.20 1.20 2.00 5 07448 74.80 1.50 1.50 3.00 6 08146 81.00 1.20 1.20 2.80 7 08341 83.50 1.20 1.50 2.50 8 08746 87.50 1.20 1.20 2.00 9 08842 88.00 1.20 1.50 2.50

DY Piston Ring Product Description The piston ring is a metal elastic ring with a large outward expansion deformation, which is assembled into the corresponding annular groove of the section. The reciprocating and rotating piston rings rely on the pressure difference of gas or liquid to form a seal between the outer circular surface of the ring, the cylinder, one side of the ring and the ring groove. Scope of Application DY Piston rings are widely used in various power machinery, such as gasoline engines, diesel engines, air compressors, hydraulic equipment, etc. Generally, the piston ring is installed in the ring groove of the piston, and it forms a chamber with the piston, cylinder liner, cylinder head and other components to do work. The function of piston rings includes sealing, regulating oil (oil control), heat conduction (heat transfer), guidance (support) four roles. Sealing: refers to sealing gas, do not let the combustion chamber gas leakage to the crankcase, the gas leakage is controlled at a minimum, improve thermal efficiency. Gas leakage will not only make the power of the engine drop, but also make the oil deteriorate, which is the main task of the gas ring; Regulating oil (oil control): Scrape off the excess lubricating oil on the cylinder wall, and at the same time make a thin oil film on the cylinder wall to ensure the normal lubrication of the cylinder, piston and ring.