Tools & Hardware

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.

Chernychevsky is from a Russian company specializing in medical hydraulic equipment. Last week, I received an urgent order from him, urgently needing 30 hydraulic pilot operated relief valves. He specially noted that the quality of the hydraulic relief valves should be the same as that of the samples at the end of last year. I was a little surprised because the hydraulic relief valve had no news after the sample was sent last year. Today, it is an urgent order and the quantity is small. Chernychevsky may have realized my surprise. He also frankly told me that besides AAK, another hydraulic relief valve manufacturer also made the samples last year. In the sample stage, both samples passed the test, but the price of AAK hydraulic relief valve was 30% higher, so AAK was not selected. But after receiving the mass production of hydraulic pilot operated relief valve, the trouble began. At the equipment assembly stage, it was found that the precision of the hydraulic pilot operated relief valve was not up to standard, so he had to sort the hydraulic relief valves and install it again. 6 months ago, there were several complaints about inaccurate positioning or weak lifting of the hydraulic lifting system of the equipment. According to the original hydraulic relief valve manufacturer, the hole accuracy of this hydraulic relief valve is IT7 ~ 4. This tolerance requirement makes it difficult to ensure that each hydraulic relief valve has no error and can only be replaced those ones. But after 3 months, the hydraulic pilot operated relief valve still leaked. After the boss knew it, he criticized his hasty purchasing behavior and was very disappointed with him. Chernychevsky realized the seriousness of the problem and could only replace with AAK hydraulic relief valves, because he had cooperated with AAK for 3 years and had never been complained. He regretted not choosing AAK hydraulic valve for the sake of 30% price difference. After the 30 samples of AAK were sent, he privately told me that he would no longer worry about the boss' looks. He was in a good mood and relaxed. AAK hydraulic relief valve is 100% qualified with high precision. It depends on the following 3 points, which few factories can achieve: 1. The imported precision honing machine is operated by a specially assigned person to ensure the precision machining of the hydraulic pilot operated relief valve hole. After honing, the accuracy of the hydraulic relief valve hole is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04 μM. 2. After processing, the Mahr cylindricity meter imported from Germany is used to accurately measure each part through EasyForm software to obtain the measurement results. At the same time, the workpiece can be quickly adjusted and aligned to improve the measurement efficiency. Ensure the concentricity of each hydraulic pilot operated relief valve is 100% consistent. 3. After installation, pressure test should be conducted for each valve before packaging. During the whole manufacturing process, the process should be strictly followed and the details should be carefully checked to ensure that each hydraulic pilot operated relief valve is qualified before shipment. AAK hydraulic pilot operated relief valve, you can rest assured of accuracy, and have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-pilot-operated-relief-valves- aak27 , 3

Connor is from a Canadian agricultural machinery equipment company, mainly responsible for purchasing hydraulic components. In the second half of last year, the sales of one of their rotary tillers were poor. Users reported that the equipment was insensitive and inefficient, and the fuel consumption was 10% higher than that of the same type of equipment. The boss realized that there were hidden dangers in the hydraulic manifolds and asked the engineers to check the causes. However, more than 1 month had passed and there was no practicable plan. The boss was worried and asked Connor to contact the original hydraulic manifold manufacturer to see if they could provide technical support, but they were only good at producing hydraulic manifolds according to the drawings. Connor also asked all his manufacturers of hydraulic components, but none of them gave a plan. When Connor reported these to his boss, he could only helplessly look at his boss shaking his head. Connor browsed AAK website, saw the display and introduction of hydraulic manifolds, and left a message: what is the relationship between hydraulic equipment with high energy consumption and slow response and hydraulic manifolds? I understood that Connor had a problem with hydraulic manifolds, but it was difficult to answer. After several communications, I learned that his boss was worried, and Connor wanted to solve the problem that had plagued his company for nearly 3 months. According to the hydraulic manifold drawings and the video of rotary tiller work sent by Connor, AAK engineers had discussion. The probability was that the hydraulic manifold design had hidden problems. From the analysis of hydraulic manifold and system schematic diagram, there were certain energy conflicts between the design of some oil circuits and the selection of hydraulic valves. AAK could redesign the hydraulic manifold to match their equipment. Connor also readily paid the development cost. 1 month later, AAK sent the hydraulic manifold samples. 2 months later, Connor said that after their rotary tiller was installed with AAK hydraulic manifolds, it was responsive during operation. The operation was more than 20% higher than before, and the fuel consumption was also reduced by 20%. The customer feedback was good, and more and more customers came to try it out. Connor told me privately that he had seen his boss's long lost smile. The boss paid more and more attention to him. He will be promoted to the management next month. AAK hydraulic manifold has 3 advantages, and there may not be a second one in Ningbo. 1. AAK engineers have experience in hydraulic manifold design, especially in oil circuit design. Ensure flow distribution as required, eliminate bypass throttling loss and reduce energy loss. The sensitive oil circuit control makes the equipment easy to control, sensitive and efficient. 2. Hydraulic manifold material selection and proportioning. The material selection of each component from the valve block to the valve is based on the working conditions. The selection and allocation of all valves in the manifolds must comply with the energy principle under the condition that the system principle is met, without robbing energy or wasting energy. Without more than 10 years' experience in hydraulic manifolds, it is difficult to master its essence. 3. We make good use of MDTools software to design hydraulic manifolds. From circuit logic to the functionality of each valve, we can do personalized design and customized production of non-standard hydraulic manifolds. AAK hydraulic manifold makes the equipment flexible, energy-saving and efficient. You can also have a try! https://www.aakindustry.com/info-detai , l/hydraulic-manifolds-aak272

Castel is from Saudi Arabia, and their company mainly sells oil mining machinery. At the beginning of last year, one of their hydraulic platforms was complained, and the equipment went on strike 8 - 9 months later. After checking, it was found that the shoulder and pin hole of the hydraulic cartridge needle valve spool in the system were broken. The hydraulic cartridge needle valve manufacturer advised that the same model of hydraulic cartridge needle valve was supplied to the South American market. Within 1 year, there was no complaint. The manufacturer explained that the brittle fracture of the hydraulic cartridge needle valve spool was caused by the working conditions and working scenarios. The boss was not satisfied with the manufacturer's buck passing, and asked Castel to found a manufacturer whose hydraulic cartridge needle valve can be used for more than 1 year. Based on the requirement of "hydraulic cartridge needle valve can be used in desert with a service life of more than 1 year", Castel started to look for new cartridge valve manufacturers. After 1 week, there was no result. Castel was a little flustered. Castel noticed the article published by AAK in B2B that "AAK hydraulic counterbalance valves have been used in Sandstorm for 12 months, was free of corrosion”, he emailed us to ask if AAK can customize the hydraulic cartridge needle valves used in desert with a service life of more than 1 year. After communication, we learned that he had trouble in purchasing hydraulic cartridge needle valves. The durability of the hydraulic cartridge needle valve is related to the material, but the structure can not be ignored, especially for the complex working conditions, it should be designed specifically. Castel may have seen hope, and asked AAK to make 20 samples of hydraulic cartridge needle valves. After 45 days, AAK delivered the trial order. After the hydraulic cartridge needle valves were sent out for 2 months, there was no information from Castel. I followed up curiously, and he said that the boss would not reply until 1 year later, then there was no information anymore. I almost forgot about Castel. Until last week, he emailed us an order for 600 hydraulic cartridge needle valves, and specially emphasized that the second batch of hydraulic cartridge needle valves should be of the same quality as the trial order, not the best, but should not fluctuate. I agree with that. It's not the best quality, but the stable quality with few failures. Some small faults can be solved as soon as possible, but they are very troublesome if happen again and again. The quality should be reliable, and will not require repair for a year or even longer. Castel said that AAK hydraulic cartridge needle valves can be used for 18 months. Although the price is a little more expensive than the original hydraulic cartridge valve manufacturer, the service life is twice that of the original manufacturer. The sticking point of AAK hydraulic valve is the stability of function and reliability of performance. This hydraulic cartridge needle valve focuses on 3 points: 1. The shoulder of the hydraulic cartridge needle valve spool is increased to the circular radius, which effectively reduces the shoulder stress of the spool and improves the service life of the spool. 2. The pin hole setting is optimized to reduce the alternating influence of the load change on the valve spool stress. 3. The cantilever beam of the wedge structure of the hydraulic cartridge needle valve is changed into a simply supported beam, which increases the stability of the valve spool and can play an anti vibration role to a certain extent. AAK hydraulic cartridge needle valve, safe for 18 months, you can also have a small try! https://www.aakindustry.com/info-detai , l/cartridge-needle-valves-aak414

A customer asked me, is AAK Hydraulic Valve tweeting for flow? AAK Hydraulic Valve is not for traffic, but for trust. The rain is so heavy that it does not moisten the grass without roots. Although the rain is heavy, if there is no root to absorb the rain and dew, the grass and trees will not only be moisturized, but may also be submerged. What AAK Hydraulic Valve needs to do is not to ask how much rain it can rain, but to focus on its own water absorption root.   Ask how much it can rain, which means how much traffic it can have. What is traffic? In the Google search, enter the hydraulic valve manufacturer, and the customers of the hydraulic valves brush it again and again, which is the traffic. There are also many ways to engage in traffic, such as keywords setting, optimization of advertising, return on investment, click cost, display cost, etc. The core is: the higher the price, the better. The price keeps rising until the "flow dividend" disappears. The rain finally became a high- priced tap water that paid for when it was used and stopped when it was not paid.   What should I do? I began to ask, what is the foothold of AAK Hydraulic Valve? AAK Hydraulic Valve attracts new customers with trust, and win the repurchase rate with manufacturing quality. These are the two legs of AAK Hydraulic Valve.   But what about the repurchase rate? In the past, without the Internet, how did AAK Hydraulic Valve at the end of the street come to today step by step? That's because people who have bought AAK hydraulic valves think it's good. They can't help buying it next time. This is the "repurchase rate". One day, when a people heard that a friend needed a hydraulic valve, he could not help recommending AAK. This is the "recommendation rate". The recommended person, because of the good experience, will generate new repurchase rate and recommendation rate, and then the recommended person follows the way. Finally, the re-purchase rate and recommendation rate are rising, and the return rate is getting lower and lower. The name AAK has become a root that can absorb water. But if you really want to have a root that can absorb water, it is not enough to have only repurchase rate and recommendation rate. The most important thing is trust.   What is trust? To purchase hydraulic valve, click search engine in Google search. Guess whether he will input "hydraulic valves, hydraulic valve manufacturers, China hydraulic valve manufacturers" or "AAK hydraulic valves"? This difference is huge. If he is searching for "hydraulic valves", then guess whether the money you spend is the highest bidding price under this keyword. If he searches for "AAK hydraulic valves", then at this time, the natural search results are almost only AAK. So you don't have to participate in the auction at all. Pick and choose, or you. This is trust. Finally, everyone began to realize that the brand building that seemed to be a waste of money is not only worthless, but also directly determines your life and death. When consumers look for "AAK hydraulic valves", you are born. If consumers only look for "hydraulic valves" forever, you will almost die. What's more interesting is that the more sellers who know how to search for keywords, the more they like business flow, the more they will benefit from business flow, and the more they will ignore whether they have water absorption roots. Finally, it is swallowed by traffic.   AAK Hydraulic Valve walks on two legs, focusing on its own water absorption root. https://www.aakindustry.com/info- , detail/hydraulic-valve-manufacturers-aak484

Eustace is from Greece and is still in the probationary period. He almost switched jobs due to a hydraulic cartridge relief valve that has high requirement on roughness. At the beginning of this year, their customer customized a hydraulic manifold, and all hydraulic cartridge valves needed to be purchased by Eustace, except for hydraulic cartridge relief valves. Everything else went smoothly. The original manufacturer sent samples 3 times, but the roughness of the surface of the hydraulic cartridge relief valve spool and cage still cannot meet the requirements of Ra0.1. Eustace was complained about several times by their chief engineer due to delays in procurement time. Eustace left a message on AAK website: Can the roughness of the surface of the hydraulic cartridge relief valve spool and cage be controlled within Ra0.1? After communication, we learned that the original hydraulic cartridge relief valve manufacturer failed for 3 times, which made him very helpless. I told him that the design of their hydraulic manifold requires high precision for the hydraulic cartridge relief valve. If the roughness is not solved properly, the valve spool is prone to jamming. AAK cannot guarantee that the roughness of each processed product is within Ra0.1, but the hydraulic cartridge relief valves to be in the customer's hands must meet the standard. After 35 days, AAK sent out 10 samples. 1 month later, Eustace informed us via email that their hydraulic manifold had been approved by the customer. Before the hydraulic manifold assembly, their technicians tested each hydraulic cartridge relief valve sent by AAK, and its roughness was within Ra0.1. The roughness of the AAK hydraulic cartridge relief valve spool and cage can be controlled within Ra0.1, with precision machining as the core and detection as the key. AAK uses Japan Mitutoyo roughness measuring instrument to check, and a dedicated person is responsible for it. The advantages of this measuring instrument are large measurement range and high accuracy. We do this by first placing the valve spool or cage on a testing glass platform, and the device will directly capture high-definition images. At the same time, when the contact needle scratches the tested surface of the valve spool and cage, although the surface contour fluctuates between peaks and valleys, the contact needle can vibrate up and down along the peaks and valleys, and at the same frequency, the signal is amplified by more than 10 times through an electronic device, and then transmitted to the computer to form data or dynamic images. With this big killer, the roughness Ra0.1 is not difficult. Most hydraulic cartridge valve manufacturers in China do not necessarily have this equipment for detecting roughness, or it may not be 100% full inspection. AAK hydraulic cartridge relief valve, high precision, no jamming, you can give it a try! AAK HYDRAULIC CARTRIDGE VALVES (661) 2023-08-31 https://www.aakindustry.com/info , -detail/cartridge-relief-valves-aak661

The quality of the team of hydraulic cartridge valve manufacturers determines how far they can go. Hydraulic cartridge valve manufacturer AAK has fired two salespeople since the beginning of the year, and they are always able to find reasonable reasons for their inaction and lack of effort. The team of hydraulic cartridge valve manufacturers always has a few people with low cognition. Every time when you communicate with them, you can only sigh that "mud cannot support the wall.". For those who with insufficient cognition, everything you say is in vain. Everyone is paying for their own cognition. If cognition is not at the same level, there is no need to conquer each other. In the world of adults, there is only screening and no education, only selection and no change. If you awaken others, it will only harm your own fortune. Short sighted people lack experience, things they haven't seen, things they haven't experienced, of course they don't believe. This Spring Festival, Ningbo is very cold. I told the child that I can go from winter to summer within 2 hours, but he said it's impossible. I told him to just take a plane. If the child doesn't know about airplanes, how can he understand? People with lower cognition tend to feel more correct and stubborn. There are many small hydraulic cartridge valve manufacturers in Ningbo China, and in their cognition, they think that they only make standard hydraulic cartridge valve parts for retail or wholesale to sell for money. Hydraulic cartridge valve manufacturers with low awareness believe that success is simple, while hydraulic cartridge valve manufacturers with high awareness know that success is difficult, and behind it lies a huge cost and effort. If the manufacturer of hydraulic cartridge valves is not well aware, even if they earn a little money by luck, they will still lose out entirely based on their strength. Manufacturers of hydraulic cartridge valves with low cognitive abilities do things completely according to their own habits, regardless of customer requirements or suggestions. No matter what kind of "golden ideas" he receives, these hydraulic cartridge valve manufacturers don't even want to take a think about it, they just reject them all! Hydraulic cartridge valve manufacturer AAK believes in luck very much. On the road of life, whether you run or read, your body and mind must always be on the road. With such persistence, your luck is likely to get better and better. Reading ten thousand books is not as good as traveling a thousand miles, traveling a thousand miles is not as good as reading countless people, reading countless people is not as good as celebrity guidance, and celebrity guidance is not as good as self realization. In the end, if the hydraulic cartridge valve manufacturer encounters a benefactor, a demanding and meticulous customer, and colleagues are willing to enlighten, then what are the hydraulic plug valve manufacturers worried about? Some hydraulic cartridge valve manufacturers have many scattered customers, but no matter how many customers you have, if they are all at the same level and level of understanding as you, then the hydraulic cartridge valve manufacturers will not make any progress. Only by stepping out of the comfort zone, finding customers with higher recognition than you, and using your sincerity to impress others, and the others are willing to enlighten you and take you to play, can hydraulic cartridge valve manufacturers elevate to a higher level. These are also what hydraulic cartridge valve manufacturer AAK has been doing in recent years. When hydraulic cartridge valve manufacturer AAK rises to a higher level, AAK needs to think carefully: how can they stand up in this circle? That, of course, is a continuous improvement in our own manufacturing quality. Hydraulic cartridge valve manufacturer AAK has gained recognition and guaranteed manufacturing quality. We still respect every customer who values excellence. AAK HYDRAULIC CARTRIDGE VALVES (781) 2024-03-03 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak781

Leo from Germany, who had been successful in the purchase of hydraulic valves, recently lost confidence in an order for hydraulic relief valves. During the test phase, when the pressure of the hydraulic relief valve sample is below 250bar, the system operates normally. Once it exceeds 250bar, the hydraulic relief valve will leak oil and the pressure will be unstable. After several debugging by their professional technicians, the oil will still leak when the pressure is high. After disassembling the hydraulic relief valves, no abnormality was found, but the O-ring was slightly scratched or the position was slightly offset, which may be the cause of oil leakage. The original hydraulic pressure relief valve manufacturer said that the O-ring material is synthetic rubber with the best anti-aging and oil resistance. It is the most suitable medium for this working condition. The assembly is also completed by 5 years of skilled workers. More new samples of hydraulic relief valves were tested, but they still leaks when the pressure is high. Leo believes that the O-ring seal of the hydraulic relief valve is improperly assembled, so it is urgent to find a reliable hydraulic relief valve manufacturer to re-produce it, otherwise there is a risk of shipping by air. Leo contacted more than 10 factories in 3 days, but none of them guaranteed that the sealing ring will be 100% free of displacement and scratches after assembly. The customer has been pushing for the progress of the approval samples, but Leo hasn't even determined the manufacturer. How can he take it easy? Leo started to look for new hydraulic relief valve manufacturers on Google, and noticed AAK hydraulic valve. He left a message to us: how should the synthetic rubber O-ring be assembled to make sure that there is no displacement or scratch? At the same time, it needs to make sure that when the pressure is above 250bar, the hydraulic relief valve does not leak oil, and the pressure is still stable. I told him that the disadvantage of the synthetic rubber sealing ring is that it is easy to deform under strong force, and not installed in place. As soon as the pressure is high, it will leak oil. Leo immediately sent the drawing of the hydraulic relief valve to AAK to make samples. Because we have the existing procedures for this hydraulic relief valve, 7 days later, the samples of the hydraulic relief valve were sent. 2 weeks later, Leo told me that AAK hydraulic relief valve had no oil leakage when it was pressurized to 300bar and tested continuously for 3 days. Most of hydraulic relief valve manufacturers install the sealing ring by directly pressing it with clamps. AAK suffered similar complaints 5 years ago. We have been skilled in and improved the installation process of O-ring 3 years ago. Apply lubricant to the long shaft of the valve first to ensure that the O- ring slides without resistance. When passes through the external thread, we will use the metal guide sleeve to guide it into the O-ring groove instead of forcing it in. After the O-ring is put into the groove and the O-ring is restored to 100%, check the gap to ensure that there is no displacement or scratch, and then install it into the valve body. When it is installed in the valve body, it should also be coated with lubricant to rotate and insert slowly, and the O-ring will not be affected. Yesterday, Leo sent a photo of him in the bar and told me that this was the most relaxing time in the past month for him. AAK hydraulic relief valve, O-ring is assembled with unique skills, no oil leakage, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-relief-valve-aak271

Manator is from Indonesia and has been engaged in the procurement of hydraulic components for 2 years. At the beginning of last year, the hydraulic power unit they sold for deep-sea oil drilling was complained of as abnormal by customers 6 months later. The root cause is severe corrosion on the surface of the hydraulic cartridge valve in the hydraulic system, leading to dysfunction of the hydraulic cartridge valve. Manator was very confused because the valves sold to other markets from the same batch production has no complaint for over 1 year. The original hydraulic cartridge valve manufacturer stated that the corrosion in deep sea is severe, and the only solution is to replace the corrosive valves with new ones, and the service life can be only guaranteed for 6 months or less. The 6-month frequency of after-sales service not only results in high costs but also dissatisfaction from customers. The boss requested him to purchase hydraulic cartridge valves with a service life of more than 12 months to replace those corroded hydraulic cartridge valves. After sourcing for 1 week, but still without any results, the customer pushed for after-sales solutions several times, Manator was in a hurry. Manator left a message on AAK hydraulic cartridge valve website: Is the service life of AAK hydraulic cartridge valves guaranteed to be more than 1 year in deep-sea environments? I did not directly answer his question, but only sent him a case of a customized hydraulic flow control valve for a Brazilian customer: "AAK hydraulic flow control valves were still normal after being used for 15 months near the sea, while that of the peers corroded after 10 months.” Manator requested me to sample the hydraulic cartridge valves based on his drawings, and requested me to finish it as soon as possible to replace the hydraulic cartridge valves complained by customers. 45 days later, AAK sent out 40 hydraulic cartridge valves. After Manator received samples of AAK hydraulic cartridge valves, he just told us: AAK hydraulic cartridge valves can be used in their power unit, and their functions are consistent. Then, he didn't reply to my follow-up email. Last week, Manator sent an email with a repeat order for 200 hydraulic cartridge valves, informing us that his customer is very satisfied with this after-sales service. After replacing with AAK hydraulic cartridge valves, a year has passed and the hydraulic cartridge valves have no corrosion or abnormal function. They only trust AAK for hydraulic cartridge valves used in marine conditions in the future. The key of this hydraulic cartridge valve is its corrosion resistance, which is not difficult for AAK. 1. The selection of materials for hydraulic cartridge valves, with the valve body made of 3Cr3Mo3W2V hot working die steel, has a corrosion resistance of over 30% better than other steels. Although the material cost is over 30%, it is still the preferred material for AAK. 2. The surface treatment of the material adopts a zinc nickel alloy coating, and the coating thickness is controlled between 10-15μm. Compared to conventional zinc coatings, the corrosion resistance is more than 3 times higher. 3. AAK has a SH-90 salt spray testing machine for anti-corrosion testing of materials, which tests the valve body according to the GB/T2423.17 testing standard. Ensure that the anti-corrosion of any surface of the valve body meets the standard, and also ensure that there is no red rust after a neutral salt spray test for more than 1,500 hours. AAK hydraulic cartridge valve, is safe to use in the ocean, you can also give it a try! AAK HYDRAULIC CARTRIDGE VALVES (565) 2023-04-18 https://www.aakindustry.com/info , -detail/cartridge-valves-aak565