Hydraulic Cartridge Valves

At the beginning of this year, received an order from African customer for excavators with a delivery time of 2 months, which means that all accessories must be in place within 1 month, including 600 hydraulic cartridge valves. The production time for the factory is a little more than 2 weeks. The purchaser Peter sent the order information of the hydraulic cartridge valve to all the hydraulic valve manufacturers he contacted before at the first time. More than 20 hydraulic valve manufacturers said that they could not complete the order of the hydraulic cartridge valve in such a short time, and it would take at least 3 - 4 weeks. His supervisor was not satisfied with this delivery time and asked him to find a new hydraulic valve manufacturer. After the email was sent, there was basically no sound. Peter was very helpless and worried. Peter asked Mark for help. HYDRAULIC VALVE to ask if could produce 600 hydraulic cartridge valves in 2 weeks and CC Peter, and joking at the end of the email that if HYDRAULIC VALVE could not complete the hydraulic cartridge valve order, then there is no need to waste time on looking for a new hydraulic valve manufacturer. According to the drawings they sent, technical department found that this was very close to the hydraulic cartridge valve supplied to a Russian customer last year, so the time in the early stage of the production of the hydraulic cartridge valve was saved. After the price of the hydraulic cartridge valve was approved, the process data could be configured on the computer on the same day and the production could be carried out the next day. 2 weeks later, 600 hydraulic cartridge valves were delivered on time, which was the first of all the accessories purchased by Peter to arrive at the company's warehouse. Peter didn't expect that the hydraulic cartridge valve he was most worried about was the first to be completed. Peter appreciated the advice from Mark and was also surprised that could complete this in 2 weeks, while his previous hydraulic valve suppliers needed 3-4 weeks. Mark told : 1. is his most trusted hydraulic valve manufacturer. can surprise him every time when the hydraulic valve order is urgent. 2. has a large amount of data storage and clear classification. For hydraulic valves with relevant data, they can use the most advanced UG / SOLIDWORK software and finite element analysis method to configure process data in 2 hours, which is 3-6 times faster than that of other suppliers. 3. is equipped with advanced machine tools imported from Swiss, coupled with their own modified fixtures, the production speed is accelerated and man-made errors are avoided at the same time. After listening to the introduction realized that only a good hydraulic valve supplier can make his purchasing smooth. successfully completed this urgent order.

Andy is our old hydraulic valve customer in the The hydraulic cartridge valves he purchased from in previous years always has a standard of machining surface roughness around 0.8m. In last year, Andy sent an email to inform us that in the future, the machining surface accuracy of their hydraulic cartridge valves will be improved to within 0.3m. engineers believe that based on the current equipment system, it is very difficult to improve the machining surface accuracy of hydraulic cartridge valves to 0.3 m. It is also very difficult to find such a hydraulic cartridge valve manufacturer I know that has only two options, either give up the business of his hydraulic cartridge valves or accept his accuracy standard. This is the first time I have faced the choice of "standing in line" since I joined the hydraulic valve industry. The cooperation with Andy has always been trustworthy, pleasant and efficient. doesn't want to give up such customers. After two rounds of communication internally, technical team has not reached a consensus. I have to call my retired master and hope to hear his opinions. My master told me that this is a rare opportunity to catch up with and surpass the accuracy of international hydraulic cartridge valves. The roughness of the working surface under 0.3m is rare in , but some European hydraulic cartridge valve manufacturers have this strength. must first start with the equipment, and then select the most experienced operators from the factory for special aircraft training, so as to have the opportunity to compete with those top European hydraulic cartridge valve manufacturers. American HARDINGE precision CNC lathe is worthy of a try. At present, none of the domestic hydraulic cartridge valve manufacturers have this equipment. After contacting the equipment manufacturer, technical team took the hydraulic cartridge valves produced for Andy before to the equipment factory, and asked the engineer of the equipment manufacturer to go directly to the machine for proofing. A week later, we sent the hydraulic cartridge valve samples to Andy and asked them to test the accuracy parameters. Two weeks later, Andy informed that the previous hydraulic cartridge valve accuracy test was completed twice. This time, hydraulic cartridge valve was tested 4 times, and the accuracy fully met the standard. At the same time, he told me that after receiving the accuracy improvement notice, the other 3 domestic hydraulic cartridge valve manufacturers directly gave up, and only dared to test the sample and succeeded in one test. He was very surprised. The machine tool to be introduced by has advantages in accuracy. The parameters of the machine tool: spindle speed up to 6000r/ min, spindle radial run out 0.0008mm, positioning accuracy (X/Z)

Brooke is the purchasing manager of the American company Vickers and has been working with AAK for more than 6 years. One morning last month, he emailed us that his job was finally saved. I was surprised how a veteran suddenly said that he had finally "saved his job". In private, I learned that it was because he had some disagreements with his owner and quarreled. The owner almost let him go. Because his owner is not satisfied with the price of AAK, sometimes the price of AAK for the same hydraulic valve will be more than 20% higher than that of other Chinese hydraulic valve manufacturers. At the cost meeting last month, the owner proposed to replace the Chinese hydraulic valve manufacturer, but Brooke insisted that AAK is the most cost-effective Chinese hydraulic valve manufacturer, so it is not recommended to replace it. On the contrary, he can only leave. The year before last, the owner went to Shanghai PTC exhibition with him to develop suitable Chinese hydraulic valve manufacturers for cooperation. They did get acquainted with many Chinese hydraulic valve manufacturers at the exhibition, but after more than 2 years of testing samples and running in, Brooke found that there is really no second Chinese hydraulic valve manufacturer that can compare with AAK in all aspects. AAK is not only reliable, but also has temperature, whether it is cooperation, delivery, quality, after-sales etc. Brooke remembers the support and help from AAK hydraulic valve over the years. On one occasion, due to the urgent delivery time of a South African customer, Brooke could not find a factory with stock at that time and could only customize it. Most Chinese hydraulic valve manufacturers said that the lead time from sampling to delivery should be at least 2 months. AAK stopped a production line and asked technicians to work overtime to speed up the production. Samples can be produced in 30 days and shipped in 45 days. It is precisely because of the temperature of AAK that Vickers has the opportunity to cooperate with this big customer in South Africa. Every time, AAK products can be successful at one time during testing. They are the best among all Chinese hydraulic valve manufacturers in terms of accuracy, concentricity, fatigue resistance and durability. Brooke's deepest memory is that one time, the South African customer mentioned that the hydraulic valve used for more than 2 years often stuck during work and asked for replacement. After receiving the news, AAK immediately told Brooke to ask the customer to return the goods. After inspection, it turned out that the hydraulic oil used by the South African customer was not clean and caused the problem. Later, AAK disassembled and cleaned the valve and sent it again, and asked the customer to change the hydraulic oil. Until now, no problem has been mentioned. If this happened to other Chinese hydraulic valve manufacturers, their reply must be that this has passed the warranty period.

Nearly 90% of the hydraulic cartridge valve manufacturers in Ningbo can not achieve the filtration accuracy as high as 10 Microns. But AAK is 1 of the less than 10% hydraulic cartridge valve manufacturers with a filtering accuracy up to 10 Microns. Dylan came to AAK HYDRAULIC VALVE with a very special two position two-way hydraulic cartridge valve. I knew he should have encountered a problem. For this special hydraulic cartridge valve, the filtration accuracy of 10 Microns was the minimum requirement. Dylan consulted the existing cooperated hydraulic cartridge valve manufacturers, but none of them could meet the requirement. Most hydraulic cartridge valve manufacturers said that the filtering accuracy of 25 Microns is 100% no problem. Only 1 hydraulic cartridge valve manufacturer gave feedback and was 70% sure that the filtering accuracy could reach 10 Microns. Dylan directly asked me, is it really difficult for these hydraulic cartridge valve manufacturers in Ningbo to achieve the filtering accuracy of 10 microns? How can so many hydraulic cartridge valve manufacturers have said that they can only achieve the filtering accuracy of 25 Microns? I could understand his helplessness and confusion. This is because that the conventional hydraulic cartridge valve manufacturers produce hydraulic valves according to domestic hydraulic standards in China. Not only 1 or 2, but nearly 90% of hydraulic cartridge valve manufacturers, can only able to get the filter element aperture reaches 25�¼m. We AAK HYDRAULIC VALVE also used conventional filters at the beginning, and the filtration accuracy was also based on domestic standards. 3 years ago, a German hydraulic valve customer requested the accuracy requirement of 10 Microns, which was not only a stimulus but also a challenge for us. After more than 2 months of adjusting, we improved the process on the small sample, and adjusted the equipment parameters until it was configured to a high-precision filter and cooperated with AAK special hydraulic oil, so that the filtration accuracy of particles in the hydraulic oil could be controlled to 10m. 1 year later, some hydraulic cartridge valve manufacturers learned that AAK had upgraded with high-precision filters and followed suit. However, due to technical constraints, many hydraulic cartridge valve manufacturers still failed to meet the standard. Under the same working conditions, if the hydraulic cartridge valves from these hydraulic cartridge valve manufacturers have a service life of 2 years, the service life of AAK hydraulic cartridge valves can be extended to 3-4 years. Dylan was surprised that we had mass produced hydraulic cartridge valves with filtration accuracy up to 10 Microns 3 years ago, but only 1 of his current hydraulic cartridge valve manufacturers could do it, and with only 70% sure. Dylan took out the drawings and asked us to send samples of this special hydraulic cartridge valve within 20 days.

Patrick, an old customer in the Netherlands, used to buy our hydraulic cartridge valves. In the first half of the year, he purchased a batch of hydraulic valve blocks from another hydraulic valve manufacturer, but he had received a strange complaint from users in recent weeks. The hydraulic oil deteriorated suddenly. After stopping the machine to check the hydraulic oil, it was found that there were small iron filings inside the oil. After disassembling the whole hydraulic valve, it was found that the valve spool also showed signs of wear. The customer judged that there were iron filings in this batch of hydraulic valve blocks. Patrick discussed with the hydraulic valve block manufacturer about how to deal with this quality complaint. The manufacturer replied that it was the problem of hydraulic oil, not the hydraulic valve block. So this problem was stuck here. Patrick emailed me and asked if I knew this hydraulic valve block manufacturer and whether I could mediate and solve the problem. When I received the drawings of the hydraulic valve block purchased by Patrick this time, I felt that the iron filings probably came from the hydraulic valve block, because the intersecting processing channels of this hydraulic valve block were complex. With Patrick's appeal, I went to the hydraulic valve block factory. The overall feeling of the factory was still good, but the cleaning process before hydraulic valve block packaging did not accord with the process and details in my mind. When I came back, I emailed Patrick. The manufacturer should understand that the problem of iron filings lay with them. However, according to the current iron filings removal process in this factory, even if replenishment, it was difficult to completely avoid iron filings. So he didn't want to reproduce and couldn't solve the problem, he had to perfunctory your demands. Patrick didn't reply to my email for 2 days. When I asked him what else he needed me to do in this matter, he said that he had a big headache these 2 days. The owner asked him to find a new hydraulic valve block manufacturer to replenish part of the hydraulic valve blocks to take care of the customer's dissatisfaction with quality. I reminded him that there were few hydraulic valve manufacturers that could do this type of hydraulic valves with many slender holes. AAK HYDRAULIC VALVE solved a similar problem of iron filings of hydraulic valve block last month, and I sent him the pictures of hydraulic valve block for reference. The next day, Patrick asked us how long it would take to produce 200 hydraulic valve blocks, which was the minimum replenishment quantity required by the customer. When the replenishment order was confirmed, Patrick was relieved. How does AAK hydraulic valve remove iron filings from hydraulic valve block Firstly, the hydraulic valve block is boiled with high-temperature alkaline water to make the iron filings of the hydraulic valve block lose magnetism, and then

AAK HYDRAULIC VALVE Classified the Types of Hydraulic Cartridge Valves from the Perspective of Installation, and Berge Puts Down His Uneasy Heart The types of hydraulic cartridge valves can be classified from different angles. Sometimes, buyers who purchase hydraulic cartridge valves are confused. After all, they are not engineers. In order to classify more simply and intuitively, AAK HYDRAULIC VALVE describes the types of hydraulic cartridge valves from the most extensive installation point of view. In this way, we can divide the hydraulic cartridge valves into 3 types: Insert-type, Slide-in and Screw-in. Berge, an old British hydraulic valve customer, was transferred from the quality control department to the import department. He is a very studious buyer. Maybe it's fate, we often discuss some knowledge points about hydraulic valves. Some time ago, he didn't understand that every time, when the domestic hydraulic valve manufacturers receive an inquiry about his hydraulic cartridge valve, they always ask about the type of hydraulic cartridge valve. The question about the type of hydraulic cartridge valve made him very nervous and helpless. Indeed, there are many types of hydraulic cartridge valves now, from the perspective of function, hole type and scene. We found that they are most commonly classified from the perspective of installation, which is easy to understand and remember. I summarized our hydraulic cartridge valve types to Berge. After reading my following report about the types of the hydraulic cartridge valves, he told me that this classification for the hydraulic cartridge valve types can basically cover more than 80% of the hydraulic cartridge valves. Here, I'll also share with you the types of hydraulic cartridge valves I gave him. Common types of hydraulic cartridge valves are as follows: The Insert-type hydraulic cartridge valves: completely enters the inside of the valve block and does not expose any part outside the valve block. It is positioned by its own thread or other components such as pipe joint, snap ring, retaining ring etc. For example, hydraulic check valve and two-way hydraulic flow regulating valve have this design. The slide-in hydraulic cartridge valves: it does not have installation threads itself, and the valve spool needs to be used together with the cover plate. The valve spool is integrated in the valve block to switch the oil circuit on and off through pressure and spring force. Different cover plates are used to realize direction control, pressure control and flow control. Screw-in hydraulic cartridge valves, that is, hydraulic threaded cartridge valves, have different brands and different hole types, which are usually unable to be interchanged in installation. At present, there are 3 commonly used pass types: ISO7789, SAE and SUN.

Patrick and I know each other at the PTC exhibition in Shanghai. He has worked in HAENCHEN hydraulic equipment company in Germany for a long time. The first thing he said when he saw me was that â??I was attracted by the slogan "Hydraulic valve manufacturer of the world's top 500 companies" on your AAK boothâ??. We talked about the hydraulic threaded cartridge valves for more than half an hour, especially introduced the difference of AAK hydraulic threaded cartridge valves on the specific details. He was surprised that the details of AAK had caught up with his local hydraulic valve manufacturers in Germany. Shortly after the exhibition, Patrick emailed us a hydraulic threaded cartridge valve with high parameter requirements. In particular, the durability of the hydraulic threaded cartridge valve should be more than 2 million times. All quality details should be compared with their local suppliers in Germany. The drawings attached to the email indicate the detailed data and working condition requirements. AAK is required to send 12 hydraulic threaded cartridge valve samples within 4 weeks. After analysis and comparison, AAK engineers found that this hydraulic threaded cartridge valve is not only durable for more than 2 million times, but also has high accuracy requirements. In particular, the internal leakage requirement of hydraulic threaded cartridge valve is 2drops / min, which is 60% higher than the international general standard. Although the requirements are high, we are still confident. 4 weeks later, AAK sent 12 hydraulic threaded cartridge valve samples. A month after the hydraulic threaded cartridge valve samples were sent, Patrick emailed that AAK did make him realize that it was different from other hydraulic valve manufacturers. At that time, he emailed to 4 Chinese hydraulic threaded cartridge valve manufacturers and a local manufacturer in Germany. Two of the 4 Chinese hydraulic valve manufacturers gave up directly. Only AAK and another hydraulic thread cartridge valve manufacturer confirmed to make samples. They tested and compared the sample parameters of the three factories. AAK's accuracy and durability are not only much higher than those of its Chinese counterparts, but also benchmarked with their local manufacturer in Germany. Although the quotation of AAK hydraulic threaded cartridge valve is much higher than that of its Chinese counterparts, it still has advantages over the hydraulic threaded cartridge valve purchased locally in Germany. Purchasing from AAK is the best embodiment of cost performance. AAK hydraulic threaded cartridge valve has three absolute advantages and has already surpassed its domestic counterparts. 1. AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and ensures the first step of accuracy.

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 owner that the future hydraulic threaded cartridge valves can only be purchased from AAK. His owner 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.

Erdmann has been a purchaser of German HAWE company for 5 or 6 years and has been doing very well. Last month, the company had a special hydraulic threaded cartridge valve to purchase. Because it is to be used in the Arctic region, the corrosion resistance of hydraulic threaded cartridge valve needs to be very high. The owner asked him to identify the suppliers and approve the samples within 2 months. Erdmann felt that it could be completed within 20 days. He sent the drawings of hydraulic threaded cartridge valves to the original hydraulic valve manufacturers. Only 2 weeks later, he received samples of hydraulic threaded cartridge valves from one factory. The surface gloss of these samples of hydraulic threaded cartridge valves was quite good. The company tested them on the exploration drilling machine and delivered it quickly to the customer. 3 months later, the customer complained that the hydraulic threaded cartridge valve on the hydraulic pump was seriously corroded, some threads were stuck, the equipment could not be started, and the test run was unsuccessful. The owner thought that Erdmann was careless and ignored the use scene of the Arctic region. The owner again asked him to make new samples and do salt spray test inside the company. Actually, Erdmann emphasized that the hydraulic threaded cartridge valve is to be used in the Arctic region. The original supplier said that their hydraulic threaded cartridge valves have good gloss and corrosion resistance, and can be used in the Arctic region. Erdmann communicated with the original hydraulic threaded cartridge valve supplier again, and the reply was that most hydraulic valve manufacturers just adopt the zinc plating process, and he used the nickel plating process which is the highest level of corrosion resistance. Erdmann realized the difficulty of corrosion resistance in the Arctic regions. Erdmann emailed more than 20 hydraulic valve manufacturers who had been contacted before, emphasizing that the hydraulic threaded cartridge valve must be in the highly corrosive environment in the Arctic region, and the service life shall not be less than 9 months. Only 3 hydraulic valve manufacturers said they could have a try, but there was no response from other manufacturers. Erdmann was a little flustered. Erdmann saw AAK hydraulic valve on Google, who supplied to hydraulic pump company in Russia. He felt that AAK might give him a glimmer of hope. He emailed us to ask if we can produce hydraulic threaded cartridge valves to be used in Arctic regions. We directly replied that the components of the valve should be treated by special electroplating process in order to meet the condition in the Arctic regions. After 20 days, AAK sent samples according to his hydraulic threaded cartridge valve drawings. HAWE company conducted salt spray test on samples from all 4 manufacturers, with the corrosion condition twice that of Arctic regions.