Eaton Vickers Hydraulic Directional Valve Suppliers and Manufacturers

AAK uses Rockwell hardness tester to check the hardness of each part of the hydraulic valve, so that the hardness of each heat-treated alloy steel is "exposed". Nearly 90% of domestic hydraulic valve manufacturers are not equipped with this Rockwell hardness tester with the highest accuracy. An Italian hydraulic valve customer, who disliked the expensive price of AAK, purchased the high hardness hydraulic directional valves from another hydraulic valve manufacturer but suffered loss from poor quality, he finally returned to AAK to place an order. Because of the common problem of unstable heat treatment in the industry, the hardness test of hydraulic valves with high requirements for stability is very important. Most hydraulic valve manufacturers can't grasp the details of hardness testing. They don't have high-precision hardness testing instruments, just checking the hardness by experience. They often put on-line production without knowing the hardness of materials is not up to standard due to human errors. Harvey is a hydraulic valve purchaser from Italy. In particular, there are many inquiries for hydraulic directional valves, and the hardness requirements for hydraulic directional valves are particularly high, with few requirements below 65HRC. Since last year, he has sent AAK inquiries for hydraulic directional valves every 2 weeks, all of which are 65-68HRC hardness indicators. Strangely, there were 10 inquiries for hydraulic directional valve, but no order was placed with AAK. Every time we followed, the reply we almost received was "the price is too high and will not be considered for the time being". We realized that this is not our customer. In June this year, Harvey sent an inquiry for the hydraulic directional valve with 68HRC hardness index, which is very similar to the 68HRC hydraulic directional valve inquired last year. We didn't quote the same day and intended to give up. The next day, he emailed again to ask whether his inquiry had been received. We replied that the AAK price doesn't meet your goal. We won't make an offer for the time being. Let's make friends. Harvey probably realized that AAK didn't want to waste time, he told us the truth frankly. There was a problem with the 68HRC hardness hydraulic directional valve he purchased from another hydraulic valve manufacturer. Strangely, the thickness measured in the shipping inspection link was up to standard. After the customer received the shipments of hydraulic directional valve, there were continuous complaints, all of which were due to the instability of the hydraulic system caused by unqualified hardness. From his description, I felt that there was something wrong with the testing instrument and asked him to send samples to us for testing. He was surprised when he learned from the other hydraulic valve manufacturer that there was no test report for 68HRC hardness.

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About THE Product : Blast furnace slag is used in the production of cement (iron Portland and blast furnace cement). Air-cooled blast furnace slag is formed by allowing the molten slag to cool relatively slowly under ambient conditions; final cooling can be accelerated with a water spray. The cooled material is hard and dense, although it can have a vesicular texture with closed pores. After crushing and screening, air-cooled slag can be used in several applications. Granulated slag is formed by quenching molten slag in water to form sand-sized particles of glass. The disordered structure of this glass gives the material moderate hydraulic cementitious properties when very finely ground into granulated blast furnace slag, but if it can access free lime, the granulated blast furnace slag develops strong hydraulic cementitious properties. Pelletized or expanded slag is cooled through a water jet, which leads to rapid steam generation and the development of innumerable vesicles within the slag. The vesicular texture reduces the overall density of the slag and allows for good mechanical binding with hydraulic cement paste. Blast Furance Slag is a nonmetallic co-product which is produced in the process of iron manufacturing, Granulated Blast Furnace Slag is a glassy granular material formed when molten blast furnace slag is rapidly cooled by direct water. Rapid cooling prohibits the formation of crystals and forms glassy, non-metallic, silicates and alumino silicates of calcium. GBFS : (Granulated Blast Furnace Slag) Source : Granulated BF Slag From Gujarat State, India Supply Quantity : 50,000 Metric Tons Per Month Packing: Bulk Parameters (% BY MASS) CaO 30-38 Al2O3 15-20 SiO2 30-40 Glass Content 85-97 MgO 8-11 Fe2O3 0.5-1.5 Moisture 10 MAX Size -5mm Min 95, +5 mm Max 5 Relative Gravity 2.9 Bulk Density(Bagged) 1200 KG/M3

Some time ago, , from a Hydraulic Valve Company in UK, fell in a batch of hydraulic directional valves purchased in Ningbo. There had some email communication between HYDRAULIC VALVE and , but maybe the fate has not yet arrived, we did not cooperate until last month this year. Steven regained his confidence because he had suffered a waterloo and got back a key game here in . At the beginning of this year, a batch of hydraulic directional valves purchased by Steven in Ningbo were stuck and failed during the test run, resulting in the failure of the whole batch of equipment to start up and run. His customer asked UK company to solve it within 30 days, otherwise there will be a big claim. Steven informed the original hydraulic valve manufacturer of these conditions, but the manufacturer prevaricated that it was a problem caused during the assembly process and had no direct relationship with them. Steven also consulted other hydraulic valve manufacturers. They either replied that the hydraulic valve was not produced by them and could not give the corresponding strategy, or there was no reply. Steven received serious rebuff here and there, and feel stressed. When contacted HYDRAULIC VALVE, we were willing to cooperate with him to solve this problem because we felt his trust in HYDRAULIC VALVE. Through his email description, we were still not sure what the problem is, and asked him to send us samples. After HYDRAULIC VALVE received the hydraulic directional valve samples from Steven, we felt that the relative sliding between the middle valve column and the valve body was not smooth. When the whole hydraulic directional valve is disassembled, there are slight scratches on the column surface, the valve body hole has a negative tolerance, and the valve body column hole has plastic distortion. Further microscopic examination showed that the surface of the material was etched badly. It is certain that the original hydraulic valve manufacturer has problems in material selection and heat treatment of alloy steel. Then we informed Steven of the result in a report and attached our suggestions for this style of hydraulic directional valve. After receiving the report, Steven seemed to see hope and asked us to make 5 hydraulic directional valve samples for his customer to run successfully first. After knowing the working conditions of this hydraulic directional valve, we adjusted the material selection of alloy steel, and increased the overall hardness of the hydraulic directional valve by 30% on the original basis. week after Steven received the samples, he informed HYDRAULIC VALVE by e-mail that the hydraulic directional valve samples made by were started up smoothly as soon as they were tested on the machine. When the new delivery date and order quantity were confirmed by his customers, he was finally relieved.

Hydraulic directional control valve troubleshooting, in only half of the time given by Leo, AAK HYDRAULIC VALVE used Fluororubber Sealing Ring and solved the problem of the hydraulic directional control valve troubleshooting that the other hydraulic valve manufacturers have not been able to solve, so that Leo can sleep at ease. This morning, just after reading the emails in the office and preparing for a cup of coffee, my colleague forwarded me an international express. I was a little surprised that there was no parcel notice from any customer, who sent the hydraulic valves to AAK? Will it be a complaint? I haven't met this for several years. I opened the package in fear. There are 5 new hydraulic valves inside. After simple inspection, they should be hydraulic directional valves. Looking at the sending address and person, it turns out that it belongs to the old customer Leo. This guy likes to make this sudden attack. Open the face book and I ask him, these are hydraulic directional valves. What do you need me to do? Leo said, hydraulic directional control valve troubleshooting, can you do it? I'm not good at the hydraulic directional control valve troubleshooting. He didn't reply. I immediately joked that I'm not good at the hydraulic directional control valve troubleshooting, which doesn't mean that AAK HYDRAULIC VALVE is also not good at the hydraulic directional control valve troubleshooting. AAK HYDRAULIC VALVE valve has its own technical team, which can help you on the hydraulic directional control valve troubleshooting. Leo commanded that I have 3 hours to go to bed. Give you 2.5 hours to finish the hydraulic directional control valve troubleshooting. I need to know where the hydraulic directional control valve troubles are and your solutions to the hydraulic directional control valve troubleshooting. After learning about his use scenarios of these hydraulic directional valves and media, I immediately asked AAK HYDRAULIC VALVE technical team to finish the hydraulic directional control valve troubleshooting within 2 hours. The AAK HYDRAULIC VALVE technical team simulated the use scenario of Leo's hydraulic directional valves under the pressurization and flow scenario. The test report came out soon. There were problems with the sealing rings of these hydraulic directional valves. At the same time, we suggested him use Fluororubber sealing ring to seal this hydraulic directional valve. We took 1.5 hours to finish the hydraulic directional control valve troubleshooting, which is just half of the time given by Leo. After learning the result, Leo was relieved and could sleep at ease. The story turned out to be this: Leo purchased some hydraulic directional valves, 30% of the hydraulic directional valves have flow parameter problems. The hydraulic valve manufacturer has not been able to have solutions to the hydraulic directional control valve troubleshooting. The boss is very unhappy.

Last Friday, I received an email from Shikha, an Indian hydraulic directional valve customer. I was depressed all weekend and didn't even want to reply to the email. In July last year, Shikha placed a trial order for a hydraulic directional valve. Three months later, Shikha asked the price of the hydraulic directional valve to be reduced by 40%, on the grounds that the order quantity of the hydraulic directional valve is bigger now. At that time, we only reduced the price by 5%, but Shikha forwarded the email of other manufacturer accepting the price reduction to me. It means that if AAK hydraulic valve can not accept the price reduction, the order will be placed with other hydraulic directional valve manufacturer. It turned out that he tried the order at AAK and another manufacturer at the same time last July. Last week, Shikha contacted AAK again and asked us to accept the same price as last time. I felt that the hydraulic directional valves he purchased from other manufacturer was not smooth, then he turned back to AAK, so we insisted on the original quotation and got his weird email on Friday: "Why does AAK have to make money to make this hydraulic directional valve? Don't many manufacturers in China make a few points of profit?" Indeed, there are hydraulic directional valve manufacturers doing market common products. The only thing they can do is to compete with low price, and then make small moves under table in production. This is the involution of the hydraulic valve industry. AAK does not want to accept such orders for hydraulic directional valves, nor does it want to contact such customers. No matter what enterprise, if it doesn't make money, it can't find its mission, vision and values. If an enterprise deliberately creates its mission, vision and values, it is illogical. If the enterprise doesn't make some money first, where will these things come out of the mind? No matter how small an enterprise is, it may not realize the value of the enterprise until it has a net profit of at least one million yuan. For example, in what aspects has AAK hydraulic valves created value for customers and brought additional benefits to customers, as well as benefits that can not be given by hydraulic valve peers, not to mention the R & D cost of hydraulic valves, production process upgrading cost and equipment renewal cost. On the way of making money continuously, the enterprise's mission, vision and values will be clearer until the enterprise's mission, vision and values are slowly found and what the enterprise really wants to say and do. In the past few years, the conversion rate of AAK online inquiry is 17%. Does this 17% seem not high enough? But AAK never does business for poor enterprises. Our customers are concentrated in European and American brand hydraulics, and their operation is standardized. As long as the quality of your hydraulic valves is stable, it is really easy to discuss the hydraulic valve project, rather than forcing th

HIGINSON company plans to develop a new plunger hydraulic cylinder, which needs to purchase the supporting hydraulic directional control valves. Helen, who had just joined the company, stumbled when purchasing the hydraulic directional control valves. Helen has no hydraulic valve supplier and can only purchase from the original hydraulic valve manufacturer of the company. Half a month later, the engineer and technician of the company installed the hydraulic directional control valves purchased by Helen for commissioning, and the plunger hydraulic cylinder dropped intermittently with vibration and noise. The technician pointed out that the hydraulic directional control valves needed to be replaced. Helen contacted the original manufacturer of hydraulic directional control valve. Per the manufacturer, the delivered hydraulic directional control valves met the requirements of Helen's parameters, and the accuracy also fully met the standard. As a novice, Helen was helpless, and the technician did not specifically say why to replace the hydraulic direction control valves. She tried to contact the new hydraulic directional control valve manufacturer to solve the problem. Helen left a message on AAK website: why is the plunger hydraulic cylinder equipped with hydraulic directional control valve noisy? At this moment, we can't tell the reason. After communicating with Helen, I learned the process of purchasing this hydraulic directional control valve and the judgment of technician in their company. AAK engineers are not 100% sure that where the problem is according to the hydraulic directional control valve drawings sent by Helen, the shipment sample of the original manufacturer and the video of their technician's machine test. We are thinking if Helen, as a novice, has mistaken the type of hydraulic directional control valve? The hydraulic directional control valves can be divided into internal leakage type and external leakage type. Combined with the working conditions, this plunger hydraulic cylinder just reverses the oil outlet chamber, and the back pressure is high. If the internal leakage hydraulic directional control valve is used, there will be abnormal phenomena such as vibration or noise. We told Helen our thinking. She really did not note to the original manufacturer that the hydraulic directional control valve is internal leakage or external leakage. I told her that AAK has ready-made samples of the external leakage hydraulic directional control valve. It is recommended to test the machine with AAK hydraulic directional control valve to see if there is still vibration or abnormal noise. A week later, Helen sent an email saying that AAK hydraulic directional control valve was installed and there was no abnormality in the test run.

The hydraulic directional valves produced by AAK adopts its own proprietary quenching and tempering heat treatment process, which can greatly improve the strength of the hydraulic directional valve, avoid deformation and wear of the hydraulic directional valve in the long-term use process, and significantly increase the service life. Perhaps there is no second comparable manufacturer in Ningbo like this. At most, 10% of the domestic hydraulic valve peers can compete. In order to win orders, 50% of the hydraulic valve manufacturers do not do any heat treatment to the materials for the hydraulic parts. Although some hydraulic valve manufacturers insist on heat treatment, they can only be outsourced processing due to without equipment. There are also 20% of hydraulic valve manufacturers, who do not have a fixed outsourced processing place, so it is impossible to ensure the heat treatment quality, not to mention the stability. Due to these common problems in the hydraulic valve industry, the hydraulic valve will show many problems after being used for a period of time, such as product deformation and wear. Once the hydraulic valve is deformed, it will easily to be blocked and the service life of the hydraulic valve will be greatly shorten. 5 months ago, Mike, a hydraulic valve customer in the United States, came to me. He had been confused, since 2019, there have been continuous customer complaints about the hydraulic directional valve he purchased. All the complaints are that after the hydraulic directional valve has been used for a period of time, some hydraulic directional valves are deformed and some hydraulic directional valves are worn quickly. Obviously, there is a problem with the heat treatment of the materials used in the hydraulic directional valve. Since 2019, due to the environmental protection policy, the domestic heat treatment plants have been vigorously rectified, and there are much fewer processing places. 50% of the hydraulic valve manufacturers do not have a place to do heat treatment to the raw materials. Even if heat treatment is done, 20% of the hydraulic valve manufacturers have to change the processing places for each external processing. I sent him several samples of AAK hydraulic directional valve and told him that the material hardness of our hydraulic directional valve has not changed, which always can reach about 50-55HRC or higher, and there is no problem with the special requirement of 65HRC. He didn't know that the service life of hydraulic valve is our hard index. 3 months ago, Mike issued a test order for the hydraulic directional valve. Each different part of the hydraulic directional valve is marked with different hardness requirements. He also wants to know how AAK ensures the service life of the hydraulic directional valve.

Under the pressure and flow conditions, AAK hydraulic valve effectively controls the sealing ring of each hydraulic valve, so it always ensures that the flow parameters in the hydraulic directional valve system are at the normal value. Only a small detail of the sealing ring has made the reputation of AAK hydraulic valve exceed that of many domestic and foreign peers. I will not modest about this. Many hydraulic valve manufacturers are used to domestic sales and are used to dogmatic production. Maybe they can copy the production process of their peers and continue to use some traditional technologies, but they may be helpless on the details or hidden problems of some spare parts. Leo, an old customer, suddenly sent me 3 samples of hydraulic directional valve some time ago. I didn't receive any email about these samples of hydraulic directional valve in advance. So I thought Leo asked us to offer a quotation. After receiving the hydraulic directional valve samples, I asked him by e-mail how many quantities he needs and what scenario this hydraulic directional valve will be used, then I would give him the plan of this hydraulic directional valve. However, Leo didn't need my quotation, just let me judge the quality of these hydraulic directional valves. Sending samples to let me just see the quality without doing other actions. This was the first time I had met. After testing these hydraulic directional valve samples, AAK HYDRAULIC VALVE technical team found the overall quality was good. The only hidden danger was that the flow parameters of one of the hydraulic directional valves were a little unstable, which should be adjustable in use. I directly told Leo that these hydraulic directional valves were qualified, but he should pay attention to flow adjustment during use. Leo's email reply surprised me again. Leo said that no wonder he stumbled in purchasing these hydraulic directional valves. Even AAK HYDRAULIC VALVE couldn't find problems with these hydraulic directional valves. I angrily asked the technical team to test these hydraulic directional valves again and simulate the use scenario of Leo's hydraulic directional valve under the pressurization and flow scenario. The test report came out soon. There were problems with the sealing rings of these hydraulic directional valves. Leo was relieved when he learned of the result and found the root of the problem. 30% of the hydraulic directional valves he purchased this time had the problem of flow parameters lower than the standard parameter values required by customers. His hydraulic valve manufacturer had been unable to find the root cause of the problem. He never thought it was caused by the mismatch of sealing rings. The traditional nitrile rubber sealing rings were not suitable for hydraulic scenes.

TRM15S series flow sharing control valve Size: 12 Max. pressure: -on the pump side 320 bar -on the actuator side 350 bar Max. inlet flow: 120 L/min Max. flow of directional valve: 100L/min High pressure type Features Sandwich plate design, flexible combination according to demand possible Load pressure compensation, load pressure-indepedent flow distribution Hydraulic pilot control, electric proportional (or switch) control Limitation of system maximum pressure via LS pressure relief valve Small pressure loss, low energy consumption Precise control, good fretting, comfortable handling High repetition accuracy, small hysteresis Fields of application Excavator Loader Forklift Drilling machinery Crane

Recently, I received the second re-order of a hydraulic pressure reducing valve from French client Chinning. I still remember when I first met Chinning in 2020, Chinning purchased hydraulic pressure reducing valves in a hydraulic valve factory and encountered quality complaints from her customers. The hydraulic pressure reducing valve was deformed in less than 3 months, and some valve spools and valve sleeves were seriously worn. More and more customers began to return goods, and the old suppliers did not cooperate with her work. Chinning had a big headache at that time, and the owner kept putting pressure on her to find a hydraulic valve manufacturer with exquisite quality as soon as possible. Chinning did not find a new hydraulic valve manufacturer very smoothly. Because her hydraulic pressure reducing valve had a special use scenario and required high hardness of materials, it was unbearable for ordinary factories. At the same time, under the environmental protection policy of 2019, many previous heat treatment and processing factories were shut down, so the supply supporting system was disrupted, and the heat treatment and processing of many hydraulic valve manufacturers could not keep up. how does AAK ensure the service life of hydraulic valve products We didn't answer directly, but asked her if the hydraulic valves you purchased had the problem of deformation and rapid wear. She also replied quite frankly that she should find a hydraulic valve manufacturer that paid attention to the service life of hydraulic valves in the fastest time. I sent her several samples of hydraulic pressure reducing valve and told her that different parts of our hydraulic pressure reducing valve have different material hardness standards, and some could reach about 50-55HRC or higher. There is even no problem with 65HCR with special requirements. The service life of hydraulic pressure reducing valve is our hard index. More than one week after we sent out the samples of hydraulic pressure reducing valve, we received Chinning's email, including the drawings of hydraulic pressure reducing valve and the hardness requirements for various components. She asked whether we could produce this hydraulic pressure reducing valve? I told her that his hydraulic pressure reducing valve is not difficult, but just the working scene is some special. As long as the heat treatment process is a little unique, it could ensure her requirements. The long service life of hydraulic valve is the most critical.

The hydraulic directional control valve with internal leakage of 2drops/min makes AAK have no peers Oliver comes from a hydraulic equipment company in Canada. At the end of last year, they planned to develop a hydraulic cylinder that uses a hydraulic directional control valve. The parameter requirements are high, especially the internal leakage should be less than 2drops/min. Oliver inquired about more than 10 manufacturers of hydraulic directional control valves. Only one supplier who had cooperated for 5 years told him that he was 90% sure. Other manufacturers surrendered. One month later, the hydraulic directional control valve was installed with the oil cylinder. Less than 12 hours after startup, the hydraulic oil cylinder was unstable during reciprocating motion. After disassembly, the engineer found that the hydraulic directional control valve had internal leakage exceeding the requirement of 2 drops/min. Oliver was very helpless. He continued to look for new manufacturers of hydraulic directional control valves, and they all basically replied that they could not meet the requirement of internal leakage. Oliver found an article on Google, "The internal leakage index is equaled to the local manufacturer in Germany, but AAK hydraulic threaded cartridge valve has better cost performanceâ??, and left a message on our website: can you customize the hydraulic directional control valve with internal leakage of 2drops/min? At first glance, I knew that this was an accurate customer consultation. Although the internal leakage of 2drops/min was difficult, AAK had mass production 1 year ago. We suggested him send us the drawings and working condition requirements of the hydraulic directional control valve, and AAK can make samples directly. If the internal leakage of the hydraulic directional control valve does not meet the standard, 100% of the development cost will be returned. According to the development data provided by Oliver, there may not be any other manufacturer that can provide guarantee except AAK. After 30 days, AAK successfully sent 8 hydraulic directional control valve samples. Three months later, Oliver informed that no abnormality of the hydraulic directional control valve was found during the 3 internal commissioning of his company. After the hydraulic cylinder was tried out by the user, the feedback was also very good. Oliver is curious about the hydraulic directional control valves surrendered by so many manufacturers. Why did AAK samples succeed at one time? AAK hydraulic directional control valve has 3 absolute advantages and has already surpassed its domestic counterparts: 1. The precision honing machine imported from the United States is used to finish the valve hole and valve spool of the hydraulic direction control valves for more than 3 times. The dimensional accuracy of the valve hole is IT7 ~ 4, and the surface roughness can reach Ra 0.32 ~ 0.04�¼m, thus meeting the requirements of high accuracy.