Tools & Hardware

Laird is from Brazil, and we met 2 years ago. He conducted 6 inquiries, 3 trial orders, and 1 trial order for hydraulic directional control valves with AAK. But there has been no inquiry in the past 6 months, which surprised me. I have checked with him twice but there has been no response. It wasn't until Laird contacted me a few days ago that I learned about the sealing story of the hydraulic directional control valve cover cap and valve cage. In the second half of last year, their hydraulic power unit required hydraulic directional control valves. Laird inquired from 3 hydraulic directional control valve manufacturers in China, and AAK also provided quote. Laird chose a hydraulic directional control valve manufacturer with competitive price. 6 months later, the customer complained about hydraulic directional control valve leakage, causing unstable system operation. On site, it was found that the leakage point was between the hydraulic directional control valve cover and valve cage. The original valve manufacturer claimed that it was caused by severe vibration and he could only guarantee the service life of the hydraulic directional control valve for 6 months. However, the customer requested at least 1 year or more. Laird thought of the hydraulic directional control valve previously supplied by AAK, which had no abnormal leakage and had a service life of over 1 year. I told him that last time, AAK hydraulic directional control valve was quoted 20% expensive than its peers, but its service life was twice that of its peers. This time, it has been verified again with you. Let's make a comparison. Our quotation for this hydraulic directional control valve is $12.00. Based on a 1 year calculation, the monthly usage cost is $1.00. If the original valve manufacturer's price is $10.00 and the service life is 6 months, then the monthly usage cost is over $1.50. This is the invisible benefit that AAK hydraulic directional valve brings to customers. Laird agreed with my explanation and sent an order for 200 pcs of hydraulic directional valves the next day. How to avoid vibration and leakage in the sealing between the AAK hydraulic directional valve cover and valve cage? This is a small detail, AAK has tricks. AAK uses thread anaerobic adhesive, which is evenly injected into the joint and self cured at room temperature. After curing, it will not be corroded by hydraulic oil or other organic media, and the key lies in the uniform injection method. This avoids loosening of threads caused by vibration between the hydraulic directional valve cover cap and valve cage, while protecting the joint from corrosion. The seal between the AAK hydraulic directional valve cap and valve cage is not loose or leaking. AAK hydraulic directional valve, no leakage, you can also give it a try! AAK HYDRAULIC VALVES (561) 2023-04-14 https://www.aakindustry.com/info , -detail/directional-control-valve-aak561

I have some insistence that some of my counterparts in the hydraulic valve industry think that it is strange and even unnecessary. For many things, I am quite soft, but once those insistences are touched, I immediately become as hard as steel.   The price of hydraulic valves: as a hydraulic valve manufacturing company for more than 10 years, we have inquiries from new hydraulic valve customers every week, they are mostly B2B customers. These buyers are particularly concerned about one thing: price. This seems to be nonsense. Everyone cares about the price. What I am talking about is not the level of prices, but the consistency of prices.   Once, a hydraulic valve customer from Chile made an inquiry through e-mail. After several rounds of communication, he asked for my social account. I was a little puzzled. He asked privately: are you sure that the price you gave me is the same as others? I know that my Chilean counterparts also purchase hydraulic valves from AAK. I said of course. The same hydraulic valve, the same quantity range, and our price are always the same. He still seems worried. I know this is your principle, but have your colleagues really made no exceptions? I said no. I insist on that.   He said that last year, he purchased a batch of hydraulic valves from manufacturer A. The price was very expensive and the quality was good. It was a purchase order specially approved by his boss. A few days ago, his boss met one of his counterpart and learned that his counterpart also purchased the same batch of hydraulic valves from manufacturer A in the same quantity, but the price was much lower. The boss felt that he had been wronged. When he came back, he flew into a rage and asked me if I had taken a rebate. That was wrong. For AAK hydraulic valve, it would be great to have one more customer. However, if there is one more customer, it is at the cost of hurting another customer who once trusted you by using the "big data" method, this is too "expensive". I insist on not being manufacturer A. I said, I see. Trust me. The next day, his hydraulic valve PO came. The punctuality of AAK hydraulic valve: in my mind, there is no punctuality, either early or late. You choose by yourself. At first glance, it seems strange, right? But when I think about it, we often say the word "punctuality". What's the perspective? This is the other side's perspective. For example, when a meeting is held at 8 o'clock, the other party expresses the schedule. What about changing to your own perspective? What's on time? I have only two choices. Because this is important, because I respect this group of people, because I have to do something else. In short, a positive idea will choose to arrive early. In AAK hydraulic valve, only early, not late. AAK hydraulic valve, there are still many more strange insistence. For example, in the discussion on the development technology of hydraulic valves, we insist on not saying anything we don't agree with. For this reason, we have offended the customer's engineer and cancelled the order. For example, we insist on not giving rebates. Some buyers are willing to add a few more points to the PO, and then give them rebates. This makes it difficult for me to explain to his boss. These insistences, in my counterparts’ opinion, may be completely unnecessary or even totally wrong. But these are my insistence. Please don't touch, I insist. But what if one day, because of these insistences, the company goes bankrupt? Then go bankrupt. I have always believed that no matter in business or in communication with people, there are 3 most important elements: the first is honesty, the second is frankness, and the third is trust. Business method can decide how high to fly, and business ethics can decide how far to fly. You might say, what if you can't be yourself voluntarily? If there is no way to do the right thing, at least not to do the wrong thing; if there is no way to tell the whole truth, at least not to tell lies. The fundamental solution is to engage in the production of hydraulic valves, not to do evil, not to fabricate, not to be greedy, to do a good job in the manufacturing quality of hydraulic valves in a down-to-earth manner, and to give back to customers. When the company is faced with the difficult decision of performance and dream, what the company needs is a real crisis, so that all internal forces can feel the real crisis of death, the crisis of trembling performance, and the crisis of silence for all. Then the company can be reborn. For individuals, only by choosing integrity values can they go further and more steadily. AAK hydraulic valve can only take a road that few people take and do difficult and correct things. All the difficult things will become simpler, and the simple things will become more and more difficult. Because the difficult road is never crowded. Let's bless AAK hydraulic valve. https://www.aakindustry.com/info-det , ail/hydraulic-valves-aak255

Achilleas comes from a Greek hydraulic equipment company. One of their rollers was complained by users because of oil leakage. After sales personnel found that there was a large gap in the valve block used for hydraulic manifold, which was the root cause of oil leakage. After further disassembling the hydraulic manifold, it was found that there were cracks in the lower left and right corners of the valve block. They thought that the problem can be solved by replacing the valve block. However, after 2 months of construction, the old problem was happened again. The engineer asked Achilleas to consult the original hydraulic manifold manufacturer. The manufacturer was not sure why the valve block broke within 2 months. Achilleas was helpless. Achilleas realized that he could only contact AAK for help, because he also sent the inquiry for this hydraulic manifold to AAK before. At that time, AAK proposed to modify the oil circuit and hydraulic valve selection, but it was not accepted by their engineers. I was not surprised to receive his email. At the inquiry stage last year, our engineers found that there was an energy conflict between the oil circuit aperture of the hydraulic manifold and the selected hydraulic valve, resulting in the frequent instantaneous pressure rise of the hydraulic system. In particular, the oil circuit wall thickness at the left and right lower corners of the valve block is not enough, so it is not surprising that the valve block is cracked. This time, Achilleas didn't go to their engineers to verify. AAK redesigned the oil circuit, re selected each hydraulic valve, and sent the hydraulic manifold block sample after 30 days. Last week, Achilleas sent an email saying that after replacing with AAK sample for such a long time, there was really no problem. Moreover, the total price was saved by 20% compared with the original one, and the customer feedback that the action sensitivity was also improved a lot. This time, even their engineer also suggested that the boss should give the design and production of the hydraulic manifold block to AAK in the future. He also wants to know why AAK is so good? I told him that the most important thing in the design of the hydraulic manifold block is to determine the operating parameters of the hydraulic system, understand the requirements of the system for the maximum working pressure and maximum flow, and reasonably design the oil circuit. Secondly, the pressure drop of the valve must be considered to ensure that the pressure drop through the pressure valve, flow valve and directional valve is not too high, which will affect the load action and cause the pressure problem of the valve block. AAK has more than 20 years of industry experienced professional engineer from German HAWE company, who have unique experience in the design of hydraulic manifold blocks, especially in the oil circuit design. Combined with the system principle, through the reasonable selection of hydraulic valves and the innovative and optimized design of the oil circuit of the valve block, the oil leakage caused by high pressure can be avoided, and an efficient, economical and reliable hydraulic manifold block can be produced. Maybe there is no such second hydraulic manifold block manufacturer in Ningbo. AAK hydraulic manifold block is economical, efficient and reliable. You can also try it! https://www.aakindustry.com/info-detail , /hydraulic-manifold-aak254

A report said that the average life span of Chinese enterprises is less than 3 years, and the life span of large enterprises is rarely more than 35 years. One third of the world's top 500 enterprises have disappeared. AAK Hydraulic Manifold is 9 years old, and I have been in awe of his premature death, so I walk on thin ice every day, constantly cultivate myself and build team. Most failed enterprises have their own problems, but their basic problem may be poor learning ability. This is also what I learned from Peter Shengji's "The Fifth Cultivation" recently.   1. Cultivate the mental model of the founder of the enterprise. 1）Identify leaps of abstraction: pay attention to how your mind jumps from observation to general conclusion.   2）Practice the left-hand column: write down the words that your heart usually won't say.   3）Balancing inquiry and defense: the technique of openly discussing problems with each other;   4）Face up to the difference between what we say and what we do.   These 4 skills are not easy for me to grasp at present, but I have already put them into practice, and I believe they will be fruitful.   2. Use the mental model to influence the team and build a learning team.   Whether the above 4 skills are suitable for you or not, it is important for enterprises to find their own ways to change the mental model of managers and discuss problems openly. The learning of manufacturing enterprises may only be internal and external.   AAK Hydraulic Manifold, team's internal learning, analysis and face up to our shortcomings and strive to correct them. Many business owners are admonishing: do as I say, not as I do! In fact, the boss's behavior will imperceptibly affect everyone around him. AAK Hydraulic Manifold requires the front-line staff of the workshop to do it according to the process, operation SOP, and benchmarking data, and insist on manufacturing quality. The management personnel are required to guide and supervise according to the process.   The internal benchmark of AAK Hydraulic Manifold includes the front-line workers in the workshop, managers, technicians and R&D departments. As long as they have successful behaviors, they will become a model for AAK hydraulic manifold team to learn.   AAK hydraulic manifold, external learning: focus on top brands, starting from imitation. 9 years ago, when we decided to upgrade our products and do hydraulic manifolds, our only expertise was the production of hydraulic cartridge valves, no any experience about the design of hydraulic manifolds, the selection of cartridge valves, the production of manifold blocks, and the assembly and testing of hydraulic manifolds. We spent a lot of money to buy SUN's hydraulic manifolds to imitate, and summarized the underlying logic from the hydraulic principle. We hired engineer who have worked in HAWE for more than 10 years. Take small steps and accumulate every day, until to serve 3 major types of customers, such as Honeywell the Fortune 500 company, Skyjack the listed company in Canada, and BL the military industry company in Israel.   The external benchmark of AAK hydraulic manifolds includes the hydraulic manifold manufacturers from the first-line brands, the Honeywell from the world's top 500, the customers of listed companies. These customers with the characteristics of exquisite requirements, urge AAK Hydraulic Manifold employees to keep learning, growing and making progress.   AAK Hydraulic Manifold, team learning, from inside to outside. An excellent team needs not only talented individuals, but also the atmosphere of learning. An atmosphere of mutual learning is formed within the enterprise. Employees appreciate and cooperate with each other, eliminate the gap between departments and the distance between superiors and subordinates, share information, and achieve effective communication.   3. Use the mental model flexibly, learn to give up, not try to prolong, learn to improve, that is, constantly surpass yourself.   For some products, enterprises will have to give up on a planned basis rather than try to prolong the life of products or businesses. Some hydraulic manifolds, including plated hydraulic valves. When AAK produced hydraulic valves 13 years ago, there was also a production line for plated valves, but after the production of hydraulic manifolds, AAK resolutely abandoned the plated valves, and focused on the hydraulic cartridge valves. The total quality management and lean production of Japanese manufacturing industry are aimed at their best products. The world invisible champion of German enterprises also focuses on the familiar part.   5 years ago, AAK Hydraulic Manifold hired workshop manager from the Japanese manufacturing industry to directly guide and lead the employees on the production site. We clearly saw the improvement of quality and efficiency, and clearly felt the effect of process improvement and capacity release. More importantly, the technicians were stimulated. Using knowledge flexibly can change our way of thinking. Practice with practical actions, find problems, solve problems, and strive for satisfactory results.   AAK Hydraulic Manifold is good at innovation, and can also face failure bravely, but it will always move forward in imbalance. https://www.aakindustry.com/info , -detail/hydraulic-manifolds-aak480

Jimmy is from a hydraulic equipment company in the United States. He has cooperated with AAK for more than 2 years and is very sticky about the quality of hydraulic relief valves. At the end of last year, the hydraulic pilot operated relief valve used in the hydraulic unit they developed could only be purchased from local manufacturer because of tight time. Problems were encountered in the hydraulic manifold installation. The existing hydraulic relief valve of the American factory occupied a little position of the motor, resulting in difficulties in the installation of the motor. If the position of the hydraulic relief valve is changed, the manifold oil circuit will be changed and the power supply of the hydraulic system will be affected. The manufacturer of the hydraulic pressure relief valve has no time to adjust the size. Jimmy had to look for other manufacturers of hydraulic pilot operated relief valves. After a week, he found more than 10 local manufacturers of hydraulic relief valves in the United States. Some of them were not willing to customize it due to small quantity, while some gave no reply at all. Jimmy was very helpless. Jimmy thought of AAK Hydraulic Valves in Ningbo and asked how long it would take to produce 10 non-standard hydraulic pilot operated relief valves? I felt his anxiety and asked if he had encountered any difficulties in purchasing hydraulic relief valves. Only then did he tell me the embarrassment he had encountered in domestic manufacturers in the United States. According to the drawings and manifold schematic diagram of the hydraulic pilot operated relief valve provided by him, AAK engineers also suggested that the hydraulic pilot operated relief valve should be redesigned to reduce the length of the hydraulic pressure relief valve by 35%. AAK can send 10 hydraulic pilot operated relief valves within 30 days. Their engineers doubted this innovation, because if the size is reduced by 35%, the load of the hydraulic pilot operated relief valve will be affected. We understood the concerns of their engineers. We would see the result in a month. If AAK hydraulic relief valve can not solve the problem of the manifold installation, we were willing to bear the loss. Jimmy was waiting for the sample of AAK with worry. After the samples were sent out, we soon received email from Jimmy. AAK newly designed hydraulic relief valve was successfully installed into the manifold, and the equipment commissioning was normal. Their engineers were satisfied. They were curious to know how AAK hydraulic pilot operated relief valve was reduced by 35% under the condition of ensuring parameter. AAK adjusted the size of the spring chamber of the hydraulic pilot operated relief valve, and used Smalley wave spring which has smaller size and can be put into the smaller spring chamber of the hydraulic relief valve. The wave spring adopts the winding process. It is a thin circular springy metal element composed of several wave crests and troughs along the circumferential direction in a sinusoidal form, can withstand large loads even with a small amount of deformation, and the force is symmetrical. Thus, the length of the hydraulic pilot operated relief valve can be shortened. AAK hydraulic pilot operated relief valve, has unique skills to solve the problem that American manufacturers can not do. You can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-relief-valve-aak253

This week, we’d like to introduce a hydraulic counterbalance valve equivalent to SUN CBCG, the counterbalance valves with pilot assist are meant to control an overrunning load. 3 months, we received an inquiry from a new customer from the Europe for a hydraulic counterbalance valve equivalent to SUN CBCG. After quoting, we were advised that AAK price is not competitive. Yes, many hydraulic cartridge valve manufacturers in China have this hydraulic counterbalance valve CBCG in stock, so the price competition is very fierce. However, not every manufacturer is able to produce the same quality as SUN, while AAK’s quality has been the supplier of SUN for 5 consecutive years. Our quality has been approved by market. After knowing above, this European customer placed a trial order of 10 pcs with AAK. We are confident that this new European customer will become a long-term partner of AAK very soon.   AAK hydraulic counterbalance valve E-CBCG two advantages: 1. The function and performance is equivalent to that of SUN CBCG 2. Its service life is 2 times that of its domestic peers Technical parameters of AAK E-CBCG hydraulic counterbalance valve: Max. Operating Pressure: 350 bar (5000 psi) Flow: 15 gpm (60 L/min) Internal Leakage: 5 drops/min Cavity: T-11A AAK E-CBCG hydraulic counterbalance valve, benchmarking SUN CBCG, its service life is 2 times that of its domestic peers. You are welcome to give it a try. AAK HYDRAULIC CARTRIDGE VALVES (778) 2024-02-12 https://www.aakindustry.com/info , -detail/counterbalance-valves-aak778

Flat Hex Nut Product Description A flat hex nut is a type of nut with a hexagonal (six-sided) shape and a flat profile. Nuts are fasteners that are used in conjunction with bolts or screws to hold two or more parts together securely. The hexagonal shape of the flat hex nut allows for easy tightening and loosening using a wrench or a socket. Hex nut is an important part of thread bar accessory, it is used in all kinds of highway, railway, municipal construction, large Bridges, soil nailing, foundation pit anchoring, slope anchoring and other engineering construction. Hex Nuts are flat nuts and Spherical nuts, flat nut (upper nut), Spherical nut (lower nut). Commonly used specification is divided into 20 mm, 25 mm and 32 mm, 36 mm, 40 mm, commonly used materials are divided into 45 #, 40 cr material, hardness value is between 28 and 35.

M25 M32 Hex Nut for PT bar Product Description Hex nut is an important part of thread bar accessory, it is used in all kinds of highway, railway, municipal construction, large Bridges, soil nailing, foundation pit anchoring, slope anchoring and other engineering construction. Hex Nuts are flat nuts and Spherical nuts, flat nut (upper nut), Spherical nut (lower nut). Commonly used specification is divided into 20 mm, 25 mm and 32 mm, 36 mm, 40 mm, commonly used materials are divided into 45 #, 40 cr material, hardness value is between 28 and 35.   Normal there are full hex nut and spherical hex nut used in construction. There is also lock nut, which is shorter and thinner than normal hex nut in the tensioning end.

External Spacer Product Description External Spacer or Centralizer is used in centralize the thread bar inside the middle of the drill hole. What is the Rebar Centralizer for? A device that incorporates a hinged ring and bow spring that keeps the casing or liner in the center of the wellbore to help ensure effective placement of a cement sheath around the casing string. Metal Centralizers Get in place quickly on your single rebar or threaded rod, whether hanging vertically or horizontally. Can be fixed in seconds. No more fumbling around with reeling or cutting every few minutes, saving valuable jobsite time and money! Made of carbon steel, these centralizers are durable and won't crack or break in extremely cold weather. If coating is specified, please call for price and production time. Custom sizes can be produced very quickly if required. ​​​ Specification: 1. External Spacer: The strap design makes the installation simply and easily, there are many pins inside the spacer, and the pins can lock the corrugated sheathing into the pitch makes the spacer immovable. 2. Strap Centralizer: The strap design makes the installation simply and easily, there are many pins inside the spacer, and the pins can lock the rebar into the pitch makes the centralizer immovable. 3. Olivary Centralizer: The olivary shape design makes the installation simply and easily ,there are six lockers on the centralizer, you can assemble the centralizer as buckle ,and there are many pins inside the wall, the pins can fasten the thread bar into the pitch, and this makes the centralizer immovable on the place of the rebar. 4. Lantern Centralizer: Lantern centralizer is used in centralizer the thread bar inside the middle of the drill hole.

Demetrius comes from a hydraulic equipment manufacturing company in Greece and has been purchasing hydraulic cartridge valves from China for 2 years. In the second half of last year, a hydraulic cartridge valve with high requirements for all parameters made him very upset. Their company's newly developed hydraulic unit did not go smoothly in the testing, and the hydraulic cartridge valve purchased by Demetrius had a pressure holding time of only 1-4 weeks. The root cause was either this parameter did not meet the standard or that parameter did not meet the standard. The original hydraulic cartridge valve manufacturer tested 3 times but still did not meet the standard. Time has been wasted for more than half a year, and the engineer complained to the boss. Demetrius was very anxious. Demetrius found AAK and contacted us. After communication, we learned that he had encountered difficulties in purchasing hydraulic cartridge valves. Based on the parameter requirements provided by Demetrius for hydraulic cartridge valves, AAK engineers analyzed and found that this hydraulic cartridge valve has high requirements; Close attention needs to be paid during the durability testing. I told him that not only the production of this hydraulic cartridge valve is very important, but also the testing on the various parameters of the hydraulic cartridge valve is also very important. Most hydraulic cartridge valve manufacturers do not pay attention to the testing process, resulting in unstable performance of hydraulic cartridge valves. After 50 days, 30 hydraulic cartridge valve samples from AAK were sent out. Last week, Demetrius informed us via email that their engineers have approved each parameter of the AAK hydraulic cartridge valve, and their hydraulic unit has been delivered to the customer. It is likely that they will receive a batch order. Each parameter of the AAK hydraulic cartridge valve can meet the standard, it is because that while the manufacturing quality is being rigorously improved, the performance and function of the hydraulic cartridge valve are also being tested without negligence. For this hydraulic cartridge valve, AAK uses a multifunctional hydraulic valve testing equipment specially customized by Chufan Hydraulic. We operate it as follows: first, set the testing parameters requirements for each valve on the computer, and then load the hydraulic cartridge valve into the testing equipment to run for a period of time. After the test is completed, the screen will display the testing results. The pressure range, reversing performance, internal leakage, pressure loss, pressure adjustment range, and pressure and flow stability performance data of each hydraulic cartridge valve will be displayed on the electronic display screen, and the detection results will be automatically displayed in real-time. If there are differences, an alarm will be given to remind. Anything that does not meet the standards will be treated as defective products. Most hydraulic cartridge valve manufacturers in China only rely on manually operated hydraulic test benches for testing, and most of them are manually judged, Sometimes, negligence often leads to individual hydraulic cartridge valve parameters not meeting the standards. AAK hydraulic cartridge valve, focus on manufacturing quality, functional and performance testing, you can also give it a try! AAK HYDRAULIC CARTRIDGE VALVES (655) 2023-08-22 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valves-aak655

Stephen is from Hi-Force hydraulic equipment manufacturing company in the UK. In the second half of last year, he was promoted to the purchasing manager of Kuala Lumpur Branch due to his excellent work. Within a week of taking office, he met with complaints. A batch of their hydraulic cylinders were noisy and vibrated seriously during operation. The after-sales engineer failed to solve the problem within 3 days. The user was not satisfied. Stephen was a little worried. Stephen browsed an article of AAK on Google: "change the design of the hydraulic directional control valve, the vibration disappeared, and AAK eliminated the Canadian factory at zero cost", and left a message: how to solve the noise and vibration of the hydraulic cylinder? After reading this message, I roughly judged that either the hydraulic directional control valve used had problems or the original design had hidden dangers. We asked Stephen to provide the hydraulic system schematic diagram and design drawings, and AAK engineer judges that the working principle of the hydraulic cylinder is reasonable, only by checking on site can we find out the source of the vibration, and then no news from Stephen. 2 weeks later, Stephen emailed that according to the last case that AAK solved the vibration of the hydraulic cylinder, they also added a triangular throttling groove to the hydraulic direction control valve, but after installation, the hydraulic cylinder still vibrated. Their engineers said that AAK solution was a lie. I was speechless and didn't want to explain anything, so I ignored him. 3 days later, Stephen emailed us again, and sent a video of the hydraulic cylinder working and asked our help to check. AAK engineers found that the hydraulic cylinder will emit rhythmic noise and vibration whenever the load drops in the actual work, and preliminarily judged that there is a problem with the hydraulic direction control valve. AAK technical team discussed again according to the drawings, the working principle diagram of the hydraulic cylinder and the working video of the hydraulic cylinder, and confirmed that the problem lies in the hydraulic direction control valve. I told him that AAK could redesign the hydraulic directional control valve and asked him to send us samples of the original hydraulic directional control valve. Stephen may have no choice but promised. 5 days later, we received the sample of the original hydraulic directional control valve, which confirmed the judgment of our engineers that the internal leakage and external leakage of the original hydraulic directional control valve was reversed. 1 week later, AAK sent the newly designed external leakage type hydraulic directional control valve. Stephen informed by email that the noise and vibration problems of the hydraulic cylinder had been solved after using AAK external leakage hydraulic directional control valve. In the past 4 weeks, their engineers, from suspicion, disdain to admiration, wanted to know how AAK engineers found and solved problems, and sent out new hydraulic directional control valves in only 1 week. When the load of the hydraulic cylinder moves downward, the pressure at the oil inlet of the hydraulic directional control valve is pushed higher due to the action of the needle valve. At this time, the control oil inlet is still the original set pressure. Under the action of the oil inlet pressure, the hydraulic directional control valve will be closed. When the oil inlet pressure drops, the hydraulic directional control valve will be opened again. The repetition of this process leads to the vibration and noise of the hydraulic cylinder. That is, the reason for the problem lies in the selection of hydraulic directional control valve. It is only necessary to change the internal leakage hydraulic directional control valve into the external leakage hydraulic directional control valve. Just a while ago, a Canadian customer also ordered the same type of external leakage hydraulic directional control valve, and we have existing samples, so they were sent out soon. Their engineers have to sigh that AAK has too many customer cases, which is true and can really solve the problem. Stephen also privately informed us that his boss was very satisfied with his attitude and spirit to solve the problem this time, and his colleagues in Kuala Lumpur Branch admired him. AAK hydraulic directional control valve, no noise, no vibration, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-directional-control-valve- aak252

Pozo is from Argentina, and left a message on AAK hydraulic cartridge valve website the day before yesterday: I saw a customer case that AAK hydraulic counterbalance valve has 1 additional function compared to its peers. We also have similar difficulties. Can AAK customize the hydraulic counterbalance valve according to our parameter requirements to meet our equipment requirements? After communication, it was learned that Pozo's lift experienced shaking and impact when the load was lowered, resulting in unstable system. Pozo contacted several hydraulic cartridge valve manufacturers in China but made no substantial progress. According to the dissected diagram of the hydraulic counterbalance valve sample he emailed, as well as the schematic diagram of the lift hydraulic system, it is very similar to the one customized by AAK for a Peruvian customer a while ago. The overflow area of the hydraulic counterbalance valve port undergoes a sudden change, which cannot timely buffer the pressure peak generated by load impact. I showed him a diagram of how AAK solves the overflow area of the hydraulic counterbalance valve port. Based on this, then to optimize the internal structure and external dimensions of the hydraulic counterbalance valve, it will match his hydraulic system. Pozo requested AAK to make samples of hydraulic counterbalance valve, and today we received his bank slip for the development fee. The optimization plan that we proposed to Pozo is as follows: 1. The hydraulic counterbalance valve sleeve is equipped with a transverse through hole to form the main hole section of the valve sleeve, a reducing hole section of the valve sleeve, and a valve sleeve flow groove connected to the fourth oil port on the outer wall of the valve sleeve. 2. In the main valve body of the AAK hydraulic counterbalance valve, there is a fixed first valve seat. The main valve spool slides and fits with the main valve body, dividing the inner chamber of the main valve body into the first and second chambers connected to the oil inlet, as well as the control chamber. The second chamber is equipped with a second valve seat and elastic components. 3. There are multiple U-shaped grooves along the axial direction on the circumferential surface of the main valve spool. The valve spool is located in the main hole section of the valve sleeve and can move left and right. On the left side of the second valve spool reducing section, there is a protrusion for opening and closing the valve seat transition hole section, and on the right side of the protrusion, there is a valve spool throttle hole. When the pressure oil enters, the valve spool begins to move left and gradually exposes various radial throttle holes. The flow area can be relaxed and increased, and the hydraulic counterbalance valve can timely buffer the pressure peak generated by load impact. After the plan is confirmed by Pozo, our sampling master can start working, and it is estimated to be another month of hard work. Come on, masters! I am also very happy today. AAK can provide help to others again, and at the same time, AAK has another new customer. With AAK hydraulic counterbalance valve, the equipment has no shaking or impact, and you can also give it a try! AAK HYDRAULIC CARTRIDGE VALVES (560) 2023-04-13 https://www.aakindustry.com/info , -detail/counterbalance-valves-aak560

Caspar is from Samhydraulik S.p.A. in Italy, mainly responsible for the purchasing of hydraulic valves. In March this year, Caspar requested AAK to sample 10 hydraulic pressure control valves by soonest. This sample order was quoted half a year ago. There must be a reason for him to be so anxious to place an order now. After several rounds of communication, it was learned that Caspar was cheated by the original hydraulic pressure control valve manufacturer. In the second half of last year, their company developed a new hydraulic power unit, which requires a high-pressure hydraulic pressure control valve, and the durability should reach more than 2 million times. Caspar contacted more than 10 hydraulic pressure control valve manufacturers. Most of them are able to produce the hydraulic pressure control valves with high pressure resistance and durability of more than 2 million times. Only AAK hydraulic valve and other 2 manufacturers have quoted prices. After receiving our quotation, Caspar said that the price of AAK hydraulic pressure control valve was about 20% higher than that of other manufacturers, and then there was no further news. Until today, 6 months later, he was anxious to ask AAK to make samples immediately. 6 months ago, Caspar selected another hydraulic pressure control valve manufacturer to make samples. 5 weeks later, their new hydraulic power unit was successfully tested and the equipment was expected to be popular. Caspar asked the original hydraulic pressure control valve manufacturer to hurry up to prepare materials, but the manufacturer wanted to raise the price by 40%. Because the valve spool material was hard, the cutting tools needed to be changed constantly, the production cost was increased, and the defective rate was also high. If without a price increase, the manufacturer refuses to produce the order. Caspar felt very helpless. The boss was very dissatisfied with such a hydraulic pressure control valve manufacturer who raised the price at the last moment, and asked Caspar to find a new manufacturer. Caspar suggested that AAK can make samples. If the original price of AAK hydraulic pressure control valve can be maintained, 20% of the cost will be saved. 1 month later, AAK sent 10 samples of hydraulic valve pressure control valves. 1 week later, Caspar informed that the test was passed and 1,000 samples need to be produced immediately. Caspar also wants to know why AAK hydraulic valve pressure control valve can maintain its original price in the same 6 months, while the other manufacturer needs to increase it by 40%. Most manufacturers of hydraulic pressure control valves do not pay attention to some details in the processing at the drawing stage, and only know after suffering in the sampling process. This hydraulic pressure control valve has high requirements, especially the reaming of valve spool hole is the key to the finished product. AAK does not need to constantly change the tools, because the ingenious use of cutting fluid in the cutting process can reduce the friction between the tool and the workpiece surface, reduce the chip, and reduce the cutting force and cutting temperature. This is a unique skill. AAK engineers with more than 20 years of production experience strictly control the process, and select the best Castrol cutting fluid in the world. With its high permeability and high adsorption efficiency, combined with the control of our engineers, not only the cost is saved, but also the tool wear is effectively reduced, and the surface quality of the workpiece is also high. AAK hydraulic pressure control valve is high-pressure resistant and durable for more than 2 million times. You can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-pressure-control-valve-aak251

Dolly is from a hydraulic equipment company in Peru. His boss thinks highly of him and plans to promote him to be purchasing manager, but a hydraulic cartridge relief valve stumped him. In the first half of last year, they sold a batch of hydraulic power units. 3 months later, the customer complained that the adjusting screw of the hydraulic cartridge relief valve had serious slippage, and the failure to adjust led to the strike of the equipment. The hydraulic cartridge relief valve manufacturer advised that this hydraulic cartridge relief valve benchmarks HydraForce, and the material is the same as HydraForce. The adjusting screw slipped after 3 months, which was caused by the high frequency of use. It can only be replaced with new ones. But it still slipped after 3 months. The customer was not satisfied, and the boss was also angry. He asked Dolly to replace the manufacturer of the hydraulic cartridge relief valve with a new one and ensure that it was safe for 1 year. Dolly became to be under great pressure. Dolly noticed AAK hydraulic valve website on Google and left a message: What is the root cause for the regulating screw of the hydraulic cartridge relief valve to slip in 3 months? As soon as I saw this message, I guessed that he had encountered a customer complaint. After communication, I learned that the original manufacturer had replaced the valves twice, the sliding problem was still not solved. This is the first time that I have met such a model, but AAK engineer said confidently that it would not be difficult to solve the problem and guarantee it for 1 year. After 30 days, AAK sent 30 hydraulic cartridge relief valves. Last week, Dolly sent an order for 960 hydraulic cartridge relief valves, specifically referring to AAK's hydraulic cartridge relief valve adjusting screw. More than 1 year later, there was no slippage, and the customer was satisfied. AAK hydraulic cartridge relief valve has been used at high frequency for 1 year without damage, mainly due to the following 3 aspects: 1. Special material selection: GCr15 high carbon chromium bearing steel is selected as the regulating screw of the hydraulic cartridge relief valve. After special heat treatment, its hardness and wear resistance are increased by 30%. Most hydraulic cartridge valve manufacturers do not pay attention to the regulating screw and select carbon steel. 2. Special heat treatment: the regulating screw is first heated to 810 ℃, isothermal annealed to 720 ℃, then air cooled, then oil quenched at 860 ℃, then carbonitriding at 830 ℃ for 3 hours, oil quenched, cryogenic treated at - 60 ℃ to - 70 ℃, finally tempered at 150 ℃ to 60 ℃, then air cooled, and finally the hardness can reach HRC67. General manufacturers cannot master the details of this heat treatment. Targeted geothermal treatment: the regulating screw is first heated to 810 ℃, isothermal annealed to 720 ℃, then air cooled, then oil quenched at 860 ℃, then carbonitriding at 830 ℃ for 3 hours, oil quenched, cryogenic treated at - 60 ℃ to - 70 ℃, finally tempered at 150 ℃ to 60 ℃, then air cooled, and finally the hardness can reach HRC67. General factories cannot master the details of this heat treatment. 3. Special testing: each adjusting screw is tested with a Rockwell hardness tester, and the hardness reaches the standard for 100%. Today, Dolly told me privately that his promotion to be a purchasing manager has been hold for more than a month. The boss officially promoted him today, and he became more and more energetic. AAK hydraulic cartridge relief valve, the details ignored by peers, we pay close attention strictly, you can try a small order! https://www.aakindustry.com/info-det , ail/hydraulic-cartridge-relief-valves- aak410