Tools & Hardware

Adam, an old customer of AAK Hydraulic Valve, asked me to copy 2 hydraulic cartridge valve samples for exhibition some time ago. After receiving the samples of cartridge valves, I was a little surprised that the surface of the valve body was not heat treated, just the polished low carbon steel raw material. I double checked with him, is it still copied as required by the email, or can AAK improve the appearance of the valve? He just replied: do your best, the samples are for exhibition. I sent samples and refined 3 selling points. 1. The material of cartridge valve body and valve spool is changed to high- strength alloy steel. 2. The surface treatment of hydraulic cartridge valve is galvanized nickel alloy. 3. The durability of hydraulic cartridge valve ensure for more than 2 million times. Why should I do this? In fact, it is due to a small matter I met before. I needed to polish 2 stones. I found a stone polishing studio. They sent the stones back in a week. After I got the polished stones, I felt that they did not polish them attentively. In fact, the requirements for polishing the stones are very simple. As long as you polish it carefully, you can do it well. But they just didn't want to work hard, so they sent stones back after dealing with them. I'm a little surprised. The studio seems to be of high quality. Why can't they do this little thing well? Adam needs hydraulic cartridge valve samples to participate in the exhibition. The manufacturing quality, function stability and performance durability of such products must be considered. After Adam got the hydraulic cartridge valve samples, he told me that he had 3 hydraulic cartridge valve manufacturers copy 10 hydraulic cartridge valve samples. Only AAK made improvements on the basis of the original, and helped him extract 3 selling points, while others just completely copied the original. 2 months later, Adam told me that the 2 models of hydraulic cartridge valves copied by AAK had the most inquiries. No matter my customers and I, or my suppliers and I, we are "working together", but just the office is different. No matter who, no matter how: 1. You can do any work as long as you do your best. Doing your best is the easiest way to work. 2. If you are absent-minded, you may lose a customer you can cooperate with for a long time, and then continue to complain about the difficulty of business.   In fact, most of the work has little technical content. As long as we do our best and work hard, we can do a good job. But most people just don't want to do more and think more, which leads to their failure in work and dissatisfaction of the boss. In fact, they can take their work seriously and carefully, and then get higher pay. But they are not. They are slacking off and dealing with their work casually, while complaining about how hard life is and how unrecognized talented they are. Our corridor part-time cleaning aunt, the property did not require her to work on weekends, because there were not many people on weekends, but occasionally some people worked overtime. I often see her on weekends. I asked her curiously, "Are you coming on weekends?" She naturally replied that I have nothing to do at home, so I come to see if there is any place that needs cleaning. This is the difference between attentiveness and inattentiveness. AAK Hydraulic Valve, treats every old customer with care from a small matter, and will meet new customers with more care. https://www.aakindustry.com/info-deta , il/cartridge-valve-manufacturers-aak482

Yesterday, hydraulic cartridge valve manufacturer AAK defined some people as the bottom of society, although it is quite distressing, this is also a fact. In Ningbo, although there are over 200 of hydraulic cartridge valve manufacturers, most of them are at the bottom of the industry. People are stratified, and hydraulic cartridge valve manufacturers are also stratified. People at the bottom of society are almost always those who do not like to use their brains, and their perception of life is relatively shallow. Easy to move and angry, but usually comes quickly and goes quickly. They are deeply moved when others helped them, and at that moment, they were sincere. But they superficially believe that a "thank you" from themself can be equivalent to someone else's deep affection. The root cause is that they do not understand that the underlying logic of society is "equivalent exchange", and their gratitude becomes particularly cheap. If you provoke them, they do care about your past interactions and the help you gave them, and immediately turn again you mercilessly, because they really can't hold back. Even if there is a cost of having their tongue cut off afterwards, they must speak out what they want to say. Recently, a client of mine found a new valve from a hydraulic cartridge valve manufacturer in Ningbo, for AAK did not have the existing program for this valve, he had to purchase it from that manufacturer. This hydraulic cartridge valve manufacturer seems to have just started foreign trade and has received a foreign trade order. He treated my client very well and was also very grateful. 2 months later, upon receiving the bulk shipment from this hydraulic cartridge valve manufacturer, my client requested a refund and return due to unstable quality. However, the manufacturer seemed to disappear and did not respond to emails or phone calls. My client asked me to help negotiate with the hydraulic cartridge valve manufacturer, so I saw the email communication between the client and this hydraulic cartridge valve manufacturer. This manufacturer went from treating customers as gods to trampling them underfoot, just in a moment of thought. People at the bottom of society are like neighbors in a large courtyard. As long as their own interests are not involved, neighbors will be very enthusiastic and helpful to each other. However, when it comes to their own interests, even if they are brothers, they will fight against you. Hydraulic cartridge valve manufacturers at the bottom of the industry are like people at the bottom of society. As long as you influence their interests, whether you are their customer or their supplier, you become their enemy. I like to interact with bookworms who love to "use their brains", not only because of their sense of propriety, but also because they don't waste time and are controllable. The same goes for partners in business, if your supplier is from the bottom of society and is just a brainchild, such uncontrollable cooperation is like walking on a tightrope. AAK, a Hydraulic cartridge valve manufacturer in China, loves reading and has a brain. Live thoroughly and do professionally. AAK HYDRAULIC CARTRIDGE VALVES (658) 2023-08-27 https://www.aakindustry.com/info , -detail/hydraulic-cartridge-valve- manufacturer , s-aak658

Stephen is from a hydraulic equipment manufacturing company in Greece, and his 3-year procurement is very successful. At the beginning of the year, their customer customized the company's large tonnage cranes, with very high requirements for hydraulic cartridge directional control valves. Stephen chose a local hydraulic cartridge valve manufacturer who has cooperated with him for 3 years to make samples. During the prototype debugging, the connecting pipeline of the oil cylinder burst, causing the boom to drop abnormally. Their engineers advised that the key is to optimize the load balance of the hydraulic cartridge directional control valve. The manufacturer said that this hydraulic cartridge directional control valve benchmarks a standard part of HydraForce and cannot be improved. Stephen contacted more than 10 hydraulic cartridge valve manufacturers, but none of them was willing to improve the standard parts of HydraForce. Stephen was very worried. Stephen found AAK while browsing Google. He noticed that AAK was continuously supplying HydraForce and left a message: Can AAK optimize the hydraulic cartridge directional control valve of HydraForce standard parts? I guess that he encountered trouble in purchasing hydraulic cartridge directional control valves. After communication, I learned the story above. According to his hydraulic schematic diagram, production drawings of hydraulic cartridge directional control valve, and equipment work videos, AAK engineer said that the original system was designed as a double cylinder luffing structure. During the luffing operation, the cylinder motion was not synchronous. When the system was suddenly loaded, the double cylinders were biased and the pipeline burst. Only by optimizing the structure of the hydraulic cartridge directional control valve can the load balance of the system be improved. Stephen saw the hope and paid the development cost on the second day. After 35 days, AAK sent 12 samples of hydraulic cartridge directional control valves. 2 weeks later, Stephen informed by email that after replacing with AAK hydraulic cartridge direction control valves, the prototype debugging was smooth, no pipeline burst, and the equipment had been delivered to the customer. After the customer tried, there would be an official order. AAK optimized the structure of the hydraulic cartridge directional control valve, and set small tricks on the first and second oil ports of the valve body. The oil passage between the first oil port and the valve chamber is equipped with a detachable damper, and the inner wall of the valve chamber at one side of the second oil port is provided with a boss extending radially. After this optimization, the oil pressure connected to the first oil port and the second oil port of the valve can act on both ends of the valve spool respectively, and the valve spool can slide between the first working position and the second working position under the action of the pressure oil. When the valve spool is in the first working position, the first oil port of the valve body is connected to the second oil port, and when the valve spool is in the second working position, the oil path between the first oil port and the second oil port of the valve body is not connected. AAK hydraulic cartridge directional control valve, no longer need to worry about safety, you can also try a small order! https://www.aakindustry.com/info-det , ail/hydraulic-cartridge-directional- control-va , lves-aak413

Balram is from a hydraulic equipment manufacturing company in Chile. The purchase of 3 years has been smooth, but the recently purchased hydraulic cartridge pressure control valve has upset him. The hydraulic cylinder supplied by them was complained by a customer, the hydraulic shock caused serious vibration of the pipe, which was easy to crack and leak oil. It is judged by the after-sales that it was caused by the impact load of the hydraulic cartridge pressure control valve used to control the pipeline pressure of the oil cylinder. The impact load of the hydraulic cartridge pressure control valve must be reduced. The hydraulic cartridge pressure control valve manufacturer advised that the impact load cannot be avoided. Balram checked with different hydraulic cartridge valve manufacturers in China to solve the impact load of the hydraulic cartridge pressure control valve. A week later, it was still fruitless. Balram browsed AAK website on Google and clicked the articles or products about hydraulic cartridge pressure control valves for many times. He left us a message: How to reduce the impact load of hydraulic cartridge pressure control valve? My reply: There are many reasons for the problem, which should be analyzed in detail. According to the video of abnormal equipment sent by Balram, as well as the production drawings of hydraulic cartridge pressure control valves, AAK engineers judged that the structure should be optimized and AAK is 90% confident to be successful. Balram saw the hope and asked AAK to make samples. After 35 days, AAK sent 12 samples of hydraulic cartridge pressure control valves. Last week, Balram said that it had been 9 months since AAK hydraulic cartridge pressure control valve was used on the hydraulic cylinder, and the pipeline was free of vibration and cracking. The customer was very satisfied with this after-sales service. His boss has decided to replace all the hydraulic cartridge pressure control valves on this batch of hydraulic cylinders with AAK ones, so AAK can prepare materials in advance. According to the schematic diagram provided by Balram, AAK optimized the original structure of the hydraulic cartridge pressure control valve. It can realize small opening throttle back pressure, and meet large opening oil return to reduce pressure impact. It can effectively reduce the peak value of pulsating pressure impact generated by high-frequency commutation, avoid pipeline vibration impact damage, and reduce the impact load on the connection between the vibration table and the hydraulic cylinder. AAK made below 3 changes: 1. A cavity with a stop is formed between the upper part and the lower part of the valve body, and the upper end of the valve spool in the cavity is against the positioning nut. 2. A sliding block is arranged in the middle of the valve spool, a stop is arranged at the lower part, a pressure regulating spring is arranged below the stop, and the pressure regulating spring is fixed on the spring seat. 3. The spring seat is pressed on the plug, with an adjusting bolt in the middle. One side of the lower part of the valve body is provided with a radial oil inlet hole and an axial control hole connected with it. The other side is provided with a radial oil return hole, a damping hole and an axial oil return hole connected with both holes. The axial control hole is connected with the upper oil hole on the shoulder of the upper valve body. AAK hydraulic cartridge pressure control valve, no impact load, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-cartridge-pressure-control- valves- , aak412

made the gate valve famous in and out with perfect designing and manufacturing techniques and quality system assurance. The manufacturing experience and technique innovation have made the products reach BS, DIN and other international standards.   Metal Seated Gate Valve Features: -High reliability of strength and rigidity. -The sealing is copper alloy which is wear-resisting and has long life. -When opening, no other parts in the way. -The installation direction is various iwith the same performance.   Product Range: Standards: BS&DIN Suitable medium: water, sea water. Suitable temperature:≤100℃ Material: Ductile iron, GJS500-7. GJS400-15, GGG40,GGG50

Tilting Check Valve With Lever,Counter Weight And Hydraulic Damper -Tilting disc check valve with hydraulic damper eliminate the closing slams and water hammer for entire closing stroke. -Closing speed is adjustable depends on working conditions. -All components of the valves are designed for high stress occurred during damping effect.   Product range: Double flange tilting check valve with hydraulic damper Size range: DN100-1200mm Face to face dimensions:EN558 series 14 Test Standard-BS EN12266-1 Body-Ductile iron Disc-Ductile iron Body ring-SS304 Retaining ring-SS304 Disc ring-EPDM Shaft-SS420/SS431/SS316 Fusion bonded epoxy coating-Min 300 microns

Check valves (non-return) are installed in pipeline system to allow flow in one direction only. A swing check valve consist of a flap or disc of the same diameter as the pipe bore, which hangs down in the flow path. Check valves produce relatively high resistance to flow in the open position, due to the weight of the disc. Swing Check Valve With Lever And Weight FEATURES: DOUBLE FLANGE METAL SEATED&RESILIENT CHECK VALVE EN558-1 SERIES 48(DIN3202 F6) SIZE:DN50-300 PRESSURE: PN10-16-25-40 FLANGE CONNECTION: EN1092-2

The double eccentric butterfly valve, often referred to as a high-performance butterfly valve, is highly regarded for its minimal maintenance demands. Its primary application extends to the drainage systems of water plants, power plants, steel manufacturing, the chemical industry, water source engineering, environmental facility construction, and various other sectors. Particularly well-suited for water pipelines, this double eccentric butterfly valve serves as both a regulation and interception tool. As a double eccentric butterfly valves supplier, we provide long-lasting double eccentric butterfly valves known for their dependability, having met the stringent ISO standards.   Butterfly valves are valves which control the flow with the 90°angle turning of the disc. DISAI butterfly valves are double eccentric and rubber sealing ring is kept in place by single piece retaining ring. This design ensures 100% sealing and makes it possible to change the sealing ring without special equipment and dismantling of any parts other than retaining ring. WORKING PRINCIPLE The eccentric principle is that the stem shaft is both deviated from the valve body center,also deviated from the seat. The double eccentricity effect allows the butterfly plate to quickly detach from the valve seat when the valve is opened, greatly eliminates unnecessary excessive Disai Double Eccentric Butterfly Valve PRODUCT FEATURES -Variable choice of actuators. -Bi-directional tightness. -Drop tight shut-off at rated pressure. -Suitable for isolation and control service. -Maintenance free design. -Low operating torque requirement. -Easy installation. -Light weight and smaller volume requirement. -WRAS approval for potable water. What is the difference between double eccentric butterfly valve, triple eccentric butterfly valve and zero eccentric butterfly valve? Double eccentric butterfly valve have two offsets and are available in carbon steel, stainless steel, Hastelloy and other ANSI Class 600 rated body materials, with a variety of PTFE seats and fireproof designs with metal backed seats. Double offset butterfly valves are suitable for a wide range of applications, including high pressure and high temperature environments. have three eccentricities and are designed for demanding applications with high pressure, high temperature and corrosive fluids. Zero-eccentric butterfly valves have no offset and are suitable for low pressure, cryogenic and general-purpose applications where tight shutoff is not important.   PRODUCT RANGE -DESIGN: EN593 -SIZE RANGE: DN200-DN4000 -Face to face dimension according to EN558-1, series 13/14 -Flange connection according to EN1092-2 PN10 PN16 PN25 PN40 -Valve top flange according to ISO5211 -Closed clockwise -Internal&External epoxy coating -For medium drinking water, water, and sewage -Bidirectional

The double flanged concentric soft sealing rubber lined butterfly valve D341X integrates some advantages of eccentric flanged butterfly valve and concentric wafer butterfly valve, filling a blank between eccentric flanged butterfly valve and centric wafer butterfly valve. The flow part of the valve body cavity is designed with vulcanized rubber, and the valve seat is combined as a whole with good sealing performance. It can be widely used in water, agricultural, municipal and other fields.   Centric Butterfly Valve PRODUCT RANGE Design: EN593 Size：DN50 up to DN1200(2”-48”) Material: GJS500-7, GJS400-15 Temperature: ≤80° Pressure：PN10, PN16 Face to face dimension according EN558 series 13 flange connection according to EN1092-2 Test standard：EN12266-1 Top flange：ISO5211 Actuator：Worm gearbox, Penumatic actuator, electric actuator. Application: Products are suitable for fresh water, sea water and sewage etc. treatment system   PRODUCT FEATURES Adopt the optimized plate shaft pin free connection, effectively avoid the hidden danger of plate shaft cone pin connection leakage, and facilitate the replacement of parts on site. The valve is lined with rubber, and the rubber is vulcanized directly on the body as the injection to ensure the permanent adhesion. The use of the adhesive layer will enhance the reliability of the Disai butterfly valve. 90° opening and closing, worm gear drive, small operating torque The optimized lining design and molding process can achieve perfect lining and internal sealing of valve body, and ensure the perfect realization of valve plate seal and overall flange gasket seal. Bidirectional sealing, excellent performance, superior parts processing performance Valve plate and seat through the overall spherical seal, valve plate and seat contact more reasonable, ensure valve plate seal, reduce valve torque. The double shaft design of the valve can effectively reduce the pressure loss of the valve and reduce the flow resistance. Various sealing materials are available for users to choose The valve shaft and valve body can be precisely connected with the valve plate by increasing the design structure of the bushing, and the self-lubricating bushing can prolong the service life of the valve. The upper and lower shaft ends of the valve are specially sealed to ensure zero leakage of the outer seal of the shaft end. https://www.disaivalve.com/

LVD-100KG/LVD-100KG-6D Electrodynamic Vibration Generator Test Table is according to IEC 60068, IEC68-2-6, JJG189-97, GB/T13309-91, GB2423 and other relevant standards. • LVD-100KG: Combined the Vertical and Longitudinal total 4 directions in one test table. • LVD-100KG-6D: Combined the Vertical, Level and Longitudinal total 6 directions in one test table. Measurements: Sine Wave, Frequency Modulation, Sweep Frequency, Programmable, Frequency Doubling, Logarithm, High Acceleration speed, Amplitude Modulation, Time Control, Full-function Computer Control, simple and easy to set the acceleration and amplitude. Specifications: • Vibration table size: 500*500mm (Other size can be designed) • Vibration: 0~5mm (Adjustable range P-P). Vibration waveform: sine wave (half wave and full wave). Acceleration speed: 0~20g (Adjustable) • Maximum test load capacity: 100kg • Accuracy: Frequency can be displayed to 0.01 Hz. Precision: 0.1 Hz. • Sweep frequency function (1~600Hz): (Upper frequency, Lower frequency, Time range) It can set real standard arbitrarily to sweep frequency back and forth • Programmable Function (1~600Hz): It can set 15 segments in one test with different parameters (frequency/amplitude/time/acceleration), and it can be recycled • Frequency doubling function (1~600Hz): 15 segments multiplied-increase: 1)Low to high frequency 2)High to low frequency 3)Low to high and then to low frequency, it can be recycled • Logarithmic function (1~600Hz), 3 modes of logarithm/can be recycled: 1)Lower to upper frequency 2)Upper to lower frequency 3)Lower to upper and then to lower frequency • Measuring instrument: To display amplitude, acceleration speed and the maximum acceleration speed Why do we measure vibration? Vibration test is to simulate the various vibration environment impacts encountered by the product in the transportation, installation. This test is to simulate the various impacts encountered by the product in the transportation, installation and use environment. This kind of vibration environmental impact is used to determine whether the product can withstand various environmental vibrations.

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Product Description LS2090 LED Power Driver Test Instrument is the comprehensive test instrument for LED driver power which is according to GB/T 24825-2009 and IEC 62384:2006. It can measure the following parameters: input (AC&DC), output (AC&DC), output start (DC), Harmonic and Displacement Factor (DF). The LS2090 usually works with LISUN LSP-500VARC pure sine AC Power Source and LISUN M9822 DC Electronic Load. The LSP 500VARC provides constant adjustable voltage for the driver under test, and the M9822 is used to simulate the LED source. The software can run on Win7, Win8 and Win10, Win11. Specification: 1. Input Characteristics Test (AC) • Measures the input voltage, current, power, power factor, power grid frequency • The fundamental frequency scope of the current and voltage: 45Hz~65Hz; Narrowband range: 45Hz~5kHz; Broadband range: 45Hz~1MHz. • Voltage range: 3~300 V (CF=1.67); Current range: 5mA ~ 2.7A (CF=3); Power range: 0.015~800W; Power factor range: 0.000~1.000. 2. Input Characteristics Test (DC) • Measures voltage, current, power. • Voltage range: 3~500V; Current range: 5mA~8A; Power range: 0.015~4000W 3. Output Characteristics Test (AC) • Measures lamp voltage, lamp current, lamp power. • Lamp voltage range: 3~300V (CF=3); Lamp current range: 5mA~2.7A(CF=3); Lamp power range: 0.015~800W 4. Output Characteristics Test (DC) • Measures output lamp voltage, lamp current, lamp power, ripple wave current. • Voltage range: 3~500V; Current range: 5mA~8A; Power range: 0.015~4KW; Ripple wave current range: 5mA~2.5A. 5. Output Start Characteristics Test (DC) • Changing curve and data of the lamp voltage and lamp current within 0~2 seconds. • Lamp voltage range: 3~500V; Lamp current range: 5mA~8A 6. Harmonic Testing Total harmonic and the harmonic component of 0~50 times, wave ratio, initial phase angle, peak phase angle and the phase Angle. 7. Displacement Factor (DF) Testing The LS2090 is an update version for WT2080, the LS2090 has the Displacement Factor (DF) Testing function. P.S. The LS2090-IEC with additional software (need to add extra cost on LS2090) to fully meet EN/IEC6100-3-2:2019, please click here to see the LS2090-IEC additional Test Report Sample

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ESD simulator guns (Electrostatic Discharge Generator/Electrostatic Gun/ESD Guns) is in full compliance with IEC 61000-4-2, EN61000-4-2, ISO10605, GB/T17626.2, GB/T17215.301 and GB/T17215.322. What is a ESD test? The static electricity generated by the human body to the object or between two objects may cause the electrical and electronic equipment circuits to malfunction or even be damaged. The ESD generator is designed for the withstanding ESD performance measurement for the assessment of electrical and electronic equipment. ESD61000-2/ESD61000-2A has a LCD touch screen in both English and Chinese. What is an esd simulator gun used for? Electrostatic discharge simulator is highest electrostatic voltage can be up to 30 kv, which is enough to cover the most severe standard grade of electrostatic voltage requirement (the voltage requirements of the grade 4 air discharge electrostatic is 15 KV). The ESD test gun can be used for the most of electrical and electronic equipment for electrostatic discharge test, and also can ensure comparability and reproducibility of test.

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Temperature Humidity Chamber Thermal Chamber Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles. What is Climate Chamber? Climate chambers is used to simulate a temperature enviromental condistions, it may also be called environmental chambers or Thermal Chamber or Temperature Chamber Specifications: •The temperature humidity test chamber is made of SUS304 Steel. The thermal insulation layer is made of polyurethane hard foam ultra-fine glass fiber. The heat-insulated doorframe uses high temperature aging silicone rubber sealing strip. •The temperature controller of the climate chamber includes Korean TEMI display in English/Chinese and German Siemens PLC. It can communicate with PC via RS- 232. The temperature accuracy is 0.1ºC and humidity accuracy is 0.1%R.H •The temperature sensor is platinum PT100Ω/MV •The independant heating system uses nickel-chrome electric heater •The refrigerating system is fully enclosed air-cooled single-stage compression refrigeration mode, and the compressor is from France TECUMSEH brand which can allow you get after sales support from many other countries •The circulation system uses temperature resistant and low noise air- conditioned motor and multi-blade centrifugal wind wheel •The safety protection system includes electric leakage, short circuit, over temperature, motor overheating, compressor pressure, overload, over-current protection •Working Voltage: AC380V±10% 3phases and frequency 50Hz/60Hz •Working Environmental: Temperature is 5ºC~+30ºC Humidity ≤85%R.H How does an environmental chamber work? The temperature and humidity environmental chamber can simulate a variety of temperature and humidity natural environments, and is suitable for testing electronic devices, household appliances, food, trolleys, vulcanized rubber, plastic rubber, metal materials and other commodities. The whole process of humidification of the temperature and humidity environmental chamber is to increase the working pressure of water vapor. The more initial way is to spray water on the test box wall to control the saturation pressure of the water surface according to the operating temperature. What's Temperature Chamber quality difference between LISUN and other brands in China Market? 1. LISUN low temperature such as -60ºC warranty under a 200W lamps with heating but other brands under empty conditions. 2. LISUN adopts with Finland brand electronic humidity sensor which no need to maintenence. But our competitor used dry ball device which is easy dry to cause problems after used 3-6months. 3. LISUN equipped a water purification device, customer can use a water pipe connect it to provide water supply directly, our competitor but need to add the water by hand. 4. LISUN temperature chamber key electrical connector parts adopted with famous brand AC contactor and solid state relays from Omron brands. It is easy for you to find in your local market if they were failed, but our competitors used them with almost Chinese local brands.

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Giacomo is the purchasing manager of a German hydraulic equipment company. Last year, the hydraulic lifting platform designed by his company was very creative and needed to purchase a hydraulic pilot operated relief valve. It was originally planned to be promoted on the exhibition at the beginning of the year, but the test run was not smooth. There was vibration and loud noise during the lifting process. The problem was the hydraulic relief valve. Giacomo was confused because the valve came from an old hydraulic relief valve manufacturer who had cooperated for 5 years. According to the manufacturer, this hydraulic relief valve sample was completely made based on the drawing, and the accuracy, flow, pressure and other requirements fully comply with the original design. The engineer realized that there might be a problem in the design, and asked Giacomo to contact several hydraulic relief valve manufacturers, hoping to get some constructive suggestions. It has been a month, but no progress has been made. Giacomo suddenly remembered that during the last communication with Gerrit of Caterpillar, Gerrit mentioned that AAK Hydraulic Valve has great design ability. With Gerrit's introduction, Giacomo told me about their current difficulties, and also sent the original drawing of the hydraulic relief valve and the video of the test run. After repeated comparison and several internal discussions, AAK technical team basically determined the cause of vibration of the hydraulic relief valve and the preliminary solution. I told Giacomo that we are 90% sure, but AAK needs to redesign the hydraulic relief valve, which will take 6-8 weeks. Giacomo paid $2,000 for the development the next day. Six weeks later, AAK sent the newly designed hydraulic relief valve samples. A week later, Giacomo sent a video of the machine testing. The vibration and noise were gone, and the whole machine could rise and fall freely. Their engineers disassembled AAK hydraulic relief valve, only then did they know that AAK design was brilliant and had a sigh of "so it is". AAK adds parts to the resonant cavity of the hydraulic pilot operated relief valve, which reduces the volume of the resonant cavity and increases the stiffness of the oil under negative pressure. According to the principle that the components with high stiffness are not easy to resonate, we have adjusted the internal design of the hydraulic relief valve, added a vibration damping sleeve and a vibration damping pad to the pilot valve, and set various damping holes on the vibration damping sleeve to increase damping to eliminate vibration. The vibration damping pad can cooperate with the resonant cavity and move freely. There is a throttling groove on the front and back of the vibration damping pad, and the oil can also produce damping effect when flowing to change the original flow. Giacomo privately informed that after the successful test run, the whole team was very happy and their engineers admired him more and more. AAK hydraulic pilot operated relief valve, no vibration, no noise, you can also have a small try! https://www.aakindustry.com/info-detai , l/hydraulic-relief-valve-aak261