Early last month, I saw an email from Mark, the purchasing manager of hydraulic system of Caterpillar, an old friend of ours. The subject of the email is "I need help from AAK, I believe". After reading the email about hydraulic threaded cartridge valve, I understood Mark's embarrassment.
A small less-known excavator designed by them at the beginning of this year was not smooth in the commissioning process, the response of the excavation part was slow and the power was not enough. After testing, the technical department found that the measured value of the maximum overflow pressure was lower than the specified value, so it was determined that there was a problem with the hydraulic threaded cartridge valve. Mark communicated with the original hydraulic valve supplier. The supplier mentioned that the hydraulic threaded cartridge valve was sampled according to their company's drawings, and all parameter tests were up to standard. The supplier told the fact. He then could only patiently communicate with the design department to see how to modify the hydraulic threaded cartridge valve design, but the design Department said that there was a problem with the installation of the technical team. The company's design and technology departments prevaricate with each other and Mark are caught in the middle, which is very embarrassing and time is also being wasted. If the owner is angry one day, it is estimated that all 3 parties will be criticized.
AAK HYDRAULIC VALVE has always been Mark's most trusted supplier of hydraulic valves. I asked Mark to send us the original design drawings of the hydraulic threaded cartridge valve and the working condition requirements of existing equipment, as well as the problems and data encountered in commissioning.
3 days later, we replied to Mark that we have a new design scheme, and we are 90% sure that we can make the hydraulic threaded cartridge valve that meet the equipment requirements, but it will take 2-3 weeks. On the 3rd day after receiving our sample of the hydraulic threaded cartridge valve, Mark happily informed us that the technical department tested AAK hydraulic threaded cartridge valve, the equipment commissioning was smooth, and the reaction and power of the excavation part were normal. The technical department said that the large goods of this hydraulic threaded cartridge valve can only come from AAK, and other hydraulic valve manufacturers are unreliable.
Caterpillar designers are also curious about how AAK HYDRAULIC VALVE redesigns this hydraulic threaded cartridge valve? AAK engineering team tried 30 times to design, sampling and make adjustment to find a breakthrough. A sealing ring groove is arranged between the oil replenishment outlet and the oil replenishment inlet of the oil replenishment valve seat of the hydraulic threaded cartridge valve.
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Bauer is a purchaser of American PowerTeam company. In recent years, the purchasing of hydraulic valves has been smooth. Last October, PowerTeam received a test order for a hydraulic power unit from a South African customer. The customer requires to receive the prototype in the shortest time. If the prototype test is normal, there will be a series of orders later. The boss attached great importance to it and asked the technical team to design and develop it. What the engineers are most worried about is that the use frequency of the hydraulic power unit is twice that of the conventional one. Therefore, the durability of the hydraulic threaded cartridge valve used should be at least more than 2 million times. According to the parameters and working conditions of the hydraulic threaded cartridge valve, Bauer contacted more than 20 new and old hydraulic valve manufacturers. After one-to-one communication, he selected 5 hydraulic valve manufacturers to make samples for testing. 20 days later, Bauer received 6 samples of hydraulic threaded cartridge valves. After the engineers installed and tested, none of the hydraulic threaded cartridge valves could pass the durability test for 2 million times. Bauer had a second round of communication with the manufacturers, 3 of the hydraulic valve manufacturers said they would re-sample the hydraulic threaded cartridge valve. After the second round of testing, although the durability of hydraulic threaded cartridge valves has been improved, they have not reached 2 million times. Bauer was embarrassed. He might have killed the big order. After communicating, the manufacturer advised that there was nothing he could do. Bauer was very worried and had to try his luck with a new hydraulic valve manufacturer. He found AAK hydraulic valve on Google and searched AAK. After browsing, Bauer thought that AAK might be able to successfully sample this hydraulic threaded cartridge valve. After receiving the working condition requirements and drawings of the hydraulic threaded cartridge valve from Bauer, AAK engineer made analysis and determined that they were more than 95% confident to make it successfully. After 2 rounds of testing, the engineer defined the production process of proofing and circled the technical difficulties. After 20 days, AAK sent the samples of the hydraulic threaded cartridge valve. Unexpectedly, 2 months after the samples of hydraulic threaded cartridge valves were sent, we received the official order of 600 hydraulic threaded cartridge valves from Bauer. Bauer said that the equipment commissioning of South African customer was successful and the operation was stable, they were very satisfied with the quality of PowerTeam. The owner was very satisfied that Bauer found such a great hydraulic valve manufacturer and designated AAK as their exclusive supplier of hydraulic threaded cartridge valves.
The opening and closing characteristics can reach 95% opening rate and 90% closing rate, the operating pressure swing is not greater than ± 0.1MPa, and the design service life is more than 1 million times. For this high precision, high stability and high durability 3-high hydraulic threaded cartridge valve, Jacob is surprised that the AAK hydraulic valve is successful in one-time sample, while most hydraulic valve manufacturers are not able to do at all. Jacob is a purchaser of Intermot company in Italy. The company has a newly developed hydraulic motor, which needs to use hydraulic threaded cartridge valve. This motor is a high-frequency operation and has strict requirements for various parameters, especially for the parameters of hydraulic threaded cartridge valve, which has 3 high requirements of high accuracy, high stability and high durability. The owner asked Jacob to complete the procurement of this batch of hydraulic threaded cartridge valves within 60 days. He selected 4 from the original hydraulic valve suppliers to make samples. After installation, it was found that the opening and closing characteristics of hydraulic threaded cartridge valves can only reach 90% opening rate and 85% closing rate, which is 5% lower than the parameter requirements. Even the operating pressure swing of some hydraulic threaded cartridge valves exceeds 0.2MPa. In the last step testing, only 2 or 3 samples can be intact after 1 million durability tests. If all three requirements should be reached at the same time, nearly none of the samples meet the standard. Due to the limitation of equipment, the original manufacturer said it was difficult to improve significantly. Jacob learned about AAK hydraulic valve under the introduction of its peers. After browsing AAK website (www.aakindustry. com), he felt that the AAK hydraulic threaded cartridge valve might help him. After receiving the parameter requirements and drawings of his hydraulic threaded cartridge valve, we found that the requirements of this hydraulic threaded cartridge valve are not simple, but our technical team needs to chew this hard bone and gave reply to Jacob that if it goes well, the samples of the hydraulic threaded cartridge valve can be sent within 20 days. On the contrary, it needs more time for proofing. Jacob hopes that AAK hydraulic threaded cartridge valve sample will be successful, which just meets the delivery time required by the owner. After 15 days, AAK sent the hydraulic threaded cartridge valve samples successfully. After installation and test by the engineer, all parameters of the hydraulic threaded cartridge valves are qualified and meet the 3 high requirements of high accuracy, high stability and high durability. After 25 days, the shipment of the hydraulic threaded cartridge valve was delivered as scheduled.
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