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For the Hydraulic Check Valve with length diameter ratio of 25:1, AAK uses 3 points to distinguish from the peers

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Update time : 2022-08-20 22:10:17

For the hydraulic check valve with the length diameter ratio of 25:1, Andrew contacted with more than 20 hydraulic check valve manufacturers online and offline in 1 week, but none of them was willing to offer. The boss was very dissatisfied and Andrew was very headache.

 

Andrew from Spain left a message on AAK Hydraulic Valve website some time ago: can you make samples for a hydraulic check valve with a length diameter ratio of 25:1? After communication, we learned about his current purchasing situation. Because he saw on B2B that AAK published an article on the length diameter ratio of a hydraulic relief valve, then he contacted us with a try attitude. According to Andrew's drawings, it is a long and thin shaft hydraulic check valve with very complex structure. No wonder no hydraulic valve manufacturer is willing to offer. I told him that this hydraulic check valve has a length to diameter ratio of 25:1, which was 5 times that of conventional valves, and it was difficult to cut. Especially in terms of accuracy, it was very particular about equipment, operators and technology. We are willing to make samples. If AAK sample fails, there is no need to find the hydraulic check valve manufacturer in Ningbo.

 

Andrew may have no choice but to accept the sample first and then quote. After 10 days, AAK sent 3 hydraulic check valve samples. The key to machining the thin and long shaft of this hydraulic check valve is how to control the thermal deformation of the workpiece. During cutting, the workpiece is high in temperature and easy to deform. On the 3rd day after Andrew received the samples, he informed by email that his team had approved that AAK hydraulic check valves not only had the length diameter ratio of 25:1 in place, but also had the surface roughness and geometric accuracy up to standard.

 

For hydraulic cartridge valves with large length diameter ratio, AAK has accumulated the following 3 experiences after years of exploration:

 

1. Drill and fixture: long drill to be matched from hardness, heat resistance and impact toughness. When the clamping method of one clamp and one top is adopted, the elastic movable center is also used to compensate the thermal deformation and elongation, so that the elongated shaft can be freely extended after being heated to avoid thermal deformation.

 

2. Cutting amount and cutting fluid: according to the length diameter ratio, the drilling amount is reasonably selected. This is a skill. During cutting, the cutting fluid shall be poured sufficiently to suppress the rise of the working temperature and thus the thermal deformation.

 

3. The tool shall be kept sharp and the tool changing frequency shall be increased to 3 times. It can effectively reduce the friction heat between the tool and the workpiece, and control the thermal deformation from the source.

 

This morning, I received the PO for this hydraulic check valve from Andrew. He told me that although the customer complained that their quotation was slow, they were the fastest and the only supplier of the sample success at only one time.

 

AAK hydraulic check valve, with unique skills on the length diameter ratio, welcome to try!

 

AAK HYDRAULIC CARTRIDGE VALVES (324) 2022-08-20

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