Hydraulic Cartridge Pressure Control Valve with 450bar pressure resistance, AAK's service life is twice that of its peers

China [CN]

Gallagher is from a hydraulic equipment manufacturing company in Brazil. His purchase has been smooth, but a hydraulic cartridge pressure control valve stumped him. In the second half of last year, they purchased high-pressure hydraulic cartridge pressure control valves for hydraulic power units. About half a year later, a customer complained that the hydraulic cartridge pressure control valve was leaking. According to the feedback from the original hydraulic cartridge pressure control valve manufacturer, the leakage was caused by ultra-high pressure 450bar and it can only be replaced with new one. Gallagher realized that the service life of the hydraulic cartridge pressure control valve produced by the original manufacturer was only 6 months, and the customer required at least 1 year. Gallagher contacted other cartridge valve manufacturers, but none of them was able to guarantee the service life of 1 year for the hydraulic cartridge pressure control valve that is resistant to ultra-high pressure of 450bar. Gallagher was worried.

Gallagher found AAK website on B2B, noticed many customer cases related to hydraulic cartridge pressure control valves, and sent an email asking: Can AAK ensure that the hydraulic cartridge pressure control valve withstand ultra-high pressure 450bar working condition, and the service life is more than 1 year? According to the hydraulic system schematic diagram and the original production drawing of the hydraulic cartridge pressure control valve, AAK engineers found that the pressure relief method has a great impact on the valve, will consume the valve life, and is easy to leak. Gallagher asked AAK to make samples. After 35 days, AAK delivered 30 hydraulic cartridge pressure control valves.

Last week, Gallagher informed us by email that AAK hydraulic cartridge pressure control valves had been used for 9 months, and no customer complained about leakage. The boss asked to purchase in bulk from AAK to replace the original hydraulic cartridge pressure control valves. I told him that 1 year's life is our basic requirement. He told me that his boss valued the service life of AAK hydraulic cartridge pressure control valve. The other cartridge valve manufacturers can only guarantee a service life about 6 months, while AAK could last more than 1 year.

The pressure relief mode of this hydraulic cartridge pressure control valve, is optimized from the following 3 points:

1. The valve body of the hydraulic cartridge pressure control valve is divided into the upper valve body and the lower valve body, and then sealed and fastened with bolts to form the valve body. One end of the valve hole of the upper valve body is used as the pressure fluid inlet, and one end of the valve hole of the lower valve body is used as the pressure fluid outlet. 

2. The valve hole of the upper valve body is close to the contact surface of the upper and lower valve bodies to form a variable diameter hole section larger than the diameter of the valve hole, and a sealing ball is set in it. The sealing ball is located on the valve hole port of the lower valve body. The sealing ball and the valve hole port of the lower valve body form a sealing pair. The upper part of the sealing ball is a return spring located in the variable diameter hole section.

3. The valve hole on the lower valve body is a folded hole composed of a vertical section and a horizontal section. The lower bottom surface of the lower valve body is provided with a control hole which is connected with the vertical section of the folded hole and coincides with the axis. 

The optimized hydraulic cartridge pressure control valve, when the piston rod of the hydraulic cylinder rises, the piston rod lifts the sealing ball, and the valve is in the state of pressure relief. The pressure relief medium flows out from the pressure fluid inlet along the valve hole through the spring, sealing ball, and pressure oil outlet to realize pressure relief. When the piston rod moves down, the sealing ball moves down to form a seal with the valve hole port of the lower valve body and stop pressure relief. This pressure relief method is conducive to the service life of hydraulic cartridge pressure control valve, which is guaranteed for 1 year.

AAK hydraulic cartridge pressure control valve, ultra-high pressure 450bar, and safe for 1 year, welcome to try it!

https://www.aakindustry.com/info-detail/cartridge-pressure-control-valves-aak470