AAK Hydraulic Cartridge Relief Valve has a buffering function, and is easy to operate, which solved the problem that troubled Clinton

China [CN]

Clinton, from Mexico, has purchased hydraulic valves from China for 6 years, and has cooperated with AAK in several non-standard hydraulic cartridge valves. Some time ago, some customers complained that their logistics transmission equipment was not easy to operate. After the after-sales inspection, it was found that the hydraulic cartridge relief valve on the rotary device failed to buffer and the pressure regulation was not smooth. The original manufacturer said that this hydraulic cartridge relief valve was benchmarked to the standard parts of HydraForce, and he was unable to optimize.

Clinton contacted me and asked me how to make the hydraulic cartridge relief valve easy to adjust pressure and have buffering function. According to the hydraulic schematic diagram and the original hydraulic cartridge relief valve drawing provided, AAK engineer found that the requirements can be met as long as the original structure is improved. After 35 days, AAK sent 20 samples of hydraulic cartridge relief valves.

Last week, Clinton sent a PO for 200 hydraulic cartridge relief valves. He said that when AAK hydraulic cartridge relief valve was installed, the customer no longer complained. It not only provided convenient pressure regulation and effective buffering, but also improved the stability of the equipment. They planned to replace the whole batch of equipment with AAK hydraulic cartridge relief valves.

AAK hydraulic cartridge relief valve, the spool, buffer piston and pressure regulating valve housing cooperate to achieve buffer overflow effect, and the overall performance is reliable and stable, mainly from 3 unique structures:

1. The valve housing is provided with a first oil port, and the valve seat is provided with a second oil port. The valve spool can move axially, and the front end cooperates with the rear port of the valve seat to control the on-off between the second oil port and the first oil port. The channel port in the front end of the valve spool is provided with a plug, and the plug is axially provided with a damping hole. The front end face of the valve spool is equipped with a filter screen, and the front pressure surface of the valve spool is larger than the rear pressure surface.

2. The inner cavity of the front end of the pressure regulating screw nut has a buffer piston, and the rear end has a guide part. The radial bulge in the middle forms a convex ring part. The axial opening in the front end matches with the rear end of the valve spool. The oil supply in the middle of the convex ring part is with the connecting channel outside the rear end. 

3. The pressure regulating screw is hollow at the rear end of the valve spool to form an inner cavity, which can move axially and change the axial force of the spring. The inner cavity wall of the front end of the pressure regulating screw is matched with the front end face of the convex ring to limit the buffer piston to move forward.

For the optimized hydraulic cartridge relief valve, when the pressure at the second oil port rises instantaneously, the valve spool opens the overflow valve, so that the opening pressure of the valve is low, and the oil flows from the second oil port to the first oil port and fills the valve cavity. The oil in the inner chamber flows into the inner chamber of the buffer piston through the damping hole. If the pressure in the inner chamber of the buffer piston increases, the valve spool can be closed to generate secondary pressure, and the valve spool can be opened to overflow again to realize the buffer overflow function.

AAK hydraulic cartridge relief valve, has buffer and is easy to operate. You can also try it!

https://www.aakindustry.com/info-detail/cartridge-relief-valves-aak475