LVF阀门

The pilot pressure reducing valve is composed of valve body, main spring, main valve core, main valve seat, piston, pilot spring, pilot valve core, pilot valve seat, pilot piston and adjusting spring. Screw the adjusting screw, compress the adjusting spring, open the pilot valve core, and the medium enters above the piston from the inlet side. Because the piston area is larger than the area of the main valve core, push the piston downward to open the main valve. The pressure of the spring is adjusted by the pressure balance behind the valve to change the opening of the pilot valve, so as to change the pressure above the piston, control the opening of the main valve core to keep the pressure behind the valve constant.

Compared with the direct acting pressure reducing valve, the remote control port of the pilot pressure reducing valve has an important function, that is, it is connected to another remote pressure regulating valve through the oil pipe (the structure of the remote pressure regulating valve is the same as the pilot control part of the pressure reducing valve). By adjusting the spring force of the remote pressure regulating valve, the hydraulic pressure at the upper end of the main spool of the pressure reducing valve can be adjusted, so as to remotely regulate the outlet pressure of the pressure reducing valve, However, the pressure that can be adjusted by the remote pressure regulating valve shall not exceed the adjustment pressure of the pilot valve of the pressure reducing valve itself.