DJF1 reducing valve failure and repair methods

 

Requires high pressure fluid, while the need to sub-pressure fluid in the hydraulic system, often using the valve to provide a sub-pressure fluid. The action is reliable, convenient and flexible regulator, stable D-JF1 reducing valve has outstanding advantages.

1 works

D-JF1 reducing valve shown in Figure 1, the spool, body, valve seat, piston, safety valve, adjustment screw, accumulator, guide sleeve, pressure ring filter. The seat and pistons slide up and down. D-JF1 valve works: the gap throttling valve core and valve seat, so that the output pressure is lower than the input pressure; while output pressure feedback, acting on the piston, the formation of dynamic equilibrium with the gas spring force, and automatically adjusts the valve the gap between the core and the valve seat, the output pressure is kept constant. The fluid pressure changes in the course of their work, will instantly change the stress state of the piston, the piston is forced to lift. Spool suffered force is always upward, the valve spool with the piston at the same time lifting, until it reaches a new equilibrium position, thereby maintaining the constant of the regulator value.

Certain pressure of nitrogen gas within the accumulator pre-charge for the use of the gas spring. Using adjusting screw to change the accumulator pressure in order to achieve the D-JF1 regulator pressure regulator. Slowly open the inlet side of the screw, high pressure liquid enters the lower part of the accumulator, the nitrogen is compressed, the pressure increased, the piston down valve seam increases throttle weakened, the outlet pressure increases; Instead, open the liquid side screws, liquid reduced, the pressure drops, the moving piston and the outlet pressure is reduced.