Filter type relief pressure valve

The utility model provides a filter type relief pressure valve, including have water inlet and delivery port the valve body be equipped with the valve core case on the valve body, the valve core case cavity runs through from top to bottom, be equipped with piston type valve core in the valve core case cavity, the valve core case bottom is equipped with the internal thread, it screws up on valve core case bottom is equipped with the internal thread to be equipped with down the valve cap, the valve cap is equipped with the sealing rubber circle with the valve body terminal surface down, the passageway that is equipped with on the valve body of water inlet, when piston type valve core reciprocates, the passageway can change the size of discharge, the circumference wall portion of valve core case cavity is equipped with fixed step, it is equipped with the filtration screen panel to fix on the up end of fixed step and valve cap down. The utility model discloses the fixed filtration screen panel that is equipped with on the terminal surface on fixed step and the valve cap down, the water of water inlet pass through passageway on the valve body and get into and filter the screen panel and can be filtered totally by the quilt, and the filter effect is good, its long service life, dependable performance.