JH644X pneumatic piston type quick opening sludge discharge valve is an angle-type shut-off valve actuated by hydraulic or pneumatic power. It is usually installed in rows on the outer wall at the bottom of sedimentation tanks to remove sand and sludge deposited at the bottom of the tank. The piston in the hydraulic cylinder of this valve is an L-shaped leather cup, which has good sealing performance and is durable. The valve seal also adopts rubber sealing with no leakage. Remote control can al