JM744X, JM644X diaphragm type hydraulic and pneumatic quick opening mud valve, a hydraulic or pneumatic source source for actuator valve angle truncated class. Usually installed in the outer rows of the sedimentation tank bottom sidewall to exclude precipitation of silt and dirt bottom. The valve is made of nylon reinforced rubber diaphragm valve is divided into two chambers, connected to a hydraulic or pneumatic source, the use of electric or manual two-way valve control to achieve rapid mud. Replace the valve diaphragm piston friction-free movement, more suitable for mud and other granular media, greatly improving the life of the valve.