KM series Hand Valve General diaphragm hand valve is a manuallyoperated shutoff valve, which is applicable to one direction flow. · General diaphragm hand valve is used on the liquid, air suction or hot vapor piping of a freezer, cold store and air conditioning unit. Features: · Equipped with two pieces of stainless steel diaphragm to prevent the valve from leakage within its service life. · Nylon valve core is used and the valve could be closed with minimum torque. · It is easy to operate and just turn one circle to make the valve full open or full close.