The sealed body construction is designed for applications where no leakage of the flowing medium through the valve body is allowed to the environment. The PVS model has proved especially successful in high pressure applications due to the extremely resistant body construction. The sealed body can be equipped with an alarm or piping to ensure that the sleeve rupture can be noticed immediately.� The PVS structure has no rising parts outside the body. The body materials can be chosen from cast iron/mild steel, aluminium or AISI316. Technical specifications Size range: 15~2000mm, �½~84in Pressure range: 1-10MPa, 1:2 safety factor, which means bursting pressure is 2 times higher than the operating pressure. Material of valve body DN15~200 (carbon steel, ductile� iron, aluminum alloy, stainless steel-casting process) DN250~2000 (45#steel, stainless steel welding technology ) Material of valve sleeve: NR, EPDM, CR(chloroprene rubber), NBR, butyl rubber, FPM, Hypalon rubber. Working status of pinch valve Fully-open: the full-bore elastic valve sleeve of pinch valve without any gaps & dead spots. Center closed: closed on the center line of the valve body, which avoids turbulence and abrasion, as a result, the valve sleeve becomes a smooth and enclosed venturi with self-cleaning during every operation. Fully-closed: it ensures the pinch valve is with no leakage of two ways when shut off, and the safe design of inner valve sleeve requires no maintenance of sealing elements.
