PFF серии задвижка (API 6A)

PFF Series Gate Valve♦ Rising stem structure can indicate open and close of valve, the balance stem can balance the stem load, reduce load of stem thread and bearing under pressure.♦ Full bore design eliminates efficiently pressure drop and vortex, and eliminates washing by solids in fluid♦ Metal-to-metal seal is used between bonnet and body, gate and seat, body and seat♦ The surface of gate and seat is weld overlay with hard alloy, which has feature of corrosion resistance and washing resistance♦ The bonnet and stem designed with back seal, can replace stem seal ring under pressure♦ One side of bonnet is designed with sealant injection in order to supply sealant and improve seal and lubrication performance of gate and seat♦ Can complete with different pneumatic (hydraulic) actuator upon user’s requirements♦ Working Pressure:2000Psi 20000Psi ♦ Nominal Bore:1-13/16” 9”(46mm 230mm) ♦ Working medium:Oil. Natural gas. Mud ♦ Working temperature:-46°C 121°C(Class L.U) ♦ Material Class:AA,BB,CC,DD,EE,FF,HH ♦ Specification level:PSL1 PSL4 ♦ Performance Requirements:PR1 PR2