Double O-ring shaft seal design to prevent leakage through shaft packing.
Emergency sealant injection device is designed to prevent leakage through shaft.
Blow-out proof design shaft is with gasket at the shaft bottom to keep back seat tightness.
Spring loaded seat design to ensure good tightness even under low differential pressure.
It is with fire safe design. When the soft material is destroyed the metal seats will be pushed to the ball by spring with metal tightness to prevent the leakage through seats.
Body linkage flange tightness is ensured by both O-ring and gasket.
Nominal Diameter: DN50-DN700, 2”-28”
Pressure Rating: PN10-PN100, Class150-1500
Face-to-face Dimension:
End Connection: RF Flanged
End Dimension: ASME B16.10
Leakage Class:
ANSI/FCI70.2-2006 Class IV/100;
ANSI/FCI70.2-2006 Class V;
ANSI/FCI70.2-2006 Class VI;
ISO5208 Rate D;
ISO5208 Rate A;
API 598.
Applications:
Widely used in Chemical, biochemistry, pulp & paper, chemical fiber, pharmaceutical, environmental protection, etc.