Design Features

1.Full Bore design for pipe pigging
2.Double block and bleed structure (DBB).Double seat, bi-direction seal, first soft sealing and second metal to metal sealing .
3.Optional soft seat+O-ring or metal seat+Graphite sealing structure 
4.Casting body,casting or forging wedge,forging seat ring
5.Fire-safe design in compliance with API 607/API 6FA 
6.Optional single plate or double plates.
7.Cavity self-relief under overpressure. Drain hole at the bottom.
8.With stem back seat.Doubel seals with packing and O-rings. Seat and stem are with emergency sealant injector. 
9.Easy operation, long life cycle.

Product Range

Size/Rating: 2″～48"/Class 150Lb～2500Lb
Structure: single plate, double plates
Trim: Soft Seat, Metal Seat
Operation: Lever, Gear Box

Design Standards

Basic Design: API 6D, ASME B16.34
End Connection: ASME B16.5, ASME B16.47, MSS SP-44
Test & Inspection: ISO 5208, API 6D