Double Block and Bleed Valves - Bonney Forge Corporation
DOUBLE BLOCK & BLEED - TRUNNION TYPE Trunnion ball valve have a mechanical means of anchoring the ball at the top and the bot-tom this design is the standard design applied on larger and higher pressure valves. Sealing is achieved by spring loaded piston type seats which shut off flow when line pres-sure acts on the upstream seat. Automatic
Get Price