Production Range
Our Double Block & bleed valves provide cost saving by means of reduced weight, reduced installation costs, fewer leak paths and hence improved safety and reduced maintenance.
Sizes
- 1/2″ upto 8″
Pressure Ratings
- 150# upto 2500#
Benefits
Wafer valves are designed to centre itself within the bolt circle by using the valve’s outside diameter. Lug type body design have provision for drilled holes or drilled & tapped holes, and can be used for dead end service. Double flanged valves have integrally cast flanges with the body.
Design & Construction features
Design Options
PHBB can offer a wide variety of Body, Disc and Stem materials to suit specific customer requirements viz. Carbon steel, Stainless Steel, Duplex and Super Duplex, Aluminium Bronze, Monel, Inconel and other super Alloys. Materials meeting NORSOK M650 specification can be supplied with QTR.
Body Sealing & Stem Sealing Design
Self-lubricating bearings provide excellent stem support and shaft alignment. Bonded to the interior of the stainless steel bearing is PTFE impregnated with woven fibreglass.
Design and Manufacturing Standards
PHBB Double offset Butterfly valves, meet the following
International Standards : API 609 Category B, EN 593,
ASME B16.34, ASME B16.5, ASME B16.47, ASME
B16.10, EN 12516-1 & 2, ISO 5211
Benefits
Our DBB’s can be very effectively used in critical applications like instrument take offs, sampling systems, chemical injection and severe applications.
Design & Construction features
Design Options
Our DBB’s can be manufactured in different variations whilst maintaining the main blockage device as a ball, the bleed device can be designed to suit customer requirement with needle, gate, and globe options available. The DBB valve can be manufactured in both Floating and Trunnion types, exotic materials and any combination of end connections.
Body Sealing & Stem Sealing Design
Our body seal & stem seal design is modular. We are able to therefore meet our customers sealing specifications including lip seals and other sealing options.
Actuation Ready Design
Our ISO top mounting design reduces the time and cost of actuation. Uniform torques provide prolonged cyclic life.
Body Design
The DBB valve features a sturdy design, positive stops and position locking arrangements to ensure high level of safety and performance.