TWO BALLS ONE BODY DBBV

TWO BALLS ONE BODY DBBV

Block & Bleed valves with two balls in one body to achieve a positive sealing in a compact design.
We offer a full range of materials in carbon, alloy and stainless steel from general to severe applications. 
Block & Bleed valves with two balls in one body to achieve a positive sealing in a compact design.

True Meaning of Double Block and Bleed

API 6D defines a double-block-and-bleed valve (DBB) as a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces.”

FEATURES 

•  1 - 3 Piece Body

•  FULL AND REDUCE BORE

•  TRUNNION MOUNTED 

•  DOUBLE BLOCK AND BLEED

•  ANTI-BLOW OUT STEM

•  ANTI STATIC DEVICE

•  FIRESAFE TO API-607/6FA

•  SPRING LOADED SEATS

•  SEALANT INJECTION ON REQUEST

•  NACE MR-01-75

SPECIFICATIONS

 API 6D, API 600, API 599, API 598, API 608, API 602, BS 1873 ASME B16.10, ASME B16.5, ASME B16.47 (Serie A and Serie B) and MSS SP44 are the key specifications covering the dimensions and the manufacturing tolerances of valves.

• ASTM A105, A182, A216, A217, A351, A352, A494 are the common materials related to valves.

• MSS SP25 covers the marking system.

• ASTM A 703 /A 703M IS Specification for Steel Castings, General Requirements, for Pressure-Containing Parts

• ASTM A 487 /A 487M is Specification for Steel Castings Suitable for Pressure Service

• ASTM A 985 /A 985M is Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts.

• API 6F is About recommended practice for fire test for valves.

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CATALOGUE.PDF