Forged Steel API 6D Double Block and Bleed Ball Valve

DBB BALL VALVE

QDV's DBB valves are widely used in gas process or transportation industry for conventional on-off, emergency shut off and quick opening and controlling the flow. Top flange is designed per ISO5211 for easy amount various type of actuator.

SPECIFICATION

*Design standard:ASME B16.34

*Length of structure:ASME B16.10

*Flange connecting end:ASME B16.5

*Butt welding connecting end:ASME B16.25

*Wall thickness:ASME B16.34

*Fireproof test:API 607/BS6755

*Inspection and test:API 598

*Pressure and temperature rating:ASME B16.34

*Product scope:NPS 1/4’’~3’’,CL150~CL600 

*Main body material:A105,LF2,F51,F304,F316,Monel Alloy 400

*Drive device:Lever, Worm wheel, Electric, Pneumatic etc.

Features

*Two piece body design-minimize leakage paths

*Designed to comply with requirements of ANSI/ASME B16.34

*Bi-directional

*Ball seats choice of seat materials:PTFE(virgin or filled)PVDF,Nylon or PEEK

*Bubble tight shutoff

*Floating ball principal with dynamic response seats featuring inherent self relief.

*Anti blowout stem

*Integral compression ends available eliminating taper threads and thread sealants

*Low torque operation

*Connector thread environmentally sealed.

*Anti static design as standard

*Firesafe designed to meet BS6755 Part2/API 607