Double Block and Bleed Ball Valves

China, DBB, double block, double bleed, ball valve, Manufacture, Factory, Price, Flanged, RF, RTJ, mono, PTFE, RPTFE, Metal, seat, full bore, reduce bore, valves materials have carbon steel, stainless steel, A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, A105(N), F304(L), F316(L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminum Bronze and other special alloy. Pressure from Class 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB Double Block and Bleed Ball Valves is a ball valve with a pneumatic actuator, the execution speed of the pneumatic actuator is relatively fast, the fastest switching speed of 0.05 seconds/time, so it is usually called pneumatic fast cut ball valve. Pneumatic ball valves are usually configured with various accessories, such as solenoid valves, air source processing triplexes, limit switches, positioners, control boxes, etc., to achieve local control and remote centralized control, in the control room can control the valve switch, do not need to go to the scene or high altitude and dangerous to bring manual control, to a large extent, saving human resources and time and safety
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NSW is an ISO9001 certified manufacturer of industrial ball valves. Trunnion ball valves manufactured by our company have perfect tight sealing and light torque. Our factory has a number of production lines, with advanced processing equipment experienced staff, our valves have been carefully designed, in line with API6D standards. The valve has anti-blowout, anti-static and fireproof sealing structures to prevent accidents and extend service life. -Quality assurance: NSW is ISO9001 audited professional floating ball valve production products, also have CE, API 607, API 6D certificates -Productive capacity: There are 5 production lines, advanced processing equipment, experienced designers, skilled operators, perfect production process. -Quality control: According to ISO9001 established perfect quality control system. Professional inspection team and advanced quality inspection instruments. -Delivery on time: Own casting factory, large inventory, multiple production lines -After-sales service: Arrange technical personnel on-site service, technical support, free replacement -Free sample, 7 days 24 hours service-Full or Reduced Bore -RF, RTJ, BW or PE -Side entry, top entry, or welded body design -Double Block & Bleed (DBB)，Double Isolation & Bleed (DIB) -Emergency seat and stem injection -Anti-Static Device -Actuator: Lever, Gear Box, Bare Stem, Pneumatic Actuator, Electric Actuator -Fire Safety - Anti-blow out stem1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe segment of the same length. 2. Simple structure, small size, light weight. 3. Tight and reliable, good sealing, has also been widely used in vacuum systems. 4. Easy to operate, open and close quickly, from full open to full close as long as the rotation of 90 degrees, easy to remote control. 5. Easy maintenance, ball valve structure is simple, the sealing ring is generally active, disassembly and replacement are more convenient. 6. When fully open or fully closed, the sealing surface of the ball and the seat is isolated from the medium, and the medium will not cause erosion of the valve sealing surface when it passes through. 7. Wide range of application, small diameter to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied. High platform ball valve according to its channel position can be divided into straight-through, three-way and right-angle. The latter two ball valves are used to distribute the medium and change the flow direction of the medium.
Product Double Block and Bleed Ball Valves
Nominal diameter NPS 2”, 3”, 4”, 6”, 8”, 10”, 12”, 14”, 16”
Nominal diameter Class 150, 300, 600, 900, 1500, 2500.
End Connection Flanged (RF, RTJ), BW, PE
Operation Lever, Worm Gear, Bare Stem, Pneumatic Actuator, Electric Actuator
Materials Forged: A105, A182 F304, F3304L, F316, F316L, A182 F51, F53, A350 LF2, LF3, LF5     Casting: A216 WCB, A351 CF3, CF8, CF3M, CF8M, A352 LCB, LCC, LC2, A995 4A. 5A, Inconel, Hastelloy, Monel
Structure Full or Reduced Bore, RF, RTJ, BW or PE, Side entry, top entry, or welded body design Double Block & Bleed (DBB)，Double Isolation & Bleed (DIB) Emergency seat and stem injection Anti-Static Device
Design and Manufacturer API 6D, API 608, ISO 17292
Face to Face API 6D, ASME B16.10
End Connection BW (ASME B16.25)
MSS SP-44
RF, RTJ (ASME B16.5, ASME B16.47)
Test and Inspection API 6D, API 598
Other NACE MR-0175, NACE MR-0103, ISO 15848
Also available per PT, UT, RT,MT.
Fire safe design API 6FA, API 607

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