Stainless Steel Double Bleed and Double Block (DBB) Ball Valves

Double Block and Bleed
Double Block and Bleed Ball Valves are aimed to get a double barrier on the piping, and bleed the fluid trapped between the two balls from a dedicated drain line. Body construction can be either forging or centrifugal casting. Wide range of materials: carbon steels, austenitic or martensitic SS, duplex-superduplex SS, nickel-based alloys.

Valve design can be either Trunnion or Floating type, anti blow-out stem and typically SPE seat design. Drain port is normally provided with a floating ball valve, to be fitted with Final User drain line. Valve seats can be soft or metal to metal hard-faced.

Size range(s): NPS 1/2 - 2 (DN 15 - 50)
Pressure rating: ASME Classes 150 - 2500
Standard connections: Threaded, socket weld, flanged

Material Selection for Gate Valves:

• Carbon Steel (A105)
• Low Temperture Carbon Steel (LF2)
• Stainless Steel (SS304, SS304L, SS316, SS316L, SS347, 904L)
• Low Alloys (F1, F11, F22)
• High Alloys (F5, F9,F91, F62, F20 )
• Duplex & Super Duplex (2205, 2507, S32760)
• Bronze (C95800, C95500, C95400)
• Inconel (Inconel 625, Inconel 825)

Beijing Silk Road Enterprise Management Services Co.,LTD. is a professional manufacturer of Trunnion Mounted Ball Valve, Pneumatic Actuated Ball Valve, Flange End Ball Valve and Soft Seated Ball Valve.