Double Block and Bleed valves are designed to replace traditional pipe valve connected to the complex forms. Reduce the leak in the system, quickly realize the emissions off function.
Double Block and Bleed valves to maximize the saving of installation space. Simplifies the installation process. Reduce the pressure of the pipeline system. Convenient instrument cleaning and maintenance, and reduce costs.
Products are widely used in the hydraulic system piping in power, petrochemical, metallurgy, marine, petroleum, natural gas, gas, pharmaceutical and other industries
Diameter: 4 "- 24" (100 - 600mm)
Valves pressure: 150LB - 2500LB (1.6MPa-32Mpa)
DBB valve technical standards:
Design standards according to API 6D
Length of the structure according to ASME B16.10
Connecting flanges according to ASME B16.5
Test and inspection by the API 598
Parts and materials of Double Block and Bleed valves:
Body: WCB, A105, LCB, LF2, A217 WC6, A351-CF8, A351-CF8M
Ball: A105, LF2, F11, A182-F304, A182-F316
Stem: A182 F6a, F304 F11, F304, F316, 17-4PH
Seat: A105 + ENP the A350-of LF2 + ENP F11 to A182-F304 A182-F316
Seal: PTFE, RPTFE, VITON, PEEK, NYLON, 13Cr hard face, stellite 6, tungsten carbide coating, Ni60 material