Double Block and Bleed Ball Valve

Waits is able to produce and supply double block and bleed ball valves to the world market. We were founded in the United States in 1994, and established a Chinese branch in 2008. Today, our global headquarters is located in Wenzhou. Our valve production base can design and produce according to actual working conditions. This ball valve is widely used in oil field projects in the Middle East and Southeast Asia.

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Product Description

If you want to implement the double block and bleed ball valve concept, you need two in-line isolation valves and bleed valves to vent or drain the fluid trapped between the two closed elements in order to safely isolate the downstream pipeline. This function can be achieved with a single double block and bleed ball valve with a bleed port between the two balls.

Implementation Standards

Design Standard	API 6D, API 608, ISO 17292, GOST
Flange standards	ASME B 16.5, ASME B16.47, ASME B16.25
End Connecction	RF, RTJ, BW, etc.
Inspection & Test	API 598, API 6D
Face to Face	API 6D, ASME B16.10
Pressure and temperature levels	ASME B16.34
Fire Safe	API 6FA, API 607
Low Leakage	ISO 15848-1, API 622
Anti-corrosion design	NACE MR 0103, NACE MR 0175

Application

Size	1/2"-24", DN15-DN600
Pressure Rating	Class 150-2500, PN10-PN420
Operating Temperature	Soft Seat: -60~200°C, Metal Seat: -60~450°C
Application range	Petroleum, chemical industry, metallurgy, light industry, power stations, urban construction water supply, low temperature working conditions, and long-distance pipelines such as oil, gas and natural gas.
Operator	Lever, Gear, Electric, Pneumatic, etc.
Body Material	Carbon Steel, Stainless Steel, Duplex Stainless Steel, Alloy Steel, Monel, Al Bronze, etc.
Ball	Sphere： CS+ENP, A182 F304, F304L, F316, F316L, F51, F53, CS+TCC, CS+Ni60
Valve seat support ring	Seat support ring： CS+ENP, A182 F304, F304L, F316, F316L, F51, F53, CS+TCC, CS+Ni55
Valve seat insert	PTFE, RPTFE, Nylon, Devlon, PEEK
Valve stem	A182 F6a, F316, F51, A105+ENP, AISI 4140+ENP, 17-4PH

Performance Features

1.Save space and weight, reduce costs in the use, installation and subsequent maintenance of double block and bleed ball valves
2.Minimize leakage paths
3.Improve line structural integrity
4.Overall improve system reliability
5.Explosion-proof/blow-out-proof stem design
6.Fire-proof and anti-static design
7.Independent ball stem
8.Automatic release/double piston effect
9.Floating valve seat, made of soft or metal valve seat

Double Block and Bleed Ball Valve