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block and bleed ball valve

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Product Summary

Block and bleed ball valve is a valve of the double block and bleed type construction comprises a first valve assembly housing a first ball valve and a second valve assembly housing a second ball valve. The first and second ball valves are independent between open and closed positions. Each of the ball valves is held within the particular valve assembly by an annular retainer component.

The invention of block and bleed ball valve to which this application relates is an improved valve construction. In particular the invention is related to improvements for the type of valve known in the trade as a double block or a double block with bleed valve. This type of valve is used in pipelines as an isolation valve and comprises first and second ball valve assemblies in an in line configuration. The provision of the two ball valve assemblies means that if one of the assemblies fails there is still another valve assembly operational.

Block and bleed ball valve have evolved to replace and add the process of bolting together individual valves to make the valves in one body. It saved a lot of space and material; it is the development tendency of the valve in the future.

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