Back flow prevention device for pipelines conveying fluids

Details Back flow prevention device for pipelines conveying fluids Back flow prevention device for pipelines conveying fluids

2005-08-16

2005-08-16

Rivell, John (Department: 3753)

Fluid handling

With repair, tapping, assembly, or disassembly means

Assembling or disassembling check valve

C137S454200, C137S515000, C137S541000

Reexamination Certificate

active

06929023

ABSTRACT:
A back flow prevention device is shown for use in a plastic pipeline for conveying water, sewage, hydrocarbons or other fluids. A valve body features a flow control mechanism which is formed entirely or primarily of plastic materials. The valve body and its opposing ends are formed of a plastic material which is compatible with the plastic material of the existing pipeline, whereby the valve body can be installed in the pipeline in co-axially fashion by directly joining the opposing ends of the body to the opposing mating pipe ends at a selected location within the pipeline.

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