Pipeline ancillaries Disc, split disc and wafer check valves
10
Blowdown vessel
When a blowdown vessel receives blowdown from more than one boiler, a DCV wafer check valve should be installed on each separate blowdown line. This will prevent the blowdown from one boiler flowing back into another boiler. In many countries this is a statutory requirement.
Flash vessel
7.5.36
The DCV wafer check valve installed at the flash steam outlet from the flash vessel, ensures that steam from the make-up valve does not flow back into the flash vessel. The DCV wafer check valve after the FT steam trap ensures that condensate does not flood back up into the flash vessel.
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AI-P134-33 ST Issue 2
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DCV Wafer Check Valve Applications Sheet 3
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