Learn About Steam
Boiler feedlines - The check valve is used to prevent boiler water being forced back along the feedline into the storage tank when the feedpump stops running. Furthermore, a disc check valve with a heavy-duty spring and a soft seat can be fitted in the boiler feedline to prevent flow under gravity into the boiler when the feedpump is shut off. Steam traps - Other than with steam traps discharging to atmosphere, check valves should always be inserted after a steam trap to prevent back flow of condensate flooding the steam space.
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