Electric railway journal . ccurate steamgauges. Also prevent steam being turned into a cold boiler,which is a safeguard while men are working inside of same. 4. Act as a regular hand-stop
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Non-Return Valves for Boilers - Boiler Blog | Nationwide Boiler Inc. - Nationwide Boiler Inc.
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Cast Iron Medium Pressure Non Return Valve, For steam, Flanged
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Accessible Feed Check Valve in Bronze / Cast Iron / Ductile Iron