Steam/Water Mixing Valve - MkII
2020-3-26 · water supply. MkII valves were supplied from 2002 onwards. Operation The mixing valve employs a piston to lift and open the steam valve. The piston is lifted by the cold water supply. If the cold water supply stops the piston will fall, closing the steam valve. To sustain this design integrity the piston must move freely. Scale build-up will
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