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Erie 2 way zone valves

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Steve_210
Steve_210 Member Posts: 664
in THE MAIN WALL
Having some noise problems with Erie 2 way zone valves. Pretty sure it is velocity noise.  When I remove the head (actuator) noise stops completely, but when you put back the head the noise starts again.

Also could anyone tell me what 2 port zone valve has the highest CV value.

Any advise greatly appreciated.
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