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The McDonnell & Miller 93-M is a commercial-grade combination low water cut-off and pump controller designed specifically for steam boiler applications
The heavy-duty wiring terminals are engineered for a positive electrical connection
ensure you are landing on the correct resistive input terminals to avoid induced voltage issues
ensuring reliability in both freezing and high-heat conditions
Siemens Building Technology 656-0017 Valve 318423-701 The McDonnell & Miller 93-MThe Siemens Building Technology 656 0017 is a heavy duty 1 2 inch pneumatic radiator valve engineered for proportional control in two pipe steam or hot water systems. This normally open (N. O.) assembly features an angle union valve body constructed from durable brass, designed specifically for terminal unit applications like convectors, fan coil units, and baseboard radiation. With a 2. 1 Cv capacity and a standard 3 8 psi spring range, this valve
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