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A veteran technician knows that a reliable **dual pressure control** is the backbone of compressor protection
though adapters may be used for round-to-square transitions
This ASME Section IV certified valve features a rugged bronze body construction and a 1-inch FNPT inlet by 1-inch FNPT outlet configuration
making it suitable for most supply or return air locations in standard HVAC applications
McDonnell & Miller 51-S-2-HD Cut Off Els PW 17895 A veteran technician knows thatThe McDonnell & Miller 51 S 2 HD (Part Number 136200) serves as a heavy duty head mechanism only for professional grade water level control. Engineered for high capacity low pressure steam and hot water boiler systems, this unit integrates a mechanical water feeder with a low water cut off (LWCO) function via a built in Snap Acting SPDT switch (No. 2 Switch). It is designed to handle a maximum vessel pressure of 35 PSI and an inlet water supply up to
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