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PUMC Home : Product Divisions : Preferred Utilities : Product

Pressure Reducing Valves

Features | Overview | Specification

The Model B Pressure Regulating Valve is a self-operated spring-loaded pressure regulating valve.  This valve is installed to sense downstream pressure to maintain a constant supply pressure to the fuel metering valves.  


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  • Features
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  • Self Operated Spring Loaded Pressure Regulating Valve
  • Cast Iron Body
  • Viton Diaphragm Rated For 300° F Maximum Temperature
  • Will not let pressure bleed through when the system is idle. 
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  • Overview
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The Model B Pressure Regulating Valve is a self-operated spring-loaded pressure regulating valve typically installed in the supply line to boiler fuel metering valves.

The Model B is a ½" or 1" NPT, 250 lb. cast iron body, stainless steel trim and disk.  The valve has a Viton diaphragm rated for 300° F maximum temperature.  

The Model B is designed for pressure reduction and closes tight for dead end service.  In times when the boiler is not operating, pressure will not bleed through.  Installation of a shutoff valve prior to this valve, would still be good design practice.  

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  • Specification
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Provide and install a Pressure Regulating Valve as shown on the contract drawings.  The valve shall be a 1" (½") NPT Preferred Utilities Manufacturing Corporation, Danbury, CT, Model B.  The valve shall be diaphragm operated with 250 lb cast iron body, hardened stainless steel trim with an adjustable spring range from _____ to _____ psig.
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