Plast-O-Matic PRHM Series Polypropylene Pressure Regulator, For Corrosive and Ultra-Pure Liquids, 5 – 125 psi Regulating…

Series PRHM is a molded version of Series PRH. Design incorporates a poppet seat, double u-cups, large area rolling diaphragm and one piece body construction. A pressure balanced shaft assures smooth and stable control, while the valve design provides excellent flow performance. Molded pressure regulator to control system downstream pressure. Optional ports for gauge taps, sensing area flush. These molded pressure regulators are available in Natural Polypropylene with seals of FKM. Inlet and outlet threads are 1/2″ NPT female. Diaphragm isolates spring from media. No external metal fasteners – ideal for corrosive environments. Mounting holes to facilitate side or bottom mounting. Plast-O-Matic Series PRHM Pressure Regulators are designed to handle corrosive and ultra-pure liquids with inlet pressures up to 150 PSI at 75 degree F. Standard downstream set pressure range is 5 to 125 PSI. The normally-open regulators incorporate a poppet seat at the valve orifice to prevent sticking and affecting the sensing of the downstream line pressure. Also, one piece body construction eliminates internal leakage that could cause the set pressure to creep beyond a safe limit. A unique, large-surface rolling diaphragm seal isolates the spring chamber from downstream pressure sensing liquid. This unique design in conjunction with a pressure balanced, reinforced shaft assures smooth performance and stable control. Tapped holes (1/4 – 20) are provided on the bottom, and through holes on the sides to provide easy mounting. Hubs for optional use as a gauge port, or as a sensing area flush, are molded on the body. Series PRHM pressure regulators prevent downstream pressure from exceeding the desired set pressure. Regulator will remain closed as long as set pressure is maintained. As equipment or valves downstream of the regulator begin to open and demand flow, the downstream pressure begins to fall and the regulator begins to open. As valves or equipment downstream open further the pressure regulator continues to open, until its maximum opening is reached. As the process is reversed, downstream pressure begins to increase and the regulator starts closing. When the downstream pressure again reaches set pressure the regulator closes bubble-tight.

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Converts varying inlet pressure up to 150 PSI, to a stabilized, lower pre-set downstream pressure
Protects sensitive downstream instruments, tubing and filters against damage from overpressure/pressure surges; permits the entire system to operate safely and effectively
Large surface area of its frictionless rolling diaphragm provides exceptional sensitivity
Free movement of the diaphragm on a balanced shaft assures smooth, accurate performance and reliable sealing for millions of cycles
Double U-cups prevent leakage along the shaft and eliminates the possibility of “creep”