Products

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°F. The standard downstream set pressure range is 5 to 125 psi; however, with special springs it can reach 75 psi. The design incorporates a poppet seat at the valve orifice to prevent sticking and double U-cup seals on the internal shaft to prevent inlet pressure from affecting the sensing of the downstream pressure. Also, the one-piece body construction eliminates internal leakage that could cause the set pressure to creep beyond a safe limit. A unique rolling diaphragm seal isolates the spring chamber from the downstream liquid. This unique design, in conjunction with a pressure balanced shaft, assures smooth and stable control. Series PRHM pressure regulators prevent downstream pressure from exceeding the desired set pressure. The regulator will remain closed as long as the 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 opens. It continues to open further as more flow is needed until its maximum opening is reached. When the downstream pressure again reaches the set pressure, the regulator closes. Series PR pressure regulators are available in PVC, Polypropylene, PTFE and PVDF. Seals can be EPDM or FKM. For Series PRHM, inlet and outlet connections are NPT female threads.

Advantages of Plast-O-Matic PRHM Regulators
• Automatically regulate and prevent the downstream pressure from exceeding its set point   • Large surface area of its frictionless rolling diaphragm provides exceptional sensitivity to pressure fluctuations      • Downstream pressures settings adjustable from 5 to 125 psi   • Optional gauge ports to assist with setting and monitoring pressure   • Rugged construction with inlet pressures to 150 psi   • Seal concepts provide non-sticking design   • Control spring is isolated from liquid path

* PR series pressure regulators with a pressure setting range of 5 to 50 psi - request information on PH Series regulators.

Pressure ratings shown above are the maximum allowable inlet pressure for the solenoid followed by the maximum allowable back pressure @ 73°F. PS series solenoid valves require a minimum of 5 PSI line pressure to operate and require a minimum of 5 PSI differential between upstream and downstream pressures.

Series RVDM In-Line Pressure Relief Valves feature a primary rolling diaphragm and secondary flat diaphragm which incorporates the Plast-O-Matic patented Fail-Dry® design for added protection. If the rolling diaphragm should fail, liquid will weep through the vent port which is located between the two diaphragms. Leakage indicates maintenance is required and can be conveniently scheduled, eliminating an emergency shutdown.  Series RVDM valves are supplied with adjustment screws so that the user can make his own setting according to pressure requirements. Pressure settings can also be made at the factory to customer’s requirements. RVDM valves can be set from 5 to 100 psi (5 to 120 psi for 1/2" size) by simply turning the adjusting bolt.

Series RVDM In-Line Pressure Relief Valves feature a primary rolling diaphragm and secondary flat diaphragm which incorporates the Plast-O-Matic patented Fail-Dry® design for added protection. If the rolling diaphragm should fail, liquid will weep through the vent port which is located between the two diaphragms. Leakage indicates maintenance is required and can be conveniently scheduled, eliminating an emergency shutdown.  Series RVDM valves are supplied with adjustment screws so that the user can make his own setting according to pressure requirements. Pressure settings can also be made at the factory to customer’s requirements. RVDM valves can be set from 5 to 100 psi (5 to 120 psi for 1/2" size) by simply turning the adjusting bolt.

Series RVDM In-Line Pressure Relief Valves feature a primary rolling diaphragm and secondary flat diaphragm which incorporates the Plast-O-Matic patented Fail-Dry® design for added protection. If the rolling diaphragm should fail, liquid will weep through the vent port which is located between the two diaphragms. Leakage indicates maintenance is required and can be conveniently scheduled, eliminating an emergency shutdown.  Series RVDM valves are supplied with adjustment screws so that the user can make his own setting according to pressure requirements. Pressure settings can also be made at the factory to customer’s requirements. RVDM valves can be set from 5 to 100 psi (5 to 120 psi for 1/2" size) by simply turning the adjusting bolt.