The Pressure Reducing Valves or other name “Forward Pressure Regulators” or “Pressure Regulators” are normally-open valves which reduce the pressure within the system to a pre-set value. By using the differential pressure, the pressure reducing valve adjusts itself to the set working pressure to prevent overpressure conditions to downstream equipment such as filters, sensitive tools, etc. The outlet pressure (working pressure) is not directly related to the inlet pressure.

If the outlet pressure increases above the desired value the diaphragm is lifted against the spring force to close the valve, therefore reduce the pressure in outlet. When outlet pressure decreases below the set-pointed value, due to spring force valve open and increase the pressure in outlet. The pressure reducing valve begins to close or open until a state of equilibrium is re-established; in other words, the outlet pressure remains constant irrespective of an increasing or decreasing inlet pressure

We offer to customers many kinds of pressure regulator (pressure reducing valve) from Plast-O-Matic Inc., these valves are 100% produced in USA:

Series PRHM High performance 5 to 125 psi set pressure 1/2" PVC/CPVC/PP/PVDF

Series PRHM High performance 5 to 125 psi set pressure 3/4" and 1" PVC/CPVC/PP/PVDF

Series PRH High performance 10 to 125 psi set pressure 1/4" through 3" sizes

Series PRH-U Ultrapure version of Series PRH

Series PRD Differential pressure regulators 1/4" through 3" sizes

Series PRA Air loaded pressure regulator 5 to 125 psi set pressure 1/4" through 3" sizes for the ultimate control and performance

Non-Rising Stem Depending on size/materials, certain valves are shipped with a non-rising adjustment bolt

When should use “Pressure Regulator”:

• Prevent overpressure conditions to downstream equipment such as filters, sensitive tools, etc.

• Convert excessive or wildly fluctuating upstream pressure to a constant predetermined downstream pressure.

• Control pressure differential (Delta P) across downstream system equipment (Refer to Series PRD below).

• Regulate to the correct pressure range so that a flow system or piece of equipment can operate safely and effectively.

Plast-O-Matic pressure reducing valves (pressure regulator) have many outstanding features:

• Offer wide range of pressure settings with smooth, sensitive operation.

• Engineered thermoplastics for corrosive and ultra pure liquids.

• One piece body construction eliminates internal leakage that can cause malfunction.

• Pressure sensing is done with rolling diaphragms. These have the largest surface area among all diaphragm regulator designs, which results in the greatest accuracy. Furthermore, the sensing chamber is isolated from the flow path, so it provides unrestricted flow.

• Each valve is individually tested prior to shipment.

• No wetted metals; all external fasteners are stainless steel, control springs on spring loaded models are not in the liquid.

• Maintenance-free designs.

• Factory pre-set if requested.

• Internal sensing area flush option.