Series PRE • Extended set pressure range:

Excellent performance in a standard, spring-type regulator; available pipe sizes 3/4" and 1". Compact profile, all-plastic set screw. Seal materials are EPDM and Viton.

• Relief setting is infinitely adjustable from 10 psi to 125 psi.
• Maximum inlet pressure is 150 psi.
• Available in PVC, Natural Polypro, Kynar PVDF.
• PTFE sleeve provides smooth, non-stick operation.
• Designed for low maintenance and easy to adjust.
• Economical, heavy-duty design.

Series PR • Premium performance, Lower (5-50 psi) set range:

Superior flow, 1/4" through 3" sizes 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.

• Pressure setting is infinitely adjustable from 5 psi to 50 psi.
• Maximum inlet pressure is 150 psi.
• Available in PVC, Natural polypro, PTFE and Kynar PVDF.
• Sizes 1/4", 1/2", 3/4", 1", 1-1/2", 2" & 3".
• Seals in EPDM or Viton.
• Designed for low maintenance and easy to adjust.
• High performance, heavy-duty design.

Please click here for complete specifications (a web page specific to Series PR)

Series PRM • Premium performance, Medium (5-75 psi) set range, 1/2" size:

Series PRM is a 1/2" molded version of Series PR with a slightly higher set pressure range and no external metal fasteners. 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.

• Pressure setting is infinitely adjustable from 5 psi to 75 psi.
• Maximum inlet pressure is 150 psi.
• Available in 1/2" PVC.
• Seals in EPDM or Viton.
• High performance, heavy-duty design.
• Designed for low maintenance and easy to adjust.

Series PRH • Premium performance, High (30-125 psi) set range:

Series PRH is based on the same heavy duty architecture as Series PR (above) with a higher set pressure range and higher flow performance. 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.

• Pressure setting is infinitely adjustable from 30 psi to 125 psi.
• Maximum inlet pressure is 150 psi.
• Available in PVC, Natural polypro, PTFE and Kynar PVDF;
• Sizes 1/4", 1/2", 3/4", 1", 1-1/2", 2" & 3".
• Seals in EPDM or Viton.
• High performance, heavy-duty design.
• Designed for low maintenance and easy to adjust.

Series PRD • Differential pressure regulator:

Series PRD is a differential pressure regulator based on Series PR (above) with two threaded ports. One port is for a downstream pressure sensing line, the other is fitted with a bleed screw to exhaust air from the housing. Otherwise, design is identical to Series PR. The sensing line feeds the pressure downstream (P3) of the equipment being protected to the top of the spring housing (also P3). This pressure assists the spring in keeping the regulator open against the pressure directly at the regulator outlet (P2). When pressure downstream begins to drop (as it would when a filter becomes more and more clogged), the regulator begins to close and becomes fully closed when the differential setting is reached. This assures against overpressure across the bank of filters or whatever the equipment may be. The differential pressure setting is P2 minus P3.

• Pressure setting is infinitely adjustable from 5 psi to 50 psi.
• Maximum inlet pressure is 150 psi.
• Available in PVC, Natural polypro, PTFE and Kynar PVDF;
• Sizes 1/4", 1/2", 3/4", 1", 1-1/2", 2" & 3".
• Installs easily; common tubing is used to connect to desired point downstream.
• Spring is fluoropolymer coated since downstream liquid is in contact.
• Seals in EPDM or Viton.
• High performance, heavy-duty design.
• Designed for low maintenance and easy to adjust.

Series PRA • Air loaded pressure regulator:

Series PRA uses the standard air from a compressor instead of a spring to generate the force needed to regulate pressure. It is based on the same heavy duty architecture as Series PR (above) with a significantly broader set pressure range and improved performance. 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.

A common self-relieving type compressed air valve is needed to connect your compressed air line to the regulator. The PRA will mimic whatever pressure you apply to the top via the self-relieving valve. If you apply 40 psi to the top of the PRA, you can expect downstream liquid pressure to be 40 psi as well.

• Pressure setting is infinitely adjustable from 5 psi to 125 psi.
• Maximum inlet pressure is 150 psi.
• Available in PVC, Natural polypro, and Kynar PVDF;
• Sizes 1/4", 1/2", 3/4", 1", 1-1/2", 2" & 3".
• Seals in EPDM or Viton.
• High performance, heavy-duty design.
• Outperforms spring loaded regulators through improved response to pressure changes; pressure is maintained without sacrificing flow.
• Performance rivals exotic control valves but at much lower cost.
• Used with the optional Stabilizer -- U.S. Patent No. 6,418,956 -- Series PRS, this air-loaded regulator will perform with virtually zero drop off from set pressure.
• Incorporates the patented Fail Dry safety vent.

Series PRU • Ultra-pure pressure regulator:

Series PRU uses a convoluted PTFE diaphragm to sense pressure and isolate the spring used to regulate pressure. The internal shaft is PTFE. No elastomers, metals, or alternate polymers are in contact with liquid in the PTFE bodied version. Design incorporates one piece body construction and no external fasteners. A pressure balanced shaft assures smooth and stable control, while the valve design provides excellent flow performance.

Spigot Ends:

Plast-O-Matic pressure regulators are available with spigot ends when required for high purity piping systems.
Request Catalog ZSP on catalog request page (link below), or please click here for a web page with complete specifications.
• Kynar PVDF, Natural Polypro & PVC.
• All pipe sizes & models.
• Factory installed by Plast-O-Matic valve technicians.
• High Purity Quality Assurance Procedure/Class 1000 (or better) cleanroom procedure also available.
Request Catalog PR for description.