Relief valves are to prevent overpressures in vessels and lines to handle by-pass flow from pumps. For highly corrosive or pure liquids. “RVT” relief valves feature a non-sticking design utilizing a PTFE shaft passing through (3) U-cup seals. Venting between the upper and center U-cup seals results in our FAIL-DRY design for added protection.
SERIES RVD is an angle pattern design featuring a single diaphragm which is an advantage where salt crystallization problems can cause valve sticking. The standard RVD is available in 1/4" and 1/2" pipe sizes. Set pressures from 5 to 150 PSI. (1/3 to 10 Bars).
The spring housing, since it is not in contact with liquid, is supplied only in PVC. To assure steadier flow, better pump performance, and to protect pumps from dead heading, use Plast-O-Matic’s Pressure Relief Valve

 (Optional Selections Are Made In The Shopping Cart)

  • Optional pressure seal $15.36. Available on RVT only.
  • Stainless steel fasteners are standard.
  • RVD fasteners are stainless steel (standard).
  • For Polypropylene, PVDF, & PTFE pricing, consult sales office.
Unit of Measure

Pipe Size

N/A 1/4 inches

End Connections


Body Material


Seal Material


Options Available

N/A "W" - Optional Stationary Pressure Seal For RVT ($22.00)

NOTICE: Plus shipping & handling charges to apply

N/A "International orders and orders slated for export require special handling and additional documentation. We will contact you with the necessary details to facilitate a timely delivery and proper payment method."