Back Pressure Valves

Back Pressure Valves - 1/4" and 1/2" PVC & CPVC.
Diaphragm pressure relief valves are designed to protect pumping systems from over pressure damage caused by defective equipment or blockage in the pump system line.

• Reliability and low cost
• Adjustable from 15 to 150 psi
• 2 port (standard) or 3 port (with gauge)
• Viton diaphragm standard (others available)
• Full range of chemically resistant wetted materials
• Sizes from 1⁄4” to 1” depending on model

Diaphragm pressure relief valves operate when the pressure in the pumping system exceeds the preset pressure of the valve. The diaphragm is held against the valve seat by an internal spring. When the preset pressure is exceeded the diaphragm is forced up and the system fluid flows out the relief port, back to the system fluid tank or to the suction side of the pump. The valves are pre-set at 40 psi; however they are field adjustable from 10 to 150 psi, (optional 350 psi) via the adjustment screw. The relief valve should be set approximately 15 psi higher than the system pressure. Installation should be made as close to the pump as possible, without any valves or accessories between the relief valve and the pump.

A pressure test on every back pressure relief valve prior to shipping.

This ensures the unit will operate leak-free and to the specified pressure ratings.

These pressure valves come standard without a gauge port or gauge. When ordering please specify if a gauge port and/or gauge is required from the part numbers below.

Part Numbers:

• Model EBPV-025-PVC - 1/4” NPT, PVC Back Pressure Valve with Viton Diaphrag. 140 F Maximum Temperature.
• Model EBPV-050-PVC - 1/2” NPT, PVC Back Pressure Valve with Viton Diaphrag. 140 F Maximum Temperature.
• Model EBPV-025-CPVC - 1/4” NPT, CPVC Back Pressure Valve with Viton Diaphragm. 140 F Maximum Temperature.
• ModelEBPV-050-CPVC - 1/2” NPT, CPVC Back Pressure Valve with Viton Diaphrag. 140 F Maximum Temperature

Optional model EBPV-MK Back Pressure Valve Mounting Kit with Hardware may be added to your order.

Please email us for custom made to order valve quotes for the following materials:

• Polypropylene glycol - (140F Max Temp)
• 316 SSTL - (300F Max Temp)
• PTFE (Teflon) - (140F Max Temp)
• PVDF (Kynar) - (140F Max Temp)
• Alloy 20 - (300F Max Temp)
• Hastalloy C276 material designs - (300F Max Temp)

Ports up to 1" may be ordered as well. Made in the USA.