Watson McDaniel Company Datasheets for Pressure Relief Valves

Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.
Pressure Relief Valves: Learn more

Product Name	Notes
Back Pressure Relief Valve -- 1 1/2" 3040 Series 20-70 Back Pressure Relief Valve -- 1 1/2" 3040 Series 40-125 Back Pressure Relief Valve -- 1 1/2" 3040 Series 5-35 Back Pressure Relief Valve -- 1 1/4" 3040 Series 20-70 Back Pressure Relief Valve -- 1 1/4" 3040 Series 40-125 Back Pressure Relief Valve -- 1 1/4" 3040 Series 5-35 Back Pressure Relief Valve -- 1" 3040 Series 1-12 Back Pressure Relief Valve -- 1" 3040 Series 20-70 Back Pressure Relief Valve -- 1" 3040 Series 40-125 Back Pressure Relief Valve -- 1" 3040 Series 5-35 Back Pressure Relief Valve -- 1/2" 3040 Series 1-12 Back Pressure Relief Valve -- 1/2" 3040 Series 20-70 Back Pressure Relief Valve -- 1/2" 3040 Series 40-125 Back Pressure Relief Valve -- 1/2" 3040 Series 5-35 Back Pressure Relief Valve -- 2" 3040 Series 20-70 Back Pressure Relief Valve -- 2" 3040 Series 40-125 Back Pressure Relief Valve -- 2" 3040 Series 5-35 Back Pressure Relief Valve -- 3/4" 3040 Series 1-12 Back Pressure Relief Valve -- 3/4" 3040 Series 20-70 Back Pressure Relief Valve -- 3/4" 3040 Series 40-125 Back Pressure Relief Valve -- 3/4" 3040 Series 5-35	The 3040 Series Back Pressure Valves relieve upstream pressure in a variety of processes. Automatically maintains desired maximum pressure in a vessel or system by relieving excess pressure into lower...
Back Pressure Relief Valve -- 1 1/2" R Series 1-6 Back Pressure Relief Valve -- 1 1/2" R Series 25-100 Back Pressure Relief Valve -- 1 1/2" R Series 5-35 Back Pressure Relief Valve -- 1 1/2" R Series 75-300 Back Pressure Relief Valve -- 1 1/4" R Series 1-6 Back Pressure Relief Valve -- 1 1/4" R Series 25-100 Back Pressure Relief Valve -- 1 1/4" R Series 5-35 Back Pressure Relief Valve -- 1 1/4" R Series 75-300 Back Pressure Relief Valve -- 1" 10691 Series 1-6 Back Pressure Relief Valve -- 1" 10691 Series 25-100 Back Pressure Relief Valve -- 1" 10691 Series 5-35 Back Pressure Relief Valve -- 1" 10691 Series 75-300 Back Pressure Relief Valve -- 1" R Series 1-6 Back Pressure Relief Valve -- 1" R Series 25-100 Back Pressure Relief Valve -- 1" R Series 5-35 Back Pressure Relief Valve -- 1" R Series 75-300 Back Pressure Relief Valve -- 1/2" 10691 Series 1-6 Back Pressure Relief Valve -- 1/2" 10691 Series 25-100 Back Pressure Relief Valve -- 1/2" 10691 Series 5-35 Back Pressure Relief Valve -- 1/2" 10691 Series 75-300 Back Pressure Relief Valve -- 1/2" R Series 1-6 Back Pressure Relief Valve -- 1/2" R Series 25-100 Back Pressure Relief Valve -- 1/2" R Series 5-35 Back Pressure Relief Valve -- 1/2" R Series 75-300 Back Pressure Relief Valve -- 2" R Series 25-100 Back Pressure Relief Valve -- 2" R Series 5-35 Back Pressure Relief Valve -- 2" R Series 75-300 Back Pressure Relief Valve -- 3" R Series 25-100 Back Pressure Relief Valve -- 3" R Series 5-35 Back Pressure Relief Valve -- 3" R Series 75-300 Back Pressure Relief Valve -- 3/4" 10691 Series 1-6 Back Pressure Relief Valve -- 3/4" 10691 Series 25-100 Back Pressure Relief Valve -- 3/4" 10691 Series 5-35 Back Pressure Relief Valve -- 3/4" 10691 Series 75-300 Back Pressure Relief Valve -- 3/4" R Series 1-6 Back Pressure Relief Valve -- 3/4" R Series 25-100 Back Pressure Relief Valve -- 3/4" R Series 5-35 Back Pressure Relief Valve -- 3/4" R Series 75-300	The R Series & 10691 Series Back Pressure Relief Valves are used in the following applications: Water pump bypass for Irrigation, sprinkler systems on golf courses, fountains, and fire protection...
Safety Relief Valve -- WSVB-12M-13S-D Safety Relief Valve -- WSVB-13M-13S-D Safety Relief Valve -- WSVB-13M-14S-E Safety Relief Valve -- WSVB-14M-14S-E Safety Relief Valve -- WSVB-14M-15S-F Safety Relief Valve -- WSVB-15M-15S-F Safety Relief Valve -- WSVB-15M-16S-G Safety Relief Valve -- WSVB-16M-16S-G Safety Relief Valve -- WSVB-16M-17S-H Safety Relief Valve -- WSVB-16S-18S-J Safety Relief Valve -- WSVB-17M-17S-H Safety Relief Valve -- WSVB-17M-18S-J Safety Relief Valve -- WSVB-18M-18S-J	The WSVB Safety Relief Valves are used for over-pressure protec- tion on unfired pressure vessels in saturated steam systems. As safety valves open on a non-compressible fluid applica- tion, the...
Safety Relief Valve -- WSVI-16F-18S-J Safety Relief Valve -- WSVI-17F-19S-K Safety Relief Valve -- WSVI-17S-19S-K Safety Relief Valve -- WSVI-18F-19S-K Safety Relief Valve -- WSVI-18F-20S-L Safety Relief Valve -- WSVI-18S-20S-L Safety Relief Valve -- WSVI-19F-19S-K Safety Relief Valve -- WSVI-19F-20S-L Safety Relief Valve -- WSVI-19F-20S-M Safety Relief Valve -- WSVI-19S-20S-M Safety Relief Valve -- WSVI-20F-20S-L Safety Relief Valve -- WSVI-20F-20S-M Safety Relief Valve -- WSVI-20F-22F-N Safety Relief Valve -- WSVI-20F-22F-P Safety Relief Valve -- WSVI-22F-23F-Q Safety Relief Valve -- WSVI-22F-23F-R	The WSVI Safety Valves are used for over-pressure protection on unfired pressure vessels in saturated steam systems. As safety valves open on a non-compressible fluid application, the disc lifts directly...

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