Plastic Back Pressure Valves, Plastic Pressure Relief Valves SB10/SB11 from Chemline


The Chemline SB Series Back Pressure Valves, Pressure Relief Valves have two functions. As a Back Pressure Valves, installed in-line downstream of a pump, the back pressure below the metering pump is maintained. When installed in the branch of a tee it is a Pressure Relief Valve. The valve stays closed until inlet pressure reaches the set pressure which is adjusted by turning the spring tensioning bolt. Inlet pressure acts on the Teflon® control diaphragm opening the valve, allowing excess pressure to flow downwards through the orifice.

The SB10/11 Series Back Pressure Valves, Pressure Relief Valves are very sensitive to pressure changes and requires low overpressure to fully open.

Sensitive and Reliable
Designed for Long Life
True Union Ends

PVC, PP, PVDF

Series: SB10 and SB11
Sizes: 3/8" – 2"
Ends: True Union Socket or Threaded
Non Union Socket, Threaded,
Flanged or Butt (Spigot)†, ChemFlareTM
Control Diaphragm: Teflon® Bonded EPDM
Seals: EPDM, Viton®

† PP and PVDF spigot ends have DIN dimensions and will butt fuse directly to Chemline PP and PVDF piping systems.

SB10/11 Series Data Page
3/8" to 1-1/2" SB Series Installation and Maintenance Manual
2" SB Series Installation and Maintenance Manual


Plastic Back Pressure Valves, Plastic Pressure Relief Valves, series SB10, Series SB11, Chemline

Plastic Back Pressure Valves, Plastic Pressure Relief Valves, series SB10, Series SB11, Chemline









Plastic Back Pressure Valves, Plastic Pressure Relief Valves, series SB10, Series SB11, Chemline
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& Regulating Valves

Plastic Back Pressure Valves, Plastic Pressure Relief Valves, series SB10, Series SB11, Chemline
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Plastic Back Pressure Valves, Plastic Pressure Relief Valves, series SB10, Series SB11, Chemline
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