Back Pressure/Relief Valves

SB Series Back Pressure Relief Valves

Chemline’s SB Series back pressure relief valves are designed for long maintenance-free life. They are designed for superior performance in dosing systems. Different models are available. Each has advantages for different applications.

How they Work

Chemline SB Series Back Pressure/Relief Valves have two functions: as a back pressure valve, installed in-line downstream of a pump, the back pressure below the metering pump is maintained. When installed in the branch of a tee they are pressure relief valves. The valves stays closed until inlet pressure reaches the set pressure which is adjusted by turning the spring tensioning bolt. Inlet pressure acts against a PTFE bonded diaphragm, opening the seat to allow flow until the inlet pressure again equals the set pressure.

SB11 HypoValve for Sodium Hypochlorite

Chemline’s SB11 Back Pressure/Relief HypoValve with PVC body, FPM (Viton) seals and ChemFlare™ end connections is our proven solution for sodium hypochlorite applications. This valve provides a long term, maintenance-free service, and the ability to operate with lower quality chemical where other valves fail.

True Union design means easy installation and ChemFlare™ end connections provide a reliable, leak-free mechanical connection of the PVC valve to a PFA delivery system. Removing all PVC solvent cemented joints is the only way to guarantee a leak-free sodium hypochlorite system.

The SB10/11 Series is very sensitive to pressure changes and requires low over pressure to fully open. It is designed for clean fluids only.

The SB12 Series has a built-in check valve function, desirable for dosing applications. It is not so sensitive as to open with every pulsation from a metering pump. It is designed for clean fluids only.

The SM17 Mini Series offers high performance in a compact package.

The SB18 Series is recommended for dosing applications. It is not so sensitive as to open with every pulsation from a metering pump.