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 proofed solution for sodium hypochlorite applications. This valve provides a long term, maintenance-free solution, with easy installation and the ability to handle lower quality sodium hypochlorite applications where there may be solids in the service. Our Chemflare™ end connection allows for a reliable, leak-free, corrosion resistant union to a PFA delivery system while still using PVC valves. Removing all possible solvent cemented joints is the only way to guarantee a leak-free sodium hypochlorite system. Our SB11 HypoValve with Chemflare™ end connections and compression fittings have no threaded seal surfaces and can easily withstand pulsing flows.