When installed in-line downstream of a pump, Chemline’s SB12 Series Back Pressure/Relief Valves functions as a back pressure valve; when installed in the branch of a tee, it acts as a pressure relief valve. The valve features low hysteresis and low pressure to fully open and is designed to hold back pressure long term. The SB12 Series has a built-in check valve function that prevents reverse flow and does not open with every pulsation from a metering pump, making it ideal for dosing applications. The SB12 Series comes in 3/8” and 4” sizes, is made of PVC, PP, and PVDF, includes EFDM or FKM seals, and a True Union Socket, Threaded or ChemFlare ends.


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