Back Pressure Valves / Pressure Relief Valve

SB Series 10 & 11
The Chemline SB Series Back Pressure/Relief Valve has two functions. As a 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 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 is very sensitive to pressure changes and requires low overpressure to fully open.

True Union Ends Designed for Long Life
Sensitive and Reliable

With Optional Gauge

Features:
• Low overpressure to fully open
• Sensitive to pressure changes
• For clean fluids only – For dirty fliuds use SB12 Series

Set Pressure Ranges:
• SB10 – 3 to 60 psi l
• SB11 – 7 to 150 psi
• The only difference between SB10 and SB11 is the strength of spring

Long Cycling Life
• Dynamic seal is Teflon® bonded EPDM for high chemical resistance l
• This moulded diaphragm is designed for superior sealing and flex life

Designed for Superior Performance
• Valves are hydraulically designed for minimum hysteresis (“backlash”) and to eliminate chatter

† PP and PVDF spigot ends have DIN dimensions and will butt fuse directly to Chemline PP and PVDF piping systems.
* CPE= Chlorinated Polyethylene.