Back Pressure/Relief Valves

  • PVC
  • PP
  • PVDF
  • transparent-1px
  • NSF
  • CRN
  • Series: SB
    Inlet Connection: 1/4″ – 4″
    Instrument Connection: True Union Socket, Threaded or ChemFlare, Spigot Bodies with Plain, Socket, Threaded or Flanges
    Diaphragm: PTFE Bonded EPDM
    Seat/Seals: EPDM, FPM

Description

Back Pressure/Relief Valve Selection

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.

✓ Choice of PVC, Polypropylene or PVDF construction
Will handle a wide range of chemical applications and temperatures up to 100C (212 deg. F).
✓ Designed for superior Performance
High flow rates vs. overpressures
Low hysteresis (“backlash”)
No chatter
Long Cycle life

✓ True Union ends up to 2”
Easy Installation and maintenance
Leaky threads eliminated

✓ Sizes up to 4”
Model Sizes True Union? ChemFlare? Set pressure Range Size Price Value Major Features
SB17 1/4″ – 3/8″ Yes 3/8″ 7.5 to 150 psi mini good fits tight spaces
SB10 3/8″ – 2″ Yes 3/8″ – 1″ 3 to 60 psi medium good Excellent for Sodium hypochlorite
SB11 3/8″ – 2″ Yes 3/8″ – 1″ 7 to 150 psi medium good Excellent for Sodium hypochlorite
SB12 3/8″ – 2″ Yes 3/8″ – 1″ 5 to 150 psi medium good built-in check function, unchanging opening pressure
SB12 2-1/2″-3″ no 7.5 to 150 psi large good built-in check function, unchanging opening pressure
SB12 4″ no 7.5 to 90 psi large good built-in check function, unchanging opening pressure
SB18 3/8″ – 2″ Yes 3/8″ – 1″ 7.5 to 150 psi medium best recommended for dosing – not too sensitive

Technical

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For detailed product information including pricing, availability, and additional documentation contact Chemline