|
 The
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 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.
The SB12’s have a built-in check valve function, desirable for
dosing applications. They are not so sensitive as to open with
every pulsation from a metering pump.
True
Union Ends Designed for Long Life
Sensitive
and Reliable
|
PVC, PP, PVDF
|
| Series/Sizes: |
SB10/11
- 3/8" to 2" |
| Ends: |
True
Union Socket or Threaded Non Union Socket, Threaded, Flanged
or Butt (Spigot)† |
| Control
Diaphragm: |
Teflon®
Bonded EPDM |
| Seals: |
Viton
(standard),EPDM or CPE* |
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.
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