SOR Vane Operated Flow Switch - Manual (Page 2)

2/4 Form 588 (04.13) ©SOR Inc.
Dimensions are
for reference only.
Contact the factory
for certified drawings
for a particular
model number.
The safety retaining ring prevents accidental removal of the switch
adjustment screw. Do not use force to unscrew the adjustment screw
since the sudden release of the adjustment screw under pressure could
cause injury to the person adjusting the switch.
2” NPT
Conn.
1/4”
1/2”
3/4”
3/16” Min.
Clearance
C
Threaded connection shown
Deform
screw threads
from backside
Small vane
Large vane
Tighten firmly
Flow
Hex Plug
Safety
Retaining Ring
Washer
Switch
Adjustment
Screw
Enclosing
Tube
Safety Integrity Level (SIL) Installation Requirements
The SOR pressure switches have been evaluated as Type-A safety related hardware.
To meet the necessary installation requirements for the SIL system, the following
information must be utilized:
„ Proof Test Interval shall be one year.
„ Units may only be installed for use in Low Demand Mode.
„ Products have a HFT (Hardware Fault Tolerance) of 0, and were evaluated in a
1oo1 (one out of one) configuration. Form 1538 (03.12) ©2012 SOR Inc.