Owner manual

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

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.