SOR Big Hermet Explosion Proof, Hermetically Sealed, Pressure Switch User Manual

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Form 280 (04.13) ©SOR Inc.

Process Connection

Securely connect process line to pressure port using two wrenches: one to hold hex flats on
pressure port, the other to tighten process pipe or tube fitting.

Failure to mount the housing on a fl at mounting surface may result in
torsional forces on the housing that could cause false trips or render the
pressure switch inoperative. Use care not to loosen port from body or body
from housing.

Inadvertent movement of the over-travel adjustment screw will degrade
performance and could render the device inoperative, unless factory
authorized procedures are followed.

Installation

Ensure that the wiring conforms to all applicable local and national electrical codes and
install unit(s) according to relevant national and local safety codes.

 Secure the housing mounting pad to a bulkhead, panel rack or pipe stanchion with

suitable 1/4” bolts.

 Line mounting by either process connection or electrical conduit connection is
not

recommended.

 Suggested mounting orientation is electrical conduit connection at 12 o’clock and

process pressure port at 6 o’clock. However, the device can be mounted in any position.
Breather drains are located on the housing back wall. Breather drains must be kept clear
of paint and foreign matter.

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.