SOR Explosion Proof Pressure Switch UL/CSA/ATEX - Manual

Form 316 (01.13) ©SOR Inc. 1/8
These instructions provide information for the installation and field calibration of SOR ®
B & J Pressure Switches.
The pressure sensing element of the SOR B & J pressure switch is a force-balanced
piston-actuated assembly sealed by a flexible diaphragm and an o-ring that is static. The
only wetted parts in this arrangement are: the pressure port, the diaphragm and o-ring.
An optional welded pressure port and diaphragm assembly eliminates the o-ring. A wide
selection of wetted parts materials is available for compatibility with the process media.
Media pressure on the piston counteracts the force of the adjustable range spring, which
moves the piston shaft only a few thousandths of an inch to directly actuate the electrical
switching element.
B & J
Pressure Switches
General Instructions
Registered Quality System to ISO 9001
Design and
specifications are
subject to change
without notice.
For latest revision, go to
www.sorinc.com
NOTE: If you suspect that a product is defective, contact the factory or the SOR Representative
in your area for a return authorization number (RMA). This product should only be installed by
trained and competent personnel.
Table of Contents
Installation .......................................1
SIL Installation ..................................2
Process Connection ............................2
Electrical Connection ...........................3
Calibration .......................................4
ATEX Marking Details ..........................4
Operation...................................... 5-7
Declaration of Conformity .....................8
Installation
B & J pressure switches may be secured to bulkheads, panels or pipe stanchions with
suitable bolts.
Line mounting by either the process connection or the electrical conduit connection is
NOT recommended.
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.