SOR Dual Hi-Lo Weatherproof Pressure Switch User Manual
Dual Hi-Lo
Instructions
Pressure Switches
General Instructions
The pressure sensing elements are a pair of force-balanced,
piston-actuated assemblies sealed by flexible diaphragms and o-rings
that are static. The only wetted parts in this arrangement are the single
pressure port, two sensing assembly diaphragms and o-rings.
Media pressure on the area of the pistons counteracts the force of
the range spring (adjustable by the adjusting nuts),
which moves the piston shafts only a few
V1 Weathertight
Housing
thousandths of an inch to directly actuate
the electrical snap-action switching elements.
NOTE: If you suspect that a product is defective,
®
contact the factory or the SOR
your area for a return authorization number (RMA).
This product should only be installed by trained
and competent personnel.
Representative in
V2 Weathertight
Explosion Proof
Hermetically
Sealed
Installation
Dual Hi-Lo Pressure Switches may be secured to bulkheads, panels or pipe stanchions with
suitable bolts. When mounting the pressure switch to an irregular or uneven flat surface,
install rubber washers on the mounting bolts between the housing and the mounting surface.
Failure to place washers between the housing and the mounting surface may
result in torsional forces on the housing that could cause false trips or render
the pressure switch inoperative.
Failure to mount the housing on a at mounting surface may result in
torsional forces on the housing that could cause false trips or render the
pressure switch inoperative.
Line mounting by either the process connection or the electrical conduit connection is not
recommended.
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.
Design and specifications are subject to change without notice.
For latest revision, go to www.sorinc.com
Form 1538 (03.12) ©2012 SOR Inc.
Form 248 (04.13) ©SOR Inc.
Registered Quality System to ISO 9001
1/4
Process Connection
Securely connect the process line to the pressure port using two wrenches; one to hold the
hexagonal flats on the pressure port, the other to tighten the process pipe or tube fitting.
Ensure that the process connection is tightened and positioned so that
bending and torsional forces imposed on the pressure switch are minimal. DO NOT loosen the pressure port from the body, because leakage
could result or the pressure switch could be rendered inoperative.
Dimensions
V1 WEATHERTIGHT
139.9
5.51
70.0
2.75
ELECTRICAL
CONNECTION
3/4 NPTF STD
1/2 NPTF OPT
M20 X 1.5 F OPT
27.0
1.06
*186.2
7.33
*68.6
2.70
A
Linear = mm/inches
Drawing 0090236
114.3
4.50
57.2
2.25
2X
7.1
0.28
MOUNTING
HOLES
PROCESS
CONNECTION
1/4 OR 1/2 NPTM
PROCESS CONNECTION
OPTIONAL
70.0
2.76
27.8
1.09
9.5
0.38
2/4
Form 248 (04.13) ©SOR Inc.
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