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Pressure Loss Alarm Switch Model EPSK
Accessory for ALL Universal Mount
Purging & Pressurization Systems Configurations CD,

B24, B120 & B240
Description
Explosion Proof
Model EPSK Explosion Proof Enclosure Pressure Enclosure Pressure Switch Kits
Switch Kits are accessories that provide a pressure
loss alarm contact. They are intended to mount
in a vertical stand-alone position to complement Technical Bulletin EPSK TB-R0 © 07.10.2018
all universal mount Type Y and Z purging and
pressurization systems, and are offered in a full
range of area classification ratings to satisfy any
Hazardous Location.

Applications
When utilized in conjunction with one or more of our
Model RAB Remote Alarm Beacon or Model RAH
Remote Alarm Horn devices, or any pre-existing or
common alarm device or system, these Enclosure
Pressure Switch Kits can be utilized to activate the
alarm devices or system to gain the attention of
operators and maintenance personnel upon the
loss of safe pressure in a protected enclosure.

Provisions

Model EPSK Enclosure Pressure Switch Kits
include a rated pressure switch to meet your
particular area classification, and a combination
of one or two atmospheric reference vents, a
male 1/4” tubing connector a flush or female pipe
bulkhead connector and a set of 1/4” fasteners to
attach the switch securely, whether mounted inside
or exterior to a protected enclosure.
Certifications Vary
Installation please contact us for
more information
Model EPSK Enclosure Pressure Switch Kit must
be installed in a vertical position on a secure
surface. The high port of the switch must reference
the protected enclosure atmosphere or the last
enclosure of an array, while the low port must
reference external atmosphere. All Switches
feature a 1/2” FPT female pipe thread port for the
connection of suitable conduit to an alarm device.

Calibration & Operation
Calibration of the .07” to .15” W.C. set point is
accomplished by adjusting a set screw on the side
of the Switches, and there is an inherent delay to
switch action created by the restriction of air flow Exterior Switch Interior Switch
through the Switch’s flame arresting pressure ports.
Location Hardware Location Hardware
The CD Configuration Switch features a Form C
contact that is activated mechanically by the switch Both hardware kits include all essential fittings
diaphragm. Switch Configurations B24, B120 & and fasteners to complete switch installation,
B240 each require a power source to energize their
Form C contacts. - see image on Page 2 less electrical conduit fittings

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