switch using the actual working pressures
encountered in the application.
PSW-180 TEFLON SERIES
Differential Pressure Switches
Making Pressure Connection
Use proper tools and prepare tubing per
manufacturers recommendations. Cut tubing. Slip
nut over tubing. Flare tubing. Press tubing onto
pressure connection, making certain tubing is
seated on pressure connection shoulder. Tighten
nut, hand tight, onto pressure connection (see
Minimum torque requirement for 1⁄4” nut is 5
inch • pounds (0.57 Newton • Meters). Be sure
to connect high pressure source to port labeled
“HIGH.” Connect low pressure source to “LOW.”
NEVER TIGHTEN BY TURNING THE
CONTROL INTO THE FITTING.
DO NOT USE A WRENCH. FITTING MUST
BE HAND TIGHTENED ONLY, OVER
TIGHTENING MAY DAMAGE THE PORT.
ALL LIVE SUPPLY CIRCUITS MUST BE
DISCONNECTED BEFORE WIRING THE
CONTROL. CONNECT THE CONDUIT TO THE
HOLE IN ACCORDANCE WITH NATIONAL AND
LOCAL CODES. MAXIMUM RECOMMENDED
WIRE SIZE IS 16 AWG.
Unscrew terminal just enough to put stripped
wire under terminal block clamp. Nominal torque
value for terminal block screws is 9.0 in-lbs.
Conduit hub is to be connected to conduit before
conduit is connected to enclosure.
Flat blade screwdriver
Use screwdriver to turn external adjusting screw
on the side. Turn “in” (clockwise) to increase
pressure setting. For best setting accuracy, set the
differential pressure switch
utilizes a diaphragm sensor to monitor pressure
changes. The switch utilizes dual diaphragm
sensors to monitor the difference in pressure
between two sources. PFA Teflon
insure corrosion resistance in highly corrosive
applications and is well suited for high purity
tubing cutter 213-14 or equal
flaring tool 213-58 or equal
tools may be ordered from
Flouroware, Inc., Phone (612) 448 - 3131
LOCATE SWITCH WHERE VIBRATION,
SHOCK, AND AMBIENT TEMPERATURE
FLUCTUATIONS ARE MINIMAL.
The control can be mounted in any position.
Locate where ambient temperature is above 30°F
and below 160°F.
Insert two #6 screws through mounting ear holes
on 2” centers (recommended mounting for
maximum vibration resistance). Follow directions
for making pressure connection.
Mount unit from its port(s). Follow directions for
making pressure connection.
Part I - Installation
Part II - Adjustments
All dimensions are stated in
inches unless noted.
is a registered trademark of E.I. Dupont Company
is a registered trademark of Fluoroware, Inc.