Omega PSW-180 Leaflet

switch  using  the  actual  working  pressures
encountered in the application.

INSTRUCTION

S H E E T

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
Figure 1).

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.

WIRING

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.

Tools Needed

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

GENERAL

PSW-180  Teflon

®

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

®

wetted  ports

insure  corrosion  resistance  in  highly  corrosive
applications  and  is  well  suited  for  high  purity
applications.

Tools Needed

Applicable Screwdriver 

Flaretek

®

tubing cutter 213-14 or equal

Flaretek

®

flaring tool 213-58 or equal 

Flaretek

®

tools may be ordered from

Flouroware, Inc., Phone (612) 448 - 3131

MOUNTING

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.

Surface Mounting
Insert two #6 screws through mounting ear holes
on  2” centers  (recommended  mounting  for
maximum vibration resistance). Follow directions
for making pressure connection.

Pipe Mounting
Mount unit from its port(s). Follow directions for
making pressure connection.

Part I - Installation

Part II - Adjustments

Dimensions

Figure 1

All dimensions are stated in 
inches unless noted.

Teflon

®

is a registered trademark of E.I. Dupont Company

Flaretek

® 

is a registered trademark of Fluoroware, Inc.