Omega Products PSW28V-30W User Manual



PSW27, PSW28, PSW29 Series

Pressure & vacuum switches
Compact, rugged, pre-fixed setpoint

INSTRUCTION

SHEET

Shop online at: omega.com e-mail: [e-mail]
For latest product manuals: omegamanual.info

Installation instructions for OMEGA PSW27, PSW28 & PSW29 Series: Pressure and

vacuum switches, compact, rugged, pre-fixed setpoint.

General

These reliable, compact single pole switches are used in pressure and vacuum applications where
moderate accuracy is sufficient. The fixed setpoint is factory set.

M4070-0504

Additional Information

Temperature Range: -10 to 75°C (14 to 167°F)

Setpoint Accuracy: +/- 10% at 70°F. Note: pressure settings may change over the temperature range.

Pressure Connection:

PSW27: 1/8" NPT male.
PSW28: Center spout for 1/8" ID tubing. Provided with 9/16-18

mounting nut.

PSW29: Radial spout for 1/8" ID tubing.

Approvals: UL recognized, CSA certified, microswitches bear the ENEC & CE Mark.

PSW27 Series

)

)

)

)

)

)

)

)

Mounting Instructions

PSW27 series come with a 1/8 NPT male pressure connection with a 9/16 threaded mounting, and nut is
included.

Electrical/Pneumatic Specification for PSW27 Series Pressure Switches

Model No. Fixed Setpoint Proof Pressure SPDT Switch Rating

PSW27-1P 1 psig 30 psig 10 amps (resistive)

PSW27-2P 2 psig 50 psig 21 amps (resistive)

PSW27-5P 5 psig 50 psig 21 amps (resistive)

PSW27-10P 10 psig 50 psig 21 amps (resistive)

PSW27-20P 20 psig 50 psig 21 amps (resistive)

PSW27-30P 30 psig 80 psig 21 amps (resistive)

PSW27-40P 40 psig 80 psig 21 amps (resistive)

PSW27-50P 50 psig 80 psig 21 amps (resistive)

Electrical/Pneumatic Specifications for PSW27V Vacuum Switches

Model No. Fixed Setpoint Proof Pressure

PSW27V-25W 25" WC Vac 300" WC Vac 10 amps (resistive

PSW27V-30W 30" WC Vac 300" WC Vac 10 amps (resistive

PSW27V-40W 40" WC Vac 300" WC Vac 21 amps (resistive

PSW27V-50W 50" WC Vac 300" WC Vac 21 amps (resistive

SPDT Switch Rating

PSW27V-75W 75" WC Vac 350" WC Vac 21 amps (resistive

PSW27V-100W 100" WC Vac 350" WC Vac 21 amps (resistive

PSW27V-150W 150" WC Vac 350" WC Vac 21 amps (resistive

PSW27V-200W 200" WC Vac 350" WC Vac 21 amps (resistive

PSW28 Series

Mounting Instructions

PSW28 Series come with a center spout for 1/8” ID tubing, with a 9/16 mounting thread and tube lock nut
included.

Electrical/Pneumatic Specifications for PSW28 Pressure Series

Model No. Fixed Setpoint Proof Pressure SPDT Switch Rating

PSW28-1P 1 psig 30 psig 10 amps (resistive)

PSW28-2P 2 psig 50 psig 21 amps (resistive)

PSW28-5P 5 psig 50 psig 21 amps (resistive)

PSW28-10P 10 psig 50 psig 25 amps (resistive)

PSW28-20P 20 psig 50 psig 25 amps (resistive)

PSW28-30P 30 psig 80 psig 25 amps (resistive)

PSW28-40P 40 psig 80 psig 25 amps (resistive)

PSW28-50P 50 psig 80 psig 25 amps (resistive)

Electrical/Pneumatic Specifications for PSW28V Vacuum Series

Model No. Fixed Setpoint Proof Pressure SPDT Switch Rating

PSW28V-25W 25" WC Vac 300" WC Vac 10 amps (resistive)

PSW28V-30W 30" WC Vac 300" WC Vac 10 amps (resistive)

PSW28V-40W 40" WC Vac 300" WC Vac 21 amps (resistive)

PSW28V-50W 50" WC Vac 300" WC Vac 21 amps (resistive)

PSW28V-75W 75" WC Vac 350" WC Vac 21 amps (resistive)

PSW28V-100W 100" WC Vac 350" WC Vac 21 amps (resistive)

PSW29 Series

Mounting Instructions

Radial spout for 1/8" ID tubing. Through hole legs for mounting bolt.

Electrical/Pneumatic Specifications for PSW29 Pressure series

Model No. Fixed Setpoint Proof Pressure SPDT Switch Rating

PSW29-1P 1 psig 30 psig 10 amps (resistive)

PSW29-2P 2 psig 50 psig 21 amps (resistive)

PSW29-5P 5 psig 50 psig 21 amps (resistive)

PSW29-10P 10 psig 50 psig 21 amps (resistive)

PSW29-20P 20 psig 50 psig 21 amps (resistive)

PSW29-30P 30 psig 50 psig 21 amps (resistive)

Materials of Construction (All Series)

Body Acetal

Diaphragm

Hysteresis (Dead

Band)

Electrical

Connection

Proof Pressure See table.

Media

Compatibility

EPDM (Ethylene-Propylene Diene Monomer) The EPDM diaphragm should not be

used with petroleum products. Specificy Nitrile for these assplications.

Pressure switches: approximately 25% of the setpoint.
Vacuum switches: approximately 30% of the setpoint.

6.35mm (0.25:) standard “Slide-On” male terminals

Air, water and many other fluids and gases that are compatible with EPDM & Acetal.

Note: Mineral Oil and similar fluids are not compatible with EPDM. Request Nitrile

diaphragm.

Overall

Dimensions

Weight 6 g (0.2 oz)

Listings UL Recognized & CSA Certified

46 x 51 x 26 mm (approximately 1.75" x 2" x 1")

Servicing Europe:

OMEGAnet®Online Service Internet e-mail

Benelux:

www.omega.com [e-mail]

USA:

ISO 9001 Certified

Canada:

Servicing North America:

One Omega Drive, Box 4047
Stamford CT 06907-0047
Te l: [phone] FAX: [phone]
e-mail: [e-mail]

976 Bergar
Laval (Quebec) H7L 5A1, Canada
Te l: [phone] FAX: [phone]
e-mail: [e-mail]

Czech Republic:

France:

Germany/Austria:

For immediate technical or application assistance:

USA and Canada:

Mexico:

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the
European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without
notice. WARNING: These products are not designed for use in, and should not be used for, human applications.

Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA
Customer Service: 1-800-622-2378 / 1-800-622-BEST
Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN
TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

En Espan˜ol: [phone]-7803 e-mail:[e-mail]
FAX: [phone] [e-mail]

®

®

United Kingdom:

®

ISO 9002 Certified

Postbus 8034, 1180 LAAmstelveen, The Netherlands
Te l: [phone] FAX: [phone]
To ll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Frystatska 184, 733 01 Karviná, Czech Republic
Tel: [phone] FAX: [phone]
To ll Free: 0800-1-66342 e-mail: [e-mail]

11, rue Jacques Cartier, 78280 Guyancourt, France
Te l: [phone] FAX: [phone]
To ll Free in France: 0800 466 342
e-mail: [e-mail]

Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Te l: [phone] FAX: [phone]
To ll Free in Germany: 0800 639 7678
e-mail: [e-mail]

One Omega Drive, River Bend Technology Centre
Northbank, Irlam, Manchester
M44 5BD United Kingdom
Tel: [phone] FAX: [phone]
To ll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase.
OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and
shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR)
number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced
at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling,
improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows
evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or
vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components which wear are not
warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any
omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided
by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be as specified and free of defects.
OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not
exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or
special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in
or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear
installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic
WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage
whatsoever arising out of the use of the Product(s) in such a manner.

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO

RETURN REQUESTS / INQUIRIES

OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER
TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any
correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.
PATENT NOTICE: U. S. Pat. No. 6,074,089; 5,465,838 / Canada 2,228,333; 2,116,055 / UK GB 2,321,712 / Holland 1008153 / Israel 123052 / France

2 762 908 / EPO 0614194. Other patents pending.

FOR W

ARRANTY RETURNS, please have the following information

available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was PURCHASED,

2. Model and serial number of the product under warranty, and

3. Repair instructions and/or specific problems relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and
engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2004 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic

medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

FOR NON-WARRANTY REPAIRS,

consult OMEGA for current repair charges.

Have the following information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative to the product.