Murphy PSB specifications Dimensions, Mounting, Trip Point Chart, Wiring, How to Order

Common (C)

Normally

Open (N.O.)

Dimensions

2-1/4 in.

(57 mm)

NO C NC

Slot head terminal screws (4-40, UNC-2A)

2-9/16 in.
(65 mm)	1/8-27 NPT

2-1/32 in. Dia.

(52 mm)

1/2 in. (13 mm) Square wrench flats

Installation Instructions

Mounting

CAUTION: Use wrench on shank to tighten or loosen pressure connection. DO NOT TWIST CASE, which will damage the unit and void the warranty.

1.Before installing the PSB switch, apply sealant, such as Teflon tape, to the threads (be sure sealant does not block the inlet orifice).

2.The PSB can be mounted in horizontal or vertical angles (do not mount switch facing down).

Trip Point Chart

Ranges available	Factory setting*		Maximum pressure
psi (kPa/MPa) [bar]	psi (kPa) [bar] Falling		psi (kPa) [bar]
0-15 (0-103) [0-1.03]	3 (21) [.21]		30 (207) [2.07]
0-30 (0-207) [0-2.07]	7 (48) [.48]		60 (414) [4.14]
0-50 (0-345) [0-3.45]	10	(69) [.69]	100	(0-689) [0-6.89]
0-75 (0-517) [0-5.17]	15	(103) [1.03]	150	(0-1.03) [0-10.34]
0-100 (0-689) [0-6.89]	20	(138) [1.38]	200	(0-1.38) [0-13.79]
0-150 (0-1.03) [0-10.34]	30	(207) [2.07]	300	(0-2.07) [0-20.70]
0-200 (0-1.38) [0-13.79]	50	(345) [3.45]	400	(0-2.76) [0-27.60]
0-300 (0-2.07) [0-20.70]	75	(517) [5.17]	500	(3.45) [34.50]
0-400 (0-2.76) [0-27.60]	150 (1.03) [10.34]		500	(3.45) [34.50]

*These points will be used if switch trip point is not specified.

					le
				g
			n
		g	A
	n
	i				WRONG
	t
	n
	u
M	o
					UP

3.Locate the unit in place and secure it by tightening

the 1/8-27 NPT fitting into the desired location (do not overtighten). DO NOT TWIST CASE.

Wiring

How to Order

To order the PSB model use the diagram below.

PSB – –

Pressure Range Specify maximum value from chart above.

Switch Trip Point †

F = Factory set to trip on falling. Specify “F” and the set point value. Example: PSB-100-F20.

R = Factory set to trip on rising, Specify “R” and the set point value.

For units of measure other than psi, specify the set point value followed by unit of measure as follows:

B = Bar

K = kPa/MPa M = kg/cm2 Example: PSB-7B-2B

†Switch set point value will be stated on label.

CAUTION: DISCONNECT Electrical power before wiring.

1.Switch contacts (below) are shown with no pressure applied to the PSB switch.

2. A spade (forked) terminal is recommended for all PSB switch connections.

3.Complete the wiring operation making sure the voltage and current requirements are within the PSB switch electrical rating (see the typical wiring diagram at right).

Normally Closed (N.C.)

www.fwmurphy.com

918.317.4100 Email: sales@fwmurphy.com

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time. MURPHY, the Murphy logo are registered and/or common law trademarks of Murphy Industries, Inc. This document, including textual matter and illustrations, is copyright protected by Murphy Industries, Inc., with all rights reserved. (c) 2006 Murphy Industries, Inc.

Printed in U.S.A. 0591124M

In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.

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