Murphy PSB - Manual

PSB-9104B page 1 of 2

Description

The PSB switch is a direct mount switch for
c r i t i c a l p r e s s u r e p o i n t s . I t h a s o n e l i m i t
contact that can be used to activate an alarm,
a c t u a t e i n d i c a t o r l i g h t s o r s h u t d o w n
equipment.

The construction of this instrument is the
s a m e a s o u r t i m e - p r o v e n S w i c h g a g e

®

i n s t r u m e n t . A p r e c i s i o n m a c h i n e d b r a s s
mounting plate and port captures a high
q u a l i t y s t a m p e d b e r y l l i u m c o p p e r
diaphragm. The single-pole, double-throw
(SPDT) snap-switch is operated directly
from the diaphragm for quick acting and
p o s i t i v e s w i t c h i n g . Tr i p p o i n t i s f a c t o r y
preset according to your specifications.

Housing is weather sealed to prevent entry of
m o i s t u r e , d u s t , e t c . A g l a s s - f i l l e d n y l o n
terminal block with quick screw terminal
connections gives the PSB switch a real
advantage in industrial engine applications.
The PSB is ideal when reading is not desired,
b u t p r e s s u r e i s c r i t i c a l t o o p e r a t i o n a l
efficiency.

Intended for use in general purpose non-
classified areas.

Applications

•

Engine Lubrication

•

Water pumps

•

Compressors

•

Oil field systems

•

Irrigation systems

•

Construction Equipment

•

Mobile Equipment

•

Marine engines

•

Generators

Features

•

Fits all engine applications

•

SPDT snap-switch

•

Activates indicator lights, alarms, or shut

down equipment

•

Time-proven SWICHGAGE

®

construction

•

Easy wiring terminal block

•

Steel housing specially coated to resist

corrosion

•

Factory preset to your specifications

Specifications

Housing:

Plated steel.

Pressure Connection:

1/8-27 NPT, Brass.

Diaphragm:

Formed beryllium copper (heat

treated).

Pulsation Dampener:

Brass (it is removable

for cleaning).

Terminal Block:

Three #4-40 screws.

Accuracy:

Trip point:

±3% of full scale.

Switch reset differential:

±7% of full scale.

Repeatability:

±1% of full scale.

Contact Rating:

SPDT 3 A @ 30 VDC

inductive.

Maximum Pressure:

See

Trip Point Chart

on reverse side.

Temperature Range:

Ambient= -40°F (-40°C) thru 150°F (66°C).
Process= -40°F (-40°C) thru 250°F (121°C).

Factory Trip Point Setting:

See

Trip Point

Chart

(on back).

Pressure Range:

Specify from 0-400 psi (0-

2.76 MPa) [0- 27.58 bar]. See

Trip Point

Chart

on reverse side.

Contact:

Operates on rising or falling

pressure (specify).

Shipping Weight:

8 oz. (0.25 kgs).

Shipping Dimensions:

3 x 2-3/4 x 2-3/4 in.

(76 x 70 x 70 mm).

NOTE:

No customer replacement parts.

■

Limit Switch for Critical Pressure

■

Operate Alarms or

Shutdown Equipment

■

SPDT Snap-Acting Switch

■

Fits Most Engine Applications

**Products covered by this bulletin comply with EMC Council directive 89/336/EEC

regarding electromagnetic compatibility except as noted.

**

Model PSB

PSB-9104B

Revised 03-06

Catalog Section 05

(00-02-0031)

Direct Mount Pressure Switch