Schneider Electric PF-126 Data Sheet

PF-126

Floating Differential Pressure Switch

For use with reversible electric actuated valves,
actuators, or sequence controllers for control of
steam, air, gas, or liquid pressure differential.

Features:

• Adjustable setpoint.

• Usable on steam, air, gas, or liquid.

• Floating action for MP-gear train actuators.

Model Chart

Model No. Description

PF-126 Refer to Specifications.

Specifications

Control range 8 to 60 psi (57 to 414 kPa). Graduated scale and external adjustment screw.

Sensing elements High and low pressure bellows with opposing spring mechanism.

Differential 2 psi (14 kPa) fixed.

Maximum static pressure 180 psi (1241 kPa).

Environment

Ambient temperature limits

Humidity 5 to 95% RH, non-condensing.

Locations NEMA Type 1.

Electrical switch Floating SPD T. Arc suppressor included with unit.

Ratings 1.0 amps at 24 Vac, 60 Hz.

Connections

Electrical Coded screw terminals.

Pressure connectors Two 1/4 in. male flare.

Case All metal with 1/2 in. conduit opening.

Mounting In any position.

Dimensions 7-7/8 H x 4 W x 2 D in. (200 x 102 x 51 mm).

Shipping and storage: -40 to 140qF (-40 to 60qC).
Operating: 35 to 140qF (0 to 60qC).

Typical Applications

CYZR-818-3

Arc Suppressor

1

Packaged with

PF-126

Differential

Pressure Switch

Decrease

in

Differential

202

Blue
Red
White

AC Supply

3

22 7

X

MP-3xx, 4xx,

3

2

4xxx,

97xx

4

5

H

6

5

G

B

R

C

Figure 1 Switch Action and Typical Wiring.

© Copyright 2006 TAC. All Rights Reserved. F-27382-1

1 Install under cover of actuator.

2 Rotates CW or closes valve.

3 Rotates CCW or opens valve.

4 Determine direction of rotation by

looking at end of actuator shaft.

5 These terminals marked L1 & L2

on line voltage actuators.

6 Terminals 1,5 & 6 are used for

built-in aux. switch (if present).

7 R contact makes on pressure

decrease.