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Pneumatic Switches

Pneumatic-Electric High/Low Alarm Switch

3-15# In - 2 SPDT Out

The switch is used to provide high and low signal alarm. Two independently adjustable SPDT switches provide 3 to 15 psig high and low alarm contact capability in this single device.

ORDERING INFORMATION
ORDER # DESCRIPTION
R470 2-SPDT P-E Switch

Each 10A switch adjustable between 1 and 27 psig


Pneumatic-Electric Pressure Switch

3-15# In - Electric Out

For on-off control of electrical devices such as air compressors, fans, pilot lights, etc., by the use of a predetermined air pressure signal.

ORDERING INFORMATION
ORDER # SWITCH DIFFERENTIAL
PC-110 SPDT 1 to 5 psi adj.
PC-131 DPST Opens On Rise 1-1/2 to 20 psi adj.
PC-132 DPST Opens On Fall
PC-141 DPDT 5 psi fixed
PC-151 3 SPST Adj.


Pressure Controllers

Pressure In - SPDT Floating Out

 For the proportional pressure control of steam, air, gases, or liquids.

ORDERING INFORMATION
ORDER # RANGE DIFFERENTIAL
PP-221 20'' Vac to 10# 1 to 3#
PP-222 0 to 20#
PP-223 10 to 60# 2-1/2 to 7-1/2#
PP-224 50 to 150# 5 to 15#
PP-225 100 to 250# 7-1/2 to 22-1/2#
PP-226 216 to 360#


Pneumatic Flow Switch

The No. FS7-4A is a variation of the No. FS7-4 which substitutes an air valve for the electrical switch. Can be used to control pneumatic operated relays or valves when flow starts or stops. When flow drops below the necessary rate, the air valve opens, bleeding pressure from the control system.

ORDERING INFORMATION
ORDER # DESCRIPTION
F40EA-1 Johnson Pneumatic Flow Switch
FS7-4A McDonnell-Miller Pneumatic Flow Switch


Pneumatic–Electric Switches

P67 models are used to make or break 1 or 2 electrical circuits using a pneumatic signal. Typical uses include control of fans, compressors, and other electrical devices.

 

ORDERING INFORMATION
ORDER # SWITCH RANGE DIFF.
P67AA-1 DPST Opens on Fall 3–30# 1-1/2 to 20
P67CA-1 DPST Opens On Rise 3–30# 1-1/2 to 20


Pneumatic Differential Pressure Switch

Low Pressure In - Pneumatic Out

The PDP300 switch senses the flow of air in ducts or where differential pressure exists. Fan interlocking is very common. It includes a bracket for direct or surface mounting.

ORDERING INFORMATION
ORDER # DESCRIPTION
PDP300 .12 to 2.0'' WC-Close High
SP401 4'' flanged sensing tube, 2 fittings and gasket
  • Connections: High-1/8'' FPT, Lo-1/8'' FPT, Out-1/4'' Barb
  • Max. Pressure: 1 psig


Air Flow Pressure Switch

Low Pressure In - SPDT Floating Out

These switches are used with reversible electric actuators to control differential pressures, low static pressures, or air velocities in duct systems.

ORDERING INFORMATION
ORDER # RANGE (in WC) VELOCITY (FPM)
PF-305 –0.5 to +0.5 400 to 2800
PF-306 0.2 to 1.3 1800 to 4600
PF-307 1.1 to 3.5 4200 to 7500
PF-308 3.2 to 10 7200 to 14000

Connection: 3/8'' O.D. Barb

Don’t Forget …
When installing these pressure switches, you’ll need sensing tubes, fittings and tubing.

These switches are designed to be compatible with any brand of pneumatic control system. Replaceable scale plates give you a variety of system functions. Standardizing on these switches will reduce your costs and help you become familiar with a single replacement for all uses.


Universal Pneumatic Gradual Switch

This manual switch is used to provide a variable pneumatic signal to any brand of pneumatic device. Used for remote positioning or as a testing device.

ORDERING INFORMATION
ORDER # DESCRIPTION
YMC-1001 Pne. Grad. Switch
SCALE PLATES (NOT INCLUDED)
HDO-1101 BLANK
HDO-1102 0 to 100%
HDO-1103 Increase CW Arrow


2 Position Pneumatic Selector Switches

This manual selector switch is used to direct one or two signals to either one of two ports. Ten scale plates available to perform a variety of functions. Vented and non-vented models are available.

ORDERING INFORMATION
ORDER # DESCRIPTION
YMC-2001 DPDT-Non-Vented
YMC-2002 DPDT-Vented
SCALE PLATES (NOT INCLUDED)
HDO-1201 Occ-Unocc
HDO-1202 Summer-Winter
HDO-1203 On-Off
HDO-1205 Open-Close
HDO-1206 1-2
HDO-1207 Day-Night
HDO-1208 Heat-Cool
HDO-1209 Manual-Auto


3 Position Pneumatic Selector Switches

This manual selector switch is used to switch a pneumatic signal to one of three ports. Eight scale plates available to perform a variety of functions. Vented and non-vented models available.

ORDERING INFORMATION
ORDER # DESCRIPTION
YMC-3001 3 Position Non-Vent
YMC-3002 3 Position Vented
SCALE PLATES (NOT INCLUDED)
HDO-1301 1-2-3
HDO-1302 On-Auto-Off
HDO-1303 Day-Auto-Night
HDO-1305 Heat-Auto-Cool
HDO-1306 Summ.-Auto-Wint.
HDO-1307 Open-Auto-Close


6 Position Pneumatic Selector Switch

This manual selector switch can be used to switch a pneumatic signal to one of six ports. It’s economical cost make it a good choice for any multiple switching function of six or less positions.

ORDERING INFORMATION
ORDER # DESCRIPTION
YMC-6001 6-Pos. Non-Vented
SCALE PLATES (NOT INCLUDED)
HDO-1101 BLANK
HDO-1601 1-2-3-4-5-6
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