Pressure Switches
Electric–Pneumatic Relays: Plastic
The EP101 series is a plastic 3-way valve with molded barbed connections for 1/4'' pneumatic tubing. They can be wall or panel mounted. Lighter and more compact than our EP201 series. Ports are marked 1-2-3. Flow is 600 SCIM at 20psi. The Pneuline models are an exact substitute for the brands on this selection chart:
| PNEUMATIC RELAY CROSS-REFERENCE CHART | |||
|---|---|---|---|
| Pneuline | Honeywell | Barber-Colman | Landis & Gyr Powers |
| EP101-24 | RP818A1012 | AL-180 | 265-1001 |
| EP101-120 | RP418A1107 | AL-181 | 265-1002 |
| EP101-208 | RP418A1081 | AL-182 | 265-1003 |
| EP101-240 | RP418A1099 | AL-183 | 265-1004 |
| EP101-277 | RP418A1073 | — | 265-1005 |
| EP101-480 | RP418A1065 | AL-185 | 265-1006 |
| EP102-24 | RP818B1010 | AL-170 | 265-1007 |
| EP102-120 | RP418B1071 | AL-171 | 265-1008 |
Electric–Pneumatic Relay: Metal
Change branch or main signals from one source or pressure to another with this compact, 3-way diverting solenoid valve. Ideal for occupied– unoccupied, outdoor changeover, summer–winter or many other uses.
The EP201 is a cast metal valve with 1/8'' NPT ports marked N.O., N.C., and common. Includes two barbed fittings for either 1/4'' or 5/32'' pneumatic tube. The Pneuline models are an exact substitute for the devices in this selection chart:
Electric–Pneumatic Relay: Miniature
- High capacity miniature EP relay
- Metal body at a popular price
- Compact size is convenient for panel mounting
- For up to 120psi
- 3-way, 1/8'' FPT connection
Pneumatic–Electric Relay: DPST
The PE201 closes or opens an electrical circuit using a predetermined air pressure signal. Typical applications includes the control of air conditioners, fans, electrical heating elements, ducts furnaces and more.
Connection: 1/4'' barb
Switch: 12A
Signal: 3 to 30 psi adjustable
Pneumatic–Electric Relay: SPDT
The PE301 series switches are SPDT snap switch activated by an adjustable pneumatic signal. Typical uses are to activate fans, heaters, pumps, chillers, alarms and more.
Connection: 1/4'' barb
Switch: 16A
Signal: 3 to 30 psi adjustable
Pneumatic–Electric Relay: Two-stage
The P10FC-4 provides two-stage pressure electric control for self-contained heating-cooling unit ventilators with mechanical refrigeration.
Connection: 1/4'' barb
- Features two enclosed snap-acting SPDT switches with color-coded terminals
- Includes a calibrated indicator scale for the high trip point
Johnson Controls Pneumatic–Electric Relay: Duplex
The P10PA provides continuous fan operation and damper control during day cycle and intermittent fan operation during night cycle. It has three normally closed SPST switches. Two of the switches are mechanically joined and operate together.
3-SPST 6A Switches: 1 opens high 6#, 2 & 3 open high 18#
Connection: 1/4'' barb
Signal: 3 to 30 psi adjustable
- Three enclosed normally closed SPST switches
- Factory calibration of the mechanically joined switches
- Two calibrated indicator scales to display high trip points
Pneumatic Relays
Pneumatic relays perform very useful functions in control systems. All brands work in the same pneumatic signals and can be easily interchanged. Don’t be stuck on a single brand. Pneuline Controls perform the same function just as reliably as brands costing more than double. Standardize and stock one model and use it as your universal replacement. This chart will show you the Pneuline model you need.
| PNEUMATIC RELAY SELECTION CHART | |||||
|---|---|---|---|---|---|
| Relay Type | Pneuline | Powers | Kreuter | Johnson | Honeywell |
| Diverting-Switching | RPP100 | 243-0001 | RCC-1009 | V-6135-1 | RP670A1001 |
| HI-Pressure Selector | RPP400 | 243-0018 | RCC-1008 | C-5226-3 | RP470A1003 |
| Low-Pressure Selector | RPP500 | 243-0020 | RCC-1006 | C-5226-3 | RP970A1008 |
| Hi & Lo Pressure Selector | RPP900 | 243-0019 | RCC-1111 | C-2220 | RP913A1008 |
| Booster-Repeater Ratio-1:1 | RPP700 | 243-0009 | RCC-1516 | R-2080-1 | RP970A1008 |
| Reversing | RPP300 | RCC-1504 | R-3030-1 | RP972A1006 | |
| Min. Position | — | — | C-5230-2 | SP970A1005 | |
| Averaging | RPP800 | 243-0011 | RCC-1514 | C-2040-1 | RP973A1013 |
Differential Pressure Switch
The Differential Pressure Switch senses the operation of fans or blowers associated with ducted ventilation systems, and static pressure drop across filters. Pressure differentials as small as .05" W.C. are sufficient to actuate the SPDT contacts, which operate remote status indicators, alarms, control circuits or other devices.
- Responds to positive, negative, or differential air pressure
- Furnished with one 6'' piece 1/4'' O.D. flexible tubing, nuts, and ferrules.
- Can be mounted in any position
- 1/4'' compression connections
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.
- 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 Out
This switch provides low or line voltage control of pressure for air and noncombustible gases. It controls static pressure, differential static pressure, velocity pressure, total pressure, or differential total pressure.
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.
Connection: 3/8'' O.D. Barb
Don’t Forget …
When installing these pressure switches, you’ll need sensing tubes, fittings and tubing.
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.
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.
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.
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.
