Atlanta Counter Differential Pressure Selection Guide


Air Regulators & Filter Regulators

Air pressure regulators are used to provide a constant outlet of pressure, separately from the inlet pressure or flow. They are most commonly used to reduce the pressure level required for downstream equipment, stabilizing the force applied to cylinders or minimizing pressure variation. Below are some of the Air Regulators that we keep in stock.

Part Number Size Gauge Auto Drain Filter & Regulator Series
34203150 1/4in 112
34204170 1/8in Semi 107
34225019 1/8in Regulator 105

Compressed Air Dryers

A refrigerated compressed air dryer is a type of compressed air dryer, used to dry compressed air. Compressed air always contains water, coming from the air that is sucked in by the compressor. To protect your piping, tools and equipment, it's best to use a compressed air dryer to dry the air.

Part Number SCFM Refrigerant Brand Accessories
HPR5-10 10 R134a Hankinson
A-4412-1 12 Johnson Controls


P/E Switches

A pneumatic switch is a device that activates or deactivates an electrical signal in a system based on the level of air pressure detected by the component. Below you will find the P/E switches that we keep in stock at the Atlanta warehouse.

Part Number Description Brand
3008 Pressure Switch w/ 3-15 Psi, w/ 3/16in Fitting. Mounts Through 3/32in Thick Panel. Honeywell
CCE-3001 P-E Switch Setpoint 2-20psi One Stage KMC
P10BC-7C SPDT 3-20 Psi 1Stage Press Sw Johnson Controls Johnson Controls
P658E1167 P/E Switch, 2-25 PSI Setpoint Range, 1 PSI Diff Pressure Range, Panel Mount, Barb Fitting Air Connection for 1/4" OD Plastic Tubing Honeywell
CCE-1001 P-E Switch 2-25psi SPDT w/ Cover Honeywell
CCE-3002 2-Stage PE Switch KMC
P10FC-4C 2 Stage PE, 3-20# SPDT, with a 4psi Diff Johnson Controls
P658E1001 2-17 PSI Setpoint Range, 1 PSI Diff Pressure Range, Panel Mount, Barb Fitting Air Connection for 1/4" OD Plastic Tubing Honeywell
PC-110 P/E Pressure Switch, Two Position, Surface or Track Mount, Switch Action: SPDT Schneider Electric


Pneumatic Reversing Relays

A Pneumatic Reversing Relay is a modulating relay suitable for all types of heating and air conditioning control systems. It is used as a reversing relay to reverse and increase the capacity of the branch line pressure to the final control element.

Part Number Mounting Bracket Description SCIM Brand
RCC-1001 Reversing Relay Calibrated at 9 PSI 17.3 KMC Controls
RCC-1101 Reversing Relay Calibrated at 9 PSI 17.3 KMC Controls
RCC-1501 Reversing Relay Calibrated at 8 PSI (In-Line Style) 28.8 KMC Controls
RCC-1502 Reversing Relay Calibrated at 9 PSI 28.8 KMC Controls
RCC-1503 Reversing Relay Calibrated at 9 PSI (In-line Style) 28.8 KMC Controls
RCC-1112 Reversing Relay Calibrated at 8 PSI 17.3 KMC Controls
2360-501 Reverse Input Signal, 20 Psig Normal Operating Main Air Pressure 29 Schneider Electric
RP972A1006 Reverse Input Signal, 30 Psig Normal Operating Main Air Pressure 18.3 Honeywell
R-3030-1 1: 1 Ratio, 20 Psig Nominal Supply Pressure, w/ 1/4in OD Connections 10 Johnson Controls
243-0024 10-30 PSI Operating Range, Factory Set at 15PSI 29 Siemens

Electric to Pneumatic 3-Way Valves

EP Three-way Valves are commonly-used to alternately apply pressure to and exhaust pressure from pneumatically-controlled devices, such as valves and damper actuators, by an electrical input energizing or de-energizing the solenoid of the valve.

Part Number Mounting Voltage Brand
V11HGA-100 Conduit 24Vac Johnson Controls
V11HAA-100 Conduit 120Vac Johnson Controls
V11HCA-100 Conduit 208Vac Johnson Controls
V11HBA-100 Conduit 240Vac Johnson Controls
V11HBA-100 Conduit 240Vac Johnson Controls
V11HFA-100 Conduit 277Vac Johnson Controls
V11HDA-100 Conduit 440/480Vac Johnson Controls
AL-170 Open Frame 24Vac Schneider Electric
AL-171 Open Frame 120Vac Schneider Electric
AL-180 Junction Box 24Vac Schneider Electric
AL-181 Junction Box 120Vac Schneider Electric
265-1027 Open Frame 24Vac Siemens
265-1028 Open Frame 120Vac Siemens
265-1021 Junction Box 24Vac Siemens
265-1022 Junction Box 120Vac Siemens
RP418A1081 Open Frame 208Vac Honeywell