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9012 & 9013 Pressure Switches

Square D by Schneider Electric LogoSquare D’s 9012 and 9013 Pressure Switches lineup offers a comprehensive portfolio of highly reliable fluid control solutions essential for modern hydraulic, pneumatic, and water management systems. Engineered for precise setpoint regulation, exceptional durability, and robust pressure monitoring, this range includes advanced electromechanical pressure switches, pump controllers, and compressor switches designed to optimize system flow across commercial and industrial facilities. By integrating Square D 9012 and 9013 switches into your fluid networks, you unlock accurate pressure management, enhanced equipment lifespan, and dependable operational safety in demanding environments.

Square D 9012 GAW21 Pressure Switch Series C

Square D 9012 GAW21 Pressure Switch Series C

Square D 9012 GCW-2 Pressure Switch 90-2900 PSI Series C

Square D 9012 GCW-2 Pressure Switch 90-2900 PSI Series C

Square D 9012 GCW-3 Pressure Switch Series C

Square D 9012 GCW-3 Pressure Switch Series C

Square D 9012-GGW-1 Differential Pressure Switch 480VAC 10A 5 PSID

Square D 9012-GGW-1 Differential Pressure Switch 480VAC 10A 5 PSID

Square D 9012 GGW-4 Differential Pressure Switch 0.03-2.5 Bar 240 Psig 600V

Square D 9012 GGW-4 Differential Pressure Switch 0.03-2.5 Bar 240 Psig 600V

Square D 9012GNG1 Pressure Switch 2-10 PSIG

Square D 9012GNG1 Pressure Switch 2-10 PSIG

Square D 9036DG2 Open Tank Float Switch NEMA 1 Close on Rise

Square D 9036DG2 Open Tank Float Switch NEMA 1 Close on Rise

Square D 9036DG2R Pumptrol Open Tank Float Switch

Square D 9036DG2R Pumptrol Open Tank Float Switch

Square D 9012 FHGS5 Pressure Switch 100-600 PSI Two Piece

Square D 9012 FHGS5 Pressure Switch 100-600 PSI Two Piece

Square D 9012 AEW25 Pressure Switch 10A 600V 0-20 PSI Differential

Square D 9012 AEW25 Pressure Switch 10A 600V 0-20 PSI Differential

Square D 9012 GAW-2 Pressure Switch Series C

Square D 9012 GAW-2 Pressure Switch Series C

Square D 9037EW9 Liquid Level Float Switch

Square D 9037EW9 Liquid Level Float Switch

Need Expert Square D 9012 & 9013 Sourcing?

Square D (by Schneider Electric) Class 9012 industrial machine tool pressure switches and Class 9013 Pumptrol™ water pump and air compressor pressure switches form the electromechanical sensing backbone for liquid and gas distribution lines. Because maintaining precise system pressure loops requires an exact alignment of operating pressure ranges, differential limits, fluid media compatibility, contact pole configurations, and enclosure NEMA ratings, sourcing direct-fit replacement hardware is essential for preventing system faults or pump short-cycling. Contact our dedicated industrial control sourcing team today to locate your specific 9012 industrial pressure switch, 9013 Pumptrol switch, or replacement contact block.

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Worked Examples: Decoding Square D Catalog Numbers

Square D Class 9012 and 9013 catalog numbers follow a structured positional sequence that defines product family class, sensing element mechanics, enclosure protective ratings, contact switching logic, and preset factory pressure ranges. Review our technical breakdowns below.

Class 9012 Heavy-Duty Industrial Pressure Switch

• 9012GAW1 — Type G NEMA 4/4X/13 Diaphragm Industrial Pressure Switch

9012 (Class 9012 Heavy-Duty Industrial Machine Tool Pressure Switch Family) • G (Type G Product Line) • A (Diaphragm-Actuated Sensing Element for non-corrosive liquids and gases) • W (NEMA 4, 4X, 13 Watertight, Dusttight, and Corrosion-Resistant Enclosure) • 1 (0.2 to 10 PSI Operating Pressure Range with SPDT Form C Single-Pole Double-Throw Contacts)

Class 9013 Pumptrol™ Water Pump Pressure Switch

• 9013FSG2J21 — Type FSG 30-50 PSI Water Pump Pressure Switch

9013 (Class 9013 Commercial & Agricultural Pressure Switch Series) • FSG (Type FSG Standard Water Pump Switch Line) • 2 (Standard 2-Pole NEMA 1 Open Frame Construction) • J21 (Factory Preset Cut-In at 30 PSI / Cut-Out at 50 PSI with a 1/4″ NPT Internal Thread Fluid Connection)

Class 9013 Air Compressor Pressure Switch

• 9013FHG12J52 — Type FHG Air Compressor Switch with Unloader Valve & Off-Auto Lever

9013 (Class 9013 Series) • FHG (Type FHG High-Pressure Air Compressor Switch Line) • 12 (NEMA 1 Enclosure with 2-Pole Switching) • J52 (Factory Preset Cut-In at 70 PSI / Cut-Out at 90 PSI, equipped with a 2-way Pressure Release Unloader Valve and Manual Toggle Lever)

Industrial Sourcing & Maintenance Tip: When replacing a Class 9013 Pumptrol™ switch on a water pump or air compressor, never attempt to resolve pressure drop issues solely by cranking down the differential adjustment nut. Over-tightening the internal spring can permanently bind the contact diaphragm, leading to rapid motor short-cycling and premature motor burnout. Additionally, when choosing between Class 9012 and 9013 switches, remember that Class 9012 switches are engineered for high-cycle industrial hydraulics and harsh NEMA 4X process environments, whereas Class 9013 switches are optimized for commercial water systems and air compressors.

Square D 9012 & 9013 Pressure Switches FAQ

Maintaining dependable fluid lines and selecting proper replacement pressure switches requires a clear understanding of product series, preset J-codes, and sensing element mechanics. Review our expert answers below.

What is the fundamental difference between Square D Class 9012 and Class 9013 pressure switches?
Class 9012 switches are heavy-duty NEMA-rated industrial machine tool pressure switches built for high-cycle hydraulics, machine tools, and aggressive process fluids (pressure ranges up to 9,000 PSI, housed in rugged NEMA 4/4X enclosures). Class 9013 (Pumptrol™) switches are general-purpose commercial switches designed specifically for water pumps, agricultural irrigation systems, and air compressors (pressure ranges typically up to 250 PSI, housed in NEMA 1 or 3R enclosures).

What do the pressure setting codes (like J21, J24, or J52) mean on 9013 Pumptrol switches?
The “J-code” suffix indicates the factory preset cut-in and cut-out pressure setpoints. For example, J21 designates a 30–50 PSI setting (cut-in at 30 PSI, cut-out at 50 PSI), J24 designates 40–60 PSI, and J52 designates 70–90 PSI for air compressor applications. Matching the exact J-code ensures the replacement switch functions immediately without manual field calibration.

How do I choose between diaphragm, bellows, and piston sensing elements on 9012 industrial pressure switches?
Diaphragm-actuated 9012 switches (Type A/G) are best for low to medium pressure (0.2 to 500 PSI) with fast response times. Bellows-actuated models provide exceptional sensitivity for precise low-pressure differential loops. Piston-actuated models are required for heavy high-pressure hydraulics (up to 9,000 PSI) where severe pressure surges and hydraulic shock loads occur continuously.

What is the function of the pulsed unloader valve option on 9013 air compressor switches?
The mechanical unloader valve releases trapped high-pressure air from the compressor pump head and discharge line the moment the pressure switch trips to the “Off” position. By eliminating head pressure against the compressor piston, the electric motor can restart easily on the next cycle without pulling excessive locked-rotor starting current or tripping thermal overloads.

Can Class 9013 water pump switches be used for air compressors?
While basic 9013FSG water pump switches can physically sense air pressure, dedicated air compressor models (like the 9013FHG or 9013FYG series) feature higher pressure differentials, integrated manual Off-Auto toggle levers, and pressure release unloader valves specifically engineered to protect compressor motors during startup.

Ready to locate your replacement Square D pressure switch?

TCI Supply carries an extensive inventory of active and legacy Square D Class 9012 NEMA 4X industrial pressure switches, 9013 Pumptrol™ water pump switches, air compressor switches, and unloader valve accessories. Contact our technical team directly at 1-800-755-2883 or email an image of your equipment data tag to receive a fast, competitive quote.

 

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