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Square D 9013GH pressure switch with single port and unloader valve

SQUARE D

SQUARE D 9013GH Pressure Switch 145-175 PSI

SKU CH-RPS9-FXHM4

Controls water or air pressure from 145 to 175 PSI with a 24 to 45 PSI differential

  • Product typeLight Switch
  • Reliable pressure control for air compressors and water pumps with factory 145/175 psi settings
  • Broad operating range from 32 to 250 psi suits varied system demands
  • Adjustable differential of 24 to 45 psi allows precise cut-in and cut-out tuning
  • DPST contacts handle up to 5 hp at 240 V three-phase for motor protection
  • NEMA 1 enclosure provides indoor protection for electrical components

Square D 9013GH Pressure Switch

The Square D 9013GH is a DPST pressure switch designed for air compressors and water pumps. It controls motors up to 2 hp at 120 V single phase, 3 hp at 240 V single phase and 5 hp at 240 V or 480 V three phase. The factory on/off setting is 145/175 psi with an adjustable differential of 24 to 45 psi.

Factory Settings and Unloader

The switch ships preset at 145 psi cut-in and 175 psi cut-out across a 32 to 250 psi range. A 1/4 in compression unloader port is integrated to relieve head pressure on compressor restart. Standard action and DPST contacts handle both legs of the supply for safer motor control.

Mounting and Enclosure

A single 3/8 in FNPS port connects directly to the tank or line without extra fittings. NEMA 1 enclosure suits indoor, dry locations only. The compact body fits tight mechanical rooms while the unloader port orientation eases tubing runs. Installers needing outdoor or wash-down ratings must select a different enclosure class.

How it compares

Measured against everything we stock in Electrical Switches & Dimmers, at today’s prices. Recalculated every night.

Price $109.99
Pricier than about 77% of the 791 comparable items (median $39.99).

Specifications

Product
Brand nameSquare D
Product typeLight Switch

Questions about this item

How often will the unloader valve on this 9013GH switch need replacement under normal compressor cycling?

The unloader is a mechanical valve that vents head pressure each cycle; lifespan depends on cycle frequency and air cleanliness, so inspect it during routine compressor maintenance.

At 175 psi cut-out, which component reaches its limit first during sustained high-pressure runs?

The DPST contacts are rated for 2 hp at 120 V single-phase and 5 hp at 240 V three-phase; exceeding those motor loads will stress the contacts before the 250 psi range limit.

How much heat does the switch generate when the compressor runs continuously near the 175 psi setting?

Heat rise is determined by the motor load through the contacts — up to 3 hp at 240 V single-phase or 5 hp at 240/480 V three-phase — not by the pressure setting itself.

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