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Square D 9012G pressure switch, grey NEMA 1 enclosure, 1/4 inch FNPT port

SQUARE D

SQUARE D 9012G Pressure Switch 1-40PSI NEMA1

SKU CH-807X-ZTZ8R

Adjustable 1-40 psi pressure switch with 1/4-18 NPT port, 1NO/1NC contacts and NEMA 1 rating

  • TypeLight Switch
  • Adjustable pressure range 1 to 40 psi for flexible system control
  • NEMA 1 enclosure protects contacts in indoor environments
  • Diaphragm actuation handles media temperatures from -40 to 250 degrees F
  • AC contacts rated 3 A at 240 V and 6 A at 120 V for reliable switching
  • Differential adjustment 1.2 to 3.6 psi allows precise cut-in and cut-out settings

Pressure Switch 1-40 PSI Range

This Square D 9012G pressure switch controls circuits in air or water systems between 1 and 40 psi. It suits installers who need a NEMA 1 rated device for indoor, non-hazardous locations. The 1/4-18 FNPT port connects directly to standard piping. It is not for buyers who need an outdoor or wash-down rated enclosure.

Thermals Noise and Power Draw

The switch operates in ambient temperatures from -10 to 185 degrees F and handles media up to 250 degrees F. It carries 3 A at 240 V AC or 6 A at 120 V AC without external cooling. DC loads are rated at 0.22 A at 125 V and 0.27 A at 250 V. No fan or active cooling is required during normal cycling.

Sustained Load Behaviour

The diaphragm actuation tolerates continuous pressure within the 1 to 40 psi range and a differential of 1.2 to 3.6 psi. Contacts maintain their 1NO/1NC rating during extended operation at the listed voltage and current limits. The NEMA 1 enclosure protects internal components from incidental contact indoors. It is not suited for applications that exceed the stated media temperature or pressure limits.

Highlights

  • Adjustable pressure range 1 to 40 psi for flexible system control
  • NEMA 1 enclosure protects contacts in indoor environments
  • Diaphragm actuation handles media temperatures from -40 to 250 degrees F
  • AC contacts rated 3 A at 240 V and 6 A at 120 V for reliable switching
  • Differential adjustment 1.2 to 3.6 psi allows precise cut-in and cut-out settings

Specifications

BrandSquare D
TypeLight Switch

Questions about this item

How do I install the 9012G pressure switch and what is the common mistake with the 1/4-18 FNPT port?

Connect the switch to the 1/4-18 FNPT port using appropriate sealant; the step often missed is applying thread sealant correctly to prevent leaks at the 1-port connection.

What maintenance will the diaphragm actuation need over time?

The diaphragm actuation may require inspection for wear or debris; replace the switch if pressure differential drifts outside the 1.2 to 3.6 psi range or contacts fail.

What is the first limit reached under sustained use at high temperature?

The ambient temperature limit of 185 degrees F is reached first, restricting operation before the 250 degrees F media temperature limit.

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