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Small brass high-pressure switch with flare fitting and electrical terminals

SUPCO

SUPCO SHP350250 High Pressure Switch 250-350 PSIG HVAC Control

SKU CH-0SKQ-QNP2M

A high-pressure HVAC control switch with a fixed 250 to 350 PSIG range, 1/4 inch flare connection and 120/240 VAC SPST contacts

  • Reliable high-pressure protection up to 350 PSIG
  • Precise low-pressure cut-in at 250 PSIG
  • Direct flare fitting on 1/4 in female port
  • SPST contact rated for 120/240 VAC systems
  • Fixed differential setting simplifies installation and calibration

Application scope

The SUPCO SHP350250 is a high-pressure control switch designed for HVAC systems. It opens on pressure rise to protect equipment from over-pressure conditions. The device suits contractors and technicians who need a fixed-setpoint safety control for refrigerant circuits. It is built for direct mounting on 1/4 in flare fittings.

Who it suits and who should look elsewhere

Installers needing a non-adjustable 250 to 350 PSIG cut-out with SPST contacts rated for 120/240 VAC will find this switch matches the spec. Buyers who require an adjustable pressure range, a different connection type, or a low-pressure control should select another model. The fixed differential and factory-set points cannot be altered in the field.

Deciding specification

The critical figure is the fixed operating range of 250 PSIG minimum to 350 PSIG maximum. If the system design calls for a high-side cut-out inside this band and a 1/4 in female flare connection, the switch fits. If the required cut-out pressure falls outside these limits, this part will not satisfy the application.

Highlights

  • Reliable high-pressure protection up to 350 PSIG
  • Precise low-pressure cut-in at 250 PSIG
  • Direct flare fitting on 1/4 in female port
  • SPST contact rated for 120/240 VAC systems
  • Fixed differential setting simplifies installation and calibration

Specifications

BrandSupco

Questions about this item

How can I verify the SUPCO SHP350250 high pressure switch is operating correctly after installation?

Apply system pressure and confirm the SPST contacts open at 350 PSIG and close again when pressure drops to 250 PSIG, matching the fixed differential range.

What components are included with the SUPCO SHP350250 and what must be purchased separately?

The switch itself is supplied with a 1/4 in female flare connection; refrigerant tubing, flare nuts and electrical wiring for the 120/240 VAC circuit are not included.

Which pressure range version of the SUPCO SHP350250 should I select for my system?

This model has a fixed 250-350 PSIG range; choose it only if your design requires a high-pressure cut-out at 350 PSIG and reset at 250 PSIG.

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