Value Brand
Value Brand Press Switch Open on Fall 50 PSI
HVAC low-pressure control opens on falling pressure at 50 psi with 1/4-inch flare connection rated for 150 psi maximum
- Opens on pressure fall at 50 PSI for low-pressure protection
- Handles up to 150 PSI maximum pressure for system safety
- Compatible with 120/240V AC and 24V DC power supplies
- SPST contact form provides simple on/off switching control
- 1/4 inch flare female connection for secure refrigerant line attachment
HVAC Low-Pressure Control Switch
This press switch is a low-pressure control designed for HVAC systems. It opens the circuit on a pressure fall at a fixed 50 PSI setting with a maximum range of 150 PSI. The SPST contact form suits simple on/off control in refrigeration or air-conditioning circuits.
Electrical Ratings and Fixed Differential
Rated for 120/240V AC and 24V DC, the switch handles standard control-circuit voltages. The pressure differential is fixed and not adjustable, so the cut-in point is set by the factory calibration. No time-delay function is included, giving immediate response to pressure changes.
1/4-Inch Flare Connection and Compliance
A female 1/4-inch flare fitting provides a secure, leak-resistant joint without soldering. The fixed differential means installers cannot fine-tune the reset pressure on site. California Proposition 65 warnings apply for cancer and reproductive-harm chemicals.
Highlights
- Opens on pressure fall at 50 PSI for low-pressure protection
- Handles up to 150 PSI maximum pressure for system safety
- Compatible with 120/240V AC and 24V DC power supplies
- SPST contact form provides simple on/off switching control
- 1/4 inch flare female connection for secure refrigerant line attachment
Specifications
| Brand | ZORO SELECT |
|---|
Questions about this item
How do I install the 1/4 in flare pressure switch and what step is often missed?
Connect the 1/4 in female flare fitting to the refrigerant line, then wire the SPST contacts to the 120/240V AC or 24V DC control circuit; the step often missed is confirming the switch is rated for the system's maximum pressure of 150 psi before pressurising.
What maintenance or replacement will the ZORO SELECT press switch need later?
The fixed differential SPST switch has no user-serviceable parts; replace the entire unit if the contacts fail to open on fall at 50 psi or if the flare connection develops a leak.
What limit appears first during sustained operation of this low-pressure control?
The 150 psi maximum pressure rating is the first hard limit; exceeding it can damage the switch mechanism and void the pressure boundary integrity.
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