Hubbell brand formerly known as Furnas, air compressor pressure switch most commonly used for climate control applications. Model 69HAU3 comes pre set with a cut-in pressure of 30 psi and a cutout pressure of 40 psi. This switch has a heavy-duty metal housing, a larger diaphragm for more accurate pressure reading at the lower psi settings of the switch, and an unloader valve on the side to unload pressure once the switch shuts off. Note: If you don't need the unloader it does not need to be hooked up and it will not affect the functionality of the switch.
Specifications:
• Brand: Hubbell
• Metal Housing Construction
• Preset for 30-40 PSI
• Minimum cut-in: 15 PSI
• Max cut out: 60 PSI
NOTE: 1/4" Female NPT Air Connection. (Note: 1/4" measures about 1/2" in diameter.)
• Can be used in single or three phase.
• Equipped with unloader valve.
• Max HP Ratings: On 120 Volt single phase- 2 hp,
• Max HP Ratings: On 240 volt single phase-3 hp
• Max HP Ratings: On three phase 240 volt-5 hp
• Max HP Ratings: On three phase 480/600 volt- 5 hp.
Note: If used in conjunction with a magnetic starter this switch can be used on larger compressors because amperage is not an issue at that point.
