This vertical compressor pressure switch is a die-cast aluminium, 4 way automatic pressure controller for piston air compressors. It switches the motor on and off to hold the tank in a 0.6 to 0.8MPa working band (90 to 120PSI), and is rated for up to 240V and 15A with a normally closed contact.
Features and benefits:
- Automatic cut-in and cut-out at a working pressure of 0.6 to 0.8MPa (90 to 120PSI, 6 to 8BAR): the compressor refills the tank without anyone watching the gauge
- Rated up to 240V and 15A, with the ratings printed on the switch dial: easy to check against the motor before fitting
- Vertical four hole layout with a G1/4 threaded connector: suits repair jobs where the old switch has the same port arrangement
- Pressure relief valve with a 6mm inner diameter exhaust pipe: lets tank pressure release through the switch
- Red knob marked ON and OFF: manual isolation of the motor during servicing
- Die-cast aluminium body: stands up to workshop vibration and handling
- Electrical lifespan of 100,000 cycles (seller figure)
Applications:
- Replacing a worn or failed pressure switch on a piston air compressor
- Workshop and garage compressor repair
- Spares stock for maintenance engineers
- Rebuilding a compressor controller on a small piston air pump
In the box:
1 x automatic pressure switch, supplied in a white box.
Note: Check the voltage, current and pressure rating against your compressor before fitting. Disconnect the power and release all tank pressure before removing the old switch, and have the wiring done by a competent person. Terminals and wiring must suit your supply.
Product type: Automatic pressure switch, vertical four hole. Ports: 4 way. Maximum voltage: 240V. Supply: 220V. Maximum current: 15A. Maximum pressure: 1.2MPa (175PSI). Working pressure: 0.6 to 0.8MPa (90 to 120PSI, 6 to 8KG/CM2, 6 to 8BAR). Contact type: Normally closed. Connector thread: G1/4 (listed as 1/2 inch). Connector inner diameter: Approx. 12mm. Relief valve thread: 10 x 1 (approx. 9.5mm). Relief valve pipe inner diameter: 6mm. Electrical lifespan: 100,000 cycles. Material: Die-cast aluminium. Drive mode: Electric. Model: A8 vertical single-hole switch (listed as Automatic Pressure Switch). Dimensions: 82 x 52 x 127mm (length x width x height). Net weight: Approx. 300g. Single pack size: 8.6 x 5.4 x 13.1cm. Packaging: White box. Dial markings: Max. Volt 240, Amp 15, Max. Mpa 1.2, PSI 170. Knob: Red, marked ON and OFF. Compatible with: Piston air compressors and air pumps (repair and spare use). Q: How does an air compressor pressure switch work? A: It senses tank pressure and closes the motor circuit when pressure drops, then opens it when the set upper pressure is reached. This one works in a band of 0.6 to 0.8MPa (90 to 120PSI).. Q: What does a 4 way pressure switch mean? A: The listing describes this switch as a 4 way vertical type with four holes. Compare the port layout with your old switch before ordering.. Q: What size thread does this pressure switch have? A: The connector is G1/4 thread with an inner diameter of about 12mm. The pressure relief valve thread is 10 x 1, about 9.5mm.. Q: How do I wire a 220V air compressor pressure switch? A: The switch is rated 240V maximum and 15A, so it suits 220V supplies within that rating. Wiring should be done by a competent person, with power isolated and the tank pressure released first.. Q: How do I replace a pressure switch on an air compressor? A: Isolate the power, release tank pressure, note the wire positions, then unscrew the old switch from the G1/4 port and fit the new one. Reconnect the wiring in the same positions and test the cut-in and cut-out..