This valve is mainly to regulate the shutdown and start-up pressure of the air compressor. --The air pressure regulator is easy to connect and works excellent. It can help to save electric energy when use it.
eBay
DEDEPU Mini Oxygen Bottle Breathing Valve Head, Underwater Breather, Constant Pressure with Switch,Diving Pressure Gauge
Aliexpress UK
Maximum setting pressure: 10 bar. Single phase with 3 ports.
eBay
Vacuum Pressure Gauge 40mm 1/8 BSPT Vacuum Gauge Back Connection for Compressor Water Oil Gas Durable Drop Shipping
Aliexpress UK
Note: Default ON Switch (connected inside). It's not power plug. Don't plug directly into power socket. Switch Form: NC. If you are satisfied with our service, pls. Easy to install and use.
eBay
Airbrush Compressor Pressure Regulator Water Trap Filter Water Moisture Gauge
Aliexpress UK
Durable Material: Made of high quality brass material, it is oil resistant, wear and rust resistant, and durable to use. Item Type: Air Pressure Switch. 1 x Air Pressure Switch. Easy Installation: Easy to install and use.
eBay
Upgraded Flow Switch Boosting Pump Automatic Electronic Control Switch for Shower Low Water Pressure Solar Heaters R9UF
Aliexpress UK
1port 3-phase / 380V /400V20A. Colour: Transparent. Easy to install and Easy to operation.
eBay
Automatic Water Pressure Booster Pump Switch G3/4 to G3/4 Brass Electronic Water Flow Controller Switch Shortage Protection
Aliexpress UK
This 240V Air Pressure Switch is Suitable for most types of single phase compressors 1-3 HP. It is fitted with an unloader valve which prevents the compressor starting under load And an auto On/Off button for manual compressor shut off.
eBay
BJZ037 220V 380V AC Water Pump Pressure Switch Automatically Controlled Electronic Switch Water Shortage Protection Adjustable
Aliexpress UK
Improves efficiency and compressor performance. Dual pressure gauges for clear monitoring. 1 x Air Compressor. Pressure switch for automatic start/stop operation. Safety relief valve for added protection.
eBay
Normally Closed Low Pressure Water Level Float Switch Liquid Level Sensor Vertical Float Switches Water Level Sensor 75MM/85MM
Aliexpress UK
1x diaphragm pressure switch. Adjustable pressure switch NC (normally closed). Working form: adjustable pressure. You need an air receiver (small 500ml canister or more) for the switch to work, don't rely on line pressure.
eBay
New Digital Tire Pressure Gauge 0-150 PSI Backlight High-precision Car Barometers Tester Gauge Air Pressure Meter LCD Display
Aliexpress UK