025490_S_000 Pressure Switches

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17 Products

About Pressure Switches

Switch

Switch With Air Exhaust Valve

Maintain the air pressure needed for air-powered devices. These switches turn your electric air compressor off when it reaches the set pressure and on when it reaches the reset pressure. All are NEMA rated to protect their parts from dirt and stand up to some corrosion, but they shouldn’t be used outdoors. UL listed and CSA certified, all meet American and Canadian safety standards. Those that are CE marked meet European safety standards.

Switches with an air exhaust valve release the air between the cylinder and check valve when the compressor shuts off, reducing stress on the compressor’s motor. This extends the life of the motor and makes for an easier startup each time.

Switches with plastic housing stand up to corrosion.

For technical drawings and 3-D models, click on a part number.

					Max. Horsepower
Setpoint, psi	Reset Point, psi	Approximate Difference Between Setpoint and Reset Point, psi	Max. Continuous Pressure, psi	Accuracy	AC (Single Phase)	AC (Three Phase)	DC	Wire Connection Type	Environmental Rating		Each
Switches
Polypropylene Plastic Housing—1/4 NPSF Female Pipe Connection
20-80	5-60	22	80	±3%	2 hp @ 115 V AC 3 hp @ 230 V AC	3 hp @ 115 V AC 5 hp @ 230 V AC	1 hp @ 115 V DC 1 hp @ 230 V DC	Screw Terminals	NEMA 1	0000000	000000
40-100	20-80	20	100	±3%	1 1/2 hp @ 115 V AC 2 hp @ 230 V AC	2 hp @ 115 V AC 3 hp @ 230 V AC	__	Screw Terminals	NEMA 1	0000000	00000
60-200	40-170	30	200	±3%	2 hp @ 115 V AC 3 hp @ 230 V AC	3 hp @ 115 V AC 5 hp @ 230 V AC	1 hp @ 115 V DC 1 hp @ 230 V DC	Screw Terminals	NEMA 1	0000000	00000
100-200	60-160	40	200	±3%	1 1/2 hp @ 115 V AC 2 hp @ 230 V AC	2 hp @ 115 V AC 3 hp @ 230 V AC	__	Screw Terminals	NEMA 1	0000000	00000
Switches with Air Exhaust Valve
Polypropylene Plastic Housing—1/4 NPSF Female Pipe Connection
20-80	5-60	22	80	±3%	2 hp @ 115 V AC 3 hp @ 230 V AC	3 hp @ 115 V AC 5 hp @ 230 V AC	1 hp @ 115 V DC 1 hp @ 230 V DC	Screw Terminals	NEMA 1	0000000	000000
40-100	20-80	20	100	±3%	1 1/2 hp @ 115 V AC 2 hp @ 230 V AC	2 hp @ 115 V AC 3 hp @ 230 V AC	__	Screw Terminals	NEMA 1	0000000	00000
60-200	40-170	30	200	±3%	2 hp @ 115 V AC 3 hp @ 230 V AC	3 hp @ 115 V AC 5 hp @ 230 V AC	1 hp @ 115 V DC 1 hp @ 230 V DC	Screw Terminals	NEMA 1	0000000	000000
100-200	60-160	40	200	±3%	1 1/2 hp @ 115 V AC 2 hp @ 230 V AC	2 hp @ 115 V AC 3 hp @ 230 V AC	__	Screw Terminals	NEMA 1	0000000	00000

Pressure Switches for Water Pumps

Switch

Switch with Manual On/Off Lever

Activate or deactivate your electric water pump based on water pressure. These switches turn your pump off when pressure increases to the set pressure and on when pressure drops to the reset pressure. All are NEMA rated to stand up to some corrosion, but they shouldn’t be used outdoors. UL listed and CSA certified, switches meet American and Canadian safety standards.

Use switches with a manual on/off lever to turn off your system for maintenance or for long periods of time. When you turn them back on, they’ll resume pump control and remember their pressure setpoints.

Switches with low-pressure cutoff turn your pump off if water pressure dips 10 psi lower than the reset pressure. This stops the system from pumping when there’s an issue in your line, such as a leak or break, to avoid flooding or other damage. These switches will also resume pump control with their previous setpoints when turned back on.

Switches with pressure surge protection won’t activate during brief periods of high pressure. They’re often used in systems that have frequent pressure spikes.

For technical drawings and 3-D models, click on a part number.

					Max. Horsepower
Setpoint, psi	Reset Point, psi	Approximate Difference Between Setpoint and Reset Point, psi	Max. Continuous Pressure, psi	Accuracy	AC (Single Phase)	AC (Three Phase)	DC	Wire Connection Type	Environmental Rating		Each
Switches with Manual On/Off Lever
1/2 NPSF Female Pipe Connection
20-65	5-45	20	65	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	__	Screw Terminals	NEMA 1	00000000	000000
25-80	5-60	20	80	±3%	2 hp @ 120 V AC 3 hp @ 240 V AC	3 hp @ 120 V AC 5 hp @ 240 V AC	1/2 hp @ 120 V DC 1/2 hp @ 240 V DC	Screw Terminals	NEMA 1	00000000	00000
Switches with Manual On/Off Lever and Low-Pressure Cutoff
1/2 NPSF Female Pipe Connection
20-65	5-45	20	65	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	1/4 hp @ 240 V AC 1/4 hp @ 120 V DC	Screw Terminals	NEMA 1	00000000	00000
Switches with Pressure Surge Protection
1/2 NPSF Female Pipe Connection
20-65	5-45	20	65	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	__	Screw Terminals	NEMA 1	00000000	00000

Multiport Pressure Switches for Air Compressors

With multiple ports, these switches maintain the air pressure of your electric air compressor, while also including ports for up to three air-powered devices, reducing the complexity of your air system setup. These switches turn off the compressor when it reaches the set pressure and on when the pressure drops to the reset point. They have an air exhaust valve, so when they shut off, they automatically release air between the compressor’s cylinder and check valve. This reduces stress on the motor to extend its life and makes for easier startups. All are NEMA rated to protect from dirt and stand up to some corrosion, but they shouldn’t be used outdoors. UL listed, CSA certified, and CE marked, they meet American, Canadian, and European safety standards.

Switches with a manual on/off lever let you turn off your system for maintenance or extended periods of time. When you flip the lever back on, the switch will automatically have the setpoint and reset point from its last use.

Use plugs (sold separately) in ports that are not in use. The NPT threads on the plugs are compatbile with the NPSC threads on the switch.

Switches

With Air Exhaust Valve

With Air Exhaust Valve and Manual On/Off Lever

					Max. Horsepower
Setpoint, psi	Reset Point, psi	Approximate Difference Between Setpoint and Reset Point, psi	Max. Continuous Pressure, psi	Accuracy	AC (Single Phase)	AC (Three Phase)	DC	Wire Connection Type	Environmental Rating		Each
Switches with Air Exhaust Valve
1/4 NPSC Pipe Connection
70 -150	40 - 120	30	150	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	1/4 hp @ 120 V DC 1/4 hp @ 240 V DC	Screw Terminals	NEMA 1	0000000	000000
100 -200	60 - 160	40	200	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	1/4 hp @ 120 V DC 1/4 hp @ 240 V DC	Screw Terminals	NEMA 1	0000000	00000
Switches with Air Exhaust Valve and Manual On/Off Lever
1/4 NPSC Pipe Connection
70 -150	40 - 120	30	150	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	1/4 hp @ 120 V DC 1/4 hp @ 240 V DC	Screw Terminals	NEMA 1	0000000	00000
100 -200	60 - 160	40	200	±3%	1 1/2 hp @ 120 V AC 2 hp @ 240 V AC	2 hp @ 120 V AC 3 hp @ 240 V AC	1/4 hp @ 120 V DC 1/4 hp @ 240 V DC	Screw Terminals	NEMA 1	0000000	00000

Plugs

Plug

Pipe Size	Connection		Each
1/4	NPT Male	00000000	00000