4 Port 25 Amp 105-135 PSI Heavy Duty Amp Pressure Switch
Brand new heavy duty, 25 Amp Sunny 105-135 PSI air compressor, pressure switch, control valve with a 4 port connection manifold. The switch listed is a universal replacement pressure switch that replaces brands such as Furnas , Square-D and more. This switch is equipped with an unloader valve, a On / Off switch, and a four port mounting manifold. This is similar to the regular 4 port pressure switch, but this switch is equipped with heavy duty 25 Amp contacts to provide a longer lasting switch in demanding applications.
The four port manifold gives you the option to mount in it any direction and to also have the option to add a relief valve, gauge, or multiple air outlet ports. These Ports can also be plugged if not needed which is what makes this switch a great universal replacement pressure switch. The unloader equipped on this switch is used to unload the air pressure off the head of the compressor when the compressor shuts off, this way when it starts there is no pressure on the piston and the compressor is able to start load free. This valve usually has a 1/4" plastic or copper line that runs to the check valve or the head of the compressor. If your compressor does not have a unloader line then this valve can be left not hooked up and the pressure switch will still function properly.
This switch can be used on a single stage or two stage compressor as long as the amperage is less than 25 amps on volt 115-230 on a single phase or on a three phase 230-575 volt, however if this is being used with a magnetic starter on a larger compressor the amperage does not matter, in this case it is just used to turn the starter on & off at the set pressure. This switch comes pre set to turn the compressor on at 105 PSI and shut off at 135 PSI. This can be adjusted to any pressure within the factory minimum and maximum set points listed below. We have a picture showing the diagram for pressure adjustment.
-PRESET 105-135 PSI
-MINIMUM ON: 60 PSI
-MAXIMUM OFF PRESSURE: 200 PSI
-PRESSURE DIFFERENTIAL: 28-40 PSI
-¼" COMPRESSION UNLOADER VALVE CONNECTION
-¼" FEMALE NPT TANK CONNECTION WITH 3 EXTRA 1/4" FEMALE NTP PORTS.
-MAX AMPS, 25 AMPS AT 115-230 VOLT / 25 AMP AT 230-575 VOLT
No Power Switch
4-3/4" Long (Farthest Point)
2-5/8" Wide (Farthest Point)
3-3/4" (Bottom of Manifold to Top of Lid)