Suttner Electrical Part

Equipment Type Pressure Washer
The ST-5 is a "normally open" flow switch, designed to be mounted in a high pressure water line. Inside the housing is a floating magnet which is aligned parallel with a reed switch. When the water flow is initiated, ususally by pulling the spray gun trigger, the water flow forces the magnet to move forward. Once in the correct position, the magnet pulls the thin reeds together, closing the circuit and allowing electrical continuity. When water flow ceases, usually when the trigger is released, gravity returns the magnet to its original position. the reeds then pull apart and open the circuit, stopping electrical continuity.
Mounts further downstream in pumping system than traditional vacuum switches, therby minimizing potential leak points that can cause vacuum switches to close.
Vacuum switches use rubber diaphragms that often rupture and cause vacuum leaks to the pump
Flow switches operate at a variety of pressures
Flow switches eliminate the need to restrict water flow to the pump, thereby prolonging pump life
the reed switch is encased in a protective glass capsule with a sealed nitrogen atmosphere that eliminates exposure to corrosive cleaning chemicals
Mounting Position: Vertical only
Magnet Configuration: Free floting
PSI 75-3600 PSI
Gallons Per Minute 1-8
Inlet 3/8" FPT
Outlet 3/8" FPT
Cord/Lead Length: 47 inches
Weight 16oz
WIRING INSTRUCTIONS: Lead #1 to Line/Power, Lead #2 to Load Yellow with green tracer to Ground
Reed Switch Adjustment: depending on the system flow, it is normal for the magnet position to vary. This variance may require adjustment of the reed switch upon initial installation, especially at lower flow rates. If the switch fails to close upon initial flow, simply loosen the adjustment screw and position switch so it properly opens/closes according to flow conditions.

Equipment Type Pressure Washer
PSI 75 to 5000
Temperature 176°F
Volt 250 Volts
3.0 amps
Inlet 3/8" FPT
Outlet 3/8" FPT
Cord Length: 47"
Weight 1 lbs
Mounts in any position with a free floating magnet configuration. Water flow activated switch to control the burner on and off. Although the most popular application is high pressure washing, the flow switch is suitable for other applications including carpet cleaning equipment, steam boiler and other types of pumping systems.