ST-7 Flow Switch (3/8" Female) – Pressure Washer Flow Control
Ensure the flawless, automated operation and maximum safety of your industrial high-pressure pumping systems with the highly advanced ST-7 Flow Switch (3/8" Female). In heavy-duty commercial pressure washers, relying on basic pressure switches can lead to erratic pump pulsing and severe mechanical stress when using long hoses or chemical injectors. This premium flow control switch operates purely on water movement rather than built-up pressure. When you pull the trigger gun, the water flow physically activates the switch, instantly turning the massive electrical motor on. When you release the trigger, the flow stops, and the switch instantly shuts the motor down, preventing the pump from dead-heading and overheating.
Engineered for extreme industrial environments, the newly developed ST-7 entirely replaces fragile, traditional REED-contacts with a formidable, heavy-duty industrial micro switch. This massive upgrade delivers a significantly higher electrical output capacity and a vastly extended operational lifespan. Crucially, the internal hydraulic water chamber and the electrical components are completely separated, guaranteeing maximum operator safety against water ingress and short circuits. Featuring a highly sensitive, low switch-on point of just 1.5 L/min and creating a minimal pressure drop (only 1.5 bar at 30 L/min), this essential pressure washer part is the ultimate upgrade for custom extraction rigs and heavy-duty wash bays.
Who Is The ST-7 Flow Switch Ideal For?
The ST-7 delivers industrial micro-switch reliability and completely separated hydraulics. It is highly recommended for:
-
Commercial Wash Bays & Detailers: Upgrading their static pressure washing systems with a highly reliable flow control switch to ensure the heavy-duty pump instantly shuts down when the gun is closed, saving electricity and pump seals.
-
Appliance Repair Technicians: Sourcing elite, highly durable pressure washer parts to replace failing, erratic pressure-switches in clients' industrial hot water extractors, eliminating frustrating machine 'pulsing'.
-
Custom Rig Builders: Integrating a highly sensitive, low-activation flow switch into custom-built, van-mounted carpet extraction or high-pressure jetting systems.
-
Industrial Facility Managers: Ensuring maximum electrical safety in wet wash-down environments by utilizing a switch where the 240V electrics are completely isolated from the high-pressure water block.
Key Features and Performance Benefits:
-
Industrial-Grade Micro Switch: Completely abandons fragile glass REED switches. The heavy-duty mechanical micro switch handles significantly higher electrical loads, drastically extending the lifespan of the unit under constant, repetitive use.
-
Separated Hydraulic/Electric Design: A massive safety feature. The high-pressure water chamber is physically isolated from the 240V electrical switch box, completely eliminating the risk of water ingress causing a catastrophic electrical short.
-
Highly Sensitive Activation: Features an incredibly low switch-on point of just 1.5 L/min. This means even if you are using tiny nozzles or low-flow chemical injectors, the switch will accurately detect the flow and turn the motor on.
-
Minimal Pressure Drop: The internal bore is highly streamlined. Even when pushing a massive 30 Litres per minute through the block, it only causes a tiny 1.5 bar pressure drop, ensuring you maintain maximum blasting power at the nozzle.
-
Standard 3/8" Fitment: Equipped with standard 3/8-inch Female threaded ports on both ends, making it incredibly easy for technicians to plumb directly into existing commercial high-pressure lines.
Technical Specifications & Compatibility:
-
Model: ST-7 Flow Switch
-
Product Type: High-Pressure Flow Control Switch
-
Connections: 3/8" Female Threads (Inlet & Outlet)
-
Switch-On Point: 1.5 L/min
-
Switch-Off Point: 0.8 L/min
-
Max Water Flow: 30 L/min
-
Pressure Drop: 1.5 bar at maximum flow
-
Application: Industrial pressure washers and high-pressure fluid management systems.
