High-pressure washer HD 9/20-4 S ST Classic

As robust as it is powerful: the HD 9/20-4 S St Classic stationary cold water high-pressure cleaner for tough cleaning applications. Assembly, operation and maintenance that is so effortless, it's child's play.

The HD 9/20-4 S St Classic cold water high-pressure cleaner designed for consistent, long-lasting and ultra-reliable operation even under the toughest working conditions. To fulfil its remit, the solidly built stationary machine is fitted with a strong, easy-to-adjust crankshaft pump with a high-quality brass cylinder head and a low-speed 4-pole motor with automatic shutoff and air/water cooling. While the pump is well-protected by a built-in and easy-to-clean water filter, the other standard equipment speaks for itself – with trigger gun, lance, 10-meter high pressure hose and a power nozzle all included in the scope of supply. For added speed and convenience, these all come with our innovative EASY!Lock quick-release couplings. For the very best cleaning performance, the machine's 7 kW motor output produces up to 200 bar of working pressure, which in turn delivers an hourly flow rate of 900 litres. And it doesn't end there; service and maintenance tasks on the HD 9/20-4 S St Classic can be completed just as quickly as installing its ultra-sturdy steel frame to the wall or floor.

Features and benefits

Powerful and robust crankshaft pump with brass cylinder head and pistons with ceramic sleeves

High performance and high efficiency. Long service life and low maintenance costs. With suction feature and up to 60 °C water temperature.

Robust, stationary chassis

A robust tubular steel frame reliably protects the machine against damage. Long-lasting, robust and thus very economical machine. The sturdy pipe frame provides protection in continuous heavy-duty use.

Classic accessories with EASY!Lock connections

Robust and durable accessories. Quick set-up and pack-up plus easy accessory replacement. Easy to use

Clear machine design

Large water filter to protect the pump.
Pressure and water volume can be adjusted on the pump itself.
Filling level and quality of the oil can be checked easily using the inspection glass and dipstick.

4-pole low-speed motor with air-water cooling system, robust pump with stainless steel pistons and brass cylinder head

Combines efficient water cooling with a robust air cooling system for maximum cooling output even in fluctuating ambient temperatures and water temperatures.
Built to last, high reliability.
Tried-and-tested high-quality Kärcher components guarantee a long lifetime.

Intuitive operation and simple maintenance

Integrated water filter can be removed and cleaned without any tools.
Simple operation.
Good accessibility for easy service and maintenance.

High flexibility

The extensive accessory line provides for ergonomic and economical cleaning solutions for numerous applications.
Extensive range of accessories for a wide range of applications.
Minimum installation effort.

Specifications

Technical data

Supply voltage (Ph/V/Hz)	3 / 376 - 424 / 50
Flow rate (l/h)	450 - 900
Inlet temperature (°C)	60
Working pressure (bar)	50 - 200
Max. pressure (bar)	260
Connected load (kW)	7
Power cable (m)	5
Nozzle size	047
Water inlet	1″
Colour	anthracite
Weight (with accessories) (kg)	49,7
Weight incl. packaging (kg)	55,4
Dimensions (L x W x H) (mm)	720 x 522 x 418