DYNAJET 300mdh expert


DYNAJET 300mdh expert

Compact, powerful and versatile - welcome to the new mdh-class of hot- and cold-water high-pressure cleaners from DYNAJET! The 300mdh expert is designed for installations in vans, trailers or pick-up trucks. It comes with an installation kit for an external water tank, e.g. an IBC-container, for independent supply of water.



  • Highest CE-certified safety standards
  • Robust, powder-coated steel frame for optimum machine protection and a long service life
  • Screws made of corrosion-free material for high durability
  • Crane eye for easy transport even to places that are difficult to reach
  • Splash-resistant (IP54) electricals box for versatile and problem-free deployment


  • Operating-hours counter for optimum product costing analyses
  • Industrial motor complying with the latest exhaust gas standards for a long service life and low running costs
  • Belt drive for quiet operation and extended maintenance intervals
  • Oil-pressure monitoring to protect against motor damage
  • Flexible vibration elements to absorb vibration between the motor, pump and frame
  • Vibration-proof starter battery for effortless start-up

Water supply:

  • Cleanable stainless-steel water filter for maximum service life of the pump
  • Water-tank low-level monitor to protect the high-pressure pump from running dry
  • Low-speed, easy-maintenance 3-plunger pump for maximum service life and low wear costs
  • Patented burner control without solenoid valves for safe and efficient, as well as instant-stop, operation
  • Stepless pressure adjustment for optimum, application-orientated regulation of pressure and flow rate, as well as minimized noise levels, diesel consumption and wear
  • Safety valve for additional safety during operation
  • Large-sized bypass hose to prevent pressure peaks and temperature increases
  • Always ready for operation, even in winter, due to frost protection system




Technical data

Base data
System Hot- and cold-water high-pressure cleaners
Type Skid
Pressure class 300 bar (4,350 PSI)
Pressure variable Yes
Minimal pressure 100 bar (1,450 PSI)
Minimum flow rate 7 l/min (1.85 USgal/min)
Maximum flow rate 19 l/min (5.03 USgal/min)
Pump revolution speed Missing: max-1300-upm
Hydraulic power 10 kW (14 Hp)
Pump Ceramic triplex plunger
Temperature Max. 95 °C
Threaded connection
Input port GEKA
Output port M22x1.5 ET
Drive type Diesel motor
Motor power 13 kW (18 Hp)
Motor speed Max. 3000 rpm
Motor type Kubota 3-cylinder diesel motor (water-cooled)
Power transmission from motor to pump Belts
Fuel consumption 3.9 l/h (1.03 USgal/h) (average)
Volume fuel tank Approx. 70 l (18.50 USgal)
Medium Clear water, up to 40 °C (104 °F), min. 1.8 bar (26 PSI) to max. 6 bar (90 PSI) supply pressure
Weight in kg 420.0
Dimensions (L/W/H) 120 x 80 x 112 cm
Heating power oil burner/Dynabox Max. 115 kW (159 Hp)
Article number 1546715W

Scope of delivery (Standard version and standard accessories)

Standard scope of supply

lifting eye, powerful diesel engine, hand-throttle control, operating-hours meter, stainless-steel water filter, assembly-kit for connection of an external water tank, level sensor to protect the machine from running dry, crankshaft pump, high-pressure gauge, safety valve, hot-water system, frost protection function, operating manual

Scope of supply

10 m high-pressure hose for hot/cold-water, high-pressure cleaning gun with extension pipe (total length approx. 800 mm), nozzle carrier and 15° flat-jet nozzle

Service and sales

We'll be happy to help you - just give us a call or write us an E-mail:

Tel: +49-7022-304-1130

You have questions about a product, require a quotation or a product demonstration, or are looking for a rental location? Simply select the relevant subject in our contact form and we’ll look into your query as soon as possible.

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