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Technical advice


précautions 341 x 300

échauffement 341 X 300 différents types de transmissions pompe radiale axiale


    Précautions 1366 x 300

Real flow rate of the water network

To get a flow rate of 20 l/min, i.e. 1 200 l/h, your water network flow rate needs to be 20 to 30 % higher than 20 l/mn.

Diameter of the water inlet hose (low pressure) : 

                                                réseau d'eau

Usable amperage of the electric network : ground fault circuit interrupter

Tableau ampérage

Use of an extension cable : always completely uncoil the cable

For 13 usable amperes :

For 16 usable amperes :

For 20 usable amperes :

For 23-25 usable amperes :

2,5 mm2 max. 35 metres

4 mm2 max. 35 metres

4 mm2 max. 25 metres

 6 mm2 max. 35 metres

  < 4 mm2

  < 6 mm2

  < 6 mm2

 < 10 mm2

Temperature of the HP washer according to its use

After releasing the trigger of the HP washer, the water temperature increases quickly, which can lead to overheating of the pump

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échauffement 1366 x 300

Never leave the HP washer work in closed circuit during more than 2 minutes.

Various solutions to avoid overheating :

Return to buffer tank

After releasing the trigger of the HP spray gun, the regulator sends the water back in the buffer tank.

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Total stop (Automatic Start/Stop)

After releasing the trigger of the HP spray gun, the engine stops.

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Time delayed automatic Start/Stop

After releasing the trigger of the spray gun, the engine continues to work during the time set, then stops. This avoids too many starts.

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différents types de transmissions

On combustion engines 

ESSENCE.jpg       DIESEL.jpg

DIRECTE%20THERMIQUE%20ROUGE.jpg Transmission_directe_sur_thermique_d_tou
  • Standard series
  • Pump rotation speed : 3 400 rpm
  • Direct assembly between
  • Engine and pump : same rotation speed
REDUCTEE%20ROUGE.jpg Transmission_r_duct_e_d_tour_e_300_dpi.p
  • Industrial series
  • Pump rotation speed : 1 450 rpm
  • Reduced pump rotation speed
  • Increased longevity
POULIES%20COURROIES%20ROUGE.jpg Transmission_poulies_courroies_d_tour__3
  • Industrial series
  • Pump rotation speed : 950, 1 000 or 1 450 rpm
  • Ideal assembly, more elastic torque between engine and pump
  • Increased longevity

On electric engines 

picto 230 v     picto 400 v

  • Standard series
  • Pump rotation speed : 1 450 rpm
  • Bearings on the pump and on the electric engine
  • Industrial series
  • Pump rotation speed : 1 000 ou 1 450 rpm
  • 4 bearings
  • The flector avoids torque and torsion effects on start as well as heat exchange between engine and pump.

pompe radiale ou axiale


It works on the principle of the internal combustion engine with a crankshaft, connecting rods and pistons (2, 3 or 6), in an oil sump : a simple tried and tested concept, easy to maintain (first oil change after 50 hours, then every 250 hours) and repair (all parts are fully accessible).
The quality of the pumps depends of the quality of the materials used.

PAGE_13_COUPE_POMPE_RADIALE_BERTOLINI_BL 1. «White bronze» reinforced connecting rods.

2. Suction and discharge valves known for their silence. Seat, valve and spring made of stainless steel.

3. Long life seal preventing extrusion hazards.

4. Stainless steel  piston locking screw.

5. Exclusive sealing pack constantly lubricated, avoiding leaks. Very easily replaceable.

6. Extremely hard solid ceramic pistons. Perfect polishing ensures an exceptional longevity to seals.

7. Teflon, graphite and bronze covering to guide the pistons.

8. Oversized tapered roller bearings.

AXIAL pump

The axial pump is coupled along the axis of the engine shaft. A rotating plate mounted crosswise on a shaft applies progressive thrust  on each piston, returned by a spring Pompe%20axiale.jpg

Dimaco favors use of the radial pump on its HP washers for :

• Comfort of the user (less vibrations),
• Easier maintenance of the radial pump,
• Longer lifetime of the radial pump.

Disassembly and reassembly of the axial pump are not easy, maintenance and repair have to be carried out by professionals having a perfect knowledge of this technology.