Nilfisk MH 4M - Professional Hot Water Pressure Washer - Three-phase - 250 bar - 880 L/h

The MH40M-190/940 PA 400/3/50 EU is a hot water pressure washer designed to ensure high operational efficiency even under the most demanding working conditions. Part of the MH Standard range, it stands out for its reliable and consistent performance, and greatly helps to reduce running costs, machine downtime and CO₂ emissions by up to 80% thanks to its compatibility with biofuels.

The core of the system is the high-efficiency boiler compatible with biodiesel, a central element of MH technology, which delivers high thermal performance while maintaining a more sustainable approach.

From a technical perspective, the model is designed for professional use with a 400V three-phase power supply (400/3/50) and a power consumption of 8.6 kW. The pump delivers a maximum pressure of 190 bar with a cleaning force of 5.2 kg of thrust, ensuring effective action even on the most stubborn dirt. The water flow rate reaches 880 L/h, while the maximum water temperature reaches 90°C, supported by a heating capacity of 66 kW.

The system has a low fuel consumption of 4.1 Kg/h (ΔT 45°C), powered by a 15-litre tank, with the option to use either diesel or biodiesel. The machine accepts inlet water up to 40°C, with a minimum required pressure of 1 bar.

In terms of noise levels, the operating noise level is 77 dB, with an overall sound level of 95 dB, making it suitable even for professional environments.

The technical specifications are completed by a 16A circuit fuse (C16) and a design focused on reliability, operational continuity and reduced environmental impact, making this pressure washer a practical solution for intensive professional use.

Why choose a hot water pressure washer? A hot water pressure washer is necessary when dealing with greasy or particularly stubborn dirt as quickly as possible. The cleaning efficiency of hot water is significantly higher than cold water (up to 50% more effective on certain types of residues), as the heat helps to dissolve dirt. Additionally, the effect of the heat on the surface allows for faster drying. Using a hot water pressure washer means: reduced cleaning times (for the same level of dirt), better removal of non-water-soluble dirt, faster drying times and lower detergent consumption - in short, lower overall cleaning costs.

THE BURNER CONTROL THERMOSTAT: allows you to adjust the water outlet temperature

Using a knob on the dashboard, you can select the detergent suction pressure from the two tanks ( 10l each)

Pump oil level warning system

Large boiler drain made of stainless steel.

Equipped with the innovative Delayed Total Stop system, which stops the machine when the trigger on the gun is released, allowing for even greater energy savings and maximum power upon restart compared to the traditional Total Stop system.

Low-pressure detergent suction: the chemical is dispensed (without passing through the pump, but sucked in via a Venturi system) by reducing the machine’s operating pressure. This allows the product to be distributed as a wide conical spray onto surfaces close to the operator.

MOTOR: three-phase electric (400 V) 8.6 kW

• Diesel tank (30 l)
• Max. inlet temperature 40°C
• Cleaning impact 5.2 kg of thrust

The MH40M-190/940 PA pump is designed to guarantee high performance and operational continuity even in intensive professional settings. The system operates at a maximum pressure of 190 bar, ensuring high dirt removal capacity, supported by a cleaning impact of 5.2 kg of thrust, which clearly shows the jet’s effectiveness.

The water flow rate reaches 880 L/h, a figure that allows for a combination of power and volume for rapid and efficient cleaning of large surfaces. This configuration makes the pump suitable for both heavy-duty applications and continuous use.

The pump is powered by a 400V three-phase system (400/3/50), which guarantees greater stability, consistent performance and less stress on components compared to single-phase solutions. Power consumption stands at 8.6 kW, in line with high-performance professional-grade machines.

For correct operation, a minimum inlet water pressure of 1 bar is required, with a maximum allowed temperature of 40°C: these parameters ensure the protective and long-term durability of the pump itself.

Overall, the pump is a key component of the machine, designed to offer reliability, power and consistent performance even under the most demanding working conditions.

• Model: MH40M-190/940 PA 400/3/50 EU
• Type: professional hot water pressure washer
• Power supply: three-phase 400V / 50 Hz
• Maximum pressure: 190 bar
• Cleaning impact: 5.2 kg of thrust
• Maximum flow rate: 880 L/h
• Maximum water temperature: 90°C
• Heating capacity: 66 kW
• Power consumption: 8.6 kW
• Fuel type: diesel / biodiesel
• Biofuel compatibility: CO₂ emissions reduced by up to 80%
• Fuel consumption (ΔT 45°C): 4.1 Kg/h
• Fuel tank capacity: 15 L
• Maximum inlet water temperature: 40°C
• Minimum inlet water pressure: 1 bar
• Noise level: 77 dB
• Sound level: 95 dB
• Motor: 1450 rpm
• Automatic start/stop: yes
• Fuel level indicator: yes
• Boiler: compatible with biofuels
• Water break tank: yes
• Exhaust gas temperature sensor: yes
• Nozzle holder: yes
• Lance holder: double (2 lance holders)
• Hose reel with swivel hook: included
• Storage compartment: included
• Lance and gun storage: integrated
• Transport: can be moved using a forklift
• Circuit fuse: C16 (16A)