A wide range of high quality controllers for various power applications

SmartGen HWP40N Engine Heater, Suitable for various engine with (15~30)L displacement

* All prices on this website are retail in USD on EXW incoterms


Technical Parameters:
Rated Power  4000W
Rated Current  16.7A
Engine Displacement(L)  20~30
Thermostat Range  Off: (5~70)ºC On: (0~65)ºC
Electrical Strength  AC 1.5kV 1min
Insulating Resistance  ≥50MΩ
Inlet/Outlet Size  G 3/4 Internal thread (Selectable Ф19.5mm Pagoda header or G 3/4 External thread)
Max. Water Pressure  0.5MPa
Protection Level  IP44
Vibration Resistance  (5~8)Hz Amplitude±7.5mm Triaxial (8~500)Hz a=2g Triaxial
Shock Resistance  Half-sine Wave; apeak=50g; Triaxial
Case Dimensions(mm)  414*261*190
Weight(kg)  5.3(include accessories)

Product Overview:
HWP40N is a smart forced circulation heater of engine water. When engine operation temperature is below 4ºC, engine liquid coolant/lubricating oil may be coagulated to solid state in starting phase and lose lubrication or cooling effects, so that it may damage the engine. Therefore, heater shall be installed for engine to ensure normal starting and running.

It has lamp indication function, which can indicate all kinds of heater statuses. Heating temperature can be set by users, and dry burning prevention and overheating protection are fitted.

This product is suitable for various engines with (15~30)L displacement.


Micro-processor design is applied for the control part, precise temperature sampling, heating temperature can be set from control panel.

4-bit digital cube display is applied, which can show current coolant temperature, user defined temperature, accumulated running time, accumulated energy consumption, current voltage parameters etc.

Water flow sensor is fitted, which can quickly detect shortage of water, pipe gas gathering, pipe clog, in order to prevent heater from dry burning, gas gathering etc. unhealthy phenomenon.

Circulation pump and heater are controlled separately; water pump is firstly connected before heating, and then heater starts after delay for 5s; when it reaches pre-set temperature point, heater power is disconnected firstly; then water pump power is cut off after delay for 60s; this is to prevent heat gathering so that it can prolong pump life.

Manual test function is fitted, which can check whether heating body and water pump is able to operate normally through panel button.

Fine cast aluminum material is used for heater shell.

Stainless steel inner heating pipes.  

Water drain valve is fitted at the bottom of the heating body, which can be used on demand.

This product can work normally at -40℃ temperature.

Why SmartGen?

  • More than 200,000 units yearly
  •  19 years of successful business
  • More than 50 offices worldwide
  • Almost 200 technology patents
  • ISO, GM and CCSR certificates
  • High quality and low prices
  •  Wide variety of generator parts


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