WNSseries gas-fired (oil-fired) hot water boiler

WNS series gas-fired (oil-fired) hot water boiler

gas-fired boiler

  • Working pressure:0.35-14 MW
  • Product thermal capacity:0.7-1.25 Mpa
  • Available fuel:Nature gas, coke oven gas, biogas, methanol, liquid propane gas, diesel, heavy oil, light oil, crude oil, etc.
  • Available industries:Heat supplying, hospital, hotel


WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.

Technical advantages

  1. The front and back smoke chamber plates are cut by CNC plasma cutting machine with tidy and beautiful look.
  2. The way to weld Smoke tube and tube sheet is to first expand to eliminate the gap between them, then adopt automatic argon arc welding to relief the stress and expand boiler service life.
  3. Fin tube uses ND steel or stainless-steel material to avoid corrosion in the low temperature.Inspection stops are set up to guarantee the sequence of expanding and welding to avoid cracking of the tube sheet holes.
  4. High quality aluminum silicate fiber is used with fire clay insulation, to control the boiler body temperature below 45℃ to control heat lost.
  5. Sufficient steam storage room and heating area to generate high quality steam and high thermal power.

Product parameters

ModelRated thermal power(MW)Rated working pressure(Mpa)Rated output water temperature(℃)Rated feeding water temperature(℃)
WNS0.7-0.7/95/70- Y(Q)0.70.79570
WNS1.4-0.7/95/70- Y(Q)1.40.79570
WNS2.1-0.7/95/70- Y(Q)2.10.79570
WNS2.8-0.7/95/70- Y(Q)2.80.79570
WNS3.5-0.7/95/70- Y(Q)3.50.79570
WNS4.2-1.0/115/70- Y(Q)4.21.011570
WNS5.6-1.0/115/70- Y(Q)5.61.011570
WNS7-1.0/115/70- Y(Q)71.011570
WNS10.5-1.0/115/70- Y(Q)10.51.011570
WNS14-1.0/115/70- Y(Q)141.011570


WNS series steam boiler

gas fired boiler

DZL series hot water boiler

coal fired boiler

SZL series steam boiler

biomass fired boiler