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

Hot water

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

WNS series horizontal internal combustion boiler is classic 3-pass wetback oil/gas fired boiler. After fuel is atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, called 1st pass; the high temperature flue gasses are collected in reversal chamber and then enter 2nd pass, which is grooved tube bundle area through heat convection, air temperature gradually falls and flows to front smoke box and enter 3rd pass, which is done in the smooth tube bundle area, and then through back smoke box lead to chimney and exhausted to the atmosphere.

Product thermal capacity: 0.7-14 MW

Working pressure: 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.

Our boiler products are applied in these enterprises.

Product Advantages


Higher thermal efficiency

Adopts the high-efficiency heat transfer component threaded smoke tube independently developed by ZOZEN to make the flue gas stay longer in the furnace, so as to improve the thermal efficiency

Good sealing performance, convenient for operation and maintenance

The front and back smoke chambers adopt the unique sealing structure; it also adopts a pair of axle sleeve type hinged doors

Product parameters

Model Rated thermal power(MW) Rated working pressure(Mpa) Rated output water temperature(℃) Rated feeding water temperature(℃) Maximum transport size(m)
WNS0.7-0.7/95/70- Y(Q) 0.7 0.7 95 70 3.3×1.8×2.1
WNS1.4-0.7/95/70- Y(Q) 1.4 0.7 95 70 4.4×2.1×2.5
WNS2.1-0.7/95/70- Y(Q) 2.1 0.7 95 70 4.6×2.3×2.7 
WNS2.8-0.7/95/70- Y(Q) 2.8 0.7 95 70 4.7×2.5×2.9
WNS3.5-0.7/95/70- Y(Q) 3.5 0.7 95 70 5.3×2.7×3.3
WNS4.2-1.0/115/70- Y(Q) 4.2 1.0 115 70 6.2×2.8×3.1
WNS5.6-1.0/115/70- Y(Q) 5.6 1.0 115 70 7.1×2.9×3.1
WNS7-1.0/115/70- Y(Q) 7 1.0 115 70 7.3×2.9×3.2
WNS10.5-1.0/115/70- Y(Q) 10.5 1.0 115 70 8.0×3.4×3.6
WNS14-1.0/115/70- Y(Q) 14 1.0 115 70 7.8×3.7×4.0

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Awards & Honors

certificate certificate

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Hot water/oil Steam