Introduction

Vacuum Hot Water Boiler

Vacuum hot water boiler, adopts principle of water-fire tube boiler, SU304S stainless steel heat exchanger, high heat transfer efficiency of flue gas, compact structure, high efficiency and energy saving, ultra low NOx emission and small volume. The vacuum boiler operates under negative pressure and has multiple protection functions, It is safe and reliable and never explodes. It has exquisite appearance, convenient installation, convenient maintenance and no need for supervision.
Core Technology:
1. Automatic packaged boiler, Independently research and develop PLC control system, intelligent matching, rich functions, safe and convenient. Automatic control of boiler water level, over-high,over-low water level and over-pressure alarm function, adding the fifth water level protection.
2. High efficiency up to 99.8% and energy saving, three pass structure extend the flow of smoke and enhance the heat transfer; Big size corrugated furnace area for heating, improve the boiler effiency; Whole adopt corrugated tubes, strengthening heat transfer and eliminating welding stress.
3. 100% safety, Whole wet back structure and transition multi-loop full-temperature condenser design, ND steel material, fin tube design, which highly reduces the back plate sheet temperature(around 50°C); Flame-out protection, power failure self-locking protection function; Two water level gauges and two Spring Safety Valve, Backup protection.
4. Innovative design , Boiler operation data query and automatic fault identification function, data collection, analysis, storage and remote monitoring of the Internet.
> How to Choose A Suitable Boiler
1. Basic Boiler Information For Your Project
Fuel options: Gas Lpg Diesel Heavy-oil Biogas Dual-fuel, Electricity, Coal, Charcoal, Wood, Biomass, Pellets, EFB Palm-kernel-shells, Rice-husk, Peanut-shells, Cashew-nuts-shells, Sunflower-seeds-shells, Bagasse, etc.
Thermal capacities options: 100kg-50000kg, 70kw-35000kw, 5hp/bhp-3000hp/bhp, (million-btu, pounds/lbs, liters,etc)
Heat medium options: saturated/superheated steam, hot water, thermal oil.
Structure options: Fire tube boiler, water tube boiler, water-tube fire-tube boiler
Layout options: Vertical boiler, Horizontal boiler.
Operating-mode options: Automatic, manual
Note: please feel free to send all requirements, we could help you better.
2. Calculating Running Cost
Specific consumption analysis report
Different types boiler running consumption comparison analysis report
(Note: Report is based on your local energy source price)
3. Boiler Accessories (essential or optional)
Control panel, Water treatment device, Economizer, Conderser, Heat recovery unit, Deaerator, Solid fuel burning combustions stoker (chain-grate, reciprocating-grate, travelling-grate, fixed-grate), Steam header, Pumps, Water level gauge/sensor, Pressure guage/sensor, Safety valves, etc.
Note: Any special request, please send all details.
Boiler Features

100% Safety
We make the ultrasonic flaw detection and water pressure test for body body and pressurized part. Boiler equipped with double gauges & safety valves
High Automation Boiler
Intelligient control panel of boiler, it controls the size of the flame of the burner, water level, pressure, temperature and other signals inside the boiler
Energy-Saving Boiler
Three pass boiler, three pass can extend the flue gas distance, enhance heat transfer and increase thermal efficiency. Full heat insulation condenser design
Environmental Friendly
WNS series boiler, it could satisfy all countries' environment NOx emission limit standard. We are on the way to green environment protectionTechnical Parameter

| Model | Rated power(MW) | Rated pressure (Mpa) | Rated output temperature(℃) | Rated return water temperature(℃) | Thermal efficiency(%) | Exhaust temperation(℃) | Fuel comsumption | max transportation weigh(t) | |
| light diesel oil(kg/h) | natural gas(Nm³/h) | ||||||||
| ZWNS0.35 | 0.35 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 31.6 | 36.6 | 2.65 |
| ZWNS0.7 | 0.7 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 60.4 | 69.3 | 4.66 |
| ZWNS1.4 | 1.4 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 122.8 | 146.1 | 6.53 |
| ZWNS2.1 | 2.1 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 192.3 | 227.1 | 7.3 |
| ZWNS2.8 | 2.8 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 246.1 | 286.5 | 8.1 |
| ZWNS4.2 | 4.2 | 0.7/1.0/1.25 | 95/115/130 | 70 | >97 | 60-75 | 367.1 | 412.6 | 15.1 |
| ZWNS5.6 | 5.6 | 0.7/1.0/1.25/1.6 | 95/115/130 | 70 | >97 | 60-75 | 490.2 | 543.7 | 18.2 |
| ZWNS7.0 | 7.0 | 0.7/1.0/1.25/1.6 | 95/115/130 | 70 | >97 | 60-75 | 593.6 | 660.7 | 25.6 |
| ZWNS10.5 | 10.5 | 0.7/1.0/1.25/1.6 | 95/115/130 | 70 | >97 | 60-75 | 936.5 | 998.8 | 29.1 |
| ZWNS14.0 | 14.0 | 0.7/1.0/1.25/1.6 | 95/115/130 | 70 | >97 | 60-75 | 1200.8 | 1330.7 | 47.8 |
| Note: Parameter is for reference only, if any changes should follow the factory technical data. | |||||||||
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About us

Yuanda Products
steam boiler, steam generator, hot water boiler, thermal oil heater boiler, hot air furnace, waste incinerator.
Various Structure
vertical, horizontal, fire tube boiler, water tube boiler, coils heater boiler, water membrane wall structure, sing drum, double drum...
Application
widely in all industries productions heating drying process, building central heating system, electricity generation.
About us
Yuanda Boiler Company established in 1956, qualified by ISO, CE, ASME, EAC, DOSH, and CRN, ensuring safety, reliability, and quality.
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