The Z-WNS series oil/gas-fired vacuum hot water boiler adopts the design principle of a water-tube boiler, featuring an SU304 stainless steel heat exchanger, high flue gas heat transfer coefficient, compact structure, and characteristics such as high efficiency and energy saving, ultra-low NOx emissions, and small size. The vacuum boiler operates under negative pressure and is equipped with multiple protection functions, ensuring safety and reliability, and guaranteeing it will never explode. It boasts a compact appearance, convenient installation, easy maintenance, and requires no inspection.
Vacuum hot water boilers operate on the principle of generating steam by boiling water at low pressure and low temperature, and then transferring heat through steam-water condensation heat exchange. The unit's interior is a sealed vacuum chamber. Combustion causes the heating medium, water, to boil and vaporize within the vacuum chamber, producing negative-pressure steam. This steam condenses outside the heat exchanger tubes, heating the cold water inside the tubes and supplying it to the user. The condensed steam forms water droplets that flow back to the heating medium water, where it is reheated and vaporized, completing the entire cycle.
Vacuum boilers operate under negative pressure and are equipped with multiple protection functions, ensuring safety and reliability, and preventing explosions. They utilize SU304 stainless steel tube heat exchangers, offering high heat transfer efficiency, low heat loss, and low exhaust gas temperature. Multiple heat exchangers allow for simultaneous heating of multiple points. The boilers are compact in appearance, easy to install, and convenient to maintain, requiring no inspection.
Features:
30mg Ultra-Low NOx Technology
Utilizing two core technologies—FGR (Flue Gas Recirculation) and group combustion—NOx emissions are below 30mg.
Negative Pressure Operation, No Inspection Required
Negative pressure operation ensures safety and reliability, eliminates the need for inspection, and allows for rooftop and basement placement. It is scale-free and has a long service life.
PLC Control System
A 10-inch color touchscreen paired with an intelligent programmable PLC controller enables fully automatic control.
Auxiliary Equipment from Renowned Brands
Designed for 5-10% overload capacity, using original imported burners and valve assemblies, ensuring stable operation and reliable quality.
Multi-Channel Heating
Equipped with multi-channel heat exchangers, enabling simultaneous heating from multiple channels.
Multiple Protection Functions
Negative pressure operation status detection/control function, low water level protection/over-temperature protection function, one-button start/stop/power-off self-locking function.
Industrial Packaging Design
Professional industrial packaging design, stainless steel outer casing, aesthetically pleasing and corrosion-resistant.
National Standard Manufacturer Materials
Uses materials from Anyang Iron and Steel and Tianjin Seamless Steel Pipe Factory to guarantee quality.
Parameters:
| Boiler Model | Rated Thermal Power (MW) | Rated Thermal Power (×10⁴ kcal/h) | Fuel Consumption (Natural Gas) (Nm³/h) | Fuel Consumption (Light Oil) (kg/h) | Maximum Transport Dimensions (mm) | Maximum Transport Weight (t) |
|---|---|---|---|---|---|---|
| Z-WNS0.35 | 0.35 | 30 | 36.2 | 32.5 | 2020×1100×1580 | 2 |
| Z-WNS0.7 | 0.7 | 60 | 72.7 | 65 | 2820×1240×1930 | 2.64 |
| Z-WNS1.05 | 1.05 | 90 | 108.9 | 96.9 | 2880×1590×2310 | 4.3 |
| Z-WNS1.4 | 1.4 | 120 | 144.8 | 125.9 | 3100×1460×2213 | 3.85 |
| Z-WNS2.1 | 2.1 | 180 | 189 | 226 | 3900×1720×2570 | 5.38 |
| Z-WNS2.8 | 2.8 | 240 | 290.8 | 258.6 | 4050×1870×2630 | 8 |
| Z-WNS3.5 | 3.5 | 300 | 363.6 | 326.8 | 4265×2140×2995 | 10.3 |
| Z-WNS4.2 | 4.2 | 360 | 436.2 | 388.3 | 6250×2934×3380 | 11.1 |
| Z-WNS5.6 | 5.6 | 480 | 581 | 513.7 | 7120×2632×3129 | 14.2 |
| Z-WNS7.0 | 7 | 600 | 720.2 | 639.8 | 7270×3136×3520 | 15.6 |
Notes:
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Fuel calorific value: Heavy oil 10000 kcal/kg, Light diesel oil 10240 kcal/kg, Natural gas 9140 kcal/Nm³, LPG 24000 kcal/Nm³, City gas 3800 kcal/Nm³; when the fuel calorific value and chemical composition change, some parameters in the table will vary accordingly.
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Boiler pressure/outlet water temperature can be designed separately according to user requirements.
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Due to continuous technological innovation and improvement, technical parameters are subject to change without prior notice.