2025 High-Efficiency Hot Air Boiler for Efficient Air Circulation

• Customization: Available
• Function: Water Boiler, Steam Boilers, Hot Water Boiler
• Fuel: Oil-Fired
• Model NO.: ZKW series
• Installation: Bulk Boiler
• Structure: Fire Tube
• Media: Hot Water
• Water Circulation: Forced Circulation
• Drum Placement: Horizontal Boiler
• Pressure: Pressure
• Manufacturing Level: B
• Burning Style: Chamber Combustion Boiler
• Usage: Industrial, Power Station
• Wooden Packaging: 1
• Delivery Time: 30 Days
• Free Samples: No
• Feature: Customized
• Transport Package: Wooden Packaging
• Specification: Customized
• Trademark: Weifu
• Origin: Jiangsu

Product Description

Product Description

One machine for multiple purposes: Thanks to its innovative design and unique structure, our vacuum boiler boasts dual hot water outputs, offering hot water with different temperature gradients simultaneously. Utilize either a dual-circuit system or a single-circuit system for independent operation, perfect for versatility in any setting.
High thermal efficiency: Experience superior thermal efficiency with our heat exchanger operating within a fully enclosed vacuum chamber. Crafted from premium imported stainless steel, it ensures outstanding heat transfer efficiency, significantly boosting energy savings and cutting costs.
Absolute safety: With an always-negative pressure state, our boiler eliminates explosion risks. Equipped with advanced safety features including temperature sensors, safety valves, overheat protection, and vacuum control switches, it thoroughly addresses and mitigates all potential safety concerns.

Intelligent control: Our state-of-the-art digital control system, showcased on an intuitive LCD screen with Chinese display, offers unparalleled convenience. Easily set temperatures, view real-time furnace and vacuum parameters, and automatically log combustion times and faults. Simplified operation that requires no manual handling.
Eliminate the trouble of registration procedures: Delivered fully assembled and operating under negative pressure, our boiler bypasses the risk of expansion or explosion, exempting you from cumbersome registration procedures. This not only simplifies installation but also significantly reduces your operational costs.

Energy saving: Utilizing minimal heat medium water within a negative pressure vacuum chamber, our system achieves efficient heat exchange, delivering warm water at set temperatures in under ten minutes without preheating losses, resulting in remarkable energy savings.
Long life: Constructed with the finest stainless steel for optimal heat transfer and corrosion resistance, our heat exchanger promises longevity. Flange connections simplify maintenance, while the vacuum state of the body prevents corrosion and scaling, thereby extending the service life of the components significantly.
Insulation structure: Featuring a robust 100mm double-layer insulation structure, our design minimizes external surface temperature to match ambient room levels, enhancing both safety and thermal efficiency to new heights.
Imported low-nitrogen burner: Our low-nitrogen burner promises high-efficiency combustion with minimal noise and reduced emissions, fully compliant with the stringent standards of the nation's premier regions.

Gas Vacuum Hot Water Boiler (120mg) Parameter Table
Modal		Unit	ZKW0.35-65/55-Q.Y	ZKW0.47-65/55-Q.Y	ZKW0.58-65/55-Q.Y	ZKW0.7-65/55-Q.Y	ZKW0.94-65/55-Q.Y	ZKW1.05-65/55-Q.Y	ZKW1.2-65/55-Q.Y
Rated thermal power		KW	350	480	580	700	940	1050	1200
Rated heat output		Kcal/h	300,000	400,000	500,000	600,000	800,000	900,000	1,000,000
Boiler design thermal efficiency		%	94~96
Rated working pressure		Mpa	-0.085
Heat exchanger working pressure		Mpa	1.25
Rated heating supply t=10	Outlet/return water temperature	ºC	65/55
	Circulating water volume	t/h	30	40	50	60	80	90	100
	Water supply and return diameter	DN	65	80	80	100	125	125	125
Fuel consumption	0# Light diesel	kg/h	32.5	53.7	53.7	64.5	85.6	95.6	154.5
	Natural gas	Nm³/h	38.4	64.5	64.5	77.1	102.7	114.5	129.5
Flue size		mm	φ250	350*220	350*220	φ320	φ330	φ350	φ412
Shipping Weight		KG	2600	3000	3000	3300	4500	4200	4500
Dimensions	Length	mm	2620	3000	3000	3200	3640	3700	3650
	Width	mm	1350	1600	1600	1470	1770	1840	1860
	Height	mm	2040	2000	2000	2220	2250	2160	2250

Statistics by boiler flue in 2024

	Modal		Unit	ZKW1.4-65/55-Q.Y	ZKW1.75-65/55-Q.Y	ZKW2.1-65/55-Q.Y	ZKW2.8-65/55-Q.Y	ZKW3.5-65/55-Q.Y	ZKW4.2-65/55-Q.Y	ZKW4.9-65/55-Q.Y	ZKW7.0-65/60-Q.Y
	Rated thermal power		KW	1400	1750	2100	2800	3500	4200	4900	7000
	Rated heat output		Kcal/h	1,200,000	1,500,000	1,800,000	2,400,000	3,000,000	3,600,000	4,200,000	6,000,000
	Boiler design thermal efficiency		%	94~96
	Rated working pressure		Mpa	-0.085
	Heat exchanger working pressure		Mpa	1.25
	Rated heating supplyt=10	Outlet/return water temperature	ºC	65/55
		Circulating water volume	t/h	120	150	180	240	300	360	420	600
		Water supply and return diameter	DN	125	200	200	150	200	200	250	300
	Fuel consumption	0# Light diesel	kg/h	137.6	166.9	197.7	316.5	316.5	392.6	442.3	627.1
		Natural gas	Nm³/h	152.9	200.2	230.3	305.6	379.7	471.2	530.7	752.5
	Flue size		mm	420*300	440*300	600*280	460*460	640*430	760*380	760*460	760*550
	Shipping Weight		KG	5150	5800	7300	7350	11100	11100	15100	17100
	Dimensions	Length	mm	3750	4000	4600	5000	5220	5400	6050	6800
		Width	mm	1700	2000	2100	1900	2300	2300	2500	2700
		Height	mm	2380	2420	2550	2660	2900	2900	3180	3660

Gas vacuum hot water boiler (30 mg) parameter table
Modal		Unit	ZKW0.35-65/55-Q.Y	ZKW0.47-65/55-Q.Y	ZKW0.58-65/55-Q.Y	ZKW0.7-65/55-Q.Y	ZKW0.94-65/55-Q.Y	ZKW1.05-65/55-Q.Y	ZKW1.2-65/55-Q.Y
Rated thermal power		KW	350	480	580	700	940	1050	1200
Rated heat output		Kcal/h	300,000	400,000	500,000	600,000	800,000	900,000	1,000,000
Boiler design thermal efficiency		%	94~96
Heat exchanger working pressure		Mpa	1.25
Rated working pressure		Mpa	-0.085
Rated heating supply t=10	Outlet/return water temperature	ºC	65/55
	Circulating water volume	t/h	30	40	50	60	80	90	100
	Water supply and return diameter	DN	65	65	80	100	100	125	125
Fuel consumption	0# Light diesel	kg/h	30.2	40.2	49.8	60.5	80.6	95.6	127.6
	Natural gas	Nm³/h	34.5	48.2	56.5	68.4	91.2	114.5	106.3
Flue size		mm	φ250	350*220	350*220	φ320	380*280	380*280	φ412
Shipping Weight		KG	2030	3500	3500	3800	4000	4500	4600
Dimensions	Length	mm	2500	3100	3100	3400	3400	3700	3480
	Width	mm	1600	1800	1800	1670	2000	1670	1670
	Height	mm	2160	2200	2200	2520	2550	2450	2410

In 2024, the new version aligns with the rear flue specifications, ensuring compliance with environmental standards of 120 mg, marked by a green label indicating no additional diagrams are needed.

Modal		Unit	ZKW1.4-65/55-Q.Y	ZKW1.75-65/55-Q.Y	ZKW2.1-65/55-Q.Y	ZKW2.8-65/55-Q.Y	ZKW3.5-65/55-Q.Y	ZKW4.2-65/55-Q.Y	ZKW5.6-65/55-Q.Y	ZKW7.0-65/60-Q.Y
Rated thermal power		KW	1400	1750	2100	2800	3500	4200	5600	7000
Rated heat output		Kcal/h	1,200,000	1,500,000	1,800,000	2,400,000	3,000,000	3,600,000	4,800,000	6,000,000
Boiler design thermal efficiency		%	94~96
Heat exchanger working pressure		Mpa	1.25
Rated working pressure		Mpa	-0.085
Rated heating supply t=10	Outlet/return water temperature	ºC	65/55
	Circulating water volume	t/h	120	150	180	240	300	360	480	600
	Water supply and return diameter	DN	150	200	150	150	250	250	300	300
Fuel consumption	0# Light diesel	kg/h	128.2	160.2	193.5	252.7	317.8	380.3	483.84	627.1
	Natural gas	Nm³/h	152.6	190.7	227.33	304.4	381.3	456.4	547.2	752.5
Flue size		mm	420*300	580*400	500*330	460*460	640*430	686*430		760*550
Shipping Weight		KG	6600	7200	7300	10040	11100	12100	13800	17100
Dimensions	Length	mm	3850	4050	4400	5000	5470	5610	6250	6800
	Width	mm	1760	1920	2100	2100	2250	2400	2650	2700
	Height	mm	2540	2660	2750	2920	2980	3060	2150	3660

Main Products

Company Profile

Jiangsu Weifu Special Equipment Co., Ltd. is strategically nestled along Tieta Road, within the vibrant hub of Guyang Town in Dantu District, Zhenjiang City. This prime location enhances our accessibility and operational efficiency.Our company is a beacon of excellence, dedicated to the seamless integration of boiler marketing resources across the expanse of mainland China. Through our robust marketing network, we deliver the unparalleled concept, unmatched quality, competitive pricing, and outstanding service of Weifu's state-of-the-art oil, gas, and electric boilers directly to our esteemed clientele. Guided by the ethos of 'being a real person and doing things honestly,' we craft fine products that warm the world. Weifu advocates for a marketplace where customers gain exceptional value, employees experience profound growth, shareholders reap substantial benefits, companies achieve significant development, and the nation benefits through enhanced tax revenue.
Our dynamic workforce comprises over 200 dedicated employees, including a team of more than 40 seasoned professional technicians, each excelling in their respective fields. Spanning over an expansive 20,000 square meters, our modern factory boasts cutting-edge manufacturing and testing equipment. We specialize in the sophisticated design and meticulous manufacture of gas, oil, and electric hot water boilers, steam boilers, vacuum hot water boilers, and organic carrier boilers, setting new industry standards.
Embracing the philosophy of 'what customers need is what we make,' our core focus remains on boiler products. We have meticulously developed an extensive array of vertical and horizontal gas and oil steam boilers, pressure and normal pressure hot water boilers, and electric heating boiler series. Our portfolio showcases an impressive 7 series and nearly 300 specifications, demonstrating our versatility and commitment to innovation. Every Weifu product is engineered with cutting-edge clean combustion technology, ensuring a minimal environmental footprint while maximizing efficiency. Our horizontal pressure boiler embodies an innovative design featuring advanced structural elements such as corrugated furnace, conical furnace, threaded smoke pipe, and the efficient wet back three-pass system, optimizing performance and durability. Equipped with imported burners from renowned brands like Riello, Aucma, Black & Decker, and Weishaupt, our boilers achieve exceptional levels of efficiency, energy conservation, and environmental protection, setting a benchmark in the industry. Strategically equipped with pressure or normal pressure economizers and condensers, our boilers significantly reduce exhaust temperatures. This innovation also effectively minimizes dust, nitrogen oxides, and sulfur oxides in the flue gas, rendering our boilers remarkably energy-efficient and environmentally conscious. Weifu Boiler proudly stands as a prestigious national supplier of small and medium-sized oil, gas, and electric boilers across China, renowned for our quality and reliability. Our esteemed clientele spans the vast landscape of large and medium-sized cities throughout mainland China, reflecting our extensive reach and trusted reputation. We are honored to contribute significantly to environmental protection and energy conservation initiatives, playing a pivotal role in mainland China's sustainable development journey.

Certifications

Jiangsu Weifu Special Equipment Co., Ltd. proudly holds a prestigious national Class B manufacturing certificate. As we navigate the dynamic boiler market brimming with both opportunities and challenges, Weifu Boiler stands firm in its commitment to 'creativity for development, credit for cooperation, quality for market share.' Our unwavering dedication ensures we remain at the forefront, driving innovation and excellence in every endeavor. Join us on an extraordinary journey as we unveil and share the exceptional value of Weifu Boiler with you, showcasing our passion for innovation and quality.

Packaging & Shipping

FAQ

1. How to buy a good boiler?

A: Choose a good supplier.

B: Specification is clear, steam or hot water, capacity,fuel,pressure and so on

C:Price is not the only problem, quality and service also important.

 

2. What is your main product?

A:Steam boiler, hot water boiler and thermal oil boiler.Gas fired boiler, oil fired boiler, diesel fired boiler, coal fired boiler, biomass fired boiler,Industry boiler and so on.

 

3. Q: How long is your lead time?

A: Generally it is 30 days, depends on your needs and project scales