Low Nitrogen Condensing Hot Water Boilers: Quality and Performance Guaranteed

• 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 the remarkable ability to deliver dual hot water outputs, catering to varying temperature needs simultaneously. Whether you choose to utilize the dual-circuit system or opt for the independent operation of the single-circuit system, experience unparalleled versatility like never before.
High thermal efficiency: Experience unmatched thermal performance with our state-of-the-art heat exchange system, where heat transfer is maximized within a hermetically sealed vacuum chamber. Constructed from top-tier imported stainless steel, our heat exchangers promise exceptional efficiency and considerable energy savings, setting a benchmark in heat exchange technology.
Absolute safety: Operating under a perpetual negative pressure environment, our boiler ensures that explosion risks are entirely eliminated. With an array of advanced safety features, including temperature sensors, safety valves, overheat protection, and vacuum control switches, every potential safety concern is meticulously addressed, guaranteeing peace of mind.

Intelligent control: Harness cutting-edge technology with our digital control system, featuring a user-friendly LCD screen and Chinese interface. Adjust temperatures with ease, monitor real-time furnace and vacuum data, while enjoying seamless automatic recording of operational details. Simplified operation ensures peace of mind, allowing for unattended management.
Eliminate the trouble of registration procedures: Our boiler arrives fully assembled and operates within a negative pressure setting, eliminating any risk of expansion or explosion. Enjoy freedom from exhaustive registration processes, as our system bypasses the need for regulatory supervision, ensuring a cost-effective and hassle-free installation experience.

Energy saving: Our boiler's efficiency is remarkable, with minimal heat medium water usage and a vacuum chamber heat exchange process that utilizes negative pressure steam. This innovative approach ensures rapid attainment of the set temperature within mere minutes, significantly reducing preheating wastage and optimizing energy conservation.
Long life: Our heat exchanger, crafted from superior stainless steel, is engineered for optimal heat transfer and remarkable resistance to corrosion. With flanged connections for straightforward maintenance, and a vacuum state that prevents corrosion or scale build-up, our system promises extended longevity, avoiding direct flame or flue gas contact.
Insulation structure: Employing a robust 100mm double-layer insulation structure, our design expertly minimizes external touch temperatures to ambient levels, significantly boosting safety and enhancing the boiler's thermal efficiency, ensuring that operational excellence is achieved.
Imported low-nitrogen burner: Benefit from our imported low-nitrogen burners that deliver high-efficiency combustion with impressively low noise and emissions. Engineered to meet stringent standards of premier regions, our burners are the pinnacle of eco-friendly innovation.

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

The 2024 edition adheres to rear flue specifications, with green indicators showing compliance without the need for drawings, aligned to 120 mg benchmarks.

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

Nestled at Tieta Road, Guyang Town, Dantu District, Zhenjiang City, Jiangsu Weifu Special Equipment Co., Ltd. stands as a beacon of industrial excellence.Devoted to weaving a comprehensive tapestry of boiler marketing across mainland China, we transmit the essence of Weifu's commitment-encompassing quality, competitive pricing, and unparalleled service-through our extensive network. Every oil, gas, and electricity boiler we offer embodies our dedication to customer satisfaction. Guided by the ethos 'being a real person and doing things honestly', Weifu is dedicated to crafting superior products that bring warmth globally. As we navigate the market, our mission is clear: deliver value to customers, foster employee growth, reward shareholders, drive corporate progress, and contribute to national revenue.
Our dynamic team exceeds 200 professionals, with a robust cadre of over 40 specialized technicians, all committed to innovation and excellence. Spanning more than 20,000 square meters, our state-of-the-art facilities house the latest in manufacturing and testing equipment. We are specialists in designing and producing a diverse range of boilers, including gas, oil, and electric variants-spanning hot water, steam, vacuum, and organic carrier boilers.
Embodying the philosophy 'what customers need is what we make', Weifu has meticulously engineered an expansive portfolio of seven series, nearly 300 specifications, featuring vertical and horizontal configurations of gas and oil steam boilers, hot water boilers at varying pressures, and electric thermal oil boilers-all tailored to meet diverse demands. Every Weifu product integrates cutting-edge clean combustion technology, underscoring our commitment to sustainability. The horizontal pressure boilers are crafted with advanced features such as corrugated and conical furnaces, threaded smoke pipes, and a wet back three-pass design, setting a benchmark in structural innovation. Equipped with world-class burners from Riello, Aucma, Black & Decker, and Weishaupt, our boilers achieve exemplary efficiency, energy conservation, and environmental stewardship. Enhanced with pressure or normal pressure economizers and condensers, our boilers minimize exhaust temperature and significantly curtail dust, nitrogen, and sulfur emissions, making them paragons of energy saving and eco-friendliness. As a leading national supplier, Weifu Boiler proudly serves the small and medium-sized oil, gas, and electric boiler markets throughout China. Our esteemed clientele is spread across the vast urban landscapes of China's major cities. Weifu's dedication to reducing energy consumption and safeguarding the environment has left an indelible impact on the ecological footprint of mainland China.

Certifications

The company holds a prestigious national Class B manufacturing certificate. In the dynamic and ever-evolving boiler market, where incredible opportunities and formidable challenges coexist, Weifu Boiler remains steadfast in its principles. We are committed to 'creativity for development, credit for cooperation, quality for market share,' ensuring resilience and growth. We are excited to share the exceptional value and unparalleled excellence of Weifu Boiler with you.

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