350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler

Product Details
Customization: Available
Function: Steam Boilers
Fuel: Electric Heating
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  • 350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
  • 350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
  • 350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
  • 350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
  • 350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
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  • Overview
  • Specification
  • Parameters
  • Company Profile
  • More Products
  • Packaging & Shipping
  • FAQ
Overview

Basic Info.

Model NO.
350kw
Installation
Packaged Boiler
Structure
Water Tube
Media
Steam
Manufacturing Level
C
Burning Style
Chamber Combustion Boiler
Usage
Industrial, Home, Vehicle, Power Station, Commercial Building
Boiler Thermal Efficiency
100.69
Low Water Level Protection
Yes
Over Temperature Protection
Yes
Over Pressure Protection
Yes
High Smoke Temperature Protection
Yes
Low Gas Pressure Protection
Yes
Mechanical Emergency Stop Switch
Yes
Specification
350kw
Trademark
OEM
Origin
China
HS Code
8403109000
Production Capacity
1500PCS/Year

Packaging & Delivery

Package Size
155.00cm * 68.00cm * 13.00cm
Package Gross Weight
500.000kg

Product Description

Q Series Commercial  Floor Standing Fully Premixed Once-through Ultra-low NOx Steam Modular Boiler
Our modular gas floor-standing boiler delivers scalable, energy-efficient heating for large residential complexes, hotels, hospitals, and industrial facilities. Designed with independent module technology, this cascade systems allow multiple boilers connected in parallel for higher capacity demands,the capacity from 350kw(0.5 ton)to 700kw (1 ton)
Specification
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
Technological Advantages
1.Multi-level Safety Protection
*Integrated Circuit - Multi-protection System
*Water Level Probes - Real-time Detection (Prevents dry-running)
*Ionization Flame Monitoring - Continuous Combustion Supervision
*Pressure Protection - Real-time Monitoring
*Flue Gas Temperature Protection - Mechanical Cut-off
*Mechanical Pressure Control - Overpressure Protection
2.High-Efficiency Condensing Technology
*Flue Gas Temperature as Low as 40-60°C (PVC pipes replace steel chimneys)
3.Steam-Water Separation Technology
*Steam Dryness Up to 99%
4.Low-NOx Combustion Technology
*Variable Frequency Combustion + Pressure Tracking for low NOx emissions and stable steam pressure output.
5. Energy & Gas Savings
(1)10% Lower Flue Gas Temperature
Traditional boiler (8h/day full load @ 74.06 Nm³/h): 592 m³/day
Annual cost (@ 0.4 USD/m³, 330 workdays): 78,144 USD/year
10% Savings = 7,814.4 USD/year
(2)3% Savings from Constant Pressure Output
Unlike traditional 3-stage boilers, inverter modulation avoids frequent starts/stops.
3% Savings = 2,344.3 USD/year
(3)30-Minute Faster Pressure Rise
Saves 37 m³ gas/day → 4,884 USD/year
Total Annual Savings (1-ton unit): 15,042.7 USD
(Gas prices vary by market; calculations based on estimated operating hours.)
6. Performance Comparison
Model
Our Steam Boiler
Traditional Boiler
Water Volume
30L (Non-inspected)
Pressure Vessel
Heat Loss
0.5%-1%
2%-5%
Flue Gas Temperature
<60°C
>120°C
Steam Generation Time
2 minutes
30 minutes
Burner Control
20%-100% gas modulation
3-stage firing
Start/Stop Frequency
50%+ reduction
High
Footprint
<3 m²
>12 m²
Parameters

Modle
LL9GKQ350-Q
LL9GKQ700-Q
Boiler Body Parts
Boiler Material
Composite boiler steel + 316L stainless steel (finned)
Condenser Material
316L stainless steel
Rated Pressure
1.0MPA(Above 1.0MPA can be customized)
Boiler Thermal Efficiency
100.69%
Consumption (Natural Gas)
37.03Nm³/h
74.06Nm³/h
Exhaust Smoke Temperature
<60℃(Condenser optional)
Body Weight
1000kg
1800kg
Boiler Body Welding Method
Full argon arc
Combustion Parts
Chimney Diameter
Φ160
Φ219
Temperature Sensor
PT100
Combustion Adjustment Method
20-100 Proportional Adjustment
Burner Brand
Honeywell (Fully Premixed)
NOx
<30mg/m³
Gas Pressure (Dynamic Pressure kpa)
3-8kpa
Ignition Method
Automatic Electronic Ignition / Two Stage Pre-ignition
Control Method
Program Control + Intelligent Internet of Things
Protection Configuration
Protective Function
Low water level protection, Over temperature protection, Over pressure protection,
High smoke temperature protection, Low gas pressure protection, Mechanical emergency stop switch
Size
Product Dimension (LxWxH)
2130*1500*2000
2130*1500*2300
Heating Area
3500-9000
7000-17500
Company Profile
About Us
With 28000+ m2 Factory Area, we are a leading high-tech enterprise specializing in the production of advanced heating equipment, including gas / electric heating systems, modular boilers, and intelligent control systems. With state-of-the-art automated production lines and laboratory, we provide innovative, efficient, and sustainable heating solutions tailored to meet the highest industry standards.
 
Our expertise covers vector variable frequency low nitrogen heating systems, ASC (Adaptive System Control) technology and fully premixed condensing boilers, making us a trusted partner for smart heating solutions around the world.
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
Advanced Production & Testing: 
Strict Quality Control: 
Proprietary Technologies: 
Equipped with the most advanced automatic production lines and testing equipment, ensuring top-tier product quality and reliability.
With an annual production capacity of 200,000 units gas / electric heating boilers and 3,000 units fully premixed condensing low-nitrogen commercial boilers.
To ensure uncompromising quality, we operate a dedicated incoming inspection lab and aging simulation lab.
Every component undergoes years of accelerated durability testing under extreme conditions – only those that meet our stringent standards are approved for production.
Possessing a number of invention patents, mastering the core technologies of vector variable frequency low nitrogen, Adaptive System Control function, and full premixed condensing boiler.
Participated in the major drafting and compilation of multiple national standards and industry standards
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
Strong R&D Capabilities
Our product lineup includes:
-Single circuit gas boilers for heating-only applications
-Dual circuit gas boilers for combined heating and domestic hot water
-Compact mini boilers, ideal for space-saving installations
-Cascade systems with multiple boilers connected in parallel for higher capacity demands
-High power wall mounted gas boiler up to 150kw for villa and commercial buildings
-Floor standing condensing gas / steam boiler for industrial or commercial use, such as schools, office buildings, shopping malls, etc.
-Segmented combustion and Modulated combustion technology for enhanced energy efficiency
-The self-developed PCB makes the product more flexible to use and is convenient for installation and maintenance
More Products
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
Packaging & Shipping
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
350kw Fully Premixed Through-Flow Ultra-Low Nitrogen Commercial Steam Boiler
Foam Anti-collision
Container Loading
Warehouse
FAQ
Q: What's the lead time for orders?
A: It will take 30–45 days.
 
Q: What's the warranty and after sales service?

A: We provide 1 year warranty,and our engineers can provide online guidance .
Q: What types of boilers do you offer?
A: We specialize in a wide range of heating equipment, including gas boilers, electric boilers, condensing boilers, combi boilers, and modular boilers. Our products are designed for both residential and commercial use, ensuring high efficiency and reliability.
 
Q: What is the lifespan of your boilers?
A: Our boilers are built to last, with an average lifespan of 15-20 years when properly maintained. We use high-quality materials and simulate real environment aging test to ensure durability and long-term performance.
 
Q: How can I request a quote?
You can easily request a quote by email, WeChat or WhatsApp. Provide your requirements, and our team will prepare a customized quotation for you.
 

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