99.999% High-purity Nitrogen Generator For SMT Reflow Oven
Advanced nitrogen generation system specifically designed for SMT reflow oven applications, delivering ultra-high purity nitrogen for superior soldering performance.
Key Features
- Easy installation and operation with low operational costs
- Patented filling technology ensures molecular sieve compactness and extended service life
- High adsorption efficiency improves product performance while reducing energy consumption
- Modular combination structure allows flexible capacity adjustment, reducing procurement costs
- RS485 signal communication for strong compatibility and adaptability
- Mobile app control for on/off operation and real-time parameter monitoring
- Online communication via TCP+ remote internet communication
- National standard valves and instruments ensure stable, reliable quality
- Multiple units can operate in parallel with N+1 backup capability
Technical Specifications
| Model |
Output Capacity |
Nitrogen Purity |
Dimensions L*W*H (mm) |
Air Inlet |
Gas Outlet |
Weight (kg) |
Power Supply |
| HN4010 |
10Nm³/h |
≥99.99% |
1300*950*1850 |
G1/2" |
G1/2" |
500 |
AC220V/0.2KW |
| HN4020 |
20Nm³/h |
≥99.99% |
1400*950*1850 |
G1" |
G1/2" |
600 |
AC220V/0.2KW |
| HN4030 |
30Nm³/h |
≥99.99% |
1500*950*1850 |
G1" |
G1/2" |
700 |
AC220V/0.2KW |
| HN4040 |
40Nm³/h |
≥99.99% |
1600*1000*2000 |
G1" |
G1/2" |
800 |
AC220V/0.2KW |
| HN4050 |
50Nm³/h |
≥99.99% |
1600*1200*2200 |
G1" |
G1/4" |
1000 |
AC220V/0.2KW |
| HN4060 |
60Nm³/h |
≥99.99% |
1600*1200*2200 |
G1" |
G1" |
1200 |
AC220V/0.2KW |
| HN4080 |
80Nm³/h |
≥99.99% |
1800*1400*2500 |
G1" |
G1" |
1600 |
AC220V/0.2KW |
| HN4100 |
100Nm³/h |
≥99.99% |
2000*1600*2600 |
DN32 |
G1" |
1800 |
AC220V/0.2KW |
| HN4150 |
150Nm³/h |
≥99.99% |
2200*1600*2700 |
DN40 |
G1" |
2400 |
AC220V/0.2KW |
| HN4200 |
200Nm³/h |
≥99.99% |
2300*1600*2700 |
DN50 |
DN40 |
3000 |
AC220V/0.2KW |
| HN4250 |
250Nm³/h |
≥99.99% |
2400*1600*2700 |
DN50 |
DN40 |
4000 |
AC220V/0.2KW |
| HN4300 |
300Nm³/h |
≥99.99% |
2500*1600*2760 |
DN65 |
DN40 |
5600 |
AC220V/0.2KW |
| HN4400 |
400Nm³/h |
≥99.99% |
2700*1800*2900 |
DN65 |
DN50 |
6500 |
AC220V/0.2KW |
| HN4500 |
500Nm³/h |
≥99.99% |
3200*2400*3900 |
DN80 |
DN65 |
7500 |
AC220V/0.2KW |
| HN4600 |
600Nm³/h |
≥99.99% |
3500*2500*4000 |
DN80 |
DN65 |
8500 |
AC220V/0.2KW |
| HN4700 |
700Nm³/h |
≥99.99% |
3500*2500*4500 |
DN100 |
DN80 |
9500 |
AC220V/0.2KW |
| HN4800 |
800Nm³/h |
≥99.99% |
3800*2600*4500 |
DN100 |
DN80 |
11000 |
AC220V/0.2KW |
| HN4900 |
900Nm³/h |
≥99.99% |
3800*2600*5200 |
DN100 |
DN80 |
12000 |
AC220V/0.2KW |
| HN41000 |
1000Nm³/h |
≥99.99% |
4000*2800*5500 |
DN100 |
DN80 |
15000 |
AC220V/0.2KW |
Application Areas of SMT Nitrogen Generator
Core Applications (SMT Workshop)
Reflow Soldering (Most Critical)
Purpose: Nitrogen-filled furnace with oxygen content controlled at 50-1000 ppm (commonly <100 ppm).
Effect: Produces bright, full solder joints with strong wettability; reduces cold solder joints, bridging, and solder balls, increasing yield by 10-30%; suitable for BGA/QFN/0201/01005 micro-components and lead-free solder.
Purity: Conventional 99.99%; automotive/medical/aerospace require 99.999% (O₂ <10 ppm).
Wave Soldering / Selective Wave Soldering
Purpose: Nitrogen cover layer above solder pot to suppress high-temperature oxidation.
Effect: Reduces solder dross by 50-80%, lowering solder costs; creates more reliable solder joints.
Dispensing / Coating / Curing
Purpose: Nitrogen purging protection to prevent oxidation and moisture absorption of glue/coatings.
Effect: Ensures uniform coatings, strong adhesion, and stable curing, enhancing insulation and reliability.
Precision Packaging (MiniLED / Chips)
Purpose: Micro solder joint protection for BGA/QFN/CSP/SiP.
Effect: Protects extremely fine-pitch solder joints, preventing oxidation and cold solder joints.
Component / PCB Storage and Transport
Purpose: Nitrogen filling to prevent moisture and oxidation, especially for copper surfaces, gold surfaces, and precision components.
Effect: Extends shelf life and prevents solder pad oxidation.
Extended Applications
Semiconductors: Wafer cleaning, etching, deposition, annealing, sintering, packaging protection.
Lithium Batteries: Electrode drying, nitrogen protection, explosion prevention, inert environment.
Photovoltaics: Silicon wafer cutting, diffusion, PECVD nitrogen protection.
Hardware / Precision Parts: Soldering, heat treatment, anti-oxidation protection.
Key Parameters (SMT Common Use)
Purity: 99.9%-99.999% (oxygen content 10-1000 ppm)
Dew Point: ≤ -40℃ (prevents water vapor affecting soldering)
Pressure: 0.4-0.6 MPa
Flow: Single-track 8 temperature zones 20-30 Nm³/h; dual-track 12 temperature zones 50-60 Nm³/h
Why Use On-site Nitrogen Generation
Compared with liquid nitrogen / cylinders: reduces cost by 30-50%, ready to use, no supply interruption risk.
Stability: Purity / pressure / dew point controllable, suitable for 24-hour continuous production.
Cleanliness: Multi-stage filtration, oil-free and water-free, supports wash-free process.
Types of Nitrogen Generators
PSA Pressure Swing Adsorption Nitrogen Generator
Principle: At room temperature, oxygen is adsorbed using carbon molecular sieve (CMS) under pressure, then desorbed under reduced pressure; two towers alternate for continuous gas production.
Purity: 95%-99.9995% (commonly 99.99%/99.999% for SMT)
Flow rate: 5-5000 Nm³/h (SMT single track 20-30 Nm³/h, double track 50-60 Nm³/h)
Advantages: Fast start (3-10 minutes), adjustable purity, low energy consumption, compact size, easy maintenance
Disadvantages: Cost rises for ultra-high purity (>99.999%)
Applications: SMT reflow / wave soldering, electronic packaging, semiconductors, lithium batteries, photovoltaics.
Membrane Nitrogen Generator
Principle: Compressed air passes through hollow fiber membrane; O₂/CO₂/H₂O permeate quickly, while N₂ is retained and enriched.
Purity: 90%-99% (maximum ≤99%, does not meet high-purity SMT requirements)
Flow Rate: 1-1000 Nm³/h
Advantages: Ready to use immediately, smallest size, maintenance-free, no moving parts
Disadvantages: Low purity, high oxygen content, non-adjustable
Applications: Low-purity scenarios; not suitable for SMT soldering.
Cryogenic Air Separation Nitrogen Generator
Principle: Air compression and purification → liquefaction (-196°C) → fractional distillation to separate N₂/O₂.
Purity: 99.999%-99.9999% (ultra-high purity)
Flow rate: 1,000 to tens of thousands Nm³/h (ultra-large flow)
Advantages: Highest purity, largest flow, can produce liquid nitrogen
Disadvantages: High investment, large footprint, slow start-up (≥24h), high energy consumption
Applications: Large-scale petrochemical, metallurgy, aerospace; rarely used in SMT.
SMT Workshop Equipment Selection
Preferred: PSA nitrogen generator (purity 99.99%/99.999%, flow matched, low cost, easy maintenance)
Not recommended: Membrane separation (insufficient purity)
Not recommended: Cryogenic (high investment/energy consumption)
Nitrogen Generator FAQ
1. What nitrogen purity is required for SMT production?
General soldering: 99.99%; Automotive, medical and high-precision packaging: 99.999%.
2. Why does soldering need nitrogen protection?
Inhibits high-temperature oxidation, reduces solder dross and defective joints, improves soldering quality and product yield.
3. What is the standard dew point index?
Stably controlled below -40℃ to avoid moisture affecting welding effect.
4. Normal working pressure range?
0.4-0.6 MPa, matching daily SMT production demands.
5. How much gas consumption per hour?
20-30 Nm³/h for single-track 8-zone furnace; 50-60 Nm³/h for dual-track 12-zone furnace.
6. On-site generator vs liquid nitrogen cylinder?
On-site equipment cuts cost by 30%-50%, steady gas supply with no outage risk.
7. Can the machine run 24 hours continuously?
Yes, stable performance supports non-stop long-term operation.
8. Is the output gas clean enough?
Multi-stage filtration achieves oil-free and water-free gas, fit for no-clean welding process.
Functions of Nitrogen Generator
- Separate qualified nitrogen from compressed air
- Provide anti-oxidation protection for industrial production
- Maintain inert atmosphere to prevent combustion and explosion
- Supply stable air pressure and continuous gas output
- Remove moisture, oil and impurities from air
- Support long-time uninterrupted working
- Meet different purity requirements of production process
- Protect workpieces and improve product yield
Operation Notes
- Keep operating environment dry, dust-free and well ventilated
- Check air pressure and water drainage regularly
- Replace filter elements on schedule to ensure gas cleanliness
- Monitor nitrogen purity, pressure and dew point in real time
- Avoid frequent startup and shutdown
- Inspect pipelines and valves for air leakage periodically
- Do not adjust internal parameters arbitrarily
- Stop running immediately once abnormal noise or fault occurs
- Conduct routine maintenance to extend service life
- Keep stable power supply during operation
- Unqualified nitrogen purity, excessive oxygen content
- Abnormal air pressure and insufficient gas output
- Excessive moisture and oil content in gas
- Malfunction and air leakage of switching valves
- Aging and failure of filter elements and carbon molecular sieve
- Abnormal noise and vibration during operation
- Electrical failure, inaccurate sensor data
- Air leakage of pipeline and overheating alarm
After-sales Service
- Professional on-site installation, commissioning and operation training
- Long-term warranty and lifetime technical support
- Quick response to fault handling and troubleshooting
- Regular return visit and routine maintenance guidance
- Adequate supply of original spare parts and consumables
- On-site gas production cuts operating cost greatly compared with bottled and liquid nitrogen
- Low power consumption, less energy waste in long-term operation
- Durable core parts, low failure rate and fewer maintenance expenses
- Compact structure saves workshop space
- Stable gas quality improves product yield and economic benefitCustomer feedback and after-sales communication
Customer feedback and after-sales communication
Inline modular nitrogen generator connects production lines easily with steady gas output and flexible expansion. Timely after-sales finishes installation and troubleshooting promptly. Reliable performance and good service gain positive reviews and repeat orders.
Certification
CNSMT specializes in the development and production of modular online nitrogen generators, with stable equipment operation, high gas production efficiency, and adaptability to various production line conditions. With reliable quality, our products are sold both domestically and internationally, and are highly favored by customers. The equipment is priced affordably, with outstanding cost-effectiveness, effectively controlling the operating costs of the enterprise. We have a comprehensive after-sales service system, providing installation and debugging, technical guidance, and fault repair, with timely response and thoughtful service. Adhering to the concept of quality first, we sincerely welcome customers from all walks of life to consult and cooperate.
