High-Pressure Nitrogen Leak Detector for Air Conditioner & Heat Pump Production Lines

What is  the High-Pressure Nitrogen Leak Detector?

The  High-Pressure Nitrogen Leak Detector in an assembly line is a critical quality control process designed to identify gross leaks in HVAC/R systems (air conditioners, heat pumps, chillers, etc.) before they advance to costly downstream stages like refrigerant charging or final assembly. Below is a detailed breakdown:

Applications:

① Residential ACs: Evaporator/condenser coils, copper tubing.

② Commercial Systems: Chiller shell-and-tube heat exchangers (tested at 30+ bar).

③ Heat Pumps: Hydraulic modules with oil-resistant seals.

④Refrigerators/Water Dispensers: Hermetic compressor systems.

How It Works

1.High-Pressure Nitrogen Injection

• The system is pressurized with dry nitrogen gas (typically 15–40 bar/218–580 psi) via automated nozzles.
• Why nitrogen? Chemically inert, moisture-free, and safe for refrigeration systems.

2.Pressure Stabilization

• Pressure is held for 1–5 minutes to allow temperature equilibration.
• Critical step: Eliminates false leaks caused by thermal contraction/expansion.

3.Pressure Decay Measurement

• Precision sensors (resolution down to 0.1 Pa) monitor pressure drop over 30–120 seconds.
• A drop beyond thresholds (e.g., >500 Pa/min) indicates a gross leak (≥5 cc/min).

4.Automated Decision & Rejection

• Leaky units are diverted automatically via reject gates.

• Passed units proceed to the next assembly stage.

Why This Test is Crucial

1.Cost Savings

Prevents wasting expensive materials (compressors, refrigerant, coils) on defective assemblies.

Avoids rework labor (saving 60% vs. post-assembly repair).

2.Downstream Protection

Stops oil/moisture-contaminated units from damaging refrigerant charging stations.

Complies with EPA Section 608 leak-rate regulations.

3.Efficiency

≤60-second test cycles sync with high-speed production lines.

Catches 98% of gross leaks (e.g., cracked welds, faulty seals).

Core Process Keywords

1. High-Pressure Nitrogen Leak Test

2. Pressure Decay Leak Detection

3. Gross Leak Screening System

4. Nitrogen Soak Testing (Stabilization Phase)

5. Automated Pressure Loss Verification

   Product Paramenters

   After Warranty Service	Video technical support, Online support, Spare parts, Field maintenance and repair service
   Warranty	1 Year
   Detection accuracy	5KPa/5S
   Detection time	5-30Min/Unit(Settable)
   Pressure testing	1.5-4.5MPa(Settable)
   Visualization System	Touch screen display
   Control System	PLC logical control
   Function	Pressure-Pressure maintained-Detect-Auto judgment
   Connection Tube Length	3 Meters (Standard) / Customizable
   Data storage function	Optional
   Power supply and rated power	AC220V 50Hz/0.3Kw
   Product Size(L*W*H)	430*550*1300mm

    

    

   Pre-sales, After-sales Service Commitment

   1. Pre-sale: free of charge according to customer requirements to develop a reasonable design plan until the realization of customer production expectations;

   2. Assign professional and technical personnel to provide customers with free equipment basic knowledge, practical operation, maintenance, troubleshooting training, and customers can also assign technical personnel or operators to our company for free training;

   3. On-site equipment installation and commissioning for customers, regular on- site or telephone visits, answer questions and guidance for customers;

   4.The machine shall be guaranteed for one year under the premise of reasonable use by the customer. The maintenance work is carried out at the door, and the maintenance response time is not more than 24 hours.

    

   Full value chain services

   1.Manufacturing:Dongliu production base covers an area of ​​12,000 square meters and has 150 employees. After the production line equipment is assembled, it will be sent to the customer for on-site installation to ensure quality and accuracy.

   2.Research and Development:52 R&D personnel, accounting for 40%.Successfully developed a series of world-leading refrigeration performance testing products.

   3.Dual-channel strategy: combined systems and independent products
   Continuously optimize the value supplier network layout and pre-sales service

   4.System Integration:Global solution center for the entire process of refrigeration equipment production.Pioneer and promoter of many applications in automation and intelligence.

   5.Services:24-hour*7-day non-stop service; providing a complete service portfolio from spare parts, emergency services, on-site services to system services.

    

   FAQ

    

   Q1:What is your delivery time?

   A1:7-30 days, depends on quantity.

    

   Q2: What is the infromation will I offer to you before quotation?
   A2: a. What is the size of your factory?
   b.What is your production capacity per 8hours?
   c. What kind of refrigerant will you use?
   d. What is the cooling capacity range BTU?
   e. Do you prefer manual line or automatic line?
   Other information as more as possible.

   
   Q4: How about installation overseas service?
   A4: We will arrange 3-5 engineers oversea field installation ,commissioning and training is available .And customers will bear our engineers round-trip ticket, daily local transport cost,food and living charge.
   
   Q5: Are you manufacturer or trading company?
   A5: We are professinal manufacturer of air conditioner & heating assembly line and auxiliary equipments.