Jiedeng’s Air Drain Valve Passed the Strict GB/T 2423 Environmental Reliability Test

Xiamen Jiedeng Construction Machinery Drain Valve has undergone comprehensive reliability validation, strictly following the GB/T 2423 series national standards—subjected to 24 hours each at -40°C and 80°C for high-low temperature testing, as well as 96 hours of neutral salt spray testing.

A monthly terminal pull-force sampling inspection mechanism has been established. Multiple tests were monitored and recorded in real time throughout the process, with no abnormalities detected in electrical performance, sealing, or appearance.

All specifications meet requirements, enabling compatibility with various commercial vehicles such as mining trucks, loaders, and semi-trailers under complex and harsh operating conditions.

Our construction machinery drain valve DC24V can withstand a load and pass the 24-hour test under -40℃ low temperature and 24-hour test under 80℃ humidity. The pressure drop is ≤ 60kPa, and the insulation resistance is ≥ 100MΩ.

After 96 hours of 5% salt spray, there is no rust or leakage. The average pull force of the terminals per month is 110.3N, which is higher than the 70N qualified threshold. The crimping structure is stable, and there is no risk of breakage or air leakage during long-term use.

Low-temperature test (GB/T 2423.1-2008 Test A: Low Temperature)

Details of the mining truck drain valve low-temperature test:

Test equipment: Programmable constant temperature and humidity test machine, temperature control accuracy ±0.1℃

Sample condition: JD-DDPS-004 type electrically controlled drain valve, rated voltage DC24V, in load operation state

Test conditions: Test temperature -40℃ ±2℃, duration 24 hours, power-on operation for 2 seconds per hour (simulating actual drainage conditions)

Test environment: Laboratory temperature 25℃, relative humidity 56%RH

Testing time points: Continuous 24 hours, record working status once per hour

Test results:

1. 25 time points were monitored throughout the test process. The product's working condition was all normal, without jamming or air leakage.

2. After the test, the product's appearance had no damage, the adhesive bonding had no detachment or cracking.

3. Working pressure drop ≤ 60kPa, not more than 3 times the standard state, meeting the standard requirements.

Function test: Valve opening/closing is normal, heating function is normal, qualified determination

High temperature test (GB/T 2423.2-2008 Test B: High Temperature)

Details of the Wheel loader air drain valve High Temperature Test:

Test Equipment: Programmable Constant Temperature and Humidity Test Machine, Temperature Control Accuracy ±0.1℃

Sample Condition: JD-DDPS-004 type electrically controlled drain valve, rated voltage DC24V, operating under load

Test Conditions: Test Temperature 80℃ ± 2℃, Relative Humidity 90%RH, Duration 24 hours, Power-on operation for 2 seconds per hour

Test Environment: Laboratory Temperature 26.2℃, Relative Humidity 59%RH

Testing Time Points: Continuous 24 hours, Record working status once per hour

Test Results:

1. 25 time points were monitored throughout the test process. The product's working condition was all normal, with no air leakage or coil burnout.

2. After the test, the product's appearance was not deformed, the coating did not fall off, and the sealing parts did not age and stick together.

3. Insulation Resistance ≥ 100 MΩ, Withstand Voltage Test AC500V/1min without breakdown

Function Test: Valve operation was normal, sealing performance was good, and it was judged as qualified

Salt Spray Test (GB/T 2423.17-2008 Test Ka: Salt Spray)

Details of the salt spray test for the air tank drain valve of the semi-trailer truck:

Test equipment: Precision salt spray test chamber

Number of samples: 5 JD-DDPS-004 finished products

Test conditions:

Sodium chloride solution concentration: 5% ± 0.1%, pH value 6.5 - 7.2

Laboratory temperature: 35℃ ± 1℃, saturated bucket temperature 47℃ ± 1℃

Compressed air pressure: 1.00 ± 0.01 kgf/cm²

Spray volume: 1 - 2 mL/(80cm²·h)

Sample placement angle: 15° - 30° from the vertical direction

Test duration: Continuous spray for 96 hours

Test time: Total 96 hours

Post-treatment: After the test, gently rinse the salt deposits on the sample surface with ≤ 35℃ flowing clean water, and leave it to air dry for 2 hours before checking

Test results:

The metal shells, threads, and connectors of all 5 samples showed no rust, oxidation, or coating detachment.

Sealing performance test: No leakage under 1.0 MPa pressure for 30 seconds

Electrical performance test: Insulation resistance, coil resistance, and action function were all normal

Final determination: All qualified, meeting the requirements for use in coastal high-salt spray areas

Terminal tensile strength test (monthly regular verification)

Details of the compressed air tank autodrain for trucks tensile test:

Test equipment: Digital tensile testing machine, accuracy ±1%

Test purpose: To verify the stability of the terminal connection quality of the wiring harness, and to ensure that no terminal loosening or wire breakage occurs during vehicle use

Test frequency: Monthly 1-time random sampling test, 5 finished products are selected each time, and 4 connection terminals are tested for each one

Test conditions:

Wiring harness specification: 0.5mm² multi-strand copper core automotive wire

Strip length: 4 ± 0.5mm

Pressing equipment: Numerical control terminal pressing machine, AMP-specific molds

Tensile speed: 50mm/min, uniform tensile until the terminal separates from the wire

Judgment criteria: Tensile force ≥ 70N is qualified, and the fracture position should be on the wire rather than at the pressing point

Test data on June 28, 2026 (unit: N)

Test conclusion: The tensile force values at the 20 test points ranged from 101.9N to 119.6N, with an average value of 110.3N. This far exceeded the standard requirement of 70N, and all cases were wire breakage rather than loosening at the crimping points. The crimping quality was stable and reliable.