The 24V automatic drain valve supplied by Xiamen Jiedeng has an exposed thickness of only 10mm, with standard M22/M32 threads. It has IP68 protection, capable of being immersed in 1-meter water depth for 24 hours. It has a 6.4W constant temperature heating function up to 80℃, and can melt ice in a -40℃ environment within 5 minutes. The heat efficiency is increased by 40%. The fluorine rubber composite seal is compatible with 0-1.1MPa pressure, the coil can withstand AC500V, the average pull force of the terminals exceeds 110N. After 96 hours of salt spray and ±40/80℃ 24-hour high-low temperature verification, the sealing life is ≥8 years.
※ Ultra-thin built-in installation structure: The 24V DC solenoid drain valve innovatively adopts a built-in electromagnetic valve design. The total assembly's exposed thickness is only 10mm. Compared to the traditional drainage valve with a structure protruding 30-50mm from the chassis, it completely solves the industry pain points of low-chassis buses and buses having poor passability and being prone to damage from road obstacles. The valve body uses M22×1.5/M32×1.5 standard air reservoir threads, and the installation is highly interchangeable. There is no need to modify the air tank structure to directly replace the traditional manual valve.
※ IP68 high protection design: The valve body is entirely protected by encapsulation and sealing rings. The electromagnetic coil is completely sealed inside the valve. The connection terminals use AMP automotive-grade waterproof connectors, with a protection level reaching IP68. It can be submerged in 1-meter water depth for 24 hours without getting wet, fully adapting to harsh usage environments such as vehicle chassis high-pressure water gun rinsing, rainy and snowy weather, and muddy road conditions.
※ Adhesive High-Efficiency Heating Technology: A 24V electronic air tank valve independently developed PTC constant temperature heating module with a heating power of 6.4W, maintaining a constant heating temperature within 80℃ ± 5℃. The heating element is installed in an embedded manner closely attached to the water path of the valve body, increasing the heat conduction efficiency by over 40%. In an extreme low temperature environment of -40℃, it can completely melt the ice inside the valve body within 5 minutes, achieving rapid drainage and effectively resolving the stubborn problem of frozen and inoperable drainage valves in northern winters.
※ Multi-Layer Composite Sealing Technology: A dual sealing structure of radial sealing and end face sealing is adopted. The sealing components are made of fluororubber materials resistant to high and low temperatures, with a Shore hardness of 70 ± 5HA, and a compression permanent deformation rate of ≤ 15% (125℃ × 70h), ensuring zero leakage within the full pressure range of 0 to 1.1MPa, and a sealing lifespan of up to 8 years or more.
The raw materials for the Heated air tank drain valve are also subject to very strict inspections during the incoming material process.
| Metal valve | Material spectral analysis (to ensure that the 6061/HPb59-1 material meets the requirements), comprehensive size inspection (thread gauge, form and position tolerance), coating thickness measurement (zinc-nickel coating≥8μm), appearance defect inspection |
| Rubber seal | Hardness test (Shore A 70±5), tensile strength≥10 MPa, elongation at break≥200%, compression permanent deformation≤15%, high and low temperature resistance test (-40℃for 24 hours without cracks, 125℃for 70 hours without aging) |
| Solenoid coil | DC resistance test (36Ω ±5% at 20℃), inter-turn insulation test, withstand voltage test (AC 500V/1 minute without breakdown), insulation resistance≥100MΩ, suction force test (≥15N) |
| Electron component | PTC heating element resistance measurement, temperature control device activation temperature detection (disconnection at 80℃ ±5℃), connector insertion and removal force test, terminal coating inspection |
The Heated automatic drain valve is monitored in real time during the manufacturing process.
FAI system: After each shift startup, mold change, or material change, a first-piece inspection must be conducted. The operator performs self-inspection, the team leader conducts re-inspection, and the quality inspector carries out specialized inspection. Only after confirming that dimensions, performance, and appearance are all qualified can mass production proceed.
Process Inspection: Quality inspectors conduct inspections every two hours on critical processes, recording process parameters such as crimping pressure, dispensing torque, and assembly dimensions, and immediately stop the machine for adjustment upon detecting any abnormalities.
Terminal crimp control: Utilize CNC terminal crimping machines with real-time monitoring of crimp pressure and crimp height maintained within 1.2±0.1 mm; conduct destructive tensile tests on terminals monthly to ensure consistent crimp quality.
100% gas tightness full inspection: After each product is assembled, a 30-second air tightness test is conducted under a pressure of 1.0 MPa. If the pressure drop is ≤ 0.01 MPa, it is considered qualified. This ensures that no leaking products are released.
Power-on operation test: For each product, a DC24V power-on operation test is conducted. The response time for valve opening/closing is ≤ 0.5 seconds, and the operation is smooth without any jamming.
Address
No. 90, Siming Industrial Park, Meixi Road, Tongan District, Xiamen City, Fujian Province, China
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