Dongfeng GX Dual chamber air storage cylinder assembly 3513550-91450

The assembly features a hermetically sealed dual-chamber design, divided by a high-strength internal partition that creates two independent air storage spaces (each with a volume of 10-15 liters, depending on Dongfeng GX variant). This isolation ensures:

Functional Separation: One chamber supplies compressed air to critical systems (e.g., service brakes, emergency brakes) while the other powers auxiliary systems (e.g., air suspension, door controls, or horn). This prevents cross-system pressure loss—if one chamber develops a leak, the other maintains pressure for safety-critical functions, reducing braking failure risks.

Pressure Stability: Each chamber is equipped with an independent pressure relief valve and drain valve, allowing separate monitoring and maintenance of air pressure and moisture levels. The partition is welded using automated robotic welding technology, ensuring a leak-proof seal with a pressure retention rate of ≥ 95% over 24 hours at maximum operating pressure

Cylinder Body: Constructed from seamless cold-rolled carbon steel (SAE 1020 or ST37-2) with a wall thickness of 3-4mm—engineered to withstand long-term exposure to high air pressure (maximum working pressure: 1.2 MPa; burst pressure: ≥ 3.6 MPa) without deformation or cracking. The inner surface is treated with a phosphate coating to prevent rust caused by condensed moisture, while the outer surface features a powder-coated finish (epoxy resin) that resists corrosion from road salt, rain, and industrial dust.

End Caps & Valves: The top/bottom end caps are made of high-strength cast iron (HT200) or aluminum alloy (ADC12), providing robust sealing with the cylinder body via O-ring gaskets (made of nitrile rubber NBR for oil and heat resistance). Pressure relief valves and drain valves are constructed from brass or stainless steel (304), ensuring wear resistance and reliable operation in extreme temperatures (-40°C to 80°C).

Mounting Brackets: Fabricated from stamped steel with a zinc-plated finish, offering strong load-bearing capacity to secure the cylinder to the chassis and absorb vibration during vehicle operation

The assembly incorporates multiple safety-focused design elements to protect the Dongfeng GX’s air brake system:

Pressure Relief Valves: Each chamber is equipped with a factory-calibrated pressure relief valve that automatically releases excess air if pressure exceeds 1.2 MPa—preventing over-pressurization and cylinder damage, while safeguarding downstream components (e.g., brake valves, air lines).

Manual Drain Valves: A 1/4" ball valve at the bottom of each chamber allows easy removal of condensed moisture (a byproduct of compressed air). Regular draining prevents internal rust, valve freezing (in low temperatures), and contamination of the air brake system—extending the assembly’s service life.

Pressure Gauge Ports: Standard 1/8" NPT ports on each chamber enable installation of pressure gauges, allowing drivers/technicians to monitor air pressure in real time and detect anomalies (e.g., slow pressure buildup) early

This dual chamber air storage cylinder assembly meets global commercial vehicle safety standards, including China’s GB 150 (Pressure Vessels Standard), ISO 4081 (Automotive air brake system components), and ECE R13 (United Nations Economic Commission for Europe regulations on braking systems). Each unit undergoes rigorous pre-shipment testing:

Hydrostatic Pressure Test: Subjecting the cylinder to 1.8 MPa (1.5 times maximum working pressure) for 30 minutes to check for leaks, deformation, or weld failure.

Air Tightness Test: Pressurizing the assembly to 1.0 MPa and submerging it in water for 10 minutes—no air bubbles are allowed, ensuring a leak-proof seal.

Material Performance Test: Verifying steel hardness (HB 100-130), coating adhesion (cross-cut test grade ≥ 4B), and valve operation (10,000+ open/close cycles without failure).

Environmental Test: Exposing samples to salt spray (1,000 hours), high-temperature (80°C for 200 hours), and low-temperature (-40°C for 200 hours) conditions to validate corrosion resistance and structural stability.

The assembly is backed by a manufacturer’s warranty (typically 24-36 months), providing customers with confidence in its reliability for Dongfeng GX’s heavy-duty operating conditions