Dual Air Brake Chamber (Spring Brake Chamber)
JIUZHOU Mechanical
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Dual air chamber
Model Number:T30
The dual air chamber consists of two separate sections:
• Service chamber: activated during normal braking
• Spring chamber: provides parking brake force when air pressure is released
This dual structure ensures reliable braking performance even in emergency or parked conditions.
Applications
• Semi trailers
• Truck braking systems
• Heavy-duty transport vehicles
• Logistics fleets
Why Choose Our Brake Chambers？
Our dual air brake chambers are designed to provide maximum safety and durability. With advanced spring brake technology, they ensure reliable braking performance under all operating conditions.
1.Combined Service & Parking Brake
Integrates a service chamber and a spring (parking/emergency) chamber in one unit, providing both daily braking and parking protection with fewer components.
2.Strong Braking Force for Heavy Loads
Dual-chamber design delivers higher output force, ensuring stable and powerful braking for heavy-duty trailers, long-distance transport, and steep terrain.
3.Automatic Emergency Braking (Spring Brake Safety)
If air pressure drops or fails, the built-in heavy spring automatically applies the brake, preventing vehicle roll-away and improving overall safety.
4.Durable Construction & Long Service Life
Reinforced steel housing, corrosion-resistant coating, and high-strength diaphragm ensure reliable performance under harsh road conditions and extended operation cycles.
What Is a Dual Air Brake Chamber
A dual air brake chamber, also known as a spring brake chamber, is a key component in trailer air brake systems. It combines both service braking and parking braking functions, providing enhanced safety and control.
| Single chamber model and specifications | |||||||
| Item NO. | Stroket | Push rod thread length | Push rod thread | Air nozzle thread | Installation screw thread | Angle between clamp and installation screw | |
| T9 | 44.5 | 130±3 | 1/2″-20UNF | 1/4″-18NPTF | 7/16″-14UNC | 45 | |
| T12 | 44.5 | 130±3 | 1/2″-20UNF | 3/8″-18NPTF | 7/16″-14UNC | 45 | |
| T16 | 57 | 160±3 | 1/2″-20UNF | 3/8″-18NPTF | 7/16″-14UNC | 135 | |
| T20 | 57 | 200±4 | 5/8″-18UNF2A | 3/8″-18NPTF | 5/8″-11UNC2A | 45 | |
| T20MB | 57 | 200±4 | M16*1.5 | M16*1.5 | M16*1.5 | 45 | |
| T20L | 76 | 237±5 | M16*1.5 | M16*1.5 | M16*1.5 | 45 | |
| T24 | 64 | 206±4 | 5/8″-18UNF2A | 3/8″-18NPTF | 5/8″-11UNC2A | 45 | |
| T24MB | 64 | 209±4 | M16*1.5 | M16*1.5 | M16*1.5 | 45 | |
| T24L | 75 | 200±3 | M16*1.5 | M16*1.5 | M16*1.5 | 0 | |
| T24LS | 80 | 186±3 | 5/8″-18UNF2A | 3/8″-18NPTF | M16*1.5 | 45 | |
| T30 | 64 | 255±4 | 5/8″-18UNF2A | 3/8″-18NPTF | 5/8″-11UNC2A | 45 | |
| T30MB1 | 64 | 255±4 | M16*1.5 | M16*1.5 | M16*1.5 | 45 | |
| T30EY2 | 64 | 190±3 | 5/8″-18UNF2A | 3/8″-18NPTF | 5/8″-11UNC2A | 45 | |
| T30MB | 64 | 50 | M16*1.5 | 3/8″-18NPTF | M16*1.5 | 45 | |
| T30MY | 64 | 50 | M16*1.5 | 3/8″-18NPTF | M16*1.5 | 45 | |
Key Features
• Combined braking functions (service + parking)
• Enhanced safety performance
• Stable and reliable braking force
• Durable construction for heavy-duty use
• Suitable for modern trailer systems
Dual vs Single Air Brake Chamber
Feature Dual Air Chamber Single Air Chamber
Structure Dual chamber Single chamber
Functions Service + Parking Service only
Safety Higher Standard
Application Advanced systems Basic systems
Mechanical suspension
Air suspension
Landing gear
Whell rim
Bake air chamber
Brake Kit
Leaf spring
Container lock
American type axle
German type axle
HDB axle
Spoke type axle
Steering axle
Agricultural axle
Oil lubricated axle
