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1>Product Introduction of Truck Brake Systems Truck Trailer brake chamber T30 manufacturer truck brake cylinder direct sales
The T30 Air Brake Chamber is a standardized type of service brake chamber widely used in commercial trucks, trailers, and buses. It converts compressed air pressure into mechanical force to activate foundation brakes (typically S-cam drum brakes). The "T30" designation follows the SAE J1819 standard, indicating its 30 square inches (~194 cm²) effective diaphragm area - a key metric for force output.
Force Generation:
Compressed air (typically 80-130 psi / 5.5-9 bar) acts on the diaphragm, pushing the push rod outward.
Force output = Air pressure × Effective area (e.g., 100 psi × 30 in² = 3,000 lbf / ~13.3 kN).
Brake Activation:
Push rod movement rotates the slack adjuster, forcing brake shoes against drums.
Fail-Safe Spring Option:
T30 chambers are typically service-only. For parking/emergency brakes, paired with a Type 30 spring brake actuator (e.g., T30/30).
Robust Design:
Cast aluminum or steel housing, corrosion-resistant diaphragm, and heat-treated push rod.
2> Product Specification of Truck Brake Systems Truck Trailer brake chamber T30 manufacturer truck brake cylinder direct sales
| Parameter | Specification |
|---|---|
| SAE Size Designation | T30 |
| Effective Area | 30 in² (194 cm²) |
| Max. Operating Pressure | 130 psi (9 bar) |
| Stroke Length | Standard: 2.0" (51 mm) Max. Adjustable: 2.25" (57 mm) |
| Push Rod Force (@100 psi) |
3,000 lbf (13.3 kN) |
| Mounting Bolt Pattern | 4-bolt: 3-7/8" (98.4 mm) square |
| Port Thread Size | 1/4" NPT or 1/2" NPT (inlet/exhaust) |
| Temperature Range | -40°F to +250°F (-40°C to +121°C) |
| Compliance | FMVSS 121, SAE J1819 |
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