Brake Chambers

UltraLife-Disc UL-Disc with HOT (High Output Technology): The Ultimate in Air Disc Brake Performance & Durability

TSE innovated the double-diaphragm HOT (High Output Technology) chamber used worldwide for disc brake applications. Now TSE has taken disc brake actuators to the next level with the ultimate in product durability and corrosion resistance.


The UltraLife-Disc Characteristics

  • Full Immersion E-coating
    Full immersion electro-deposition coating inside and out and an exclusive powder coating finish for the most durable corrosion protection in the industry.

  • Unique Port Adapter
    UL-Disc features a unique composite port adapter which reduces profile size and allows for easy air connection.

  • Patented Bushing Assembly
    Patented bushing assembly provides center seal that traps lubricant for extended service, reducing center section leaks and brake drag.

  • Premium Diaphragm
    Premium diaphragms feature high quality contaminant resistant rubber reinforced with nylon fabric tested well beyond the toughest industry specifications.

  • All Steel Design
    All steel design provides durable, air tight center section that virtually eliminates leaks, structural failures and prevents galvanic corrosion.

  • High Vibration Base
    TSE designed High Vibration "HV" mounting base reduces vibration for longer life standard on UltraLife products.

  • Innovative Design
    UL-Disc features a 100% steel inverted spring bottom housing that reduces both spring coil-to-coil contact and spring coil-to-spring housing contact. The all-steel design provides a durable, air-tight center section that virtually eliminates leaks and structural failures, while the recessed pressure plate allows for a shorter and more compact chamber.

  • Premium Quality
    TSE is an ISO 9001 and KBA certified company. As an OEM premium direct fit and aftermarket replacement, UL-Disc is the premium brake for your heavy-duty disc brake trucking application.

  • Tough Main Spring
    UltraLife main spring adds a proprietary base coating in addition to TSE's multi-stage coating system for the ultimate in corrosion protection. Tested to double SAE standards, UL-Disc’s main spring actually exceeds SAE dry cycle testing requirements in a slurry environment.

  • Complete In-House Testing
    UL-Disc brake actuators undergo rigorous in-house testing in TSE’s comprehensive testing lab. Tests include variable pressure cycle testing, vibration testing, hot cell cycle testing, salt spray testing, cold cell leak/operational testing and slurry testing

  • Superior Corrosion Resistance
    With TSE’s exclusive in-house process, all parts of the UL-Disc actuator receive a multi-stage pre-treatment prior to e-coat and an extra layer of polyester powder coating protection.


6 years

Options Table

View Options Table
Option Number CategoryDescriptionCaged
1816HTND2UL-4312High Output Technology (HOT) Air Disc BrakeFor 1816 Piston Or 1824 Double DiaphragmY
1824TLD2HUL-4249High Output Technology (HOT) Air Disc BrakeFor 1816 Piston Or 1824 Double Diaphragm, 2.5" stroke, road sideY
1824TLD2HUL-4250High Output Technology (HOT) Air Disc BrakeFor 1816 Piston Or 1824 Double Diaphragm, 2.5" stroke, curb sideY
2016HTND2UL-4313High Output Technology (HOT) Air Disc BrakeFor 2016 Piston Or 2024 Double DiaphragmY
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