T24 Rubber Diaphragm
- YiDa
- Dalian,China
- 15-20 days
- 2 billion/year
1. Modified NBR and NR base materials especially through the use of low-volatility, cold-resistant plasticizers.
2. Perform dynamic low-temperature flexing tests at -40°C like the ones described in ASTM/ISO standards or according to manufacturer's validation procedures to ensure that the diaphragm does not become hard or brittle due to extreme cold.
3. Physically, the air brake chamber diaphragm still maintains its mechanical strength even at very high temperatures.
Since it is the main safety component, the number one concern of buyers is the possibility that a fatigue crack will be initiated in the bending area as a result of the rubber becoming brittle or aging. Such cracks can appear due to extremely cold temperatures (e.g. -40°C during the winters in the northern regions) or the heat that is generated by the continuous braking. A crack that extends through the fabric reinforcement and results in an air leak will make the brake chamber pressure drop very fast, which could lead to the failure of the brakes or the parking spring getting locked; such situations seriously risk a major road accident or very expensive roadside assistance.
Solution:
Strong chemical bonding: We don't just embed the fabric in rubber, but go for a special dipping method that makes a stable chemical bonding interface between the reinforcing fibers and rubber molecules during the compression molding and vulcanization stages. This structurally reduces stress-concentration cracking that happens due to "fabric-rubber delamination".
Rubber diaphragm introduction:
The T24 rubber diaphragm is a fabric-reinforced rubber diaphragm which is specially made for heavy-duty commercial vehicle brake chambers (in short, brake diaphragms). It is one of T-series standard specifications (T9/T12/T16/T20/T24/T30/T36), and is compatible with T24-type brake chambers.
Being a main force-transmitting and sealing element in pneumatic braking systems, it provides high pressure resistance, fatigue resistance, and lasts for a long time. It is mainly used in rear-axle service brake chambers and spring brake chambers for heavy-duty trucks, trailers, and buses.
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Brake chamber diaphragm specifications:
| Attribute Name | Details |
| Processing Service | Cutting/Molding |
| Brand Name | Yida/EDA |
| Model Number | As per client's drawing |
| Material | NBR (Nitrile Rubber): Oil and wear-resistant; suitable for general operating conditions; temperature range: -40°C to 120°C. |
| NR (Natural Rubber) + Fabric Reinforcement: Highly elastic and fatigue-resistant; suitable for high-frequency braking. | |
| EPDM: Resistant to aging and weathering; suitable for outdoor or hot and humid environments. | |
| FKM (Fluororubber): Oil and high-temperature resistant; an option for specialized operating conditions. | |
| Hardness Range | Shore A 60±5 (customizable) |
| OEM/ODM Service | Material (NBR/EPDM/FKM) and dimensions adjustable |
| Color | Optional |
| Structure | Air brake diaphragm made of a rubber-fabric composite (integrally molded) |
| Operating Temperature | NBR (Nitrile Rubber): -40°C to +120°C. |
| NR (Natural Rubber) + Fabric Reinforcement: -50°C to +80°C. | |
| EPDM: -45°C to +150°C. | |
| FKM (Fluororubber): -20°C to +250°C. | |
| Shape | Styles: Continuous rolls, round, square, custom shapes, and gaskets with holes (customizable). |
| Size | Standard models: T24 (standard), T24L (long stroke). |
| Operating Pressure | 1. NBR |
| Working pressure: 0.6 – 1.0 MPa (approx. 87 – 145 PSI) | |
| Burst pressure: ≥ 2.5 MPa | |
| 2. NR (Natural Rubber) + Fabric reinforcement | |
| Working pressure: 0.6 – 1.0 MPa | |
| Burst pressure: ≥ 2.8 MPa | |
| 3. EPDM (Ethylene Propylene Diene Monomer) | |
| Working pressure: 0.6 – 1.0 MPa | |
| Burst pressure: ≥ 2.2 MPa | |
| 4. FKM (Fluoroelastomer) | |
| Working pressure: 0.6 – 1.0 MPa | |
| Burst pressure: ≥ 3.0 MPa | |
| Service Life | Withstands over 1 million flex cycles; resistant to aging and ozone. (Achieves a dynamic flex life of over 1 million cycles under specified testing conditions.) |
| Tolerance Standard | As per customer design/requirements |
| Quality | 100% inspection |
| Design Format | 2D & 3D drawings available |
| Performance Characteristics | High-Pressure Toughness: Maintaining shape under high pressure, the fabric-reinforced design not only provides impact and burst resistance but also features toughness. |
| Zero-Leakage Sealing: Precision molded to fit the air chamber cavity, effectively preventing brake air pressure loss. | |
| Fatigue Resistance & Durability: Withstands over a million cycles without cracking, reducing the frequency of replacements. | |
| Media Compatibility & Stability: Resistant to compressed air, water vapor, lubricating oil mist, and common road contaminants; resists swelling, hardening, and aging. | |
| Universal Fit: Compatible with mainstream T24 brake chambers (e.g., Bendix, Steyr, Howo, etc.). | |
| Main Application Areas | Heavy-duty trucks / Trailers: Rear axle T24 brake chambers and spring brake chambers (service/parking brakes). |
| Warranty | Buses / Coaches: Pneumatic brake system sealing components. |
| Production Capacity | Construction machinery: Diaphragms for pneumatic actuators of corresponding specifications. |
| Lead Time | Warranty: Under recommended storage conditions (temperature <30°C, humidity <70%, away from direct light), unopened products are eligible for free replacement if failure due to material aging (not caused by human error) occurs within 3 years of delivery and is confirmed upon inspection. Failures resulting from improper installation or use outside specified parameters are not covered by the warranty. |
| Packaging | Packed in a PE bag, then placed in a carton |
| Selling Units | Single item / 1 pc |
| Single Package Size | As per the buyer's request |
| Single Gross Weight | As per the buyer's request |
| Shipping Method | By sea, air, or express |
| Port of Loading | Dalian Port or as per the buyer's request |
| Certificates | IATF 16949 Automotive Quality Management System |
| AS9100D Aerospace Quality Management System | |
| ISO 14001 | |
| ISO 9001 | |
| RoHS 2.0 REACH |
Manufacturing Center:
Rubber Compounding & Vulcanization: Using more than 1,000 tested formulas and raw rubber from abroad, together with a barcode-based system for error prevention, we deliver the same physical characteristics from batch to batch and longer product service life.
Precision Mold Making: Our molds are made by machining centers from Japanese Makino, capable of holding tolerances within ±0.005mm to accommodate the dimensional precision demands of complicated sealing parts.
Automated Molding: Totally automated compression and injection molding methods not only bring about excellent product repeatability but also increased production efficiency and output on a large scale.
Rubber compounding
Vulcanization
Mold
Injection molding
Testing Center:
Material Analysis: Continually comply with CPK and MSA testing requirements while also performing thorough instrument analyses of major physical properties including hardness, tensile strength, and compression set.
Automated Full Inspection: Deployment of an AI-driven CCD vision system for working out a full, manually unattended, automated check of all flash, material shortages, shape deviations, and surface impurities combined with achieving defect-detection capabilities at the micron level.
Materials analysis equipment
Automatic inspection equipment
About Yida:
Yida's journey towards craftsmanship began in the year 1993. We started our constant expansion perfectly from our headquarters in Dalian into Japan and Vietnam, and have now achieved the most efficient production and supply network worldwide with our presence everywhere.
Scope and Capability: Currently, we have a workforce of 450 highly trained personnel. Besides, we run a state-of-the-art, smart manufacturing plant covering an area of 37,000 square meters and are capable of producing more than 300 tons on a monthly basis.
R&D Capability: With a repository of approximately 1,000 accurately tested formulas, we are capable of unraveling complex technical issues.
Global Presence: The advanced sealing solutions made by Yida are some of the most commonly used and trusted products in industrial markets worldwide, not only in the US, Germany, Russia, Japan, France, and Saudi Arabia but other countries also.
Quality Certifications:
A deep commitment to quality defines Yida. Beyond standard ISO 9001 and ISO 14001 certifications, we hold the dual "passports" to high-end manufacturing:
Industry Standards: We strictly adhere to IATF 16949 (automotive industry) and AS9100D (aerospace) quality management systems (Certificate No.: 19318).
Multi-dimensional Compliance: The entire product line adheres to RoHS 2.0 environmental standards and offers NSF/WRAS certification upon request, ensuring safety for food-grade, specialized flame-retardant, and environmentally sensitive applications.
Serving Global Fortune 500 Companies:
Yida continuously offers reliable products and services to the worldwide industrial manufacturing, automation control, new energy, electrical equipment, and automotive component sectors, as a result of its established long-term cooperation with a number of globally well-known firms.
Our clients' industries span automobile electronics, industrial automation, smart manufacturing, new energy, power equipment, and fluid control areas, to name a few. They include Delphi Technologies, Alpine Electronics, Nidec, Siemens, Panasonic, Omron, SMC Corporation, CATL, China Electric Equipment Group, and Rongke Power.
We provide an extensive 3-year warranty for every order entrusted to us：
Warranty Terms: In case the products are stored according to the specified conditions (temperature <30°C, humidity <70%, kept sealed and away from light), Yida guarantees a full and free replacement within three years from the delivery date when a material aging or failure happens that is not caused by human error.
Exhibition Highlights:
2025 Dalian International Industrial Expo
Presenting our "Digital Sealing Engine" as the main feature, Yida showcased the full range of its capabilities in tackling the most challenging conditions of intelligent manufacturing. In addition, we had a discussion with 900 other industry leaders at the venue about establishing deep supply chain collaboration.
2025 Shanghai Long-Duration Energy Storage Technology Exhibition
With the "Dual Carbon" strategy in mind, we came out with a new generation of sealing matrices that are not only resistant to high temperature, but also highly corrosion-resistant and durable. Our targeted application of this product line is energy storage systems of the next generation and the goal is to solve the technical problems of long-term airtightness in very difficult environments.
