Automotive Air Pump PTFE Y-Seal DYH

Automotive Air Pump Y-Seal DYH Product Case ? Key Technologies of Seal Material Modification Explained! dshmfcom

As a core component of the vehicle braking system, the sealing performance of the automotive air pump directly affects driving safety. This article focuses on the key technical characteristics of the Automotive Air Pump Y-Seal DYH, analyzing the reliability of this seal under extreme temperature conditions ranging from -100°C to 260°C and high-pressure conditions of 20MPa, based on the performance of modified PTFE material and actual test data.

?I. Material Characteristics: Breakthrough Advantages of Modified PTFE?

Automotive Air Pump Y-Seal DYH uses graphene-modified polytetrafluoroethylene (PTFE) material. Through nano-filling technology, the tensile strength is increased to 28MPa (tested according to ASTM D638 standard), which is three times higher than conventional PTFE. Low-Temperature Elasticity Test shows that at -100°C, the compression rebound rate of this seal remains at 82%, far exceeding the industry standard of 40% for ordinary rubber seals. Key Data indicates that the modified PTFE material exhibits a thermal weight loss rate of <0.5%/100h in high-temperature air at 260°C (ISO 247 standard), which is the core guarantee for its ability to perform in high-temperature conditions of automotive air pumps.

?II. Structural Design and Sealing Mechanism?

Automotive Air Pump Y-Seal DYH adopts an asymmetric lip design:

· 75° Main Sealing Lip: Under 20MPa pressure, it generates a contact stress gradient distribution, with the measured sealing interface pressure reaching 15-18MPa, ensuring zero leakage.

· Dual Redundant Secondary Lip Structure: Equipped with a 0.2mm thick nickel-titanium alloy skeleton to compensate for axial wear clearance. After 100,000 cycles of testing, the leakage remains <0.01mL/min.

· Micro-Textured Surface: Laser-processed micro-dimples with a diameter of 30-50μm serve as oil reservoirs, stabilizing the friction coefficient within the range of 0.05-0.08.

?III. Validation Data Under Extreme Conditions?

Test reports from the China Automotive Technology and Research Center show:

· Temperature Shock Test: Automotive Air Pump Y-Seal DYH exhibits a volume change rate of only 1.2% during 100 rapid temperature cycles from -100°C to 260°, far below the industry limit of 5%.

· Dynamic Sealing Test: At a piston speed of 15m/s, the friction-induced temperature rise of this seal is controlled within 35°C, with no abnormal noise generated.

· Life Assessment: After 500 hours of pulsating pressure testing at 20MPa (frequency 2Hz), the lip wear is only 0.03mm, with an estimated actual service life of 80,000-100,000 kilometers.

Dongsheng Seals was established in 1992. For 32 years, it has focused on technological innovation in sealing, forming a doctoral team of over 10 members and building an industry-leading testing center equipped with dozens of high-speed and efficient production equipment. The company is certified under ISO9001, IATF, and others, holds over 10 national patents, has developed 235+ material formulas and 1,725+ selection schemes, and maintains an inventory of over 1 million products with 100,000+ models and specifications. As a leading enterprise in China's sealing industry, Dongsheng provides sealing system solutions for renowned companies such as Sany Heavy Industry, CNPC, BYD, and Gree. Guided by the philosophy of "Dongsheng Intelligent Manufacturing, Sealing Reliability," it continues to tackle technical challenges, with dshmfcom contributing to the development of China's industry.