Railroad Transportation

There are a wide variety of sealing products used in the transport industry and they play a vital role in ensuring the safety, reliability and efficiency of transport. Whether it’s a car, train, aeroplane or ship, seals are an integral part.

Seals materials

Rubber (NR, SBR, EPDM, etc.): with good elasticity and abrasion resistance, it is suitable for automobile tyres and seals.

Silicone rubber (VMQ): excellent high temperature resistance and weather resistance, suitable for seals in the engine compartment of automobiles.

Fluoroelastomer (FKM/Viton): excellent oil, chemical and high temperature resistance, suitable for aerospace and automotive engine seals.

Polyurethane (PU): high strength and abrasion resistance, suitable for seals in construction machinery and automotive drivetrains.

Polytetrafluoroethylene (PTFE): excellent chemical resistance, low coefficient of friction and non-adhesive, suitable for high-performance seals and bearings.

Types of seals

O-Rings: for static and dynamic seals, suitable for hydraulic and pneumatic systems in all types of transport.

Gaskets: used for flat sealing, such as automotive engine head gaskets, aircraft hatch sealing gaskets and so on.

Seals: used for door and window seals, such as automotive door seals, train compartment seals and so on.

Oil seals: used for sealing rotating shafts to prevent lubricant leakage, such as automobile engine crankshaft oil seals.

Dust cover: used to protect moving parts from dust and pollutants, such as automotive suspension system dust cover.

Seals design

Oil-resistant design: seals need to be able to resist the erosion of various lubricants and fuels.

Pressure-resistant design: Seals need to be able to maintain sealing performance under high pressure to prevent leakage.

Temperature-resistant design: seals need to be able to maintain stable performance in high or low temperature environments.

Wear-resistant design: seals need to have good wear resistance to adapt to high wear environment.

Seals manufacturing and processing

Precision machining: Seals need to be precision machined to ensure dimensional accuracy and surface finish to ensure sealing performance.

Surface treatment: The surface of seals may require special treatment, such as polishing, coating, etc., to improve corrosion resistance and wear resistance.

Cleaning and sterilisation: In some applications, seals require stringent cleaning and sterilisation processes to ensure sterility and contamination free.

Seals testing and validation

Oil Resistance Test: Seals are tested for oil resistance in simulated lubricant and fuel environments.

Pressure resistance test: Test the pressure resistance of seals in simulated high pressure conditions.

Temperature Resistance Testing: Testing the temperature resistance of seals in simulated high or low temperature conditions.

Abrasion resistance test: test the abrasion resistance of seals under simulated abrasion conditions.

Examples of seals applications

Automotive: Various rubber and plastic seals such as O-rings, oil seals, gaskets and seals are used.

Trains: Weather and abrasion resistant seals are used, such as door seals, window seals and brake system seals.

Aircraft: Use high performance seals such as Viton and silicone rubber seals for engines, hatches and hydraulic systems.

Marine: seals resistant to seawater corrosion, such as EPDM seals and stainless steel seals for hull seams and hatches.

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