Analysis of the application of non-metallic gaskets in the industrial field

1. What is a non-metallic gasket?

Non-metallic gaskets are sealing elements made of various non-metallic materials and are widely used in sealing joints of industrial equipment. Compared with metal gaskets, non-metallic gaskets have better sealing performance, lighter weight and more economical cost.

Core characteristics and advantages:

Excellent sealing performance: compression rebound rate can reach 30-60%

Strong chemical stability: acid and alkali resistance range pH 0-14

Wide temperature adaptability: -200℃ to +300℃ continuous working temperature

Economic and environmentally friendly: the cost is only 1/3-1/5 of metal gaskets, and can be recycled

2. Main material types and characteristics

• Rubber gaskets

NBR nitrile rubber: excellent oil resistance, suitable for hydraulic systems (operating temperature -30℃~+100℃)

EPDM ethylene propylene diene monomer: strong weather resistance, commonly used in outdoor equipment (ozone resistance >100pphm)

FKM fluororubber: chemical corrosion resistance, the first choice in the chemical industry (strong acid and alkali resistance)

• Fiber reinforcement

Asbestos-free compressed fiber: tensile strength> 10MPa, ideal choice to replace asbestos

Graphite reinforced gasket: thermal conductivity of 50-150W/m·K, suitable for high temperature conditions

Ceramic fiber gasket: temperature resistance up to 1400℃, used in special high temperature environment

• Polymer-based gasket

PTFE polytetrafluoroethylene: friction coefficient is only 0.04, the strongest chemical inertness

PEEK polyetheretherketone: high mechanical strength, good creep resistance

UHMWPE ultra-high molecular polyethylene: wear resistance is 7 times that of carbon steel

Table: Performance comparison of main non-metallic gasket materials：

3. Solutions to Common Problems