Commonly Used Sealing Materials In Chemical Mixing Equipments | JCT Machinery

1. PTFE (Polytetrafluoroethylene)

Features

• Excellent chemical stability and corrosion resistance.
• Wide operating temperature range (-200℃ to 260℃).
• Low friction coefficient and good self-lubricating properties.

Application

• Suitable for static and dynamic seals of reactors and sigma mixers, especially when dealing with strong acids, strong alkalis and organic solvents.
• Commonly used for mechanical seals, valve seals, pipeline flange seals, etc.

2. Viton (Polyfluororubber)

Features

• Excellent high temperature resistance (can withstand up to 200℃).
• Good oil resistance, solvent resistance and chemical resistance.

Application

• Suitable for environments with high temperature and corrosive media, such as double planetary mixers and reactors seals.
• Commonly used for O-rings, gaskets and oil seals, etc.

3. EPDM

Features

• Good heat resistance, ozone resistance and aging resistance.
• Excellent acid and alkali resistance.

Application

• Suitable for acid and alkali resistant sealing parts in kneading machines and reactors.
• Commonly used for gaskets, O-rings and hoses.

4. Graphite Packing

Features

• Excellent high temperature resistance (can withstand up to 450℃).
• Good self-lubricating properties and corrosion resiistance.

Application

• Suitable for sealing in high temperature and high pressure conditions, such as packing seals of reactors and high temperature sigma mixers and vertical kneaders.
• Commonly used for valve packing and mechanical seals.

5. Metal Sealing Materials

Features

• Applicable to extreme high temperature and high pressure environments.
• Can withstand severe mechanical stress.

Application

• Commonly used for metal ring seals, metal gaskets, etc. in reactors, high-pressure sigma mixers and vertical kneaders.

6. Silicone Rubber

Features

• Good high and low temperature resistance (-60℃ to 200℃).
• Non-toxic and odorless, suitable for food and pharmaceutical industries.

Application

• Applicable to food-grade and pharmaceutical-grade seals in double planetary mixers, sigma mixers, vertical kneaders and reactors.
• Commonly used for gaskets, O-rings and sealing strips, etc.

7. Polyurethane

Features

• Excellent wear resistance and mechanical strength.
• Good oiil resistance and aging resistance.

Application

• Applicable to environments requiring high wear resistance and oil resistance, such as dynamic seals of kneaders and reactors.
• Commonly used for seals, gaskets and elastomers.

8. Aramid Fiber

Features

• Excellent wear resistance and mechanical strength.
• Good chemical resistance and thermal stability.

Application

• Applicable to seals in high temperature and high pressure conditions, such as packing seals of reactors and kneaders.
• Commonly used for packing rings and gaskets.