TYPE TBT

A "Teflon bellows" seal, also known as a PTFE bellows seal, is a type of mechanical seal that uses flexible PTFE bellows as the secondary sealing element. This design is highly valued for its superior chemical resistance and is often chosen for applications involving highly corrosive or aggressive fluids. The primary reason for choosing a PTFE bellows seal is its outstanding resistance to almost all chemicals. PTFE is a highly inert material that can withstand a wide range of corrosive fluids, including strong acids and alkalis, making it an ideal choice for the chemical and pharmaceutical industries. PTFE bellows seals can operate effectively in a wide temperature range, from cryogenic to high temperatures, where traditional elastomer bellows or O-rings would fail or degrade. The flexible PTFE bellows design prevents the seal from "hanging up" due to solids or crystallization from the process fluid. This is a common issue with other seal types and can lead to seal failure, but the PTFE design ensures reliable performance.

• Pressure: typically ranging from vacuum up to 6 bar (87 psi). Some balanced versions can handle up to 35 bars..
• Non-Pusher Type.: Yes
• Non-Metallic Design: Yes
• Equivalent to: This seal is considered an equivalent to John Crane Type 10T/10R and Flowserve Chemiepac 970