Series 21 – Teflon Bellow Seal
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- Series 21 – Teflon Bellow Seal
Series 21 – Teflon Bellow Seal Overview
Type : 21C & 21R
SERIES 21C and 21R are designed for extremely corrosive chemicals, including concentrated acids and salts, strong oxidising and reducing agents, and chemically active organic compounds. All components which come in contact with the liquid being sealed are made of chemically inert material. Metallic components clamping ring and springs are located outside the pump stuffing box.
Type : 21C
In this seal type Glass filled PTFE face is composite moulded with highly flexible PTFE bellows.
Type : 21R
It is a seal similar to Type 21C in design with replaceable seal ring. This permits easy removal and replacements of the seal ring, a cost saving feature. In this type different face materials can be used to handle a wide range of corrosive and abrasive liquids.
Product Details
Engineered to perform in highly corrosive environments — built for durability and precision.
Applications
- For highly corrosive clear or abrasive liquids
- Ideal for low to medium pressure operations
MOC for Seal Faces
Rotary: Glass Filled Teflon, Silicon Carbide, Carbon
Stationary: Silicon Carbide, Ceramic
Design
- All contact parts are non-metallic
- Externally mounted design
- Multiple spring arrangement for uniform loading
- Independent of direction & rotation
Hardware Material
Compression Unit: Glass Filled Teflon
Spring: SS 316 / Hast Alloy ‘C’
Thrust Ring: SS 316
Allen Bolt: SS 316
Clamp: SS 316
PTFE Bellow
