20M and 20R1

PTFE Bellows Seals Single Acting, Independent of Direction of Rotation 
Seal series 20M & 20R1 
Standard Style
Face Materials
20M : GFT/Ceramic (99.5%) 
20R1 : GFT/Ceramic (99.5%)
Silicon Carbide / Ceramic (99.5%)

Metal Parts

AISI 316 
Springs : Hastelloy-C
Secondary Seals

bullet   PTFE


bullet   Extremely corrosive services.

Seal Characteristics

bullet   Single acting
bullet   Outside mounted 
bullet   Independent of direction of rotation
bullet   Balanced
Operating Limits
Shaft Diameterd1:  18 … 100 mm 
Pressure pp:  10 bar 
Temperaturet:  -45 … +120 o C 
Velocityv:  10 m/s. 

Series 20M & 20R1 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. 
Series 20M : In this seal type Glass filled PTFE face is composite moulded with highly flexible PTFE bellows. 
Series 20R1 : It is a seal similar to Type 20M 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.


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