| 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%) Carbon-R/Ceramic(99.5%) Metal Parts AISI 316 Springs : Hastelloy-C Secondary Seals  PTFEApplications Extremely corrosive services.Seal Characteristics Single acting Outside mounted Independent of direction of rotation Balanced | |
| Operating Limits | ||
| Shaft Diameter | d1 | : 18 … 100 mm |
| Pressure p | p | : 10 bar |
| Temperature | t | : -45 … +120 o C |
| Velocity | v | : 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.
