Polymer Type | Usage | Attributes |
Natural (NR) | Flapper valves, large pipeline gaskets | Abrasion Resistance |
Synthetic Rubber (SBR) | large gaskets | Abrasion Resistance, inexpensive |
Buna-N (NBR) | O-rings, valves seats, pump impellers, check balls | Resistance to petroleum solvents |
Ethylene-propylene (EPDM) | O-rings, valves seats, flat gaskets, pond liners, check balls | Chemical resistance, inexpensive |
Isobutylene Isoprene (IIR) | Diaphragms | Oxidant resistance |
Fluorocarbon (FKM) | O-ring, chemical feed pumps | Superior chemical resistance |
Neoprene (CR) | Pump impellers, valve seats, chemical feed pumps | Excellent weathering character, resistance to gas and oils |
Hyplon (CSM) | Reservoir liners | Ultraviolet resistance |
Silastic (Si) | High temperature applications |
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