Technical Information
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Contact surfaces
(position I and II)
| SYNTHETIC CARBONS | |
| A | Antimony-impregnated carbon |
| B | Resin-impregnated carbon |
| B2 | Resin-impregnated carbon |
| B3 | Pure non-impregnated carbon |
| B5 | Hot pressed carbon |
| METALS | |
| E | Chromium steel; AISI 420 (1.4021 ; 1.4028) |
| F1 | Nickel-chromium steel; AISI 431 (1.4057) |
| G | Nickel-chromium-molybdenum steel; AISI 316 (1.4401) |
| D | Duplex stainless steel (1.4462 ; 1.4162) |
| Z | Nickel-chromium-molybdenum steatite steel |
| C | Brass |
| CARBIDES | |
| U | Tungsten carbide with welded / inserted nickel |
| U1 | Solid tungsten carbide with nickel |
| Q1 | Sintered silicon carbide with no free silicon |
| Q2 | Sintered silicon carbide |
| Q6 | Sintered silicon carbide with carbon |
| CERAMIC MATERIALS | |
| V | Alumina oxide 99,5% |
| V2 | Alumina oxide 95% |
| X | Steatite |
| SYNTHETIC MATERIALS | |
| Y | Glass-filled PTFE |
| Y1 | PTFE-graphite |
Secondary seals
(position III)
| ELASTOMERS | |
| P | Nitrile butadiene rubber (NBR) |
| H | Hydrogenated nitrile butadiene rubber (HNBR) |
| N | Chloroprene rubber (CR) |
| E | Ethylene-propylene diene monomer (EPDM) |
| X | Ethylene-propylene diene monomer peroxide (EPDMPX) |
| S | Methyl-vinyl silicon rubber (MVQ) |
| V | Fluorocarbon (FKM or Viton® Rubber) |
| K | Perfluorocarbon rubber (FFKM) |
| M | Viton® Rubber coated with PTFE (FEP-FKM / FEP-MVQ) |
| A | Tetrafluoro-ethylene Propylene Rubber (TFE/P or Aflas®) |
| NON-ELASTOMERS | |
| G | Graphite |
| T | PTFE |
Springs and other metal parts
(position IV and V)
| E | Chromium steel; AISI 420 (1.4021; 1.4028) |
| F | Nickel-chromium steel; AISI 304 (1.4301) |
| F1 | Nickel-chromium steel; AISI 431 (1.4057) |
| G | Nickel-chromium-molybdenum steel; AISI 316 (1.4401) |
| G2 | AM350 nickel-chromium-molybdenum steel. AM350 |
| L | NIckel-chromium-molybdenum steel; AISI 316L (1.4404) |
| D | Nickel-chromium-molybdenum duplex stainless steel (1.4462) |
| M | Hastelloy® C276 |
| M2 | Inconel® 718 |
| M4 | Monel® 400 |
| B | Brass |
| G3 | Alloy® 20 |
| G4 | 316Ti (1.4571) |