Extranet Lidering

Technical Information

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Contact surfaces
(position I and II)

A Antimony-impregnated carbon
B Resin-impregnated carbon
B2 Resin-impregnated carbon
B3 Pure non-impregnated carbon
B5 Hot pressed carbon
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
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
V Alumina oxide 99,5%
V2 Alumina oxide 95%
X Steatite
Y Glass-filled PTFE
Y1 PTFE-graphite

Secondary seals
(position III)

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®)
G Graphite

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)