Used Materials – The right Selection for an optimal Solution

Corrosion-resistan Metal Materials

Material Material
Pitting Index
Exemplary Application
Stainless Steel 1.4404 23,0 - 28,0 Standard material, for ex. for waterworks, biogas plants
  1.4571 25,0 Pharmaceutical industry with low delta-ferrite content
Duplex 1.4462 30,0 - 38,0 Purified steam and sterile steam applications
  1.4539 34,0 - 40,0 Pressure reducing valves for sea water on jack-up vessels
Super Duplex 1.4410 35,0 - 42,0 Bleeding valve for sea water cooling lines
  1.4501 37,0 - 44,0 Vacuum breaker on oil platforms
Cronifer 1925hMo 1.4529 41,0 - 48,0 Bleeding valve for corrosive chemicals
245 SMO® 1.4547 42,0 - 48,0 Pressure reducing valve for cooling water aboard ships
Hastelloy® C-4 2.4610   Back pressure regulator in the chemical industry
Titanium 3.703   Hydrant valves in the fire fighting systems on FPSO vessels


Metal Materials

Material Material No. DIN European Standard
Grey cast iron 0.6025 GG-25 EN-JL1040 A23+-B
Nodular graphite cast iron 0.7040 GGG-40 EH-JS1030 A536 60-40-18
Cast steel 1.0619 GS-C 25 EN 10213-2 A216 WCB
Cast stainless steel 1.4408 G-X 6CrNiMo 18 10 EN 10283 A351 CF811
  1.4581 GX5CrNiMoNb19-11-2 EN 10213-4 316Cb
Steel 1.0038 RST 37-2 EN 10025 A283-C
C-Steel 1.0038 C22.8 EN 10273 A105
Heat-resistant steel 1.7380 10 CrMo 9-10 EN 10216-2 A199
  1.7357 GS-17 CrMo 55 EN 10293 A217 WC6


Seal Materials

Material Working Temperature
Typical Application Area
MVQ, Silicone resistant up to 100°C | temporary steam sterilisation up to 130 °C

high thermal capacity | good resistance to cold for foodstuffs | dielectric properties | good resistance to alcohols

EPDM  -40°C up to140°C | steam sterilisation up to 130 °C

good resistance to swelling with: diluted inorganic and organic acids, bases, polar organic media, media with an oxidising effect, brines and ketones in hot water and steam up to 130 °C

FPM (acc. to DIN ISO)
FKM (acc. to ASTM)
 -20°C up to 130°C | temporary steam sterilisation up to 140°C

good resistance to swelling with: mineral oils, vegetable and animal oils fats (also special additives) petrols

NBR, Perbunan® -30°C up to 80 °C | temporary steam sterilisation up to 130°C

good resistance to swelling with: aliphatic hydrocarbons (such as propane, butane, petrol, mineral oils) fats on mineral oil basis

PTFE, Teflon® physiologically harmless up to 200 °C | -200°C up to 260°C smooth and repellent surface, thus no adhesion of residues, better chemical resistance than with all elastomers, hardly combustible
CR, NR -30°C up to 90°C

flame resistant, resistant to welding, weather resistant, resistant to deterioration, resistant to saline waters, frequent use in cooling agents

FKM / FFPM, Kalrez®, ISOLAST® -20°C up to 275°C | with special compounds -30°C up to 325°C

very good thermal or chemical resistance

(to very aggressive media)
FEPM -10°C up to 200°C high resistance especially to amine-containing additives and corrosion inhibitors
VA, Graphit -200°C up to 500°C

use at high temperatures | for corrosive media | not sensitive to scratches, very high resistance to chemicals

EU, EladurTM -20°C up to 80°C

mostly used with gases, e.g. CO2, nitrogen, air, also used with water | high tear resistance, good thermal properties


Weiterführende Informationen

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guidebook "Self-acting Control Valves"


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