GSR – Innovative Valve Technology

The respective application case is decisive for the type of valve used although the resistance of the materials to the operating medium also plays a significant role.
The selection of the material is primarily based on knowledge of the concentration, temperature and the level of pollution of the medium.
Other criteria are the operating pressure and the maximum volume because, similar to high temperatures, high pressures and flow velocities need to be taken into consideration when selecting the appropriate material.
All materials used in our valves, be it for the casing, seals or solenoids, are carefully selected according to the various application fields.
All information provided is non-binding and only for orientation purposes.
It cannot be used for the basis of guarantee claims.
Metallic materials for casings and inner parts |
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|---|---|---|---|
| Material | Material No. | DIN | Characteristics |
| Aluminium | 3.2162.05 | Al Si 8 Cu 3 | Aluminium-die cast for casings up to
PN16; for neutral media. |
| Stainless Steel | 1.4571 | X10 Cr Ni Mo Ti 18 | Austenitic high-alloy steel for magnet
stay tube and aggressive media. |
| Stainless Steel | 1.4301 | X 5 Cr Ni 18 9 | High alloy austenitic stainless steel
for internal valve parts and slightly aggressive media. |
| Stainless Steel | 1.4104 | X 12 Cr Mo S 17 | Corrosion-resistant ferritic (magnetisable)
stainless steel for e.g. magnet anchor and pole shoe, conditionally suitable
for aggressive media. |
| Stainless Steel (cast material) | 1.4581 | G-X7 Cr Ni Mo Ti 18 10 | Austenitic high-alloy steel for aggressive
media. |
| Cast Iron | 0.6025 | GG - 25 | Mainly for flange valve casings up
to PN 16. Limited temperature range. Suitable for neutral media. |
| Brass | 2.0402 | Cu Zn39 Pb3 F37 | All-purpose. Not suitable for aggressive
and ammoniac media. |
| Red Brass | 2.1096 | Cu Sn Zn Pb7 | Applicable where brass is not suitable,
e.g. for sea water, slight aggressive water or steam. |
| Spheroidal Cast Iron | 0.7043 | GGG - 40.3 | Mainly used for flange valve casings
up to PN25. Used where GG-25 is too brittle. Suitable for neutral media. |
| Cast Steel | 1.0619 | GS - C 25 | Mainly used for flange valve casings
up to PN40 and high temperature ranges. Suitable for neutral media. |
Plastics for casing |
|
|---|---|
| Material | Characteristics |
| PFA, Fluorine plastic | Resistant as PVDF, however, suitable
for a higher temperature range from -20°C up to +150°C. |
| POM, Polyoxymethylen | Material with high hardness and less
water absorption. Not for acids and bases and oxidants. |
| PP, Polypropylene | Resistant against watery solutions
of acids, lyes and salts, depending on the concentration and temperature. |
| PVC, Polyvinyl Chloride | Resistant against most acids, lyes,
saline solutions and organic solutions mixed with water. Not resistant
against aromatic and chlorinated hydrocarbon. |
| PVDF, Polyvinylidene Fluoride |
Suitable for nearly all aggressive
Media for a temperature range of -20°C up to +100°C. |
Sealing Materials |
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|---|---|---|
| Material | Temperature Range °C | Characteristics |
| EPDM-Ethylene- Propylene-Rubber |
-20 °C up to +130 °C | Resistant against lyes and acids, rubber
of medium concentration, water, hot water and steam. Not resistant to
oil and greases. |
| FKM-Fluorine Rubber | -20 °C up to +180 °C | Elastomer with high temperature and
resistance to atmospheric corrosion. Suitable for many acids, bases, fuels
and oils (even synthetic). Inconstant to hot water and steam. |
| H-NBR | -35 °C up to +150 °C | Elastomer with high ozone-, aging stability
and resistance to atmospheric corrosion. Suitable for diluted acids, oils
(animal and vegetable) and salt solutions. |
| NBR-Acrylonitrile- Butadiene Rubber |
-10 °C up to +80 °C | Elastic standard material for neutral
medium like air and water. Highly resistant against mechanical loads. |
| PTFE- Polytetrafluor-Ethylene |
-180 °C up to +200 °C | A thermoplastic, no elastic material
and therefore not suitable for the „classic“ diaphragms (separating
foils are possible). Valve casings and inner valve parts are made from
this material. |
| Peek | -200 °C up to +300 °C | A thermoplastic, no elastic material
and therefore not suitable for the „classic“ diaphragms (separating
foils are possible).
Suitable for extremely high temperatures and high pressures. |