Type 91 Vacuum-Relief-Valve
Description
Type 91 Vacuum-Relief-Valve
Type 91 Vacuum-Relief-Valve
| Standard version: | |||
|---|---|---|---|
| Material: | Inlet body | / | Bonnet pipe |
| Type 91.2: | 1.4571 | / | 1.4301 |
| EPDM 1) | EPDM | EPDM | APTK ®
Ethylen-Propylen- Dien-Kautschuk |
≤ 16 bar
– 40°C to +120°C – 40°C to +140°C 2) |
< 120 bar
– 40°C to +140°C – 40°C to +150°C 2) |
≤ 25 bar | Good resistance against a lot of chemicals, hot water, steam, alkaline solution, acids, alcohol. Average mechanical characteristics.
Ozone resistant, not oil resistant. |
| FEPM | FEPM | – | CHEMFLON ®
Tetrafluoroethylen, Propylene-Copolymer |
– | < 63 bar
– 5°C to +230°C |
≤ 25 bar | For highly stressed seals with excellent performance both
Against water / steam as well as against oils. |
| FPM 1) | FPM | FKM | Viton ® Fluor-Kautschuk | ≤ 25 bar
– 20°C to +200°C |
< 200 bar
– 20°C to +200°C |
≤ 40 bar | Good resistance against a lot of chemicals, mineral oil, hot air, acid.
Average to good mechanical characteristics. |
| FFKM | – | FFKM | Kalrez ® Perfluor-Kautschuk | ≤ 25 bar
– 30°C to +260°C |
< 120 bar
– 30°C to +260°C |
≤ 40 bar | Very good resistance against a lot of chemicals, oxygen, ozone, mineral oil.
Good thermal and mechanical characteristics. |
| FVMQ | – | – | Silastic Fluorsilikon-Kautschuk | < 10 bar
– 60°C to +200°C |
< 10 bar
– 60°C to +200°C |
< 25 bar | Good resistance to oils, fuels and solvents. |
| PUR 1) | AU | AU | Vulkollan ® Polyurethan | ≤ 30/35 bar
– 30°C to + 80°C |
– | < 35 bar | Good resistance against a lot of chemicals, hydraulic oil, alcohol, fuel.
Very good mechanical characteristics. |
| NBR 1) | NBR | NBR | Acrylnitril-Butadien- Kautschuk | – |
– 20°C to +120°C |
< 25 bar | Good mechanical properties in comparison with other elastomers, a higher abrasion resistance. |
| Silikon | VMQ | VMQ | Silikon | < 6 bar
– 60°C to +200°C |
< 10 bar
– 60°C to +200°C |
≤ 25 bar | Good resistance against hot gas and air. Average mechanical characteristics. |
| ULT | – | – | Ultrathan ® | – | ≤ 25 bar |
| Nylon 1) | PA | PA | Nylon ® Polyamid | ≤ 120 bar
do 8 ≤ 50 bar – 40°C to + 80°C |
– | ≤ 160 bar | Good resistance against a lot of chemicals, fuel, cooling liquid, silicone oil.
Good mechanical characteristics. |
| PEEK 1000 | – | – | Ketron | 40 – 900 bar
– 60°C to +250°C |
– | < 200 bar | Very good resistance against a lot of chemicals. Very good thermal and mechanical characteristics. |
| PTFE 1)
PTFE/GL |
PTFE | PTFE | Teflon ® Polytetrafluorethylen | ≤ 15/25 bar
– 200°C to +260°C |
– | ≤ 50 bar | Good resistance against chemicals, acid, alkaline solution, solvent, oil.
Good thermal and average mechanical characteristics. |
| PVDF | – | – | Polyvinylidenfluorid | ≤ 45 bar
– 40°C to +150°C |
– | ≤ 100 bar | Very good resistance against chemicals, gasiform oxygen.
Very good mechanical characteristics. |
| RCH 1000 | PE | PE | Polyethylen (PE) | ≤ 45 bar
– 270°C to + 80°C |
–
– 30°C to + 80°C |
≤ 50 bar | Good resistance against a lot of chemicals, cryogenic media.
Good mechanical characteristics. |
| Vespel | – | – | Vespel ® Polyimid | 40 – 500 bar
– 270°C to +250°C |
– | ≤ 200 bar |
Very good resistance against CO2. Very good thermal and mechanical characteristics. |
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