RIEGER Overflow valves E8 are a combination of angle valves and relief valves. Unlike an overflow valve, this valve opens on request up to 100% stroke like shut-off valve. It is possible to seal the overflow valves.
One possible application is the protection of forced-feed pumps e.g. peristaltic pumps.
The overflow valve E8 is suitable for all liquid pumpable media.
Overflow valves are no safety valves.
For this purpose we recommend the TÜV certified safety valve type SH .
| Material | product contact optional not product contact | 1.4404/AISI316L 1.4435/AISI316L 1.4301/AISI304 | |
| Seals | PTFE bellows metal bellows O-rings/gaskets | PTFE 1.4571/1.4404 EPDM | |
| Temperatures | maximum | EPDM | PTFE |
| operating temperature sterilisation temperature | 130 °C* 150 °C* | 121 °C* 135 °C* short-time (approx. 20 min) | |
| Operating pressure | closing pressure control air pressure | max. 6 bar min 6 bar - max. 10 bar | |
| Surfaces | product contact optional not product contact | Ra <= 0,8 µm e-polished, other surfaces on request Ra <=1,6 µm | |
| Connections Standard- pipe classes | DIN 11850-R2 (DIN 11866 A) O.D.-Tube (DIN 11866 C) DIN EN ISO 1127 (DIN 11866-B) | ||
- Right angle type L
- Double right angle type T
- Cross type TT
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