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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 not safety valves.
We recommend the TÜV-certified safety valve type SH for this purpose.
| Material | in contact with product optional not in contact with product |
1.4404/AISI316L 1.4435/AISI316L 1.4301/AISI304 |
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| Gaskets |
PTFE bellows O-rings/gaskets |
PTFE EPDM (others on request) |
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| Temperatures |
maximum | EPDM | PTFE |
| continuous operation
steam sterilization |
130 °C*
150 °C* |
121 °C*
135 °C* short-time |
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| Pressures | possible set pressure for O-ring version |
0,5 – 10 bar (other pressures on request) | |
| PTFE bellows version
set pressure range |
2 – 6 bar
Requested set pressure required in purchase order |
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| air pressure | min. 6 bar – max. 10 bar |
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| Surfaces | in contact with product optional not in contact with product |
Ra ≤ 0,8 µm e-polished, other surfaces on request Ra ≤ 1,6 µm |
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| Connections Standard- pipe classes |
DIN 11850-R2 (DIN 11866 A) O.D.-Tube (DIN 11866 C) DIN EN ISO 1127 (DIN 11866-B) |
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