Hygienic overflow valves type E8

RIEGER E8 overflow valves are a combination of angle valves and overflow valves. Unlike an overflow valve, this valve opens on request with up to 100 % stroke like an angle valve. It is possible to seal the overflow valves.

One possible application is the protection of forced feed pumps (e.g. peristaltic pumps).
The E8 overflow valve is suitable for all liquid media.

Overflow valves are not safety valves.
We recommend the TÜV-certified safety valve type SH for this purpose.

Material product touched
not in contact with the product
Seals O-rings/seals EPDM
(others on request)
Temperatures maximum EPDM
Continuous operating temperature


130 °C*

150 °C* short term
(approx. 20 min)

Press Possible set pressure with O-ring design 0.5 – 10 bar (higher pressures on request)
Pressure range depending on installed spring Specify desired setting pressure when ordering
Control air pressure min. 6 bar –
max. 10 bar
Surfaces product touched

not in contact with the product

Ra ≤ 0.8 µm
e-polished, other surfaces on request
Ra ≤ 1.6 µm
Pipe classes
DIN 11850-R2 (DIN 11866 A)
O.D. tube (DIN 11866 C)
DIN EN ISO 1127 (DIN 11866-B)


*dependent on operating parameters

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