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 optional not in contact with the product |
1.4404/AISI316L 1.4435/AISI316L 1.4301/AISI304 |
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Seals | O-rings/seals | EPDM (others on request) |
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Temperatures | maximum | EPDM | |
Continuous operating temperature
Sterilizing |
130 °C*
150 °C* short term |
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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 |
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Surfaces | product touched optional not in contact with the 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) |
Structure of the valve | Solid valve body
No dead spaces completely idle Many installation positions possible |
Absolute product protection | Complete separation from the environment
no swamp, no cathedral |
Service friendliness | Gasket replacement without special tools
Short downtimes Optimal to clean |
Economic efficiency | Standard gaskets
Minimal maintenance costs |
Additional certificates | also possible in 3-A version |
With the E8 overflow valve, the only electronic feedback is a Proximity sensor with a maximum diameter of 12 mm possible. This is attached to the mounting bracket between the valve body and actuator. This initiator is not usually provided by us. Other solutions on request. |
All valves are available in special materials such as Hastelloy® C-22, 1.4539/904L, 1.4529, AL-6XN® and others .
Please contact us directly:
sales@rr-rieger.de
Phone: +49 7361 5702-0