The RIEGER N7 double-seat valve (also known as a double chamber valve) ensures reliable separation of the process rails through the CIP/SIP-capable leakage chamber. CIP/SIP valves control the steam inlet and condensate outlet at the leakage chamber. The excellent aseptic properties are achieved by hermetic separation from the environment.
Rieger does not rely on metal bellows in the fruit sector, e.g. for yoghurt with strawberries, but on the PTFE-metal combination bellows, which combines the durability of the PTFE bellows (more than 1 million switching cycles) with the erosion-free sealing technology of the O-ring!
This valve is indispensable in aseptic valve manifolds and on aseptic filling machines where the highest value is placed on comprehensive product safety.
Left in the picture: Tube variant
Another variant is the aseptic double-seat valve N7 (also called double chamber valve) as a tank outlet valve. As with the version for piping, the separation of the product from the environment is completely guaranteed.
Thanks to their innovative design, the PTFE bellows guarantee an extremely long service life (more than 1 million strokes). They do not block when the valve is opened so that the pleats always remain open and can be cleaned properly. Unlike metal bellows, which still require O-rings for sealing, here the PTFE bellows is the only sealing element that hermetically seals the valve interior from the environment without a dome or dead space (one-piece seal in product contact).
Material | product touched optional not in contact with the product |
1.4404/AISI316L 1.4435/AISI316L 1.4301/AISI304 |
|
Seals | Teflon bellows Metal bellows O-rings/seals |
PTFE 1.4571/1.4404 EPDM |
|
Temperatures | maximum | EPDM | PTFE |
Continuous operating temperature
Sterilization temperature |
130 °C*
150 °C* |
121 °C*
135 °C* short term |
|
Press | Closing pressure Pipeline type Tank type Control air pressure |
max. 6 bar in the pipe max. 4 bar in tankmin 6 bar – max. 10 bar |
|
Surfaces | product touched optional not in contact with the product |
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) |
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 Screwed bellows Optimal to clean |
Economic efficiency | Long service life of the PTFE bellows
Standard gaskets Minimal maintenance costs |
Additional certificates | in 3-A version or with TA-Luft certificate (bottom seat valve) possible |
The Rieger control head was developed in collaboration between AWH and Rieger together with Bürkert.
Rieger thus offers you a tailor-made solution for your in-house hygienic and aseptic process valves so that they can be used even more efficiently and accurately.
NON-CONTACT INDUCTIVE VALVE POSITION DETECTION (TEACH FUNCTION)
The FlowStar is available in 24 V DC, AS-I bus, IO-Link (Port Class A) or Ethernet IP versions.
All versions are available as the following alternative:
Mounting kit integrated in the control head – no separate mounting kit required. Exception for LCV valves, ESV valves.
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