Since 1879
Hygiene Ventile von Rieger

Double seat valve N1 - hygienic


RIEGER hygiene double seat valve N1 provide reliable protection for your product by leak-proof separating not compatible products.

For years, they are invaluable in plants of beverage and brewing industry, the pharmaceutical industry as well as the food and dairy industry.

The design of its one-piece valve body and the radial sealing of both valve seats along with the balanced valve disks enable a perfectly safe CIP/ IP cleaning, thus ensuring extremely high security for your products.



  • one-piece solid valve housing
  • no welding distortion
  • water hammer safe up to 30 bar
  • both valve disks are balanced
  • low control air consumption
  • light: DN 100 = 4" only 35 kg
  • standard actuator with 2 lift functions
  • by lifting of both plates easy cleaning
  • service possible without compressed air
  • valve seat removable from the top
  • radial sealing of both valve seats
  • in the product area only 4 seals
  • seal replacement without special tools
  • contact with product 316L
  • inner surface Ra <= 0,8 µm (standard)
  • also available in 3-A version



seat lift up and down
without seat lift
seat lift up and down

reduced housings

Rieger Doppelsitzventil N1 reduzierte Gehäuse oben groß unten klein   Rieger Doppelsitzventil N1 reduztierte Gehäuse oben klein unten gross
Typ 150 = upper big - lower small   Typ 200 = upper small - lower big


Material product contact optional not product contact 1.4404/AISI316L
Seals  O-rings/gaskets EPDM
Temperatures maximum   EPDM
  operating temperature

sterilisation temperature
  130 °C*

150 °C* short-time (approx. 20 min)
Operating pressure closing pressure

control air pressure
max. 10 bar
min 6 bar -
max. 10 bar
Surfaces product contact

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)


Recommended Bürkert control tops for aseptic valves with 24 VDC or ASI bus

Contactless position with three switching points (teach-in function) with 3 internal feedback sensors, 1 output for external feedback (external feedback not included)

Two alternatives:

© Bürkert
24V DC with 4 digital outputs screw terminals, cable gland:
AS-Interface with a maximum of 62 slaves flat cable clamp with 1 m cable
  • 0 solenoid valve e.g. for single seat valves - pure feedback function
  • 1 solenoid valve for e.g. for single seat valves with actuators NC or NO
  • 2 solenoid valves for e.g. for single seat valves with air/air actuator or double seat valves N5, N9
  • 3 solenoid valves for e.g. double seat valves N1, N2, N3, N4, N7, N13
For more details see website Bürkert


Air consumption and consumption of cleaning media in the use of Mix Proof Valves might also be considered for total costs of ownership.

In order to reduce air consumption and consumption of cleaning media Mix Proof Valves with reduced air volume in the actuator are recommended. With a reduced volume, faster switching of valve disks during CIP is possible to reach the desired cleaning result even faster. Thus, less cleaning media is required in the overall cleaning cycle.



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the ATEX selection
chart in
PDF as download
… click here

Gebr. Rieger GmbH & Co. KG
Kochertalstraße 32
73431 Aalen - Germany

Tel.: +49 (0) 7361 - 5702-0
Fax: +49 (0) 7361 - 5702-51

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