Hygienic PMO Mix Proof Valves N2

PMO variant with 3-A approval

RIEGER hygiene double seat valves N2 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 in USA.
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.

SpeedPush Actuator

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.

Materialin contact with product
not in contact with product
(others on request)
 continuous operation
steam sterilization
 130 °C*
150 °C* short-time
(approx. 20 min)
Pressuresclosing pressure

air pressure
max. 10 bar
min 6 bar -
max. 10 bar
Surfacesin contact with product

not in contact with product
Ra ≤ 0,8 µm
e-polished, other surfaces on request

Ra ≤ 1,6 µm
Standard- pipe
DIN 11850-R2 (DIN 11866 A)
O.D.-Tube (DIN 11866 C)
                                                                                 *dependent upon operating conditions
reduced type
Port configurations as shown
in picture or in 360° possible.
  • one-piece solid valve body
  • no welding distortion
  • water hammer safe up to 30 bar
  • both valve disks are balanced
  • low control air consumption
  • standard actuator with 3 lift functions (open, upper seat lift, lower seat lift)
  • by lifting of both disks easy cleaning
  • valve seat removable from the top
  • radial sealing of both valve seats
  • only 4 gaskets in the product area
  • maintenance without special tools
  • stainless steel contact with product 316L
  • inner surface Ra ≤ 0,8 µm (standard)
  • also available in 3-A version
  • reduced body configurations available (see Type 200 and Type 150 of the N1)


  • DN 25 – DN 200
  • 1" – 8"

Recommended Bürkert control tops for aseptic valves with 24 V DC 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:

24 V DC with 4 digital outputs screw terminals, cable gland:

AS-Interface with a maximum of 62 slaves flat cable clamp with 1 m cable


  • 3 solenoid valves for e.g. double seat valves N1, N2, N3, N4, N7, N13

For more details see website Bürkert www.buerkert.com

All Valves are available in special alloys, such as Hastelloy C22, 1.4539/904L, 1.4529, AL6XN and others.

Directly send us your inquiry:
Tel.: +49 7361 5702-0