Hygienic Bottom Seat Valves ESV Type B

RIEGER ESV Single Seat Valves are used, when a maximum level of productivity, safety and quality is requested. They are found in production plants of the dairy industry and the food industry, the pharmaceutical and the chemical industry and biotechnology.

The advanced valve concept, proven a thousand times in daily use guarantees high flexibility within the individual series.
RIEGER-ESV-hygienic-single seat valves guarantee our customers the perfect problem solution for their liquid products.

Thanks to the modular system, the switch from hygienic- to aseptic-design, from "air-opening" to "air-closing" is possible without any problems. The construction measures can also be adapted to the conditions on site.
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)
closing pressure

air pressure
max. 6 bar

min 6 bar -
max. 10 bar
in contact with product

not in contact with product
Ra ≤ 0,8 µm
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)

                                                                                 *dependent upon operating conditions

Absolute product safety

technically vacuum safe

safely chambered profile gasket at the spindle of our Hygienic
Single Seat Valves fulfills the function of a gasket and a wiper

axial sealing with o-rings in valve seat

unique o-ring groove avoids product
getting behind o-ring

no threaded connections in product area as
one-piece valve disks are being used


exchange of gaskets without special tools

actuators completely maintainable

rebuild of actuators from spring to close (NC) to spring
to open (NO) and vice versa possible

low requirement of air supply

insert of valve can be complete disassembled to the top


upgrade to aseptic version possible

low pressure drop

no dome and no sump in valve due to ball-shaped valve body

Full Stroke design shortens cleaning time for viscous media

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


  • 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

For more details see website Bürkert www.buerkert.com

All Valves are available in special alloys, such as Hastelloy® C-22, 1.4539/904L, 1.4529, AL-6XN® and others.

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