Hygienic Inclined Seat Valves ESV Type Y

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
See Hygienic Inclined Seat Valve LCV Type Y

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

This control top has been developed between AWH and Rieger in collaboration with Bürkert. It serves as a custom-fit solution for our in-house hygienic and aseptic process valves to achieve an even more efficient and precise application.

Contact-free inductive valve position measuring (Teach function)

  • status display luminated in colour
  • integrated control air supply to the actuator
  • field bus port AS-interface, DeviceNet, IO-Link or Bürkert system bus (büS)
  • with ATEX-option:
    Ex II 3 G Ex ec IIC T4 Gc X

    Ex II 3 D Ex tc IIIC T135°C Dc X

FlowStar is available in the models 24 V DC, AS-I bus, IO-Link (Port Class A) or Ethernet IP.
All models  are available as the following alternatives::

  • without solenoid valve, 3 internal proximity switches + 1 outlet for external proximity switch
  • 1 solenoid valve, 3 internal proximity switches + 1 outlet for external proximity switch
  • 2 solenoid valves, 3 internal proximity switches + 1 outlet for external proximity switch

Mounting kit integrated in Control Top – no separate mounting kit necessary. Exception for LCV valves, ESV valves.

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