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Laufer Valve

LIAG® Free Flow Shutter Valves

Ideal for pasty media and hygienic pigging processes

LIAG®  free flow 3A shutter valves have been designed according to hygienic guidelines to meet the high demands of process engineering applications. LIAG®  valves are particularly suited for viscous/pasty products and fluids containing solid particles on account of a totally clear passage, as well as, easy and thorough cleaning in place. LIAG® 3A valves have also passed the testing requirements for CIP/SIP capability.


  • No dead pockets
  • CIP/SIP capability (hygienic design)
  • Totally clear passage - no pressure loss
  • No product remainders or sticking of solid particles
  • Designed to be passed with LIAG® DMV lip pigs
  • Minimum number of components and wearing parts
  • Can be completely dismantled even when welded in place
  • 3-A 51-01 and FDA compliance
  • CRN

This valve series provides optimum conditions for a wide variety of pigging system applications. By virtue of their simplicity of design and minimum number of components and wearing parts, LIAG® valves are characterized by high hygiene, low maintenance and safe operation.


Data Sheets

2-Way / 3-Way Shutter Valve

Further information please refer to the datasheet in PDF format.

Accessories and spare parts

Further information please refer to the datasheet in PDF format.


CIP of Shutter Valve (Arc Valve)

Watch the CIP for further information about our Shutter Valve.


Sanitary Free Flow Shutter Valves

Operating positions

2-way shutter valve

3-way shutter valve

Technical Data Overview

Nominal sizes:
Inox parts in contact with product:AISI 316L (1.4404 / 1.4435)
Other inox parts: AISI 304 (1.4301)
O-ring seals:EPDM, FKM (Viton®)‚ FEP, other grades upon request
Shutter:Dyneon™ TFM1600
In contact with product:Ra ≤ 32µin (Ra ≤ 0.8 µm)
Operating temperature:230°F (110°C) 
Short-term:284°F (140°C) - Optional up to 392°F (200°C)
Operating pressure:
Pressure behind arc:145 psi (10 bar) - Optional up to 290.1 psi (20 bar)
Pressure against arc:43.5 psi (3 bar)
2-way / 3-way
Manual:with handle (4 locking positions)
  • Vertical pneumatic actuator
    (AISI 304)
  • Horizontal pneumatic actuator
    (aluminium housing)
Valve connection:
Clamp connection:Tri-Clamp
Welded ends:Inch, DIN
Male ends:DIN 11851
Further options:
  • 4-way version
  • Shutter material; alternatively Teflon +15% Peek, Tecapeek®
  • Heated version
  • Leakage control of moving O-ring seal / steam barrier with ball-bearing supported selector shaft
  • Combination of different types of connection
  • Delivery and adaptation to actuators of different manufacture per Namur NE14 and DIN EN ISO5211
  • 3-A 51-01 and FDA compliance
  • CRN

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