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Laufer Valve

Pigging Valves

Ideal for hygienic pigging processes

LIAG® pigging valves have been designed according to hygienic design guidelines to meet the high demands of process engineering applications. They build upon the same design principle as free flow arc valves. By virtue of this principle no products remain in the valves during operation.

The prime use of LIAG® pigging valves is with sterile pigging systems as they can be disassembled easily and quickly even when welded in place, and additionally, offer high CIP 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® lip pigs
  • Compact design for 90° installation
  • Minimum number of components and wearing parts
  • Can be completely dismantled even when welded in place
  • Optionally with 3-A 51-01 and FDA compliance
  • CRN

Operating positions

Pigging valve


Data Sheets

Pigging Valves DIN

Pigging Valves SMS

Pigging Valves Inch

Accessories and Spare Parts


Arc and pigging valves

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, FPM (Viton®)‚ FEP, other grades upon request
Shutter:Dyneon™ TFM1600
In contact with products:Ra ≤ 32µin (Ra ≤ 0.8 µm)
Operating temperature:110°C (230°F)
Short-term:140°C (284°F) - optionally up to 200°C (392°F)
Operating pressure:
Pressure behind arc:10 bar (145 psi) - optionally up to 20 bar (290.1 psi)
Pressure against arc:3 bar (43.5 psi)
3-way (3x120°)
Valve connection:
Welded ends:DIN, Inch (SMS, ASTM)
Male ends:DIN 11851, SMS 1145
Furhter options:
  • Shutter material; alternatively Teflon +15% Peek, Tecapeek®
  • Heated version
  • 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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