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Liag 2-Way Control Arc Valves

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2-Way Control Arc Valves

2-Wege-BogenventilFields of applications

On account of their favorable flow characteristic LIAGarc valves are particularly suited for proportioning viscous and pasty products. Depending on the product to be proportioned LIAGarc valves can be delivered with various shutter qualities and linearization inserts. Control is performed via a standard 4-20mA (0-10V) electrical actuator. The control characteristic / rate of flow or the control range can be adapted to customers requirements.


  • No dead pockets
  • CIP/SIP capability
  • Product-saving proportioning
  • No product remainders or sticking of solid particles
  • Full linearization option of control characteristic
  • Minimum number of components and wearing parts
  • Can be completely dismantled even when welded in place
  • Optionally with 3-A approval / FDA

Technical Data Overview

Nominal sizes:
DIN DN25 - DN 100 / SMS DN25 - DN102 / Inch 1" - 4"

Inox parts in contact with product:
Other inox parts:
O-ring seals:

AISI 316L (1.4404 / 1.4435)
AISI 304 (1.4301)
EPDM, FPM (Viton), FEP, other grades upon request
Hostaflon(PTFE TFM1600)


In contact with product:

Ra ≤ 0,8 m (Ra ≤ 32in)


Operating temperature:

110C (230F)
140C (284F) - optionally up to 160C (320F)

Operating pressure:

Pressure behind arc:
Pressure against arc:

10 bar (145 psi) - optionally up to 20 bar (290,1 psi)
3 bar (43,5 psi)


Electrical actuator with positioning control 4-20mA (0-10V), 220-240V, 50/60Hz / IP65

Valve connection (2-way):

Welded ends:
Male ends:
Clamp connection:

DIN 11851, SMS 1145
US Standard 3A (Tri-Clamp)

  • Linearization insert - mechanical adaptation of control characteristic
  • Heated version
  • Shutter material, alternatively glass-fiber reinforced Teflon (GL25), Techtron, Tecapeek
  • Pneumatic actuator with electric positioning control
  • Leakage control of moving O-ring seal / steam barrier with ball-bearing supported selector shaft
  • 3-A approval / FDA
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