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Laufer Valve

Venturi Powder Control Valve

LIAG® Venturi powder control valves are designed to enable smooth flow of powder through the valve, the middle port is orientated at a 135°/45° angle to the straight through passage. The Y-Arrangement of the inlet creates the ideal flow and vaccum exhaust characteristics for proportioning and dosing. This allows for a complete full bore without reducing the nominal diameter as often experienced with the use of a butterfly valve. Furthermore the Venturi powder control valve can replace up to two Butterfly valves, which improves the operating control of the unit.


  • Totally clear passage - no pressure loss
  • No dead pockets
  • No product retention or sticking of solid particles
  • Can be completely dismantled even when welded in place
  • Identical wearing and spare parts as shutter valves


Data Sheets

Venturi Powder Control 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.

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)
Operating temperature:230°F (110°C)
Short-term:284°F (140°C) - optionally up to 392°F (200°C)
Operating pressure:
Pressure behind arc:145 psi (10 bar) - optionally up to 290.1 psi (20 bar)
Pressure against arc:43.5 psi (3 bar) 
Manual:with handle
Pneumatic:Electro-pneumatic control unit consisting of
  • Pneumatic actuator 0°-90°
  • Positioner Positurn 4-20mA (0-10V), 24V DC, IP65
Valve connection:
Clamp connection:Tri-Clamp
Weld ends:Inch, DIN
Male ends:DIN 11851
Further options:
  • Shutter material, alternatively Teflon +15% Peek, Tecapeek®
  • Combination of different types of connection
  • Delivery and adaptation to actuators of different manufacture per Namur NE14 and DIN EN ISO 5211

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