Unidirectional Knife Gate Valve Serie A    



Unidirectional Knife Gate Valve – Serie A

Unidirectional Knife Gate Valve – Serie A

  • One piece cast body with guides to support gate and seat wedges.
  • Provides high flow rates with low pressure drop.
  • Various seat and packing materials available.
  • Face to face dimension in accordance with CMO stan­dard.
  • An arrow is marked on the body indicating the flow di­rection.


Standard manufacturing sizes: From DN50 up to DN2000


ND50 – 250 10 bar
ND300 – 400 6 bar
ND450 5 bar
ND500 – 600 4 bar
ND700 – 1600 2 bar

The mentioned working pressures are just valid for the pressures applied on the direction of the arrow market on the body. As

the valve is designed with gate support guides, the valves are able to support a 30% of these pressures from the opposite direction without any damage on them. In these cases, the valves are not 100% water tight. To obtain total water tightness in these conditions, it is necessary to incorporate additional supports.


This knife gate valve is suitable for liquids that contain a maximum of 5% suspended solids. If it is used for dry solids in gravity feed applications it should be installed with the arrow on the body pointing in the opposite direction to the flow.


  • Unidirectional Knife Gate Valve – Serie A

    Unidirectional Knife Gate Valve – Serie A

    Paper Industry

  • Mining
  • Silo emptying
  • Chemical plants
  • Pumping
  • Food Industry
  • Sewage treatment


  • Pressure Equipment Directive:
    (PED) ART 4.3 /CAT.1.• Potential Explosive Atmospheres Directive:
    (ATEX) CAT.3 ZONA 2 y 22 GD.


All valves are tested hydrostatically at CMO Valves and ma­terial and test certificates can be provided.

  • Body test = working pressure x 1.5
  • Seat test = working pressure x 1.1