Shut-Off-Valve type GGNA

Ductile cast iron with solid monobloc housing

find a use where stainless steel shut-off-valves are not necessary available in various seal types

areas of application

one part gate valve for industrial use

nominal diameters: DN 50 - 600 (2 - 24")
material: ductile cast iron (EN-JS1050 / GGG50), valve plate of stainless steel (1.4301)
flanges: DIN EN 1092-1, ANSI B 16.5 class 150


Paper industry

LOHSE-GGNA shut-off-valves find a use in all areas of the pulp and paper industry where stainless steel shut-off-valves are not necessary. The GGNA shut-offvalves are sturdy and have a long service life. They are suitable to shut-off the pipes in all areas of water, waste water or pulp.

Industrial sewage management

LOHSE-GGNA shut-off-valves used in all areas of the industrial sewage treatment. The housing is epoxy coated and has a good protection against corrosion.

Waste technology

LOHSE-GGNA shut-off-valves find a use in bio-mechanical wet treatment plant. In this area the valves shut-off the pipes with high-viscosity and low-viscosity medium. The valves are running without problems although the medium has impurities and fibers.

Special models

For special application, we can supply special valves on request.




  • solid monobloc housing - wafer
  • lug design, from DN 700 Wafer design (Semi-Lug)
  • full opening
  • one-sided sealing
  • infused guidances
  • epoxy coating

Valve plate

  • solid version of stainless steel

Body seat

  • metal seated or
  • soft seated with EPDM, NBR, VITON, PTFE (replaceable)


  • PTFE impregnated synthetic fiber

Operating element

  • handwheel with non-rising stem
  • pneumatic cylinder, double-acting
  • electric drive
  • bevel gear drive