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GEMÜ 797

Manually operated high-pressure ball valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ 797 3-piece 2/2-way metal ball valve is manually operated. It has a plastic sleeved hand lever. The seat seal is made of PTFE. Due to a graphite reinforced body seal, the GEMÜ 797 ball valve is optionally also available as a FireSafe version.

  • Low maintenance and reliable spindle sealing
  • Broad range of operating temperatures and pressures
  • Choice of various body materials and connection types
  • Lockable hand lever
  • Suitable for vacuum applications
  • Fire-safe design according to API 607 optionally available
  • Connection: Flange; Spigot; Threaded connection
  • Actuator: Manual
  • Seal material
  • Body material: 1.4408, investment casting material
  • Conformities: ATEX; FDA; FireSafe; TA Luft (German Clean Air Act)
  • Max. operating pressure: 137 bar
  • Max. media temperature: 180 ° C
  • Min. media temperature: -20 ° C
  • Nominal sizes: DN 10 (3/8''); DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4'')

Fitting Accessories

Product video

How ball valves work

00:43 min
Online since 16.09.2015
CLEAN FILTER PRESSES SAFELY: GEMÜ ball valves protect compressed air networks

Product applications

CLEAN FILTER PRESSES SAFELY: GEMÜ ball valves protect compressed air networks

In water treatment and product filtration, filter presses separate solids and liquids in substances such as slurries or suspensions. The mixture of substances to be separated is pressed against the filter cloths via a pump with a pressure of 10–20 bar. The solid parts of the mixture are caught by the filter, forming a filter cake. If the filter press is full, compressed air is used in some procedures to dry the filter cake.

Product news


From a single source – Manual GEMÜ ball valves with integrated position feedback

Product news


Reliable even at high operating pressures