Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

GEMÜ 643 tank bottom diaphragm valve


The GEMÜ 643 2/2-way tank bottom valve  is manually operated with a side mounted gear which has an optical position indicator as standard. The stainless steel valve body is machined from a single block (monoblock, no welded components)  and is designed for welding directly into a tank bottom. The metal distance piece and the operator housing are made of stainless steel.

The GEMÜ 643 2/2-way tank bottom valves are suitable for the control of inert and corrosive liquids and gaseous fluids.


  • Connection: Spigot
  • Actuator: Manual
  • ATEX
  • Explosion protection
  • Body material: 1.4435, block material
  • Max. operating pressure: 10 bar
  • Max. media temperature: 100 ° C
  • Min. media temperature: -10 ° C
  • Nominal sizes


  • Suitable for inert and corrosive liquid and gaseous media
  • CIP/SIP cleaning and sterilizing capabilities



  • Tanks can be optimally drained, cleaned and sterilized by using the GEMÜ 643
  • The temperature resistant plastic handwheel prevents burns injuries at high operating temperatures
  • Compact design (ideal when space is at a premium)
  • Tank bottom valve body also available with pneumatic or motorized actuator on request
  • Bonnet can be rotated through 360°
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