Butterfly valve KG9 Wafer

The GEFA butterfly valve KG9 in wafer design is a compact, centric and soft-seated industrial valve for applications in chemical, energy and water technology. Thanks to its robust cast iron body, durable elastomer seat ring and high-quality stainless steel disc, the KG9 offers a reliable, service-friendly solution for liquids, gases and steam. It impresses with its compact design, high tightness and flexible automation capability – ideal for industrial processes, HVAC systems and modern plants.

Special features

• Centric, soft-sealing construction
• Wafer version for installation between flanges
• Robust cast iron housing EN-GJL-250
• Stainless steel washer (1.4408 up to DN150, from DN200 alternative materials)
• Replaceable seat ring made of EPDM (other materials available)
• High tightness, vacuum-tight
• Optional ATEX-compliant version
• Suitable for pneumatic and electric automation
• Standardized face-to-face length according to EN 558-1 series 20

Advantages

• Compact and lightweight fitting for easy installation
• Very good tightness due to replaceable elastomer seat
• Low pressure loss thanks to centric damper geometry
• Durable due to solid cast iron construction
• Service-friendly and low-maintenance during operation
• Versatile – from water technology to the chemical industry
• ISO flange optimally prepared for automatic actuators

Variants

• Nominal sizes: DN 40-DN 300
• Nominal pressures: PN 10 / PN 16
• Seat rings:
  EPDM (standard)
  NBR
  Viton
  PTFE (on request)
• Washer material:
  Stainless steel 1.4408 (DN 40-DN 150)
  From DN 200 alternative materials: ductile iron, 1.4021 or others depending on version
• Special features:
  Two-part body for quick seat changes
  Self-centering wafer design
  Hermetically sealed up to 16 bar
  Vacuum-compatible
• Automation options:
  Pneumatic quarter-turn actuators
  Electric actuators (24 V / 230 V)
  Limit switch boxes, position indicators
  Solenoid valves, adapters, bridges

Areas of application

• Chemicals & pharmaceuticals: reliable shut-off of neutral and slightly aggressive media
• Energy & power plants: cooling and process water circuits, steam piping systems
• Water & wastewater technology: drinking water, process water, filtration
• HVAC systems: Heating, ventilation and air conditioning systems
• General industry: media lines for liquids, gases and low vapor pressures