GEMÜ 497 Edessa

Manually operated butterfly valve

  • Description
  • Features
  • Technical specifications
  • Accessories

The GEMÜ 497 Edessa PTFE seal butterfly valve is manually operated. It has a metal hand lever or gearbox depending on customer requirements. Disc and shaft are one piece, body and liner are available in different designs. The butterfly valve is available in nominal sizes DN 25 to 600 and in standard installation lengths ISO 5752/20 | EN 558-1/20 | API 609 category A (DIN 3202 K1) in wafer and lug body versions.

  • Suitable for chemically corrosive media
  • High-quality selection of materials can be combined in different ways
  • High level of plant reliability thanks to one-piece shaft and spring-washer-supported seal system
  • Long service life thanks to shaft bearings and special disc and liner geometry
  • Lockable hand lever
  • Optional stainless steel hand lever
  • Media temperature:-20 to 200 °C
  • Ambient temperature:-20 to 95 °C
  • Operating pressure :0 to 10 bar
  • Nominal sizes:DN 25 to 600
  • Body configurations:Lug | Wafer
  • Connection standards:AS | ASME | DIN | EN | ISO | JIS
  • Body materials:1.4404, block material | EN-GJS-400-18-LT, SG iron material | S355J2 + N, cast steel material | VE Duroplast, reinforced
  • Body coating:Epoxy
  • Liner materials:PTFE / silicone | PTFE TFM™/EPDM | PTFE TFM™/FKM | PTFE TFM™/silicone | PTFE/EPDM | PTFE/FKM
  • Disc materials:1.4404 (316L), forged material | 1.4469, Duplex cast steel material | 2.4602 (alloy 22), block material | 3.7035, titan
  • Disc coating:PFA
  • Conformities:ATEX | EAC | FDA | Functional safety | TA Luft (German Clean Air Act) | USP

Fitting Accessories

Product video

Videotutorial: Modifying to an pneumatic NO NC actuator

03:32 min
Online since 03.11.2021
GEMÜ valves in plants for modern sludge recycling

Product applications

GEMÜ valves in plants for modern sludge recycling

Large sewage clarification plants, such as the urban drainage department of Stuttgart, recycle their sludge in mono-combustion plants. GEMÜ valves in the plant design ensure the safety and reliability of processes when it comes to drying sludge.