GEMÜ 498 Edessa

Motorized butterfly valve

  • Description
  • Features
  • Technical specifications

The GEMÜ 498 Edessa PTFE seal butterfly valve is motorized. Various metal or plastic on/off or control actuators are available. The disc and shaft are one piece; the body and liner are available in different designs. The butterfly valve is available in nominal sizes DN 25 to 1050 (1½"–36"), in the standard installation lengths: ISO 5752/20 | EN 558-1/20 | API 609 category A (DIN 3202 K1) and wafer and lug body versions available.

  • 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
  • Wide choice of motorized actuator types
  • Media temperature: -20 to 200 °C
  • Ambient temperature: -20 to 95 °C
  • Operating pressure*: 0 to 10 bar
  • Nominal sizes*: DN 25 to 1050
  • Installation lengths: ISO 5752/20 | EN 558-1/20 | API 609 category A
  • Body configurations: Lug | Wafer
  • Connection types: Flange (lug) | Flange (wafer)
  • Connection standards: AS | ASME | DIN | EN | ISO | JIS
  • Housing materials: 1.4404, block material | EN-GJS-400-18-LT, SG iron material | S355J2 + N, cast steel material | VE Duroplast, reinforced
  • Liner materials: PTFE / silicone | PTFE TFM™ / FKM | PTFE TFM™/EPDM | 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
  • Supply voltage: 100 - 120 V AC, 50/60 Hz | 12 - 24 V AC/DC | 220 - 240 V AC, 50/60 Hz | 380 - 480 V AC, 50/60 Hz
  • Operating time 90°: 4 to 100 s
  • Protection class: IP 65, 66, 67, 68
  • Conformities: ATEX | CSA | EAC | FDA | SIL | TA Luft (German Clean Air Act) | USP

Product video

Quality is the sum of all the parts: GEMÜ butterfly valve test rig

03:47 min
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Online since 16.09.2015
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.