GEMÜ 491 Edessa

The GEMÜ 491 Edessa PTFE lined butterfly valve has a metal actuator and is pneumatically operated. The "Normally Closed", "Normally Open" and "Double Acting" control functions are available. 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
• Bubble tight sealing, in accordance with EN 12266-1/P12, leak rate A
• 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
• Optional accessories are installed, set and tested so they are ready for operation

• 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/EPDM | PTFE/FKM | PTFE/silicone
• 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 | FMEDA | TA Luft (German Clean Air Act)