The GEMU 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 1050 (1½”–36″), in the standardised installation lengths: ISO 5752/20 | EN 558-1/20 | API 609 category A (DIN 3202 K1) and wafer and lug body versions available.
Features
- Suitable for chemically corrosive media
- High-quality selection of materials can be combined in different ways
- High level of plant reliability thanks to a one-piece shaft and spring-washer-supported seal system
- Seal material TFM (FDA 21CRF 177.1550)
- Installation length acc. to ISO 5752/20, EN 558-1/20, API 609 category A
- Top flange acc. to EN ISO 5211
- Connection standards PN 10, PN 16, ASME B16.5 cl. 150, JIS 10K
- Leak test acc. to. EN 12266-1/P12 leakage rate A
- 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
- ATEX compliant version for potentially explosive areas of group II, zones 0, 1, 2 (or 20, 21 and 22) available
Technical details
- Connection: Flange (lug); Flange (wafer)
- Actuator: Pneumatic
- Seal material
- Body material: 1.4404, block material; EN-GJS-400-18-LT, SG iron material; S355J2 + N, cast steel material; VE Duroplast, reinforced
- Conformities: ATEX; EAC; FDA; SIL; TA Luft (German Clean Air Act); USP
- Maximum operating pressure: 10 bar
- Maximum media temperature: 200 ° C
- Minimum media temperature: -20 ° C
- Nominal sizes: DN 40 (1 1/2”); DN 50 (2”); DN 65 (2 1/2”); DN 80 (3”); DN 100 (4”); DN 125 (5”); DN 150 (6”); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
