The GEMU 490 Edessa PTFE seal butterfly valve has a bare shaft. 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) available in wafer and lug body versions.
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
- 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: With bare shaft
- 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; DN 700; DN 900; DN 1000
