DelVal Series 44/49
High Performance Double Offset
Butterfly Valves
Fire safe design and NACE versions available.
| Body Style | Wafer, Lug, Double Flanged |
| Body | CS, SS |
| Disc | CF8M, CF8 |
| Stem | 316 SS, 17-4 PH, XM-19 |
| Seat | Ultra, PTFE, RTFE, Metal (SS, Inconel), Firesafe |
| Size Range | Series 44, 45 – 2″ to 48“ (DN 50 to 1200)
Series 47, 48 – 2” to 24” (DN 50 to 600) Series 46 – 3″ to 48“ (DN 80 to 1200) Series 49 – 3″ to 24“ (DN 80 to 600) |
| Pressure Rating | Series 44, 45, 46 – Class 150
Series 47, 48, 49 – Class 300 |
| Design Standard | API 609 Category B, BS EN 593 |
| Testing Standard | API 598, BS EN 12266-1 |
FEATURES
- ISO 5211 top plate for direct mounting of a wide range of actuators, handles, and gears
- Adjustable stem packing features pull down gland with easy access without removal of actuator
- Tangential wedge pins are offset from center of stem putting them in compression rather than shear
- Disc stop designed to prevent disc rotation in wrong direction and potential seat damage
- Retainer clip provides blow-out proof stem
- Live-loaded stem seal system by a set of Belleville springs. Rocker shaped gland bridge compensates for uneven adjustment of gland bolts
- “Bear-X” bearing has excellent thermal, chemical and wear resistance
- One piece body with extended neck
- Self-energizing flexible lip seal soft seat design. Two points of contact on firesafe metal seat design
