Delval 44-49 Series High Performance Double Offset Butterfly Valve

Delval 44-49 Series High Performance Double Offset Butterfly Valve

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
Leakage Class	Soft seat – Class VI Metal seat – Class IV
Design Standard	API 609 Category B, BS EN 593
Testing Standard	API 598, BS EN 12266-1

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

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