Butterfly valves

Series 44-49 High Performance Double Offset

Series 44-49 high performance double offset

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

Technical data

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

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