FEATURES

  • ISO 5211 top plate for direct mounting of a wide range of actuators, and gear boxes
  • 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 and firesafe seat design with bidirectional sealing
DelVal Flow Controls High-Performance Butterfly Valves

Series 38

High-Performance Double Offset Butterfly Valve Low Pressure Rating

Full Specification

Product Series
37, 38 & 39
Size range
16" to 54" (DN 400 to DN 1350)
Pressure Rating
100 PSI (PN 7)
Design Standards
API 609, BS EN 593, MSS SP 68 & ASME B16.34
Testing Standard
API 598, EN12266-1, ISO 5208, MSS SP 68
Body Style
Lug, Wafer, Double Flanged
Body Material
(DI - ASTM A395 65-45-15), (CS - ASTM A216 WCB), (SS - ASTM A 351 CF8M/CF8/CF3M), Duplex SS
Disc Material
(DI - ASTM A216 WCB+SS316 overlay on sealing area), (CS -ASTM A216 WCB+SS316 overlay on sealing area) , CF8M, CF8, CF3M, Duplex SS
Stem Material
316 SS, 17-4 PH, XM-19, Inconel 718, Duplex SS
Seat Material
Ultra, PTFE, RPTFE, UHMWPE, Ultra + SS 316, Ultra + Inconel, Ultra + Monel 500, Metal (SS, Inconel)
Seal Material
Ultra, PTFE, RPTFE, Graphite

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