Resilient seated double eccentric butterfly valve
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Resilient seated double eccentric butterfly valve

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Resilient seated double eccentric butterfly valve

Product characteristics

  • Resilient seated in accordance with EN 593
  • Face-to-face length acc. to EN 558-1, basic series 14 (DIN 3202, F4)
  • With flange ends on both sides acc. to EN 1092-2
  • Double-offset disk bearing mounted in maintenance-free bushing
  • Medium free bearing (dry shaft) in body by means of double O-ring sealing and closed disk eyes
  • Possible to replace profile sealing ring without disassembling the disk
  • Automatic sealing system with enclosed and pressure-supported profile sealing ring
  • Vacuum tight up to 1 Torr
  • Tight in both flow directions (see note for excepted sizes)
  • Blow-out proof shaft and shaft sealing
  • With self-locking, fully enclosed, maintenance-free worm gear including mechanical position indicator

Materials

  • Body: Ductile cast iron EN-JS 1030 (GGG-40)
  • Disk: Ductile cast iron EN-JS 1030 (GGG-40)
  • Valve sealing: EPDM
  • O-rings: EPDM
  • Butterfly valve stem: Stainless steel 1.4462
  • Shaft bearing: Zincfree bronze
  • Seat: Rubber lined, microfinished

Corrosion protection

  • Body: Inside 3 mm hard rubber coating and outside epoxy coating
  • Disk: 3 mm hard rubber coating

Versions

  • With handwheel
  • With electric actuator
  • With pneumatic actuator
  • With hydraulic actuator
  • Special designs and bigger sizes available on request
  • With mechanical blocking of the disk (UVV locking)



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