Product characteristics and benefits

• 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
• 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 1.4021
• Shaft bearing: Zincfree bronze
• Seat: Enameled

Corrosion protection

• Body: Inside true enamel and outside prime enamel with epoxy coating
• Disk: Epoxy coating

Versions

• Standard version as described
• With handwheel
• With electric actuator
• With pneumatic actuator
• With hydraulic actuator
• Special designs and bigger sizes available on request