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
• Wear-resistant, corrosion-resistant and undermining-resistant seat
• 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 Tests and approvals

Materials

• Body: Ductile cast iron EN-JS 1030 (GGG-40) (DIN 3230 Part 4)
• Disk: Ductile cast iron EN-JS 1030 (GGG-40)
• Valve sealing: NBR
• O-rings: NBR
• Butterfly valve stem: Stainless steel 1.4021
• Shaft bearing: Zincfree bronze
• Seat: Chrome-nickel overlay welded, microfinished

Corrosion protection

• Body: Inside and outside epoxy coating acc. to GSK guidelines
• Disk: Epoxy coating according to GSK guidelines

Versions

• With handwheel
• With electric actuator
• With pneumatic actuator
• With hydraulic actuator
• Special designs and bigger sizes available on request
• With ceramic coating