Page 5 - Catalogue 2019

QUALITY FEATURES

RESILIENT SEATED VALVE Z 011-A

MULTIPLE BEARINGS
The shafts have multiple bearings.
Optimal guidance even after many years
of use. No contact corrosion.
SHAFT RETAINER
The shaft retainer guarantees
blow-out resistance of the shaft.
NARROW TOLERANCES
Precision-machined bodies form the
basis for perfect seating of the liner and
precise positioning of the shaft.

CONVEX FORM OF THE LINER
DOUBLE-SIDED PROFILES
The end connection sealing faces of the liner
have a convex form. During assembly of the Double-sided profi les ensure the sleeve-
valve into the pipeline controlled deformation of body engagement in the outer body
the volume of the liner achieved when clamping recess.
between fl anges. This controlled deformation
restricts any increase in operating torque and
eliminates damage to or destruction of the
elastomers. ROUND COLLAR
The collars at the shaft locations
ensure accurate positioning of the
liner within the valve body - sizes
DN 250 and larger have an integral
vulcanized in steel ring.

POLISHED SEALING
SURFACES
The sealing surfaces are mirror CONTINUOUS
polished and guarantee low FORMING LOBE
torque combined with tightness. The continuous forming lobe fi ts
perfectly in the relevant groove of
the body, stabilising the liner.