Installation
The valve can be installed in horizontal or vertical Piping depending on the
flow direction. Electrically actuated valves should be installed in horizontal
piping with the actuator upwards above the valve. In other positions the
actuator must be supported or attached to a hinge.
Operation
The valve is operated by handwheel (ON 13 3110), chainwheel
(ON 13 3130) or from a stand (ON 13 3140 and ON 13 3142). DN 15 to DN 80 valves can be operated by a direct-acting electric actuator. Type of
electric actuator and maximum pressure drop is selected by the
supplier.
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Application
Shut-off valve for areas with increased
demand for valve outer tightness. The valve is
intended primarily for non-aggressive liquids
in chemical, petrochemical and refrigeration
industries for service pressures and
temperatures:
Technical description
Manual valve is head-type, electrically
actuated valve is bonnet type. Closing disc fits
into sealing surface welded into the body.
Bellows replaces gland packing and
guarantees the exterior tightness of the valve.
The valve has also safety gland packing to
provide tightness in case of bellows failure
due to its overload. Service medium flow
direction is under the disc. DN 200 valve is for
PN 25.
Connecting and face-to-face dimensions
Face-to-face dimensions as per DIN 3202 F1.
Flange connecting dimensions as per
DIN2501. Flange faces as per DIN2526, Form
C. Basic connecting and face-to-face
dimensions are given in the table.
Material
Body, head carbon steel (GS-C25)
Stem stainless steel (13Cr)
Disc up to DN 50 stainless steel (13Cr)
Disc for DN 65 and above carbon steel with
weld overlay (13Cr)
Bellows austenitic stainless steel
Gland packing asbestos-free graphite
Testing
The valve is tested as per DIN 3230. |
