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
150 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 water, non-aggressive
liquids, steam, oil and gases for service
pressures and temperatures:
The valve is not suitable for valve regulation.
Technical description
The yoke-type valve has a closing disc fits
into sealing surface welded into its body. Stem
is sealed with gland packing in the yoke. Flow
direction in DN 15-100 valves is from under
the disc, for DN 125-200 valves the flow
direction is from above the disc and internal
bypass reduces pressure difference before and
after the closing element (pressure drop).
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, yoke alloy steel (1.7357)
Stem stainless steel (13Cr)
Disc up to DN 100 stainless steel (13Cr)
Disc for DN 125 and above
carbon steel with weld
overlay (13Cr
Gland packing asbestos-free graphite
Testing
The valve is tested as per DIN 3230.
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