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.
|
Application
Shut-off valve for water, steam, on special
request also for non-aggressive liquids and
gases for service pressures and temperatures:
The valve is not suitable for valve regulation.
Technical description
Manually operated valve is yoke-type,
electrically actuated valve is bonnet type.
Closing disc fits into a rolled seat in the body.
Stem is sealed withgland packing in the
bonnet. In DN 15-150 valves the flow
direction is from under the disc. For DN 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, bonnet grey cast iron (GG-20)
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 fibre
Testing
The valve is tested as per DIN 3230.
|
