Installation
The valve can be installed in horizontal or vertical piping. For electrically
actuated valves, the axis of electric motor must remain horizontal. If an
actuator is fitted with el. motor which axis is vertical, amount of oil fill must be
increased. If the valve is installed horizontally, the actuator must be supported.
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Application
Service liquid can be water, non-aggressive
liquids, steam and gases for service pressures
and temperatures:
Closure tightness is not guaranteed for the
valve with regulating disc.
Technical description
The valve is yoke-type. The disc fits into
sealing surface welded into the valve body.
Stem is sealed with gland packing in the yoke.
Body and yoke are castings.
Connecting and end-to-end dimensions
Butt-weld end finish as per ČSN 13 1075,
DIN 2559 and end-to-end dimensions as per
ČSN 13 3051.
Material
to 400°C to 550°C
Body 42 2643 42 2744
Disc
17 023.6 15 128+stellite
Stem 17 027 17 322
Gland packing asbestos-free graphite
Seat (weld overlay) E-B405 stellite
Yoke 42 2744
Testing
The valve is tested as per ČSN 13 3060, part 2,
DIN 3230-3.
Operation
The valve is operated by handwheel (DN 125
and 150 with gear), el. servomotor or from a
stand. The type of electric actuator and
maximum pressure drop is selected by the
supplier.
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