Installation
The gate valve can be installed in horizontal or vertical piping. For
electrically actuated valves, the axis of electric motor must remain
horizontal. If the servomotor is installed with vertical axis
upwards, amount of oil fill must be increased. If the valve is installed
horizontally, the actuator must be supported.
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Application
Shut-off valve for non-aggressive volatile
liquids, toxic vapors, gases and overpressure
piping where vacuum can occur, for pressures
and temperatures:
The gate valve is not suitable for flow regulation
Technical description
The yoke gate valve has flooded packing and
rising non-rotating stem with its thread
outside the valve chamber. The stem nut is
turned to raise or lower the stem and flexible
wedge. Body and wedge have stainless steel
welded sealing surfaces. Flooding is achieved
by a valve with a screw coupling and a DN 10
threaded coupling. Stem is sealed with gland
packing in yoke. Gate valve DN 200 and 250
and working overpressure higher than 1,00
MPa can be provided with a bypass.
Connecting and face-to-face dimensions
Face-to-face dimension as per ČSN 13 3045.
Flange connection dimensions as per
ČSN 13 1060, DIN 2501.
Flange faces as per ČSN 13 1061,DIN 2526.
Material
Body, bonnet, wedge carbon steel (42 2643.1)
Stem stainless steel (13 Cr)
Sealing surfaces weld deposit 13Cr
Gland packing asbestos-free graphite
Testing
The gate valve is tested per ČSN 13 3060,
DIN 3230-3.
Operation
The gate valve can be operated by handwheel
(ON 13 31111), chainwheel (ON 13 3131),
electric servomotor or from a stand (ON 13
3140 and ON 13 3142).
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