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Testing
The gate valve is tested per ČSN 13 3060, part 2.
Installation
The gate valve can be installed in horizontal, vertical or oblique
piping. For electrically actuated valves, the axis of electric
motor must remain, horizontal. If the servomotor is installed or
from a vertical axis upwards, amount of oil fill must be
increased. If the valve is installed horizontally, the actuator must
be supported.
Operation
The gate valve can be operated by handwheel, chainwheel,
electric servomotor (S 38.1 113) or from a stand.
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Application
Shut-off valve for water, saturated and
superheated steam, gases, non-aggressive
liquids, crude oil and oil products with
temperature -50°C to 550°C (according to
material used). Use of the valve for other
media must be discussed with the supplier in
advance.
The gate valve is not suitable for flow regulation
Technical description
The yoke gate valve has a 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. Seats and
wedge have stainless steel welded sealing
surfaces. The seats are screwed into valve
body. Stem is sealed with gland packing in a
bonnet. Gate valves can be provided also with
a drain plug, vent plug or bypass.
Connecting and face-to-face dimension
Face-to-face dimension as per ČSN EN 558.
Flange connection dimensions as per
DIN 2501 and DIN 2526.
Basic face-to-face and connecting dimensions
are shown in the table.
Material
Body, bonnet, wedge cast steel (42 2643.1)
Stem stainless steel (13 Cr)
Seats steel 12 022.1
Sealing surfaces weld deposit 13Cr
Gland packing asbestos-free graphite
Alternative materials per DIN standards are
also available.
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