Yoke gate valve- S 38.1 111(3)-525 PN 25, S 38.1 121(3)-525 PN 25

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 (S38.1 113, S38.1 123) or from a stand.

Application
Shut-off valve for water, saturated and
superheated steam, gases, non-aggressive
liquids, crude oil and oil products with
temperature -20°C to 450°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
Flange connection dimensions as per
DIN 2501 and DIN 2526, butt-weld ends as
per ČSN 13 1075. Face-to-face dimension as
per ČSN EN 558, end to end dimensions as
per ČSN 13 3053. Basic face-to-face and
connecting dimensions are shown in the table.

Material
Body, bonnet, wedge GS-C 25
Stem stainless steel (13 Cr)
Seats 1.0405
Sealing surfaces weld deposit 13Cr
Gland packing asbestos-free graphite
Alternative materials per DIN standards are
also available.

* - only with gear