12
A spherical washer is only fitted between the
sight glass lid and the sight glass in GK 21
steam traps.
Otherwise, the same procedure is used for the
different types of equipment.
Slacken the hex nuts (17) in the sight glass lid.
Remove the sight glass lid (10).
In GK 21 steam traps, remove the spherical
washer (16) from the sight glass.
Remove the sight glass seal (15).
Remove the sight glass (11).
Remove the mica disc (14).
Remove the sight glass seal (13).
Slacken the shoulder screw (18) on the body.
Turn the VAPOSCOPE insert (12) to the desired
position.
Coat the thread and contact surfaces with
temperature-resistant lubricant.
The lubricant must have the same properties as
OKS 217.
Insert one sight glass seal.
Insert the mica disc.
Insert the sight glass.
Insert the second sight glass seal.
In type GK 21, insert the spherical washer in the
upper sight glass.
Insert the sight glass lid.
The necessary torque for tightening the hex nuts
varies depending on type.
Please refer to the following table for the correct
torque.
GK 21
DN50
GK 11
DN65,
DN80
GK 11
DN100
GK 11
DN150
25 Nm
30 Nm
90 Nm
90 Nm
Tighten the hex nuts to the specified torque.
The necessary torque for tightening the shoulder
screw varies depending on type.
Please refer to the following table for the correct
torque.
GK 21
DN50
GK 11
DN65,
DN80
GK 11
DN100
GK 11
DN150
4.5 Nm
20 Nm
20 Nm
20 Nm
Tighten the shoulder screw to the specified
torque.
Operation
Do not work on the equipment while it is operating.
If necessary, change the equipment settings.
