11
CAUTION
Hot surfaces and heat radiation present
the risk of burns.
Wear protective gear that is suitable
for the temperatures generated in your
plant.
If you want to use the equipment in air-conditioning,
cooling or cryogenic installations, provide the
equipment with diffusion tight insulation.
Attention!
Malfunctions may occur if the equipment is
iced up.
Insulate the whole equipment.
If necessary, also insulate the
handwheel.
Use suitable insulating material.
The type of insulating material depends on the fluid
temperature.
For more information on suitable insulating
material please contact the manufacturer.
After installation ensure that the equipment is fully
functioning.
Fully open and close the valve several times.
After putting the equipment into operation make
sure that neither the equipment nor any
connections leak.
Should you encounter any leaks please proceed as
follows:
Attention!
Damage may occur if the equipment was
distorted during installation.
To open the equipment turn the
handwheel two turns anticlockwise.
Slowly fasten the cover bolts in
diagonally opposite pairs.
The tightening torque for the locking nuts for the
cover and the size of the bolts depend on the type
of equipment.
DN
Tightening torque [Nm] Bolt
15–32
25
M10
40–50
35
M12
65 50
M12
80–150
110
M16
Tighten the nuts and bolts of the cover in
diagonally opposite pairs to the specified
torques.
After putting the equipment back into operation
make sure that neither the equipment nor any
connections leak.
Please contact the manufacturer if the
equipment and/or connections are untight.
