4
2 L1 71 en
1.8
Safety precautions
2
TRANSPORTATION, RECEPTION AND
STORAGE
Check the valve and the accompanying devices for any
damage that may have occurred during transport.
Store the valve carefully before installation, preferably
indoors in a dry place.
Do not take the valve to the intended location and do not
remove the flow port protectors until the valve is installed.
The valve is delivered in the closed position. A valve
equipped with a spring-return actuator is delivered in a
position determined by the spring. During storage the
valve must be lightly closed.
3
INSTALLATION
3.1
General
Remove the flow port protectors and check that the valve is
undamaged and clean inside.
3.2
Mounting into the pipeline
Flush or blow the pipeline carefully before installing the
valve. Foreign particles, such as sand or pieces of welding
electrode, will damage the disc sealing surface and seat.
The valve may be installed in any position and offers tight-
ness in both directions.
Install the valve in the pipeline so that the shaft is horizon-
tal, if possible. However, we do not recommend installing
the valve with the actuator on the underside because dirt in
the pipeline may then enter the body cavity and damage
the gland packing.
If the valve is equipped with a flow balancing trim (type code
S-...), it must be on the downstream side of the valve body.
The valve must be mounted so that the perforated plate will
not collect any impurities in the pipeline (see Fig. 4).
Select flange gaskets according to the operating conditions.
Do not attempt to correct pipeline misalignment by means
of flange bolting.
It may be necessary to firmly support the pipeline to pro-
tect the valve from excess stress. Sufficient support will also
reduce pipeline vibration and this ensures proper function-
ing of the positioner. Do not fasten supports to the flange
bolting or to the actuator.
CAUTION:
Do not exceed the valve performance limitations!
Exceeding the limitations marked on the valve may cause
damage and lead to uncontrolled pressure release.
Damage or personal injury may result.
CAUTION:
Do not dismantle the valve or remove it from the pipe-
line while the valve is pressurized!
Dismantling or removing a pressurized valve will result in
uncontrolled pressure release. Always isolate the relevant
part of the pipeline, release the pressure from the valve
and remove the medium before dismantling the valve. Be
aware of the type of medium involved. Protect people and
the environment from any harmful or poisonous sub-
stances. Make sure that no medium can enter the pipeline
during valve maintenance.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of the discs cutting movement!
Keep hands, other parts of the body, tools and other
objects out of the open flow port. Leave no foreign
objects inside the pipeline.
When the valve is actuated, the disc functions as a cutting
device. The position of the disc can also be changed when
moving the valve.
Close and detach the actuator pressure supply pipeline for
valve maintenance.
Failure to do this may result in damage or personal injury.
CAUTION:
Beware of noise emissions!
The valve may produce noise in the pipeline. The noise
level depends on the application. It can be measured or
calculated using Metso Nelprof computer program.
Observe the relevant work environment regulations on
noise emission.
CAUTION:
Beware of a very cold or hot valve!
The valve body may be very cold or very hot during use.
Protect yourself against cold injuries or burns.
CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
Never lift the valve or valve package by the actuator, posi-
tioner, limit switch or their piping.
Valve sizes DN 350 and over are equipped with a lifting
eye bolt.
Place the lifting ropes securely around the valve body (see
Fig. 3).
Damage or personal injury may result from falling parts.
NOTE:
Do not turn the disc more than 90° as this could damage
the seat. The valve is so constructed that the disc operates
only between 0-90°.
CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
Follow the lifting methods shown in Fig. 3.
Fig. 3.
Lifting of the valve
