3 R 71 EN - Issue 9/2020
5
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 the position determined by the
spring.
3 INSTALLATION AND
COMMISSIONING
3.1 General
Remove the flow port protectors and check that the valve is clean
inside.
3.2 Installing in 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 segment sealing surface and seats.
The valve has an arrow indicating the flow direction. Install the valve
in the pipeline so that the flow direction of the pipe corresponds to
that marked on the valve. The mounting position does not place
restrictions on operation of the valve, actuator or positioner. You
should, however, avoid installing the valve so that the shaft points
downwards because impurities travelling in the pipeline may then
enter the body cavity and damage the gland packing. See Fig. 7.
Choose flange gaskets according to the operating conditions.
Do not attempt to correct pipeline misalignment by means of flange
bolting.
Stress caused in the valve by pipeline vibration can be reduced by
supporting the pipeline properly. Reduced vibration also helps ensure
correct functioning of the positioner.
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
pipeline 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 yourself and
the environment from any harmful or poisonous substances.
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 segment 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 segment functions as a cutting
device. The segment position may also change when the valve is
moved. Close and detach the actuator pressure supply pipeline
for valve maintenance. Failure to do this may result in damage or
personal injury.
CAUTION:
Protect yourself from noise!
The valve may produce noise in the pipeline. The noise level
depends on the application. It can be measured or calculated
using the Neles Nelprof software. 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, take its
weight into account!
Never lift the valve or valve package by the actuator, positioner,
limit switch or their piping.
Place the lifting ropes securely around the valve body (see
Fig. 7). Damage or personal injury may result from falling parts.
Fig. 6
Lifting the valve
CAUTION:
When handling the valve or the valve package, take its
weight into account!
