SEMPELL PRESSURE SEAL GLOBE VALVES - STYLE A
InstallatIon and maIntenance InstructIons
Before installation these instructions must be fully read and understood
Handling requirements
A - Packed valves
Crates: Lifting and handling of the packed
valves in crates will be carried out
by a fork lift truck, by means of the
appropriate fork hitches.
Cases: The lifting of packed valves in cases
should be carried out in the lifting
points and at the center of gravity
position which have been marked. The
transportation of all packed material
must be carried out safely and
following the local safety regulations.
B - Unpacked valves
1. The lifting and the handling of these valves
has to be carried out by using appropriate
VALVE STORAGE
Preparation and preservation for shipment
All valves are properly packed in order
to protect the parts that are subject to
deterioration during transportation and storage
on site. In particular, the following precautions
should be taken:
The valves must be packed with the disc in the
closed position.
1a. Flanged sealing valves: the flange sealing
surfaces (raised faces) of the valves shall be
protected with suitable protective grease.
The end faces must be protected with
plastic or wooden discs fixed with straps.
1b. Buttweld end valves: the weld ends surface
shall be protected with suitable protective
like Deoxaluminite. The end shall be closed
with plywood or plastic disc fixed at the edge
by straps.
2. All actuated valves must be carefully
securely palleted or crated, in order to
ensure that the parts of actuator (especially
pneumatic piping or accessories) do not
extend beyond the skid/crate.
3. The type of packing must be defined in the
Customer’s Order and shall be appropriate
to ensure safe transportation to final
destination and eventual conservation
before installation.
means and at respecting the carrying limits.
The handling must be carried out on pallets,
protecting the machined surfaces to avoid
any damage.
2. With valves of large dimensions, the sling
and the hooking of the load must be carried
out using the appropriate tools (brackets,
hook, fasteners, ropes) and load balancing
tools in order to prevent them from falling
or moving during the lifting and handling.
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VCIOM-04589-EN 18/03
SEMPELL PRESSURE SEAL GLOBE VALVES - STYLE A
InstallatIon and maIntenance InstructIons
FIGURE 1
Valve slinging
Storage and preservation before installation
In case the valves have to be stored before
installation, the storage has to be carried out
in a controlled way, and has to be performed in
accordance with the following criteria:
1. The valves have to be stocked in a closed,
clean and dry storage room.
2. The disc must be in the closed position,
and the end faces must be protected with
plastic or wooden discs fixed with straps. If
possible, keep the original protection.
3. Periodical checks have to be carried out
in the storage area to verify that the above
mentioned conditions are maintained.
For actuated valves, in addition to the above,
please refer to the warnings in the manual of
the actuator.
NOTE
Storage in an open area for a limited period can be
considered only in case the valves have appropriate
packing (packed in cases lined with tarred paper, and
contents well protected with barrier sacks).
Do not place consignment packages directly on the
ground.
Do not expose consignment packages to the weather
or directly to the sun.
Check the packaging every two months.
CAUTION
For valve handling and/or lifting, the lifting
equipment (fasteners, hooks, etc.) must be sized
and selected while taking into account the valve
weight indicated in the packing list and/or delivery
note. Lifting and handling must be made only by
qualified personnel.
Do not use the lifting points located on the
actuator, if any, to lift the valve. These lifting
points are for the actuator only.
Caution must be taken during the handling to
avoid that this equipment passes over the workers
or over any other place where a possible fall
could cause damage. In any case, the local safety
regulations must be respected.
INSTALLATION
Preparation before installation
1. Carefully remove the valve from the
shipping package (box or pallet) avoiding any
damage to the valve or, in case of automated
valves, to the electric or pneumatic/
hydraulic actuator or instrumentation.
2. Clean the inside of the valve using an air
line. Ensure that there are no solid objects
such as pieces of wood, plastic or packing
materials within the valve or on the valve
seat.
3. Confirm that the materials of construction
listed on the valve nameplates (service and
temperature) are appropriate for the service
intended and are as specified.
4. Define the preferred mounting orientation
with respect to the system pressure.
If any (see arrow on the body), identify
the upstream side (high pressure) and
downstream side (low pressure).
WARNING
Verify that the direction of the flow in the line
corresponds to the arrow indicated on the valve
body.
See the actuator user manual for the actuator
preparation.
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SEMPELL PRESSURE SEAL GLOBE VALVES - STYLE A
InstallatIon and maIntenance InstructIons
FIGURE 2
Installation positions recommended
40° max.
135° max.
40° max.
40° max.
40° max.
Y pattern globe
Installation instructions
These valves can also be installed in vertical or
horizontal pipe with stem other than vertical,
but this may require special construction
depending on valve size, service condition,
material and type of operator.
For a correct operation, it is recommended
that the valve shall be installed and oriented
following the indications of Figure 2.
This can help minimize any problem associated
with solid particles present in the fluid that
otherwise could deposit in the lower part of
the body and be obstacle to the disc complete
closure.
Unless otherwise recommended, the valve
should be installed with the disc in the closed
position, to ensure that the seat ring in the disd
is not damaged during installation. Particular
care should be taken with those valves
equipped with ‘fail-open’ actuators.
For operating temperatures above 200°C
(392°F) thermal insulation of the valve body
is recommended.
Handling and lifting of the valves during
installation MUST be performed following the
same criteria and instructions described in
previous points “Handling requirements” and
“Storage and preservation before installation”.
Buttweld valves
Position the valve and check the alignment
with the pipe, then proceed with welding,
in accordance with the applicable welding
procedure.
Flanged valves
Place the valve between the two flanges of the
pipe and put the seal gasket between the valve
flange and the pipe flange; make sure that it is
correctly positioned. Then assemble the valve
to the pipe by the bolts which will be tightened
crossing. Progressively reach the requested
torque value indicated by the Engineering
Company that designed the plant.
45° max.
T pattern Globe Any globe
IMPORTANT
If piping system is pressurized with water for
testing, and in case the piping system has been
shut down after testing for a long time, the
following recommendations should be adopted.
a. Use corrosion inhibitor with water to pressurize
the piping system
b. After testing, the piping system should be
depressurized and the test water completely
drained.
IMPORTANT
After the valves installation and before the line
testing, it is recommended to perform an accurate
cleaning of the lines to eliminate dirt and any
foreign objects that could seriously jeopardize
the tightness between seat/disc and the correct
operation of the valve.
Valve verification before start up
1. Tighten the packing just enough to prevent
stem leakage. Over-tightening will decrease
packing life and increase operating torque.
The bolt torque figures for the packing bolts
can be calculated as indicated in Table 1.
2. Check the operation of the valve by stroking
it to “full open” and “full close”.
3. If the valve has been stored for a long time,
check the bolt torque for bolting (pos. 31) in
accordance with Table 2.
Operations instructions
1. Style B Series globe valves do not require
special care to work properly.
The following instructions will help provide
a satisfactory and long life service.
2. Make sure to perform periodic valve
verification as described in paragraph
"Periodic Valve Verification" at page 4.
3. In case of actuated valves always follow the
specific instructions given by the actuator’s
manufacturer.
4. Never change the setting of torque and/or
limit switches which have been carefully set
during the final test at workshop.
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