SEMPELL
Operating and Safety Instructions
Control Valves
Before installation these instructions must be fully read
and understood
WARNING!
For safety reasons, it is important to take the
following precautions before you start work on
the valve:
1. Personnel making any adjustments to the
valves should utilise equipment and clothing
normally used to work with the process
where the valve is installed.
2. The line must be depressurised, drained,
cooled down and vented before installing the
valve.
3. Handling of all valves, operators and
actuators must be carried out by personnel
trained in all aspects of manual and
mechanical handling techniques.
4. Ensure the valve pressure/temperature
limitations marked on the identification label
are above or equal to service conditions.
5. It is possible, in some valve designs, for
sealed cavities within the valve body to
be filled with liquid, for example during
hydrostatic test. If this liquid is not released,
by partially opening the valve or some other
means, and it is subject to a temperature
increase, excessive pressure sufficient
to cause pressure boundary failure can
be generated. Where such a condition
is possible, it is the responsibility of the
purchaser to provide, or require to be
provided, means in design, installation,
or operating procedure to assure that the
pressure in the valve will not exceed that
allowed by the pressure rating of the valve.
Storage / Protection / Selection
Storage
When Sempell control valves are to be stored for some time before being fitted, storage should be in the
original delivery crates with any waterproof lining and/or desiccant remaining in place. Storage should be off
the ground in a clean, dry, indoor area. If storage is for a period exceeding six months the desiccants bags
(if supplied) should be changed at this interval. If valves are stored for longer than 12 months they should be
inspected by Sempell personnel before installation.
Protection
Sempell control valves are delivered with protection according to customer’s specification, or in accordance
with the Quality Assurance Manual. To protect the valve buttweld profiles (if applicable) from damage
wrapping and/or covers should be left in place until immediately before fitting to the pipe.
Selection
Ensure the valve’s materials of construction and pressure/temperature limits shown on the identification plate
are suitable for the process fluid and conditions. If in doubt contact Sempell.
Installation
1. Sempell control valves are bi-directional unless fitted with a flow direction arrow. If a directional arrow is
fitted than the valve must be installed with the arrow pointing in the direction of the flow.
2. Unless specifically stated on the general arrangement drawing, installation may be carried out with stem
displaced through any angle or any angle permitted by the bolt holes, if flanged connection.
3. Remove protective covers from valve end faces and protection applied to the valve stem (if applicable).
4. For flanged valves ensure that mating flanges and gaskets are clean and undamaged. For buttweld valves
ensure that the weld profile is clean and in a suitable condition for welding.
5. Should there be any possibility of abrasive particles (weld slag, sand, chemical clean residue etc.) within
the piping system, this could damage valve seating. The system needs to be thoroughly flushed / blown out
clean prior to operation.
6. If valve ends are flanged, ensure pipe mating flanges are aligned correctly, bolting should be easily inserted
through mating flange holes. Tighten the flange bolts in a diagonal pattern.
7. Fit the valve into pipework ensuring easy access of the operating mechanism (handwheel, actuator) if
applicable.
8. Welding and heat treatment temperature limitations (if applicable) will be stated on the general
arrangement drawing. Consideration must be given to these limitations.
9. All valves must be partially opened prior to welding.
10. Refer to point 5 flushed clean: Usually used valve materials are resistant against pickling fluids (as the pipe
material is). If required, check resistance to pickling with pickling company. If necessary, disassemble valve
inserts and replace by special pickling inserts. Protect sensitive places by varnish or coverplates.
Note: Damages can also occur during flushing with high speed by foreign bodies, e.g. at valve seats. Move
valve into open position and do not actuate during pickling and flushing. The pickling process has to take
place uninterrupted. Do prevent unnecessary long impinge of the pickling fluid. Remove pickling fluid
completely, e.g. by flushing. Thereby take special care to dead spaces in valves and dead pipe sections
(perform inspection if necessary).
Replace gaskets and gland packing coming in touch with the pickling fluid, carefully clean sealing areas
before replacement.
11. Check gland / pressure bolts before operation (during start up, or even in service bolt tension may decrease
or even drop).
12. Sempell does not accept liability when a/m regulations, instructions and warning indications are not
observed and adhered to.
Operation & Routine Maintenance
Read all warning labels fitted to the valve before operation or maintenance!
Scope
Sempell control valves are operated manually or
by an external operator (electric / pneumatic /
hydraulic).
Operation
All handwheel operated valves, including valves
operated by electric actuator, are ‘clockwise to
close’. The closed position is indicated by the
‘shut’ indicator on the valve as well as the indicator
arrow on the electric actuator (if fitted). Actuator
torque/travel switches are set at the factory prior to
shipment but must be checked prior to operation
according the actuator sizing sheet (if applicable)
Emerson.com/FinalControl © 2017 Emerson. All rights reserved.
Do not use additional force, for example the use of
a wrench on the handwheel, to operate a valve.
Routine Maintenance
If valves are fitted with grease nipples then grease
should be applied at 3 month intervals using Shell
Alvania R.A., grease of equivalent (see Sempell
lubricant list). Exposed, threaded, operating stems
should have grease applied at similar intervals.
Lubricate any actuators, gearboxes according to
individual manufacturers instructions.
No other routine maintenance is required other than
periodic inspection to ensure satisfactory operation
and sealing.
Any sign of leakage form the gland packing should
ue
and evenly. If no further adjustment is possible or
seat leakage is suspected, the valve will require
a complete overhaul. This should be carried out
after depressurisation and in accordance with the
relevant Sempell maintenance instruction. Only
Sempell spares should be used.
Spare Parts
Sempell valves are identified by the order number
which is stamped on the identification plate. This
reference should be quoted in respect of any after
sales queries, spare parts or repair enquiries /
orders.
ut notice SEMDR-0009-EN-1305
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