CMO VALVES T-TAPPI Series Instructions for use

1manufacturing the valve you need
INSTRUCTIONS AND MAINTENANCE MANUAL - T-TAPPI SERIES -
T-TAPPI
Rev. 04 / 18-10-2021
KNIFE GATE VALVE - SERIE T-TAPPI

2manufacturing the valve you need
KNIFE GATE VALVE - T-TAPPI SERIES
Rev .04 / 18-10-2021
2
ASSEMBLY
DIRECTIVES
Pressure Equipment Directive::
(PED) ART 4.3 /CAT.1
Potential Explosive Atmospheres Directive (optional):
(ATEX) CAT.3 ZONA 2 y 22 GD.
The T-TAPPI valve complies with the Directive on Equipment and Protective Systems for Potentially Explosive Atmospheres. In
these cases the logo will appear on the identification label. This label shows the exact classification of the zone in which the valve
can be used. The user is responsible for its use in any other zone.
HANDLING
When handling the equipment please pay special attention to the following points:
• SAFETY WARNING: Before handling the valve, check that the crane to be used is capable of bearing its weight.
• To prevent damage, especially to the anticorrosive protection, it is recommended to use soft straps to lift the CMO knife gate
valves. These straps must be fitted around the top of body.
• Do not lift the valve or hold it by the actuator. Lifting the valve by the actuator can lead to operating problems as it is not
designed to withstand the valve’s weight.
• Do not lift the valve by holding it in the flow passage area. The valve’s seal is located in this area. If the valve is held and
lifted by this area it can damage the surface and the O-ring seal and lead to leakage problems whilst the valve is operating.
• Packing in wooden boxes: If the equipment is packed in wooden boxes, these must be provided with clearly marked holding
areas where the slings will be placed when securing them. O In the event that two or more valves are packed together,
separation and securing elements must be provided between them to prevent possible movements, knocks and friction
during transport. When storing two or more valves in the same box you must ensure they are correctly supported to pre-
vent deformations. In the case of dispatches by sea we recommend the use of vacuum bags inside the boxes to protect the
equipment from contact with sea water.
• Pay special attention to maintaining the correct levelling of the valves during loading and unloading as well as during trans-
port to prevent deformations in the equipment. For this purpose we recommend the use of mounts or trestles.
INSTALLATION
In order to avoid personal harm and other type of damage (to the facilities, the valve, etc.) please follow these instructions:
• The sta responsible for the installation or operation of the equipment must be qualified and trained.
• se suitable Personal Protective Equipment (PPE) (gloves, safety boots, goggles…).
• Shut o all lines that aect the valve and put up a warning sign to inform about the work being performed.
• Completely isolate the valve from the whole process. Depressurise the process.
• Drain all the line fluid through the valve.
• Use hand tools not electric tools during the installation and maintenance, in accordance with EN13463-1(15).
Before installation, inspect the valve to ensure no damage has occurred during transport or storage. Make sure that the inside
of the valve body and, in particular, the seal area are clean. Inspect the installation’s pipes and the flanges to make sure they are
clean.
ASPECTS TO BE CONSIDERED DURING ASSEMBLY
The T-TAPPI valve is unidirectional and an arrow is marked on the body indicating the flow direction. The word SEAT is also mar-
ked on one side of the body (near the packing gland) to indicate the side where the sealing joint is located.
As standard, when the valve operates with clean liquids or with low solid content it is recommended to install it so that the
pressure pushes the gate against the seat. That way, the fluid direction will be the same as the direction indicated by the arrow
on the body (fig. 1).

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KNIFE GATE VALVE - T-TAPPI SERIES
Rev .04 / 18-10-2021
Special care must be taken to respect the correct distance between the flanges and ensure they are correctly aligned and parallel
(Fig. 2).
The incorrect position or installation of the flanges can cause deformations on the valve’s body and this could lead to operating
problems.
Correct parallelism
and alignment
DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 750 800 900 1000 1100 1200
ND 2" 2¹⁄₂" 3" 4" 5" 6" 8" 10" 12" 14" 16" 18" 20" 24" 28" 30” 32" 36" 40" 44” 48"
P10 10 12 12 12 17 16 19 19 28 28 28 34 26 25 23 22 21 21 25 30
Table. 1
fig. 2
fig. 1
It is very important to make sure that the valve is correctly aligned and parallel to the flanges
to prevent leakages and avoid deformations. Ensure the valve is assembled in open position.
Los tornillos de los agujeros roscados ciegos, tendrán una profundidad máxima y nunca
llegarán al fondo del agujero.
The screws in the tapped blind holes will have a maximum depth (Fig. 3) and will never reach
the bottom of the hole. The following table (table 1) shows the maximum thread depth in the
holes and the maximum torque to be applied to the flange screws:
fig. 3
• The equipment must be firmly installed in the pipe. It will be joined to the duct with a screw joint.
• The screws and nuts to be fitted must also be suitable for the operating conditions and their measurements must in
accordance with the approved plans. The screws and nuts must be fitted diametrically. To torque to apply to the fastening
screws and nuts must be correct according to the applicable standard, we recommend the initial assembly be carried out
with a low tightening torque and after all the screws are in place, the final torque is applied. As regards scaolding, ladders
and other auxiliary elements to be used during the assembly, follow the safety recommendations indicated in this dossier.
• Once the equipment has been assembled make sure that there are no elements, whether interior or exterior, which can
interfere with the gate valve’s movement.
• Make the relevant connections (electrical, pneumatic, hydraulic) in the equipment’s drive system
• following the instructions and wiring diagrams supplied it.
• The operation of the equipment must be coordinated with the site’s control and safety sta and no modifications are
permitted in the equipment’s external indication elements (limit switches, positioners, etc.).
• When operating the equipment follow the safety recommendations indicated in this dossier.

4manufacturing the valve you need
KNIFE GATE VALVE - T-TAPPI SERIES
Rev .04 / 18-10-2021
In horizontal pipes it is recommended that CMO valves be assembled in vertical position, although otherassembly positions are
also possible.
Position 1: This is the most advisable
Position 8: The valve can be installed in this position but you are advised to contact CMO if this is necessary.
Positions 2, 3, 6 and 7: For large valves (more than DN300), the maximum angle with the installation vertical is 30º. For
smaller sizes the angle can be increased up to 90º (positions 4 and 5). When it is necessary to install large valves in any of these
positions, it is recommended to consult CMO, as in these cases, due to the weight of the actuator, a suitable support must be
made to prevent deformations and operating problems in the valves.
Positions 4 and 5: For smaller sized valves, the valves can be installed in these positions. To install larger valves (more than
DN300) in any of these positions, please contact CMO. In these cases, due to the weight of the actuator, a suitable support must
be made to prevent deformations and operating problems in the valves.
ASSEMBLY POSITIONS (horizontal pipe)
fig. 4

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KNIFE GATE VALVE - T-TAPPI SERIES
Rev .04 / 18-10-2021
CMO valves can be assembled in all positions; however, certain
aspects must be taken into account:
Positions number 1,2 and 3: In these positions, it is recommended to
make a suitable support, because, due to the weight of the actuator,
deformations may arise and this can lead to operating problems in
the valve. Once the valve has been installed, check that all the screws
and nuts have been correctly tightened and that the whole valve
action system has been correctly adjusted (electrical connections,
pneumatic connections, instruments,…). All CMO valves are tested at
its facilities, however, during the handling and transport the screws on
the packing gland can come loose and must be re-tightened. Once
the valve is installed in the pipeline and it has been pressurised, it is
very important to check for any leakages from the packing gland to
the atmosphere. In the event of a leakage, tighten the nuts on the
packing gland crosswise until the leakage stops, ensuring that there
is no contact between the packing gland and the gate. A very high
tightening torque on the packing gland’s nuts can lead to problems,
such as an increase in the valve’s torque, reduction in the packing’s
working life, or the breaking of the packing gland. The tightening
torques are indicated in Table 2).
ASSEMBLY POSITIONS (vertical/inclined pipe)
fig. 5
Once the valve is installed in its place, check that the flanges and electrical and pneumatic connections are secure. If the valve has
electrical accessories or you are in an ATEX zone, earth connections must be made before operating it. If you are in an ATEX zone,
check the continuity between the valve and the pipeline (EN 12266-2, annex B, points B.2.2.2. and B.2.3.1.). Check the pipeline’s
earth connection and the conductivity between the outlet and inlet pipelines.