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FASANI BOLTED BONNET CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Bolted Bonnet Check Valves, Swing Check, Lift Check,
Tilting Disc Configuration, Flanged or Welded Ends
VALVE STORAGE
Preparation and preservation for sShipment
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:
1. 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 of the
valve 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. 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.
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
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.
Emerson.com/FinalControl VCIOM-01614-EN 17/06
© 2017 Emerson. All Rights Reserved
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FASANI BOLTED BONNET CHECK VALVES
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.
WARNING
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.
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.
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.
INSTALLATION
Preparation before installation
1. Carefully remove the valve from the
shipping package (box or pallet) avoiding any
damage to the valve.
2. The valves are shipped with the ends
protected with caps and a thin layer of
protective grease. Before installing the
valve, remove the caps and clean carefully,
then degrease both surfaces with a solvent.
Clean the inside of the valve by 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.
The arrow on the body identifies 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.
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FASANI BOLTED BONNET CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
25° max.
25° max.
Flow
FIGURE 2
Installation positions recommended
25° max.
Piston check
25° max.
Flow
0° to 90°
Swing check and tilting disc
25° max.
25° max.
Installation instructions
Check valves are normally installed in horizontal
pipe, but can also be installed in vertical pipe
with upward flow (not for piston check).
For a correct operation, Fasani recommends
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. Different positions from those indicated
may cause a non-correct valve operation, and/
or a quick deterioration of the valve.
Unless otherwise recommended by Fasani, the
valve should be installed with the disc in the
closed position, to ensure that the seat ring in
the disc is not damaged during installation.
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”
(page 1) and “Storage and Preservation before
Installation” (page 2).
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.
After the valve installation on the line and
before the line pressurization, the following
activities must be performed:
- all the threads plugs tightening shall be
verified
- the torque of the body-bonnet bolts shall be
verified.
See Table 1 (Bolt Torque Figures for BodyBonnet Flanged Connections)
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.
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FASANI BOLTED BONNET CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
TABLE 1 - BOLT TORQUE FIGURES FOR BODY-BONNET FLANGED CONNECTIONS
(Corresponding to approx. 40% of yield strength on dry steel surfaces)
Materials: A193 B7 / A193 B16 / A320 L7 Material: A193 B8
Nominal bolt
diameter(In.)
½ 9 66 90 3 19 26
⅝ 18 129 175 5 37 50
¾ 31 224 305 9 64 87
⅞ 50 358 487 14 102 139
1 74 533 725 21 152 207
1⅛ 107 772 1050 31 221 300
1¼ 149 1075 1462 43 307 418
1⅜ 201 1447 1968 57 413 562
1½ 263 1896 2579 75 542 737
1⅝ 339 2445 3325 97 699 950
1¾ 426 3072 4178 122 878 1194
1⅞ 527 3798 5165 150 1085 1476
2 642 4630 6297 183 1323 1799
2¼ 921 6640 9030 263 1897 2580
2½ 1271 9162 12460 363 2618 3560
2¾ 1537 11085 15076 439 3167 4307
3 2003 14447 19648 572 4128 5614
3¼ 2556 18428 25062 730 5265 7161
3½ 3201 23079 31387 914 6594 8968
Torque Torque Torque Torque Torque Torque
Kgm Ftlb Nm Kgm Ftlb Nm
Valve verification before start up
1. If the valve has been stored for a long time, check the bolt torque for bolting in accordance
with Table 1.
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.
TROUBLESHOOTING GUIDE
Symptom Possible cause Solution
Body-Bonnet leaking 1. Body-bonnet flange gasket bolting loose 1. Tighten bottom flange bolting
2. Gasket damaged 2. Replace gasket
Valve leaking 1. Valve not fully closed 1. Flush valve in order to close it
2. Debris trapped in valve 2. Cycle and flush (with valve open) to remove debris
3. Sealing surface damaged 3. Recondition the sealing surface
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FASANI BOLTED BONNET CHECK VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Operations instructions
The following instructions will help provide a
satisfactory and long life service of the bolted
bonnet check valves:
1. Make sure to perform periodic valve
verification as described in the next
paragraph.
Periodic valve verification during service
A Normal check
1. Verify monthly that there is no leakage from
the body/bonnet area. If the leakage has
been detected from the body/bonnet area,
tighten the nuts as indicated in Table 1.
If the leakage does not stop, follow the
maintenance procedure for the replacement
of the body/bonnet gasket (3.1).
B Preventive actions
1. Every 4 years disassemble the critical
service valves, verifying the sealing surfaces
and lap them again when necessary.
Substitute the bonnet gasket.
MAINTENANCE
The Fasani bolted bonnet check valves
have been designed to require minimum
maintenance.
- Body/bonnet flange gasket maintenance
All the other repairs should be performed by
Emerson or Nominated Service Company.
Body/bonnet flange gasket maintenance
WARNING
Before starting any maintenance, depressurize,
drain and vent the line; check that the valves are
not in temperature.
Failure to do so may cause serious personal injury
and/or equipment damage.
1. Before replacing the gasket, carefully clean
the flange surfaces.
2. Place the gasket in its seat and begin to
carefully position the bonnet flange. Position
it perfectly parallel to the gasket face; do
not use the bolts to obtain this alignment.
3. In case the coupling is vertical, position the
bonnet flange by means of a hoist; lock it
with four bolts placed at 90° on from the
other and tighten them until the flanges are
perfectly coupled in their seat. Insert all the
other bolts.
4. During tightening, make sure that the faces
of the flanges remain perfectly parallel.
5. Tighten the bolts in the sequence indicated
in fig. 3, using for the first turn a torque of
approx. ¼ of the maximum torque listed on
Table 1. For a better performance of the
joint, tighten again all the bolts after the
equipment has been pressurized.
CAUTION
The nuts need to be retightened after valve first
pressurization, as indicated in Table 1.
VALVE REMOVAL
If the valve needs to be removed from the line
for some extraordinary reason, the user should
ensure the following:
1. The valve is depressurized, drained and
vent;
2. The pipe shall be cut as far away from the
valve as possible (only for welded valves).
SPECIAL TOOLS
No special tool required for the maintenance
operation described in this Manual.
FIGURE 3
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Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Fasani is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson
and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.
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