The purpose of this manual is to ensure that the valves
supplied are properly installed and maintained to give
trouble free performance
.
This manual covers FNW single piece body bu
valves from 2” to 72” in both wafer, lug and double
anged designs.
1.4 Marking.
Speci cations of the valve are marked on the body or on
name plate or both, prior to shipment. The identi
marking generally consists of size of valve, pressure rating
body material, trim material, serial number and the
manufacturing date.
1.2 General Design.
The FNW Butter y valves are tight shu
with wafer or lugged body construction. The valves
Name Plate
are design & manufacture generally conforms to the
requirements of API 609 / EN 593 / MSS SP-68
.
standards
The valves are bi-directional. The valve
seat enveloping the entire wetted surface and the
ange contact face of the body.
1.3 Flange and Pipe compatibility :-
Butter y valves are designed to t between schedule
40 (for class 150) & schedule 80 (for class 300) &
above 100 (for class 600) pipe, and the following pipe
6Disc SpacerSS TYPE 31619Bottom FlangeCARBON STEELSS TYPE 304
7BearingBEAR - X/SS 316 + PTFE / HT 31620Washer SS TYPE 304
8Wedge Pin17-4 PH21StudGR. B8
9Retainer ScrewA4-70 (SS316)22Hex NutGR. 8
MRTFE (2” TO 24”)
FIRESAFE - SS316 (2” TO 24”)
METAL-SS316/INCONEL 625 (2” TO 24”)
A564 17-4PH / A479 TYPE 316
A479 XM-19
SS TYPE 304/SS
TYPE 316
13Snap RingSTAINLESS STEEL
14Gland FlangeCARBON STEELSS TYPE 304
15Gland Flange StudGR. B8
16Belleville SpringSTAINLESS STEEL
17Nyloc NutA2-70 (SS304)
18GasketPTFE / GRAPHITE
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INSTALLATION, OPERATION & MAINTENANE INSTRUCTIONS
3 Safety Precautions.
3.1 Do not exceed the valve pressure /
temperature rating limitations!
• Exceeding the pressure/temperature rating
limitations marked on the valve may result in major
damage or Personal injury. Users of these valves
should ensure that the valve pressure / temperature
is less than or equal to the rated
pressure/temperatures. If required, end user should
incorporate appropr
the system for the safe operation of the valve.
3.2 Use the valve for speci ed application only!
iate limiting/monitoring devices in
• User to ensure that the valve is used only for the
speci
ed application as agreed between the
manufacturer and the purchaser.
3.3 Follow the safety rules and regulations!
• User of the valve must be aware of all the safety
rules and regulations related to a particular
environment in which the valve is to be used.
4 Transportation, Receiving and Storage.
4.1
Valves are being packed in cartons, boxes or pallets
while shipping to the customer. Care should be taken to
store them in a suitable place. We recommend storing
the valves indoors in a dry and dust free atmosphere
(Refer to
that the valves and any other accessories have not been
damaged during transportation. Avoid mechanical
damage to the valve seat during storage. Rubber lined
valve must not be stored for more than 2 years without
installation, unless speci
gure 2.1). W hile unpacking the valves, check
ed otherwise.
3.4 Do not disassemble the valve or remove it
from the pipeline while the valve is
pressurized!
• Disassembling 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 media
before dismantling the valve.
• Be aware of the type of media involved. Protect
people and the environment from any harmful or
poisonous substances.
•
Make sure that no dust, dirt can enter the pipeline
during the valve maintenance
.
3.5 When handling the valve or the valve
package, bear in mind its weight!
• Never lift the valve or valve package by the handle,
gear operator, actuator or hand wheel. Place the
rope securely around the valve body while handling
the valve. Refer to Fig No. 1.2
Fig 2.1 Storing the Valve.
• Caution:
Placing the valves directly on the ground or on a
concrete
oor should be avoided!
All wrapping and protection on the valves should not be
4.2
removed until the valve is ready for installation.
4.3
If the valves are stored for a long time, then all the valves
should be cleaned and hydro / pneumatic tested before
installation. Refer to General Arrangement drawing,
which lists the appropriate testing standards, or consult
the nearest branch o
ce / factory for more information
Valves are bi-directional and can be installed in either
4.4
direction.
Lever or hand wheel of gear operator for respective
4.5
valves are packed loosely and kept in the same box, in
which the valve is packed (wherever applicable). When
handling the valve either by hand or by mechanical
means, special care should be taken not to damage the
as sho
Fig 1.2 Lifting of the Valve
lever or gear operator. Lift the valve only
1.2. Lifting the valve from any other location may
damage the valve components.
5.2 Valve open or close position is indicated on the notch
5.0 Installation
5.1 When removing the valve from storage a careful
check should be made to ensure that the valve has
not been damaged during the storage period.
5.5 Valve should be checked for identication purpose and
ensure that characteristics of valve matches to those
specied for piping specications, for the line w here that
is to be mounted. Nameplate instructions will give the
plate for lever operated valves or on the top of
the gear operator for gear operator operated valves
necessary information.
5.3 Center valve, span body with bolts, but do not tighten.
Slowly open disc to ensure that it clears adjacent pipe
ID and leave at full open position. Tighten bolts in a cris
cross pattern refer g 3.5.
Fig 3.3 Valve Alignment
Fig 3.1 Lug Valve Installation
5.4 For ange welding center valve, span bolts, align this
5.6 Use ange gasket & Install valve between
anges in closed condition.
assembly in pipe and tack weld anges to pipe. After
tack welding, remove valve and nish welding.
Fig 3.4 : Installation of valve into pipe line
Fig 3.2
Note:
a)
Do not attempt to correct the line misalignment by means of ange bolting Ref to g 3.3.
b) Use ange gaskets Ref to g 3.4.
c) Valves shall never be mounted with the operator vertically downwards.
5.7 Recommended Bolt Tightening Sequence:
Place the valve between the anges, center it and then span the valve body with all ange bolts, but do not
tighten the bolts. Carefully open the disc to the full open position, making sure the disc does not hit the adjacent
pipe I.D. Now systematically remove jack bolts or other ange spreaders, and hand-tighten the ange bolts as
shown in g.3.5 Very slowly close the valve disc to ensure disc edge cl
earance from adjacent pipe ange I.D.
Now open the disc to full open and tighten all anges bolts as per specication as shown in g. Finally, repeat a
full close to full open rotation of the disc to ensure proper clearance.
Fig 3.5: Initial Centering & Flanging of Valve
5.8 Insulation / lagging of the valve and pipeline outside diameter is recommended, where uid
temperatures are going to be higher than 150
It is recommended to use ASTM A193 Gr.B7 fasteners for ange bolting.
Note:
o
C.
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