SVF VB41 Series Owner's manual

Series VB41 Control Ball Valve
www.SVF.net
IOM-VB41
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES VB41 BALL VALVES
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GENERAL
SVF Ball valves have been designed and engineered to
provide long lasting and trouble free service when used
in accordance with the instructions and specifications
herein.
The following instructions refer only to SVF Series VB41
Control “V” Port Ball Valves.
Keep protective cover in place until moment of
installation. Valve performance depends upon
preventing of damage to ball surface. Upon removal
of cover, make sure that the valve is completely open
and free of obstruction.
If requested, valves can be shipped from the factory
containing a silicon based lubricant which aids in the
assembly of the valve. This may be removed with a
solvent if found intolerable.
Certain ferrous valves are phosphate and oil dipped
during the course of manufacture, but they are
completely non-toxic and the valves are quite safe to
use for edible or potable products.
STORAGE:
All manual valves are shipped in the fully open position
with protective end caps (covers). Keep all protective
packaging, flange covers, or end caps attached to
the valves during storage. To avoid damage to the seat
due to contact with the balls edge, leave the valve in
the fully open or closed positionduring storage. It is
recommended to keep the valves in a clean and dry
environment until ready for use.
!!!CAUTION! Safety Precautions!!!
Before removing valve from pipeline NOTE that:
Media flowing through a valve may be corrosive,
toxic, flammable, a contaminant or harmful
nature. Where there is evidence of harmful fluids
having flowed through the valve, the utmost care
must be taken. It is suggested that the following
minimal safety precautions be taken when
handling valves.
1. Always wear eye shields.
2. Always wear gloves and overalls.
3. Wear protective footwear.
4. Wear protective headgear.
5. Ensure that running water is readily accessible.
6. Have a suitable fire extinguisher ready if media
is flammable.
7. Be sure that you are aware of the fluid that has
been passing through the valve before opening or
dismantling any valve. Require MSDS information.
By checking line gauges ensure that no pressure
is present at the valve.
Ensure that any media is released by operating
valve slowly to half open position. Ideally, the valve
should be decontaminated when the ball is in the
half open position.
These valves, when installed, have body connectors
which form an integral part of the pipeline and
the valve cannot be removed from the pipeline
without being dismantled.
Valves and accessories must not be used as a
sole support of piping or human weight. Safety
accessories such as safety relief (overpressure)
valves are the responsibility of the system designer.
It is the user/system designer’s responsibility to use
insulation in high temperature applications. Refer
to OSHA documents for more details.
VB41 Automated Package
(2” Valve shown with
aero
2
Actuator & SVF Positioner)
30OV Ball
60OV Ball

Series VB41 Control Ball Valve
www.SVF.net
IOM-VB41
INSTALLATION
The valve must be installed for flow or vacuum in one
direction (Arrow on side of body denotes direction of
flow). Carefully exclude pipe sealants from the valve
cavity. When installing, use standard gaskets suitable
for the specific service. Tighten flange bolts or studs
evenly.
OPERATION
SVF valves provide excellent modulating control when
used under normal conditions and in accordance with
SVF’s published pressure/temperature chart.
SVF valves have 1/4 turn operation closing in a
clockwise direction.
Any media which might solidify, crystallize or
polymerize should not be allowed to stand in the ball
valve cavities unless regular maintenance is provided.
If minimal maintenance is required, SVF offers steam
jacketed ball valves.
TORQUE REQUIREMENTS
Torque ratings are subject to variations depending on
the length of time between cycles and the media in
the system.
Breakaway torque is that force which must be exerted
to cause the ball to begin to open. Operating torque
requirements will vary depending on the length of time
between cycles, media in the system, line pressure
and type of valve seat.
MAINTENANCE
With self-wiping ball/seats, SVF valves have a long,
trouble free life, and maintenance is seldom required.
But, when necessary, valves may be refurbished,
using a small number of components, none of which
require machining.
SVF valves are designed for easy service and assembly
in the field. The following checks will help to extend
valve life, or reduce plant problems.
SVF Ball Valves utilize live-loaded stem seals featuring
Belleville washers (disk springs) that maintain constant
pressure on the packing area even under a wide
range of pressure and temperature fluctuations. If stem
leakage is evident proceed as follows:
STEM LEAKAGE*
Examine the disk springs (Belleville washers) for
damage. If in good condition tighten the gland nut
until disk springs are firmly compressed, then back nut
off 1/16th of a turn. If damaged, dismantle the stem
down to the gland, fit new disk springs with their outer
edges touching, replace and retighten using gland
nut. Further maintenance necessitates dismantling of
the valve.
LEAKAGE AT END CAP JOINT*
Check for tightness at the End Cap connector. If loose,
tighten End Cap. Excessive force will damage the End
Cap. Follow the torque values listed in Table A, Page 4.
If there is still leakage it will be necessary to dismantle
the valve and replace the body seal.
IN-LINE LEAKAGE
Check that valve is fully closed. If leakage occurs while
the valve is in the closed position, a seat or ball sealant
surface may be damaged and it will be necessary to
disassemble the valve.
*NOTE: Stem leakage and leakage at the end cap
joint, if not cured by simple means described above,
may necessitate dismantling valve. If there is no stem
leakage the stem assembly should not be touched.
2
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES VB41 BALL VALVES

Series VB41 Control Ball Valve
www.SVF.net
IOM-VB41
REBUILDING
Before rebuilding, check that all the correct components
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When rebuilding, cleanliness is essential to allow long
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CAUTION: NO BODY OR STEM SEALS ARE REUSABLE. Care
must be taken to avoid scratching the seats and seal
during installation.
Note: Caution must be taken with valves that have been
in hazardous media. They must be decontaminated
before disassembly by relieving the line pressure and
flushing the line with the valve in the partially open
position. Protective clothing and face shields, gloves,
etc.MUST BE USED for this operation. Remove any
accessories attached to the valve before attempting
disassembly of valve.
A DISASSEMBLY OF VALVE (Removed from line)
1.) With the valve in the open position, undo Body
Bolt Nuts (#14) to separate valve Body (#1) and
End Cap (#2).
2.) Once the Body (#1) and End Cap (#2) have
been separated, remove the Body Seal (#6).
3.) Make sure the Ball is in the closed position, thus
the Ball (#3) can be taken out easily from the
Body (#1).
4.) Once the Ball (#3) is removed from the
Body (#1), take out the Seats (#5).
B REMOVING STEM ASSEMBLY - 2”
1.) If manually operated, remove the Handle (#14)
by removing the Handle Nut (#15).
2.) Remove the Handle Glands (#13), Tab Lock
(#12), Stem Nut (#11), Belleville Washers (#10),
Gland (#9), Bushing (#8) and Stem Seals (#7).
B-1 REMOVING STEM ASSEMBLY - 3” to 6”
1.) Loosen Set Screw (#26) on Handle Adapter
(#25) to remove the Pipe Handle (#27) and
Triangular Stopper (#22).
2.) Remove Tab Lock (#12), Stem Nut (#11),
Belleville Washers (#10), Gland (#9), Bushing
(#8), and Stem Seal (#7).
3.) Push the Stem (#4) down into the body
cavity to remove, once removed take off the
O-Ring (#19) and Thrust Washer (#20).
C INSPECTION
1.) The ball and the surfaces of the seats should
be free of pit marks and scratches. Light
marring from the action of the ball against the
seats is normal and will not affect the operation
of the valve.
2.) The stem, thrust bearing, steam seal and
surrounding body surfaces should be free of
pit marks and scratches.
D REASSEMBLY
1.) Apply an adequate amount of lubricant,
compatible with the media being handled,
around the Ball (#3), Seats (#5), Body
Seal (#6), Stem (#4), and Thrust Washer (#20).
2.) For stem reassembly, disassembly procedure
should be followed in reverse order.
3.) When stem assembly is complete, tighten Stem
Nut (#11) according to the values in Table A.
4.) Insert a Seat (#5) into the Body (#1) followed
by the Ball (#3) making sure the Stem (#4) in
the close position so that stem slot engages
with the tang at the base of the stem. Make
sure the ball’s “V” Port is in the downstream
direction, when open, as indicated by the
directional arrow ( ) on the valve body.
5.) Make sure Body Seal (#6) rests squarely on
center seal surface of the body.
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Make sure the seats rest firmly on the back
surface of each recess.
7.) Insert and tighten Body Bolts(#13) and Body
Nuts (#14) diagonally, in accordance to the
cross pattern procedure.
8.) In the final assembly step ensure that body
bolts are tightened accordingly to the
torques values in Table A.
See Page 5 for additional information on installing
the valve handle.
3
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES VB41 BALL VALVES

Series VB41 Control Ball Valve
www.SVF.net
IOM-VB41
TABLE A: TORQUE REQUIREMENTS (in-lbs)
REPAIR KITS
Repair Kits are available from SVF Flow Controls,
Inc. Table B below shows what the kits consist
of. When ordering a Repair Kit, please be sure
to specify the type, size and seating material
of the valve.
When repairing a valve use only SVF Flow
Controls, Inc. authorized spare parts including;
bolts and nuts, etc. In addition to maintenance
kits, spare parts are available from SVF Flow
Controls, Inc. They are: balls and stem. If
additional parts are required (body and ends)
it is normally recommended that the complete
valve be replaced.
Components from a different valve series should
not be used with the repair of any other valve.
If the valve is altered in any way, no liability can
be accepted by SVF Flow Controls, Inc.
4
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES VB41 BALL VALVES
TORQUE SPECS
Certain precautions need to be followed when
tightening bolts down to their corresponding
torques to help prevent bolt galling.
There are two passes each bolt has to undergo
during the process, first pass and the final
pass. Once every bolt has met the first pass
requirement, the final pass can be initiated.
When tightening down bolts it is necessary to
follow the corresponding bolt pattern shown
below.
1 3
4 2
1 3
4 2
6 5
1 7
8 2
4 5
6 3
1 7
8 2
4 10
9 3
6 5
1084 6
VB41 BOLT PATTERNS - BOLT TIGHTENING SEQUENCE
TABLE B: GENERAL REPAIR KIT
Part Quantity
Thrust Washer 1
Stem Seals 3
Belleville Washers 2
Seats 2
Body Seal 1
O-Ring 1
Body Bolts
(Carbon Steel or Stainless Steel)
Valve
Size
Bolt
Pattern
First
Pass
Final
Pass
Stem
Nuts
2” 4 240 400 140 ~ 160
3” 6 348 580 180 ~ 200
4” 8 348 580 250 ~ 270
6” 10 480 800 300 ~ 350

Series VB41 Control Ball Valve
www.SVF.net
IOM-VB41
MATERIALS OF CONSTRUCTION FOR SVF SERIES VB41 BALL VALVES
5
Item # Part Name Materials Recommended Spare Wetted
1 Body A351-CF8M A216-WCB - X
2 End Cap A351-CF8M A216-WCB - X
3 Ball A351-CF8M - X
4 Stem A193-B8 - X
5 Seat TFM1600™ SupraLon™ X X
6 Body Seal 316 + GRAFOIL®PTFE X X
7 Stem Seal GRAFOIL®PTFE X -
8 Bushing SUS304 X -
9 Gland SUS316 - -
10 Belleville Washer SUS301 X -
11 Stem Nut A194-8 - -
12 Tab Lock SUS304 - -
13 Handle Gland SUS304 - -
14 Handle (2”) SUS304 - -
15 Handle Nut A194-8 - -
16 Body Bolt A193-B8 - -
17 Body Nut A194-8 - -
18 Locking Device (2”) SUS304 - -
19 O-Ring Viton®X -
20 Thrust Washer SupraLon™ X X
21 Anti-Static Device SUS316 - -
22 Triangular Stopper (3”~6”) SUS304 - -
23 Stop Bolt A193-B8 - -
24 Stop Washer A194-8 - -
25 Pipe Handle Adapter (3”~6”) A351-CF8 - -
26 Adapter Set Screw (3”~6”) A193-B8 - -
27 Pipe Handle (3”~6”) SUS304 - -
28 Pipe Handle Set Screw (3”~6”) A193-B8 - -
NOTE: After valve assembly is completed, install the proper valve
handle parallel to the groove on the top of the stem as shown.
For 3”~6” Valves:
For 2” Valves:
VALVE HANDLE INSTALLATION
Slide the Pipe Handle
(#20) over the top of
the Stem (#4) and
Tighten Pipe Handle
Set Screw (#23)
Slide the Pipe Handle (#20)
through the Pipe Handle Adapter
(#21) and tighten the Adapter
Set Screw (#22)
27
28
26
25
15
14
4
4
Slide the Handle (#19) over the
top of the Stem (#4) and tighten
the Handle Nut (#18)
Groove on
top of Stem
(3”~8”) (1/2”~2-1/2”)
28
NOTE: The Belleville
washers (#10) are to
be installed in alternating directions. The
bottom Belleville washer is concave up
while the top Belleville is concave down.
(3”~6”) (2”)
V-Port Ball (30º & 60º V-Slot)
Ball’s “V” Port is in the downstream
direction, when open, as indicated by
the directional arrow on the valve body
9