SVF BZ9 Series Owner's manual

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BZ9 Series Ball Valves
IOM-BZ9
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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 BZ9
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.
INSTALLATION
The valve may be installed for flow or vacuum in
either direction. Carefully exclude pipe sealants
from the valve cavity. When installing, use standard
gaskets suitable for the specific service. Tighten end
connection bolts evenly.
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
position during 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.
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES BZ9 BALL VALVES

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BZ9 Series Ball Valves
IOM-BZ9
WELDING ENDS
Welding of valves shall be performed by a qualified
person according to the ASME Boiler Construction code
Section IX. Sweat End valves must be partially disassem-
bled to prevent heat damage during welding of the soft
plastic seats and seals in the valve. Prior to disassembly,
the valve may be temporarily fitted in line, and the ends
tack-welded to the piping for alignment purposes.
1. With the valve in the OPEN position, remove Body
Bolts (#9) and Body Bolt Nuts (#10).
2. Separate the End Connections (#2) from the Body
(#1) and carefully remove the Seats (#5), Body
Seals (#13) and Ball (#3) to avoid damaging them.
3. With the soft components and Ball (#3) removed
from the Body (#1), loosely reassemble the End
Connections (#2) to the valve Body (#1).
4. Tack weld the End connections (#2) to the pipeline,
then remove the valve Body (#1).
5. Complete the welding, being careful to avoid weld
splatter on the exposed end faces.
6. When cooled, clean faces of the ends before reas-
sembling the valve. (See Reassembly Procedure)
OPERATION
SVF valves provide tight shut off when used under normal
conditions and in accordance with SVF’s published
pressure/temperature chart. If these valves are used
in a partially open (throttled) position seat life may be
reduced.
SVF valves have ¼ turn operation closing in a clockwise
direction. It is possible to see when the valve is open
or closed by the position of the wrench handle. When
the wrench is in line with the pipeline, the valve is open.
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the flow path.
Any media which might solidify, crystallize or polymerize
should not be allowed to stand in the ball valve cavities
unless regular maintenance is provided.
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,
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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.
STEM LEAKAGE
Examine the Gland/Seal adjustment for damage (see
image below). If in good condition tighten the Gland
to the torque values provided in Table A. Due to wear
and tear the Gland can become loose and will need
to be re-torqued. Further maintenance necessitates
dismantling of the valve.
The stem nut can be tightened to compress the stem
packing without removing any actuation devices. Using
the proper Gland Wrench tighten the Gland (clockwise
motion) until leakage completely stops.
LEAKAGE AT BODY JOINT
Check for tightness at the body connector bolts. If loose,
tighten body bolts. Excessive force will damage the bolts
(See Table A and Bolt Tightening Sequence). If there is
still leakage it will be necessary to dismantle the valve
and replace the body seals.
2
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES BZ9 BALL VALVES
Gland/Seal
Adjustment

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BZ9 Series Ball Valves
IOM-BZ9
IN-LINE LEAKAGE
Check that the 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: If Stem leakage and leakage at body joint are
not cured by the simple means described above, it will
be necessary to dismantle the valve. If there is no stem
leakage the stem assembly should not be touched.
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 seals
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, face
shields, gloves, etc., MUST BE USED for this operation.
A DISASSEMBLY OF VALVE (Removed from line)
1.) Remove the End Connectors (#2) by
removing the Body Bolts (#9) and Body Bolt
Nuts (#10).
2.) Once the End Connectors (#2) have been
separated from the Body (#1), remove the
Seats (#5) and Body Seals (#13).
3.) Make sure the Ball (#3) is in the closed
position, thus the Ball (#3) can be taken out
easily from the Body (#1).
B REMOVING STEM ASSEMBLY
1.) Remove Handle (#8) by removing Handle
Nut (#15).
2.) Remove the Washer (#17), Gland (#7), &
Stem Seal (#6).
3.) Push the Stem (#4) down into the body
cavity to remove. Once removed take off the
O-Rings (#11) and Thrust Washer (#12).
C INSPECTION
1.) The ball and the surfaces against which the
seats wipe and make contact 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 and body surfaces, which the thrust
washer and Stem Seals make contact with,
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), Stem (#4),
Thrust Washer (#12), and O-Rings (#11).
2.) For stem reassembly, disassembly procedure
should be followed in reverse order.
3.) When stem assembly is complete, tighten
Stem Nut according to the values in Table A.
4.) With the Stem (#4) in the close position, insert
the Ball (#3) into Body (#1) so that stem slot
engages with the tang at the base of the Stem
(#4).
5.) Insert Seats (#5) and Body Seals (#13) into
the Body (#1).
6.) Merge the End Connectors (#2) with the
Body (#1).
7.) Insert and tighten Body Bolts (#9), and Body
Nuts (#10), in accordance to the cross
pattern procedure shown in Diagram A.
8.) In the final assembly step ensure that the Body
Bolts (#9) and Body Bolt Nuts (#10) are
tightened according to the torque values on
Table A and Bolt Tightening sequence as noted
in Diagram A.
3
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES BZ9 BALL VALVES

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BZ9 Series Ball Valves
IOM-BZ9
TABLE A: TORQUE REQUIREMENTS (in-lbs)
Series BZ9
Valve Size
1/2”
3/4”
1”
1-1/2”
2”
4
4
4
4
4
48
53
95
106
106
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, stems and glands. 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.
TABLE B: GENERAL REPAIR KIT
Part
Thrust Washer
Stem Seal
Seats
Body Seals
O-Rings
Quantity
1
1
2
2
2
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 bolts it is
necessary to follow the corresponding bolt pattern
shown in Diagram A.
Body Bolts
80
89
159
177
177
First
Pass
Final
Pass
Bolt
Pattern
1 3
4 2
4
DIAGRAM A
INSTALLATION, OPERATION & MAINTENANCE FOR SVF SERIES BZ9 BALL VALVES
Stem Nuts
56
56
83
135
135
BZ9 SERIES BOLT PATTERN
BOLT TIGHTENING SEQUENCE
BZ9 REPAIR KIT PART NUMBERS
Valve Size
1/2”
3/4”
1”
1-1/2”
2”
Part Number
RKBZ905TT
RKBZ907TT
RKBZ910TT
RKBZ915TT
RKBZ920TT

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BZ9 Series Ball Valves
IOM-BZ9
MATERIALS OF CONSTRUCTION FOR SVF SERIES BZ9 BALL VALVES
Item #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Wetted
X
X
X
X
X
-
-
-
-
-
X
X
X
-
-
-
-
-
Materials
Bronze C84400
Bronze C84400
316 Stainless Steel
316 Stainless Steel
PTFE
PTFE
Brass
304 Stainless Steel
304 Stainless Steel
316 Stainless Steel
NBR
PTFE
PTFE
PVC
Brass
Brass
304 Stainless Steel
Steel
Recommended Spare
-
-
-
-
X
X
-
-
-
-
X
X
X
-
-
-
-
-
5
Part Name
Body
End Connector
Ball
Stem
Seat
Stem Seal
Gland
Handle with Locking Device
Body Bolt
Body Bolt Nut
O-Ring
Thrust Washer
Body Seal
Handle Cover
Handle Nut
Lock Pin
Washer
Nut
SVF