© SVF Flow Controls, Inc. • 13560 Larwin Circle • Santa Fe Springs, CA 90670 • Tel: 1.800.783.7836 • FAX: 562.802.3114
[email protected] • [email protected] • Visit our website: www.SVF.net • Specifications subject to change without notice
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Please visit www.SVF.net for the latest updates on this document. All data posted on our website supersedes all prior publications • [Document # SVF_FS7_IOM • 10/21/2013]
INSTALLATION, OPERATION & MAINTENANCE FOR SVF
SERIES FS7 BALL VALVES
FS7 Series Ball Valves
I N C O R P O R A T E D
SV
F
Flow Controls
IOM-FS7
REBUILDING
Before rebuilding, check that all the correct components
are available and that they are fit for reassembly. When
rebuilding, cleanliness is essential to allow long valve life
and provide cost effective maintenance.
PRECAUTIONARY RECOMMENDATIONS:
• No Body or Stem Seals are Reusable and Must Be
Replaced!!
• Care must be taken to avoid scratching the seats
and seals during installation.
• Do not use high speed impact wrenches when
assembling or disassembling fasteners.
• All fasteners (body bolts, nut, stems, etc) must be
inspected prior installation making sure all the
threaded areas are clean of any debris.
• It is recommended to use an anti-seize lubricant on
bolt threading.
• Failure to follow these recommendations may cause
damage to the components and/or cause galling of
the fasteners.
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.) Turn the valve to the OPEN position.
2.) Loosen the body bolts (#16) diagonally in accordance
with the cross pattern procedure shown on page # 4.
3.) After loosening all Body Bolts (#16), they can be
removed along with the End Connectors (#2).
4.) Remove the Seats (#5), Body Seals (#6), and Retainer
(#17).
5.) Make sure the Ball is in the closed position, thus the Ball
(#3) can be removed easily from the Body (#1).
B. REMOVING STEM ASSEMBLY
1.) Remove the Pipe Handle (#15) by removing the Pipe
Handle Bolt (#14).
2.) Remove the Pipe Handle Adapter (#13), and Tab-Lock
(#12).
3.) Remove the Stem Nut (#11) by holding the stem (#4)
firmly.
4.) Remove the Belleville Washers (#9), Stop Plate (#10),
Gland (#8), and Stem Seals (#7).
5.) Carefully push the Stem (#4) down into the body cavity
to remove. Once removed, take off the Thrust Washer
(#18).
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 and body surfaces, which the thrust washer
and Stem Seals make contact with, should be free of
pit marks and scratches.
D REASSEMBLY OF STEM
1.) Apply an adequate amount of lubricant compatible
with the media being handled around Stem (#4),
and Thrust Washer (#18).
2.) Place the NEW Thrust Washer (#18) on the Stem (#4)
and push the Stem up through the body cavity and
into the stem housing.
3.) After the Stem has been inserted through the cavity,
hold the bottom of the stem to prevent it from slipping out.
4.) Install the NEW Stem Seals (#7), Gland (#8), Stop Pins
(#19), Stop Plate (#10), Belleville Washers (#9) and
Stem Nut (#11).
5.) When the stem assembly is complete, firmly secure the
Stem (# 4) and tighten the Stem Nut (#11) according
to the values shown in Table A, Page 4.
E REASSEMBLY OF VALVE
1.) Apply an adequate amount of lubricant compatible
with the media being handled around the Ball (#3),
Seats (#5), and Body Seals (#6).
2.) Turn the Stem (#4) to the CLOSED position (“V” pointer of
stop plate to be perpendicular to the open cavity of
body) in order to insert the Ball (#3) into the Body (#1)
so that the stem slot of the ball engages with the tang
at the base of the stem.
3.) Turn ball to the OPEN position.
4.) Place the Body Seals (#6) on the Body (#1) and make
sure they rest squarely on the center seal surface of the
Body (#1).
5.) Insert the Seats (#5) into the Retainers (# 17) and place
them into the Body (#1). Note: Make sure each Seat/
Retainer set rests firmly on back surface of each Body
(#1) recess.
6.) Merge the End Connectors (#2) with the Body (#1).
7.) Insert and finger tighten the Body Bolts (#16) before
applying the torque wrench.
8.) Tighten the Body Bolts (#16) diagonally, in accordance
to the cross pattern procedure shown on page # 4.
9.) In the final assembly step ensure that the Body Bolts (#16)
are tightened to torque values according to Table A,
Page 4.
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