Owner manual

Installation and Maintenance Manual
Series 19 - Segmented Ball Valves
Date: Feb 2013 / Page 6 of 19
Installation and Maintenance Manual
Series 19 - Segmented Ball Valves
Date: Feb 2013 / Page 7 of 19
® ®
A Subsidiary of BRAY INTERNATIONAL, Inc. A Subsidiary of BRAY INTERNATIONAL, Inc.
FLOW-TEK, Inc. Tel: [phone]
© 2012 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: [phone]
Houston, Texas 77041 www.flow-tek.com
FLOW-TEK, Inc. Tel: [phone]
© 2012 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: [phone]
Houston, Texas 77041 www.flow-tek.com
6. PREVENTATIVE MAINTENANCE
UÊAt least once every six months, check for proper
operation by following the preventative maintenance
steps outlined below. These steps may be performed
while the valve is in line and without interrupting service.
If an internal problem is suspected, refer to section “9”
for class 150/300 and “11” for class 600.
UÊLook for signs of gasket leakage through the end flanges
and post. If necessary, re-torque end flanges and post
cover.
UÊExamine the valve for damage caused by corrosive
fumes or process drippings.
UÊClean the valve and repaint areas of severe oxidation.
UÊCheck the packing-box for proper tightness. If there is
a persistent leak, change the packing after referring to
sections “9.3” class 150/300 and “11.2” class 600
for dismantling the valve, “9.5” class 150/300 and
“11.3” class 600 for Reassembling the valve.
CAUTION: Do not over tighten packing. This can cause
excessive packing wear and high friction that may
impede stem movement.
UÊIf the valve is equipped with a lubricator, add lubricant
if necessary.
UÊIf possible, stroke the valve and check for smooth, full
stroke operation. Unsteady stem movement may indicate
an internal valve problem.
UÊCheck the calibration of the positioner/controller if
available. For further preventative maintenance, see the
instructions in the installation, operation and maintenance
manual for the applicable positioner/controller.
UÊEnsure all accessories, brackets and bolting are securely
fastened.
UÊIf possible, remove power source (air supply/electrical
signal) and observe actuator for correct fail-safe action.
UÊCheck the actuator and all air connections for leaks.
UÊIf an air filter is supplied, check and replace the cartridge
if necessary.Table 1: Flange Bolting Specifications
Size
(in)
ANSI
CLASS
RATINGS
Bolt Length
(mm)
(2)
Torque (N-m)
(1)
Low
Strength
Intermediate
Strength
1
150 65 31 82
300 75 63 165
600 90 / 80
(3)
63 165
1½
150 70 31 82
300 90 110 295
600 110 / 90
(3)
110 295
2
150 85 63 165
300 90 63 165
600 110 / 95
(3)
63 165
3
150 90 63 165
300 110 110 295
600 125 / 110
(3)
110 295
4
150 90 63 165
300 115 110 295
600 145 / 125
(3)
179 478
6
150 100 110 295
300 120 110 295
600 170 / 150
(3)
270 720
8
150 110 110 295
300 140 179 478
10
150 115 179 478
300 160 270 720
12
150 120 179 478
300 170 401 1069
(1) Torque values are recommended for low and intermediate strength
bolting per ANSI B16.5 ¶5.3.2. Higher torques may be used with high
strength bolting (ANSI B16.5 ¶5.3.1). In all cases the user must verify the
selected bolting‘s ability to seat the joint under expected operating condition.
Long thru-bolted joints generally require higher strength bolting and torque
values than shorter flanged bolting depending on operating conditions.
(2) Lengths are based on ANSI B16.5 stud bolts and raised face ends.
(3) Lengths are for the shorter studs used in treaded holes. Refer General
Assembly drawing for the quantities.
7. REMOVING VALVE FROM LINE
1. If an internal problem is suspected with the valve and
disassembly is required, remove the valve from the line
by proceeding as follows.
WARNING: Depressurize line to atmospheric pressure,
drain all process fluids and decontaminate the valve (if
caustic or hazardous materials are present). Failure to
do so can cause serious injury. Make sure the valve is in
closed condition.
2. Attach a hoist or some means to support the valve.
3. Remove line bolting. Do not attempt to pry line flanges
apart by pushing or pulling on the valve or actuator.
4. Slide the valve carefully from the line. To avoid damage
to the gasket surfaces, do not twist the valve.
5. After the valve is completely removed from the line,
slowly relieve air pressure from the actuator.
8. ACTUATOR
The valve closed and open position are indicated by the
position of double “D” on the stem. Refer below figure.
If possible, install the valve so that the actuator can be
disconnected without removing the valve from the piping.
The actuator must not touch the pipe line, because pipeline
vibration may damage it or interfere with its operation.
In some cases, for instance when a large-size actuator is
used or when the pipe line vibrates heavily, supporting the
actuator is recommended.
Figure 1
CLOSED CLOSED
OPEN OPEN