User instructions - Shearstream HP - VLENIM0027-01 03.08
4
*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.
**Lengths are based on ANSI B16.5 stud bolts and raised face ends.
Table I: Flange Bolting Specifications
Valve
Size
(inches)
ANSI
Class
Rating
Bolt**
Length
(inches)
Torque* (ft.-lbs.)
Low
Strength
Intermediate
Strength
1
150 2.5 23 61
300 3.0 46 122
600 3.5 46 122
1½
150 2.75 23 61
300 3.5 82 218
600 4.25 82 218
2
150 3.25
46 122
300 3.5 46 122
600 4.25 46 122
3
150
3.5 46 122
300 4.25 82 218
600 5.0 82 218
4
150
3.5 46 122
300 4.5 82 218
600 5.75 132 353
6
150
4.0 82 218
300 4.75 82 218
600 6.75 199 531
8
150 4.25 82 218
300 5.5 132 353
600 7.5 296 789
10
150
4.5 132 353
300 6.25 199 531
600 8.5 420 1119
12
150
4.75 132 353
300 6.75 296 789
600 8.75 420 1119
16
150
5.50 199 531
300 7.75 420 1119
600 10.00 667 1760
5.1 Look for signs of gasket leakage through the end flanges
and post. If necessary, re-torque end flanges and post.
5.2 Examine the valve for damage caused by corrosive fumes
or process drippings.
5.3 Clean the valve and repaint areas of severe oxidation.
5.4 Check the packing-box for proper tightness. If there is a
persistent leak, change the packing after referring to sec-
tions “Valve Disassembly and Body Reassembly”.
CAUTION: Do not overtighten packing. This can cause ex-
cessive packing wear and high friction that may impede
shaft movement.
5.5 If the valve is equipped with a lubricator, add lubricant if
necessary.
5.6 If possible, stroke the valve and check for smooth, full-
stroke operation. Unsteady shaft movement may indicate
an internal valve problem.
5.7 Check the calibration of the positioner. For further prevent
-
ative maintenance, see the instructions in the installation,
operation and maintenance manual for the applicable posi-
tioner.
5.8 Ensure all accessories, brackets and bolting are securely
fastened.
5.9 If possible, remove air supply and observe actuator for cor
-
rect fail-safe action.
5.10 Check the actuator and all air connections for leaks.
5.11 If an air filter is supplied, check and replace the cartridge if
necessary.
(4 strony)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Komentarze do niniejszej Instrukcji