Leslie Controls D Series - Manual (Page 3)

CFTIIP-015
Rev.0
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Page 3 of 15
4 Installations
1. Before installing the valve, clean the line of dirt,
welding chips, scale or other foreign material.
2. Whenever possible, the valve should be installed
in an upright position. Vertical installation permits
easier valve maintenance.
3. Be sure to provide proper overhead clearance for
the actuator to allow for disassembly of the plug
from the valve body
4. Double-check flow direction to be sure the
valve is installed correctly. Flow direction is
indicated by the arrow attached to the body.
5. If welding the valve into the line, use extreme
care to avoid excess heat buildup in the valve.
6. Connect the air supply and instrument signal
lines. Throttling control valves are equipped with a
valve positioner. Refer to the appropriate positioner
bulletin for connections, maximum air supplies, and
maintenance instructions.
4.1 Quick-check
Prior to start-up, check the control valve by
following these steps:
1. Stroke the valve and observe the plug position
indicator on the stem clamp compared to the stroke
indicator plate. The plug should change position in
a smooth, linear fashion.
NOTE: Due to excessive friction, graphite packing
can cause the plug stem to move in a jerky fashion.
2. Check for full stroke by making appropriate
instrument signal change.
3. Check all air connections for leaks.
4. Check packing box bolting for the correct
adjustment.
CAUTION: Do not over tighten
packing. This can cause excessive packing
wear and high stem friction that may impede
plug movement.
5. Make sure the valve fails in the correct
direction in case of air failure. This is done
by turning off the air supply and observing
the failure direction.
6. After a temperature excursion has
occurred, bonnet flange bolting should be re-
torqued to ensure bonnet gaskets do not leak.
(Refer table 1)
Table 1
SIZE
OF THE
VALVE
CLASS
SIZE
OF
THE
NUT
(in)
NO.
OF
NUTS
TORQUE
Nm
2"
150 ~ 600 0.75 6 152
900 ~ 1500 0.875 8 220
3"
150 ~ 600 0.875 8 233
900 ~ 1500 1.25 8 583
4"
150 ~ 600 0.875 8 307
900 ~ 1500 1.5 8 922
6"
150 ~ 600 1 12 391
900 1.25 12 856
1500 1.75 8 1798
8"
150 ~ 600 1 12 573
900 1.75 8 2631
1500 1.625 12 1629
10"
150 1 8 879
300 1 12 586
600 1.25 16 550
12"
150 1 12 873
300 1.25 12 1091
600 1.5 16 982
16"
150 1.25 12 1605
300 1.5 12 1926
600 1.75 16 1685