Emerson VANESSA 30,000 Series - 2.3 Valve verification; 2.4 Commissioning

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VANESSA SERIES 30,000 TRIPLE OFFSET VALVE (TOV)
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
2.3 Valve verification
1. Tighten the packing box enough to prevent
shaft leakage. Over-tightening will decrease
packing component life and increase
operating torque.
2. Check the operability of the valve by stroking
it to “full open” and “full close”. To verify the
valve orientation, the disc position indicator
mark on the shaft (during the normal open
to close cycle) should rotate clockwise from
a position in line with the pipe (see figure3A)
to a position parallel to the pipe flanges
(seefigure 3B).
2.4 Commissioning
1. Whenever the piping system is pressurized
with water for testing or in case it has been
shut down after testing for a long time,
the following recommendations should
be adopted:
a. Use corrosion inhibitor with water to
pressurize the piping system.
b. After testing, the piping system should
be depressurized and the test water
completely drained.
c.
After testing, the valve must be operated
through a complete opening/closing cycle
and the disc should be left in half-open
position. Apply a film of protective oil in
the packing area by means of a paintbrush.
The protective oil must fill the area between
shaft and packing bushing.
FIGURE 3A
FIGURE 3B
Clockwise to close
Clockwise to close
Shaft key
Disc in open position
Disc in closed position
Disc position
indicator mark
Disc - shaft key and position indicator mark plane
Disc - shaft key and position indicator mark plane
Disc position indicator mark
Shaft key
2. The valve is fully metallic and typically
withstands the cleaning agents used for
metallic pipelines.