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VANESSA SERIES 30,000 TRIPLE OFFSET VALVE (TOV)
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
3.3 TROUBLESHOOTING GUIDE
Symptom Possible cause Resolution
Valve does not rotate 1. Packing is too tight 1. Loosen gland nuts
2. Actuator has failed 2. Replace or repair
3. Valve packed with debris 3. Flush or clean valve to remove debris
4. Shaft key has sheared 4. Determine cause of shearing and correctly replace shaft key
5. Fluid solidification between bearings and shaft 5. Flush bearings by flushing holes (if present)
Shaft packing leaking 1. Packing gland flange nuts too loose 1. Tighten packing gland flange nuts
2. Packing box damaged 2. Replace packing box - see Paragraph 4.1
Bottom flange gasket leaking 1. Bottom flange bolting loose 1. Tighten bottom flange bolting
2. Spiral wound gasket damage 2. Replace gasket - see Paragraph 4.3
Valve leaking 1. Valve not fully closed 1. Close valve
2. Debris trapped in valve 2. Cycle and flush (with valve open) to remove debris
3. Actuator mechanical stops improperly set 3. Remove the stop for closure and reset properly
4. Seal ring damaged 4. Replace seal ring - see Paragraph 4.2
Jerky operation 1. Packing box is too tight 1. Loosen packing gland nuts, cycle valve, retighten
2. Air supply inadequate 2. Increase air supply pressure and/or volume
3. Actuator/shaft adapter misaligned 3. Remove actuator mounting and realign
SECTION 3 - USE
3.1 Valve use
Vanessa Series 30,000 valves do not feature
cavities where the process fluid may be trapped
and isolated from the main line. Therefore,
any overpressure is not possible as long as
the system to which the valve is connected to
remains protected against overpressure by a
suitable device.
Vanessa Series 30,000 does not generate hot
/ cold surfaces through their own operating
function. Hot or cold surfaces of the valve are
generated by the process temperature of the
system, where the valve is installed. Hence
their protection shall follow the requirements
of the system itself. The valve bracket does not
need to be protected.
The valve body is more resistant than the
pipe to which it is connected, being of simple
cylindrical-shape with outward cylindrical
branches and thickness much higher than the
pipe itself. Therefore, the valve body cannot
be taken as a limiting factor for the maximum
allowable loads transmitted by the pipe.
3.2 Operating Procedures
A Vanessa Series 30,000 needs either an
actuator or manual gear operator to be
operated.
Follow the applicable instructions provided by
the actuator or gear manufacturer.
The valve closes by turning the shaft clockwise
when observed from the bracket top end.
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