Nor-Cal Intellisys Throttling Butterfly Valve - Manual (Page 8)

8 8 Visit our Web Site www.n-c.com
TBV-OP-LIT 01/04
I
NTELLISYS
T
HROTTLING
B
UTTERFLY
V
ALVES
9 Call toll free 800-824-4166 or 530-842-4457 • FAX 530-842-9130
TBV-OP-LIT 01/04
I
NTELLISYS
T
HROTTLING
B
UTTERFLY
V
ALVES
Unpacking: Inspect the shipping box before unpacking. Any damage should
be reported to Nor-Cal Products or directly to the transportation carrier.
Carefully remove the product from the box and visually inspect it for damage.
NOTE: Do not discard the packing materials until the
product has been inspected to your satisfaction.
If return of the product to Nor-Cal Products should become necessary, please
contact Intellisys Customer Service to obtain a Return Materials Authorization
(RMA) Number.
Pre-Installation Functionality Check: Nor-Cal Products carefully ensures
that every product shipped is in perfect working condition. However, it is still
a good idea to quickly check the functionality of the unit prior to installation
into the vacuum system. To do so, connect the TBV-series valve to a Nor-Cal
Products APC-series controller (or directly to an appropriate DC power source
in case of a IQA or IQD-series valve). The valve will complete a 30-second
initialization sequence during which the valve plate will cycle back-and-forth
a few times. The valve will eventually stop in the open position.
WARNING: The valve plate movement presents a pinching
hazard. Please keep fingers, hands or other objects away from
the valve opening and associated moving parts.
Further verification of the system can be done by toggling the “OPEN /
CLOSE” switch on the controller front/top panel. If the valve does not
operate as described please contact Nor-Cal technical support.
Valve Installation: Install the TBV-series valve in your vacuum system
using the appropriate hardware and cables. To allow for proper ventilation
and access, make sure that at least 3 inches of unobstructed space is available
adjacent to all perforated sides when installing a IQA or IQD-series valve, and
that at least 3.5 inches of space is reserved above the top of the valve to allow
for cable connector hoods. A complete list of installation hardware and
cables assemblies available from Nor-Cal Products can be found in
Appendices I and II.
NOTE: Specific installation instructions should be provided with
each custom UVD-drive. Required UVD fasteners and procedures
are not covered in this Manual.
NOTE: Refer to the appropriate section of the Adaptive
Pressure Controller Operating Manual for more details
about cable connections and pin-outs.
Once the valve is installed in the system, the approximate valve plate position
can be determined in one of two ways:
• Some models of TBV products have a circular cut-out in the motor
housing top. The rear shaft of the motor is slotted in a direction parallel
with the throttle plate (± 2º), and is visible through the cut-out.
• Other models of TBV product and all UVD products include a
rotary arm visible between the motor housing and the actual valve.
The arm is always parallel with the throttle plate (± 2º).
NOTE: The rotary arm in the TBV and UVD models that contain
it serves another important function. It is used to determine
the OPEN and CLOSED valve positions during valve initialization.
DO NOT remove this arm and BE CAREFUL about making
adjustments to the setscrew that is part of the motor
mount base. Moving the position of this screw will
result in a valve position offset.
WARNING: The rotary arm found in some TBV and all UVD
models presents a pinching hazard. Please keep fingers,
hands or other objects away from it.
3.0 - Unpacking and Installation
Heating the Valves: Sometimes it is necessary to heat the TBV-series
valve to prevent process contamination from condensing on the internal
valve surfaces. Nor-Cal manufactured heater jackets are available in both
PID and Thermostatically controlled versions, custom fit for each size valve.
Please refer to Appendix III for heater jacket and related accessories
ordering information.
NOTE: Several important considerations exist pertaining
to heating of the TBV-series valves. These include:
A) The coupling used to join the motor drive to the valve is a
three-piece Oldham style assembly. The center disk of this
coupling is made from the polymeric material Acetal.
When valve operating temperatures exceed 300ºF (150ºC)
this disk needs to be replaced with one made from PEEK.
[The Acetal disk, according to the Manufacturer, has a
maximum operational temperature rating of 150ºF (65ºC).
The disk temperature approaches this limit when the
internal valve temperature is about 300ºF (150ºC).]
B) Four O-rings are used in the valve body to seal the valve
shaft penetrations. On all TBV-series valves, the default
material is Viton ® . According to the manufacturer, Viton ®
should not be used in applications where the continuous
temperature exceeds 390ºF (200ºC). If the valve temperature
is expected to remain at a higher level, either as a result of
external or internal heat sources, then perfluoroelastomer
O-rings should be used. Nor-Cal Products can provide valves
containing a number of available brand and compound
O-rings. Please refer to Appendix II or contact Nor-Cal
Products Intellisys Customer Support for more details.
C) Under certain circumstances it is possible to preferentially heat
the internal plate and shaft of the valve as compared to the
valve body. This is especially true when the valve is attached to
unheated and uninsulated foreline piping, and when process
effluents are hot. Uneven heating causes the valve plate and
shaft to expand at a faster rate than the valve body, sometimes
to the point of causing the valve plate to seize in the valve bore.
If the possibility for this phenomenon exists with your system,
please consult Nor-Cal Products Intellisys Customer Support
for options and recommendations.
Heating the Valves