PerkinElmer PINAACLE 900 Series, Руководство по оборудованию и обслуживанию для клиентов

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Preparing Your Laboratory
Table 2-2. U.S. Suppliers of Flexible Metal Duct Tubing.
For the names of suppliers in other areas, contact your PerkinElmer representative.
The capacity of the blower depends on the duct length and the number of elbows
or bends used to install the system. If an excessively long duct system or a system
with many bends is used, a stronger blower may be necessary to provide sufficient
exhaust volume. Alternatively, smooth stainless steel tubing may be used instead
of flexible stainless steel tubing where flexibility is not required to reduce system
friction loss or "drag." A length of smooth stainless steel ducting has 20-30% less
friction loss than a comparable length of flexible ducting. When smooth stainless
steel tubing is used, elbows must be used to turn corners. These elbows should turn
at a center line radius of 45 degrees to reduce friction losses, and the number of
elbows should be minimized.
If a rigid tubing system is used, it is strongly recommended that flexible tubing be
used from the vent hood to the ceiling to facilitate hood alignment and service
access to the instrument.
When installing a venting system, all connections should be made with metal
screws or rivets. Solder must not be used. The blower should be located at least 4
meters (12 feet) and not more than 6.5 meters (20 feet) from the flame or the
graphite furnace and should exhaust to the atmosphere or into a considerably wider
exhaust duct. Under these conditions, the following temperatures have been
measured during operation of a nitrous oxide-acetylene flame: 310 °C at the vent
intake; 160 °C at 2.4 meters (8 feet) from the vent intake; 105 °C at the blower
intake; and 50 °C at the blower motor housing near the front bearing. Instructions
Flexaust Co.
11 Chestnut St.
Amesbury, Ma 01913
(508) 388-9700
Potomac Rubber Co.
9011 Hampton Overlook
Capital Heights, MD 20743
(301) 336-7400
Triplex Inc.
1142 Kress St.
Houston, TX 77020
(713) 672-7521
Fox Manufacturing Inc.
P.O. Box 1047
Clarkdale, AZ 86324
(602) 634-5897