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Conveying System Mechanical Components Chapter 3: Installation 49 of 138
• You can attach a quick-change or standard tube coupler to vinyl flex hose by inserting
a stub of hard tube into the hose and securing it with a hose clamp. Be sure enough
tube extends from the hose to properly install the quick-change or coupler. Make sure
that you put clear silicone caulk around adjoining tube seams for exterior bolted
couplers.
• If you use stainless flexible material hose, the material flow must be in the direction as
indicated by the arrows on the hose. Material direction is not critical with vinyl flex
hose.
• Bring all truck fill lines to a central location, such as a silo, unless otherwise specified.
• All rail car manifold Y-tubes must be installed with a ten-degree (10º) downward slant
from horizontal on the leg section. Make sure that space between rail car manifold
Y-tubes are fifteen feet (15’/4.5 meters) on center to allow proper alignment between
rail car discharge ports and the manifold Y-tubes.
• A plug must be put in the last sequence T valve on the vacuum header to prevent
vacuum loss. If atmospheric valves are used, you must terminate the vacuum line at the
last atmospheric valve.
Multiple Line System Piping Considerations
• Multiple line systems have separate material lines for each material to allow different
types of materials to be conveyed.
• Multiple line systems have separate pickup devices for each vacuum hopper.
• Materials are often loaded from beside the processing machine from gaylords, grinder
takeoffs, and storage bin takeoffs.
Figure 22: Typical Multiple Line System Installation