WDM GE Series, Руководство по эксплуатации

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GS Pumps.
7
The following precautions should be noted when installing suction
piping:
•
Suction piping should be as direct as possible, and ideally
the length should be at least ten times the pipe diameter.
•
Short suction piping can be the same diameter as the
suction opening.
•
Depending on the length of a longer pipe, the diameter should
be one or two sizes larger
than the pump suction. Reduce the
diameter of the pipe to match the diameter of the pump
suction as it reaches pump suction opening.
•
When required to reduce the pipe diameter, use an eccentric
reducer with the eccentric side down.
•
The pipe should never be smaller in diameter than the pump
suction opening.
•
For best results all horizontal suction lines should follow an
even gradient. In suction lift conditions the gradient should be
a gradual slope upward. For positive suction head, the
gradient should be a gradual downward slope.
•
In order to avoid air pockets that can throttle the system or
cause erratic pumping, high points, such a pipe loops, should
be avoided.