ENCORE
®
700 METERING PUMP
d.
If a pulsation dampener is required to reduce pressure peaks, install
it i
n the discharge line. Refer to Dwgs. 440.400.110.010, 020, 030,
and 040
. The dampener will minimize vibrations and reduce wear
due to l
ong lines and/or high stroking speeds.
NOTE: Take care not to drip pipe primer or cement into valves. This
could damage ball checks and seats.
e.
Connect rigid pipe or tubing to the suction connection on the pump
and r
un a line without traps to the bottom of the solution container.
Install a stra
iner.
Pipe Line Diameter
To determine the proper diameter of the suction and discharge lines, take
the following into consideration:
•
Cavitation
•
Overloading (elbow, valves, tees, etc.)
To avoid cavitation for shorter runs of pipe (less than 10 feet), use pipe
with a diameter at least equal to the valve connection. To avoid cavitation
for longer runs of pipe (greater than 10 feet), use pipe with a diameter
at least one size larger than the valve connection.
The following formula can be used to compute the fluid velocity in me-
ters/second:
Velocity = {Discharge (Q) x 0.35}
d
2
where Q = feed rate in liters/hour
d = inside diameter of pipe in mm
Select an appropriate pipe diameter that keeps the velocity in the suction
line from exceeding 0.2 meters/second.
Tubing
For safety and best results when tubing is to be used, select the appropri-
ate size and material according to the pressure and temperature limits
detailed in Table 2.1.
WT.440.400.001.UA.IM.1012
17
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