Suction Lift - Pentair Berkeley Manual Del Usuario

Installation • Suction Connection

Suction Lift

Pump driven by remote power
source, direct coupling or
pulley/belt connection.
See foundation
section.
• Use pipe, tubing, or reinforced hose to make suction
connection. Hose must have sufficient strength to
resist collapse under the pressure differential that
occurs while pump is running.
• Suction pipe size should be at least one commercial
pipe size larger than opening of pump inlet. Flow
velocity should not exceed 8 ft./sec.
• Suction screen must screen out solids that could clog
pump impeller.
• Suction screen area must be at least four times
suction pipe area.
• Net Positive Suction Head Available (NPSHA)
must exceed Net Positive Suction Head Required
(NPSHR) by the pump or reduced performance and
severe pump damage may result.
• All suction piping must have continuous rise to the
pump suction inlet. A 1/4 inch per foot minimum
slope is recommended.
Short length of straight pipe after reducer.
( 2 times pipe diameter minimum )
Eccentric Reducer
flat side up.
Support pipe
as re uired
T E All connections
must be air tight.
Recommended
Suction
Gauge
Straight run, short as possible but
at least 6 times pipe diameter ("D")
after elbow to stabilize flow.
Pipe diameter ("D")
1 x "D" minimum
from bottom
Standard or long
radius elbow.
Slope upward
to pump.
As close
as possible
4 x "D"
minimum
Strainer / Foot Valve
To keep debris from entering
pump suction and to maintain
pump prime after shut-off.
6 2
8
6