T E C H L I N E A S ™ D E S I G N G U I D E
NETAFIM @[email protected]
21/12/2009
19
PRV SELECTION GUIDE
:
Size:
20mm Low Flow 20mm High Flow
40mm Unit
Min. Flow
: 50L/H 800L/H 1,600L/H
Max. Flow
: 1,000L/H 5,000L/H 10,000L/H
Pressure Reduction Range: 11m, 14m, 18m, 20m,
25m
& 30m
PRESSURE & FLOW CHECKS:
One of the best means of ensuring a Techline AS™ zone is operating properly is to test
the pressure at regular intervals.
By taking and recording the pressure while the zone is running, you can ensure that the
zone is working as installed.
Take the reading as far away from the source as possible to ensure that pressures
throughout the rest of the zone are at least that high.
If readings are lower than normal, a line break, clogged filter, dirty remote control valve,
clogged PRV, or reduced line pressure are possible causes.
NOTE:
Always take the readings at the same time of day, from the same spot. This reduces the
chance of faulty readings due to other factors.
If a water meter is available, check the flow of each zone.
Record the information at least once per year on a “System Inspection Checklist”
(an
example is provided on page 35).
LINE INDICATOR FLAG:
A Line Indicator Flag is an ideal visual gauge to let you know when your Techline AS™
is operating especially when the dripperline is covered with mulch or installed sub-
surface in turf.
Line Indicator Flag is connected to your Techline AS™ zone to indicate when the
system is pressurized.
As pressure builds up in the zone the Indicator Flag raises. As pressure drops within the
dripperline the flag will drop.
