396
-
3815Y1 SureFire PumpRight for Raven RCM
18
Revised 01/16/2018
Dual Metering Tube Plumbing Kits with
Dual Check Valve
For more information on metering tube:
www.surefireag.com/cms/images/Metering
SureFire dual metering tube plumbing kits are a great way to plumb a planter to apply starter fertilizer.
They
’
ll also work on other implements when applying low rates of fertilizer.
These plumbing kits will contain everything you need to distribute fertilizer from the flowmeter outlet
down to the ground application device of your choice (not included).
These instructions will show you where all the pieces go. It will provide guidance on how much
metering tube to use. There are some optional
fittings included in each plumbing kit. These
instructions will show you where and why you
’
d
want to use the optional pieces.
The dual check valve assembly is a key
piece in the dual metering tube design. In
addition to a check valve to stop fertilizer from
draining when the system is shut off,
each check
valve has an on/off valve on top of it. These
on / off valves allow the operator to turn on
only tube 1, only tube 2, or both tube 1 and 2
.
This provides for three different application
ranges, which is especially helpful when using
Black Label Zn or another product which has a
highly variable viscosity based on temperature
changes.
Dual Advantage of Dual Metering Tube
Metering tube provides a larger passage way diameter than a
comparable orifice. For a 5 GPA rate on
30”
rows, a size
0.046”
orifice would be used. For the same rate a
0.110”
meter
tube that is
8’
long would be used. This
8’
tube with more than
twice the diameter creates a fertilizer system resistant to plug-
ging while providing excellent row to row distribution.
By using two metering tubes, the fertilizer system can handle
Black Label ZN and provide the proper system pressure as the
fertilizer properties change due to temperature, mixtures and
other factors.
Standard Orifice
Metering Tube
2
-
3x
Larger
The dual metering tube allows for three application
rate ranges. Black Label ZN fertilizer has a widely
variable viscosity. Therefore, based on tempera-
ture, tank mixing and fertilizer batch, the best tube to
use will change.
SureFire recommends you start with the larger tube
ON only. This is the middle size and is a good start-
ing point. Conduct a test using the test speed
mode to determine your system pressure. If pres-
sure is below 15 psi, some check valves may not
open and row to row distribution will be uneven.
Start with larger tube ON, smaller tube OFF:
•
Pressure below 15 PSI: Turn larger tube OFF
and smaller tube ON.
•
Pressure over 50 PSI: Turn BOTH tubes ON.
Field Operation of Dual Metering Tube
-
Dual Check Valve System
Blue Tube
(smaller)
Green Tube
(larger)
GPA on
30”
rows (approx,
will vary)
Blue Tube
1.5
-
3
Green Tube
3
-
6
Blue & Green Tube
6
-
10
Minimum Recommended
flow for Blue Tube (8 ft)
4
-
5 oz/min
** Ultra Low Rate Application –For rates from 2
-
5 oz/min/row use a 12 foot length of metering tube.
To calculate oz/min/row: Oz/min/row = (GPA x MPH x spacing (inches)) ÷ 46.4
On/Off
Valves
B
Components
Liquid
Other tubes are available if needed for different application rates.
Not actual size
SureFire
Ag
Systems
