DYNANAV Dynaflow 2 Посібник з монтажу та експлуатації - Сторінка 13

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Flow Control Installation Guide

Valve and Flow Meter

Flow Motor and Flow Meter Placement

The Flow Control Valve should generally be placed downstream of the on/off/bypass valve, however, if that

is not physically possible then it can be placed before the Bypass On/Off valve. See some configuration

diagrams in Appendix.

The Flow Meter ideally should be placed either right before Flow Control Valve or at least 18" downstream

from the Flow Control Valve. This is to minimize the flow turbulence on the Flow Meter, as such, if

downstream from any valve (On/Off) or pump, it should be kept as far away as possible.

Selecting the right size of Flow Meter and Flow Control Valve

Flow Control valve and Flow Meter size should be selected for the mid-range of your operating flow. If the

Flow Control valve is too large, it will try to control the complete flow in a very tiny range of the valve

movement. As such, it will not regulate properly.

To calculate your maximum and minimum Flow Rates, you can enter the values into the Flow Calculator on

our website on the GPM_Calculator tab of the Flow Control Calculator found here

https://dynanav.com/support/calculators/

By calculating your GPM or LPM for the full operating range of the speed, Swath Width and Gallons per

Acre or Liters per Hectare, you will determine the correct Flow Valve and Flow Meter to install. The size of

the Flow Meter should be selected to fit the range of your calculated GPM or LPM.

Determine Operating Flow of system

Determine the actual operating Gallons per Minute or Liters per Minute (GPM or LPM) of the system by the

following:

1. Do your Test Flights while the Flow Control Valve is fully open and with the desired nozzles installed on

the boom,

2. Looking at the Flow Control system showing Flow in either GPM or LPM, at maximum speed for the

maximum pump pressure (fan operated pump) note the value of the GPM or LPM as Maximum flow. At

this point, the Boom Pressure should be above the suggested nozzle operating pressure.

3. Find out the minimum full open Flow of the system by reducing the speed of the aircraft to absolute

minimum and again make sure the boom pressure is in the operating range of the spray nozzles.

Boom Pressure

Your Boom Pressure should be operated in the range of the specifications of the nozzles for the correct

spray droplet size.

Boom pressure should always be well above the Check Valve pressure so that the Flow control variance

will be well within its range. This will require proper selection of Spray Nozzle types and number of nozzles

to get in range of your operating speeds and operating flow.

Boom Pressure Sensor (Digital), if installed will give a digital feedback of your boom pressure. If using a

DynaNav systems DynaFlow Digital Boom Pressure sensor, you can set the pressure at which the GPS

marking will be on/off. This pressure setting should be significantly above the check valve pressure as well

as significantly below the operating pressure range of the boom.

730 – 11731 BAYNES ROAD, PITT MEADOWS, BC, CANADA, V3Y 2B4

WEB PAGE:

www.dynanav.com

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PHONE: 604-465-0009

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