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aNH3 Equaply System:

Accurate control of anhydrous ammonia containing both gas and liquid phases is difficult.  Standard cold flow systems do an excellent job of applying consistent amounts of anhydrous ammonia over a field, but they don’t provide equal flow to each injector knife.  Heat exchangers cool the ammonia below its boiling point before entering a flow meter and control valve.  With only liquid present, the valve can exert near perfect control.  However, when the anhydrous goes through the control valve it loses pressure and boils, creating a mixture of liquid and gas.  This mixture cannot be precisely split in a manifold. So distribution among the knives is random and variable.  The Equaply™ system increases pressure above the boiling point and splits liquid at the manifolds, resulting in even row to row amounts.

Strip-till farmers can see the effects of poor anhydrous ammonia distribution.  In strip-till, corn rows and ammonia are in the same place. When distribution is unequal some rows get more vapor and less liquid. Streaking is then visible across the width of toolbar application. Conventional tillage farmers are less likely to see uneven distribution.  It is common to over-apply so the rows with less ammonia still have an adequate amount. Also, ammonia is applied on a diagonal application and planted corn rows don’t coincide. 

 

Features of the aNH3 Equaply™ system are:

1.   A pump to boost the pressure of anhydrous ammonia coming from the nurse tank.  This pump maintains constant pressure of ammonia distributed to knives.  Anhydrous ammonia can be applied consistently over a wide variation in tank pressure, even on a very cold day.

2.   Orifices are used at the manifold for each line going to an injection knife.  These orifices keep anhydrous ammonia as a liquid until it has been split equally between the openers or knives

3.   A flow control system is used to assure that the application rate of anhydrous ammonia is constant and to allow for variable rate application.

 

4.  The Equaply™ system is unitized for easy installation on a toolbar.  Installation involves bolting the main assembly and manifolds to the tool bar.  All major piping has already been done.  Hooking up hydraulic lines from the tractor and plastic anhydrous hoses completes the installation.  After hook up to the nurse tank and instrument connections to the controller, the system is ready to apply anhydrous ammonia.

Description of the aNH3 Equaply™ system-

Nurse Tank Connection- The Equaply™ system requires an Acme coupler with high flow globe valve at the nurse tank. A 1¼" anhydrous ammonia hose connects to a high flow breakaway at the inlet to the heat exchanger. For high flow rates, the use of dual tanks is suggested, particularly during cold weather. Also, we recommend that your fertilizer dealer install high flow 1¼" valves on the tank outlets in place of the  usual 1" valves. The Equaply™ system does not require bottom outlet tanks.

Heat Exchanger-  

In systems without pumps, vapor makes most flow meters inaccurate. A heat  exchanger cools anhydrous ammonia below its boiling point and condenses the vapor phase to a liquid. Once liquid pressure has been increased by the pump, the anhydrous ammonia is at a pressure that has a significantly lower boiling point. The Equaply™ uses specially ported Hiniker heat exchangers for increased flow. Our larger flow models have two heat exchangers in parallel.  A basket strainer after the exchanger catches solids from the nurse tank. A strainer after the pump collects particles that could clog  an orifice. A safety valve protects against over pressurization from solar heating when a charged system is not in use.

Pump- The pump assembly is perhaps the most important part of our system for equal distribution.  We use a Hypro centrifugal pump with a hydraulic motor because it doesn't surge like piston pumps. The  pump keeps anhydrous ammonia as a liquid until it can be evenly split at the manifold. This is important because vapor affects distribution as it takes the easiest path. For example, if there is a circular manifold on a toolbar which tilts down to the left on a hillside, vapor will tend to go out of the hose barbs which are  up and to the right.  For custom applicators, the most important reason for a pump is the ability to apply  at full rate when it’s cold. Standard delivery systems have to slow down during late fall and early spring, when temperature and tank pressure are low, to achieve a desired application rate.

Flow and Measurement Control- The Equaply™ uses a Hiniker or Raven flow sensor and servo valve. Signals from the flow sensor go to a cab console which operates the servo valve. The flow sensor has maximum accuracy because it sees only liquid.  We also offer systems with flow meters and servos to interface with AgLeader Insight, Raven, and John Deere Greenstar II. To verify equal row distribution, we highly recommend a gauge tree to monitor flow to the individual rows. 

Manifolds and Orifices- After the servo valve, anhydrous ammonia goes to one or more manifolds controlled by an electrically operated on/off valve.  TeeJet orifices at the manifold are housed in special fitting assemblies which allow the use of conventional 3/8" EVA ammonia tubing or smaller Teflon® tubing sizes.  The fitting assemblies also connect lines to the gauge tree.
   If large rate variations are necessary, we can widen the range with Impellicone manifolds.  At lower rates, the manifolds will be dividing a mix of liquid and gas which is inherently less accurate than dividing liquid alone.  However, the Impellicone manifolds are the best possible way to divide this  mixture so you will still get reasonable distribution row to row.

Coming Soon: Single versus Double Cooler Benefits


Have you seen this before? 

A plugged anhydrous knife can cause you to have that not-so-fashionable yellow   streak across your corn field.  That streak also takes the green out of your pocket. 

With the increasing cost of ammonia, it is essential to know that your fertilizer is being placed correctly into the soil.  A gauge tree helps to ensure that the fertilizer application is accurate by monitoring the flow pressure to each knife. 

 Don’t lose sleep worrying about if a knife was plugged.  You’ll know that fertilizer was applied        correctly through each knife with a gauge tree.

Gauge Tree (option)- The aNH3 Equaply Gauge Tree provides information for each anhydrous knife.  The gauges are numbered and monitor each individual row.  The gauge tree is shown to the right.


 

 

 

 


aNH3 Equaply:

aNH3 Equaply System aNH3 Equaply SystemMinden, NE Toolbar Minden, NE Toolbar
Minden, NE Toolbar Minden, NE Toolbar
Yetter Avenger Coulters on 24' Toolbar - 18" center spacing using Equaply System. Minden, NE

aNH3 Equaply  aNH3 Equaply on DMI 17 Row Nutri-Placr
aNH3 Equaply on DMI 17 Row Nutri-Placr

Wing shutoff with Impellicone manifold and electric valve.
Wing Shutoff with Impellicone manifold and electric valve.  Note: Orifice fittings with both gauge tree hose and opener hose. 

aNH3    aNH3 field view from distance  aNH3 field view close up  Field View

Standard Equaply™ Unit on a John Deere 1895 Air Seeder

JBI Enterprises is your authorized aNH3 Equaply™ dealer. 

   
© 2011          JBI Enterprises, LLC               All Rights Reserved                Last Updated 09/16/2011