Micron Technology Turbofan instruction manual Parallel Connection, Series Connection

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DRAFT

4.2.2Parallel Connection

The hydraulic motors of the Turbofan are normally connected in parallel.

To calculate the hydraulic flow required for a specific number of heads :-

each head runs at 4000 rpm

the oil flow required per motor is 4000 x 2ml/rev = 8 1/min

add 10% for pump and other hydraulic losses = 8.8 l/min

eg For 6 heads hydraulic flow required = 8.8 x 6 = 52.8 l/min

Alternatively if you know the maximum hydraulic flow available from the tractor or PTO pump, etc for the Turbofans then :

Maximum number of heads which can be installed = Maximum hydraulic flow available 8.8

eg If flow available = 72 l/min

then maximum number of heads (in parallel) = 72 = 8.18 = 8 heads 8.8

The pressure drop required per Turbofan Sprayhead is 100 bar (1500 psi) therefore the maximum pressure required by the total hydraulic system for parallel running = 100 bar (1500 psi).

4.2.3Series Connection

The preferred method of running Turbofan Sprayheads is in parallel. However, if more sprayheads are needed than can be connected in parallel, then series connection can be used, subject to the following:

A maximum of two motors must be used in each series chain.

A hydraulic system with a relief valve setting of 200 bar (or above) is necessary for series running (i.e. pressure drop of Turbofan unit x 2 = 100 bar x 2 = 200 bar).

It should be noted that most tractor hydraulic systems operate below this figure and are therefore unsuitable for running Turbofans in series (i.e. typical tractor hydraulic systems operate in the range 140 – 180 bar).

It must also be noted that if the hydraulic system is running at 200 bar (or above) then all of the components in the circuit must be capable of withstanding these pressures.

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Contents Turbofan Health and Safety Contents SectionMaintenance Parts List and DiagramIntroduction Turbofan spray head TEN KEY Points for Users Mounting of Sprayheads Typical sprayhead configuration for ground cropsSpacing of Sprayheads Angle of Sprayheads Hydraulic ConfigurationSeries Connection Parallel ConnectionHydraulic Pressure and Hose Size Selection Hydraulic Oil FlowHydraulic hoses Pressure drop alongHydraulic motor connections Hoses, Fittings and Motor ConnectionsPressure Surge Prevention System ProtectionSpeed Regulation Hydraulic OilFilter Open Centre System Filter Typical configuration of chemical feed to heads Daily inspection Health and Safety Calibration and Adjustment Coverage of sprayer Coverage of sprayer in ha/min ExampleApproximate flow rates for fixed restrictor orifices Each day after spraying Routine Maintenance Before each spray operationDraft Description QTY Turbofan Basic Parts List TBF/200Turbofan Parts Diagram KEY

Turbofan specifications

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