4
INSTALLATION
5
INSTALLATION
• The components, pipes and valves that will be installed in the system must withstand a pressure higher than the maximum
one of the system.
• Any constriction in the system may lead to a faulty over-pressure.
• Make sure that hoses, hose tails and valve flanges feature a suitable and compatible diameter.
CAUTION: connect the power supply connector to the valve only after having completed the hydraulic connections.
OPERATING THE VALVE WITH ONE OR MORE INLETS/OUTLETS OPEN IS VERY DANGEROUS AND CAN CAUSE ACCIDENTS
AND SERIOUS INJURIES TO THE INSTALLATION OR MAINTENANCE PERSONNEL.
CAUTION: TO AVOID DAMAGING THE SYSTEM, MAKE SURE THAT NONE OF THE PARTS COMES INTO CONTACT WITH
MOVING PARTS OF THE FARMING MACHINE.
6
POSITION ON FARMING MACHINE
6.1
Hydraulic circuit
The 863T and 873T valves are components designed for the distribution of chemicals.
They are assembled with other elements to form electric control units with different configurations (ref. corresponding manual).
Additional couplings, O-rings and other additional parts (valves, filters, flowmeters, etc.) must be ordered separately (general
Arag catalog): when choosing the items, make sure that preset connections are correct for the valves (section 6.3 - 6.4).
Pompa
Filtro
Linea scarico
Linea pressione
Linea aspirazione
Cisterna
Fig. 1
Legend:
1
Boom section electric valves
2
Metered by-passes
3
Manifolds with pressure relief valve
6.2
Boom section electric valves
They open/close the corresponding boom section; in case of valves with metered by-passes, the valve closed position is the same as the drain
position of the corresponding metered by-pass.
6.2.1
Metered by-passes
Suitably adjusted, they allow maintaining the spraying pressure value constant when closing one or more boom sections.
6.2.2
Pressure relief manifolds
They allow resetting the pressure of the liquid that remains trapped between the section valves and the anti-drip valves, reducing the dripping.
1
3
2
Suction line
Drain line
Tank
Pressure line
Filter
Pump
