Unigreen Campo 11 Use And Maintenance Manual
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Contents
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14 unigreen4.8 PRESSURE REGULATORTo use the pressure regulator, follow the instructions in the enclosed handbookscrupulously. The pressure regulator controls all of the most important sprayingfunctions, the thorough knowledge of its functions makes work easier andmore precise.The working pressure and the maximum pressure of the sprayer aredetermined by the pressure regulator which also protects the circuit fromoverpressure in any work conditions. (In serious but very rare cases, if theconnecting pipes get blocked the pressure relief valve lets the pressure off)In some setups there may be a pump that can reach a pressure of 50 barcontrolled by a regulator designed for 20 bar. In this case the maximumpressure that can be reached is 20 bar.The regulators can be manual, mounted on the sprayer or at a distance tomake the controls easier to use; or electrical with a control panel in the cabin.There are also regulator versions with mechanical remote controls with a cable.If the tractor has a waterproof cabin the use of electrical controls is obligatory.4.8.1 COMPONENTS OF THE PRESSURE REGULATORBelow you will find the indications for the main models fitted on Unigreenproducts.A main ON-OFF command: “open” lets the fluid flow into the circuit in use;“closed” empties the tank.B maximum pressure valve: adjusted by hand with the relevant knob (drainsthe excess liquid when the set pressure is reached).C boom section tap: opens the corresponding boom or drains to thecompensation regulator (G).D auxiliary tap: can be used for various accessories (it is always manual).E volumetric pressure valve (proportional):(when present) it regulates the spraying pressure. The valve automaticallycompensates variations in speed (within the scope of the same gear ratio),keeping the quantity of liquid supplied per surface unit (litres/hectare)unchanged.F self-cleaning filter: filters the delivery liquid.G compensation regulators: suitably regulated, these make it possible tokeep the pressure constant when one or more sections of jets is closed, theydon’t influence treatments with the boom fully open.H manometer: indicates the working pressure.Connections:R1 supply unionR2 drain unionR3 volumetric drain unionR4 boom section delivery unionR5 auxiliary delivery unionControl box for ERGO and REMO electrical regulatorsI1 main control valve switchI2 volumetric pressure valve switch (proportional)I3 boom section valves switches4.8.2 GENERAL INSTRUCTIONSWhen using the pressure regulator, scrupulously observe the instructions in theenclosed handbook, below you will find generic indications for the major mod-els fitted by Unigreen.All the regulation and adjustment tests must be carried out with clean wa-ter.Pressure regulators without a volumetric valve (GCP3-way - RPN - RVA)Adjusting the maximum pressure valve= put main control A in the drain position (“OFF”).= loosen the hand wheel of maximum pressure valve B completely (anticlock-wise).= start the pump by activating the power-takeoff of the tractor at 540rpm= open main control A (position “ON”), the manometer will be activated= open all of the section valves C (position “ON”)= adjust maximum pressure valve B to the working value (in any case lessthan the safe maximum pressure the system can reach).Don’t use the sprayerwithout having consulted theenclosed handbookGCP 3-way |
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