Hardi Mercury Series, Instruction Book

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3 - Description
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Liquid system
General information
All the suction system functions are operated via a 3-way valve. The pressure valve is also to be found in the pressure circuit.
The low pressure circuit is called HLC (Hardi Liquid Circuit).
The liquid circuit
Consist of manifold system in the working zone (front part) where pressure manifold receives liquid from the pump, and
distributes to the different options on the sprayer – to the operating unit, to the bottle cleaner, to the Powder mixer in
strainer etc., all according to configuration of options. The suction manifold in same area allows suction from main tank,
rinsing tank (only on Zaturn) or external water source, if fitted, depending on its configuration.
The pressure side of the liquid circuit is fitted with a safety valve to protect the circuit against misuse of excessive pressure.
See chapter “Safety valve”
Diaphragm pump
Pumps with a diaphragm: Models 364/7 or 464/10
They are low pressure and robustly built. Use only grease for lubrication. This type of pump is self-priming, works without oil
and can run dry as long as necessary.
Valves
The suction valve is located above the pump and is used to select where to suck liquid from. Either suction from the main
tank for spraying or from the rinse tank (Rinse tank only available on Zaturn) for internal cleaning of the liquid circuit. The
function is selected by turning the handle of the valve towards the desired function.
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ATTENTION! If one of the handles is too tight - or too loose (=liquid loss) - the valve needs to be serviced. For more
information, see section on “Maintenance”.
Valves and symbols
The valves are identified by coloured discs fitted on the valves themselves. The symbols correspond to the optional
accessories, and are located on the discs for quick identification and handling. To activate/open a function, turn the lever to
the desired function.
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ATTENTION: Only the functions to be used should be activated – the other valves should always be kept closed.
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ATTENTION: If the handle of a MANIFOLD valve is too tight – or too loose (loss of fluid)– the valve needs to be serviced.
For more information, see the section on ‘Maintenance’.