13
3 - Description
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 diff erent options on the sprayer – to the operating unit, to the TurboFiller, to the bottle cleaner, to the
Powder mixer in strainer etc., all according to confi guration of options. The suction manifold in same area allows suction
from main tank, rinsing tank or external water source, if fi tted, depending on its confi guration.
The pressure side of the liquid circuit is fi tted with a safety valve to protect the circuit against misuse of excessive pressure.
See chapter “Safety valve”
Diaphragm pump
Pumps with a diaphragm: Models 321/10 (max. 20 bar) or 363/7 (max. 20 bar)
They are low pressure and robustly built. Use only grease for lubrication. The 363 model has six diaphragms and the 321
has two. 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 for internal cleaning of the liquid circuit. The function
is selected by turning the handle of the valve towards the desired
function.
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 identifi ed by coloured discs fi tted on the valves themselves. The symbols correspond to the optional
accessories, and are located on the discs for quick identifi cation and handling. To activate/open a function, turn the lever
to the desired function.
ATTENTION: Only the functions to be used should be activated – the other valves should always be kept closed.
ATTENTION: If the handle of a MANIFOLD valve is too tight – or too loose (loss of fl uid)– the valve needs to be
serviced. For more information, see the section on ‘Maintenance’.
