DROPSA MiQueL, User Operating And Maintenance Manual, Page: 2 / 12

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1. INTRODUCTION
This user and maintenance manual relates to the MiQueL air/oil modular minimal system.
The latest version may be obtained from the Technical-Commercial Office, or by consulting our website
http://www.dropsa.com .
This user and maintenance manual contains important information about protecting the health and safety of the
personnel who intend to use this apparatus. You must read and look after it carefully, making sure that it is available at all
times for the operators who intend to consult it.
2. GENERAL DESCRIPTION
MiQueL is an Air/oil modular minimal system available in 3 versions:
- PRO : module with solenoid valve
- BASE : module without solenoid valve
- CART : module without solenoid valve, without oil adjustment and fixed flow rate.
-
BASE NO-EV
: module with pneumatic valve activation
All versions can be equipped with solenoid valve for independent control of each module,
“
-
i
” VERSION.
Operation
The system consists of a pressurised lubricant tank, one or more mixture regulation modules, pipes and spray nozzles (see
hydraulic diagram below).
The lubricant contained in the tank

is pressurised by the air and sent to the mixing modules

through a pipe inside
the tank.
Each module has oil

(NO CART version) and air

check valves that are controlled manually by the operator. The
outward oil and air flow can be managed independently between the different modules using a mini solenoid valve

(
“-
i
”
version only) or a pneumatic valve (
"NO-EV"
version only) that activates the control valves

on the module. The module
has a compensation valve

(
“PRO”
version only) which is able to keep the flow rate constant as the inlet tank pressure
and outlet counter-pressure varies.
The lubrication pipes can be traditional or coaxial. In the latter case, the lubricant and nebulisation air are transported
separately to the nozzle. The piston

keeps the oil from dripping from the nozzle when the lubrication operation is
complete.
Hydraulic diagram
Spray nozzles
When traditional pipes are used, the air and oil are already mixed when they arrive at the nozzle.
If coaxial pipes are used, the nozzle mixes the air and oil at the point to be lubricated. The lubricant is atomised in
minuscule particles by the air flow that passes in front of the oil outlet hole.
The geometry of the nozzle is designed based on the type of spray to be obtained (conic, blade-shaped, etc.).
Advantages
•
Easy to install on the machine
• Reduction in tool wear
•
Improved surface finish on the part
•
No lubricant residuals left on the part when the
work is complete
•
The nozzles do not drip after being turned off
•
Large spray range (up to 300 mm)
•
Greater safety and environmental hygiene at the
workplace
Application
•
Machine tools
• Machines for cutting and bending plate
•
Steelworks
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