8
5.2.2 Electro pneumatic change-over
5.2.3 Hydraulic change-over (optional)
5.2.4 ELECTRIC EQUIPMENT
“DROPSA” electric equipment has been designed with the purposes of supplying a system that is complete with all commands
necessary for the automatic operation controlled by safety signals for centralised lubrication systems. The primary voltage is 400
VAC and 50 Hz, other voltages are provided upon request. For more information about the available versions, contact the
Dropsa technical sales department.
GENERAL NOTE FOR ALL ELECTROMAGNETIC INVERTERS
:
A 2-5 second de-energising delay should be set for the electromagnets to permit them to complete their
inversion after the closing time for the end of line pressure switch.
The main change-over
parts are:
•
a casing with a central lapping hole that makes it possible to
make a dry seal connection with the inversion piston, which
is facilitated by a balancing system;
•
a ground piston with a dual coupling surface, with grooves
that improve lubrication and the seal at high pressures;
•
the inversion phase is facilitated by a balancing system;
•
sealing gaskets that can support high pressure levels, by
means of a pressurised chamber, optimising the inverter
function;
•
Two single acting pneumatic actuating cylinders, controlled
by a 5/ 2 type solenoid valve.
Type of probe
Type of inverter Voltage
V
Code Electrical
apparatus VIP5 PRO
Code Electrical
apparatus VIP5
PLUS
Code Electrical apparatus
with PLC
LASER PROBE
(24V cc standard
version)
Out NO e NC
(1 threshold)
Electromagnetic
24 VDC
1639211
1639210
1637008
110 VAC
*
*
1637009
220 VAC
*
*
1637010
Electro pneumatic
24 VDC
1639211
1639210
1637011
110 VAC
*
*
1637012
220 VAC
*
*
1637013
LASER PROBE
24V cc Out 4÷20mA/2
NO (4 thresholds)
Electromagnetic
24 VDC
1639211
1639210
1637001
110 VAC
*
*
1637003
220 VAC
*
*
1637004
Electro pneumatic
24 VDC
1639211
1639210
1637005
110 VAC
*
*
1637006
220 VAC
*
*
1637007
The pump can also be equipped with a hydraulic change-over valve that
activates when the pressure is made on each line.
The pressure indicator is equipped with a pin that allows the operator to
visualize the operation of the valve.
The valve can also be equipped with cycle sensor (certified for hazardous
areas) to monitor the inversion phases of the valve.
Photo 4
