Technical Data; Performance Characteristics - coval GVMAX HD Serie Manual De Instrucciones Simplificado

GVMAX HD
Heavy Duty Communicating Vacuum Pumps

3. TECHNICAL DATA

3.1 Integrated Functions
GVMAX HD vacuum pumps include all the "vacuum" functions
required for an easy, efficient and economical use of com-
pressed air and suitable for any application:
➊ "Vacuum" solenoid valve
➋ Single-stage Venturi pump
➌ Open silencer
➍ "Vacuum" non-return valve
➎ Electronic vacuum switch
energy
90%
savings

3.2 Performance Characteristics

Vacuum
reached
Nozzle dia.
2.5 mm
3.0 mm
GVMAX HD vacuum pumps work in Air
Saving Control (ASC) mode. Once the
vacuum has been established, the mod-
ule does not consume any more air to
maintain the vacuum. The corresponding
energy savings are a major advancement
 90% energy savings on average.
Threshold L1: L1=-65 kPa, vacuum threshold that generates the DO1 "object gripped" signal.
Threshold L2 (only available when the ASC mode is enabled (ON)):
L2=-75 kPa, vacuum threshold that triggers the vacuum generation cut-off.
Recommendations: The L1 threshold (object gripped) must be lower than the L2 threshold
(ASC vacuum control).
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➏ Integrated electronics
➐ Pressure sensor
➑ "Blow-off" solenoid valve
➒ 350 µm filter screen
The combined action of the non-return valve ➍ and of the
integrated electronics ➏ automatically ensures ASC man-
agement.  Once the vacuum has been established, the
pump does not consume any more air to hold the object.
Evacuation time (seconds)
of a volume of 1 liter
-45 -55 -65
kPa kPa kPa
0.17 0.24 0.35 0.52
0.15 0.20 0.27 0.42
OVERVIEW OF THRESHOLDS 1 AND 2:
SIMPLIFIED OPERATING INSTRUCTIONS
Air drawn
Max.
vacuum
-75 (Nl/min)
(%)
kPa
(SCFM)
-85
185 (6.48) 294 (10.29)
-85
230 (8.05) 380 (13.30)
(kPa)V
Vmax=-85
L2=-75
L1=-65
DO1
0
Air
consumption
0
-4-
Air
in consumed
(Nl/min)
(SCFM)
3.3 Operation
Air Saving Control "ASC"
EN
Air
pressure
level
(bar)
5
5.5
t
t