Page 75 - Parker - Vacuum products

Catalog 0802-E Vacuum Generators
Generator Selection Technical Data

Valve controlled emergency stop circuit Selecting the appropriate supply valve
(See CEK Vacuum Generator) If a basic venturi generator is selected, correct sizing of the air
supply valve and supply line are critical to the performance of
the unit.
Vacuum
Air
Valve Economizing
On Valve Nozzle Minimum Tube I.D. Flow (Cv)
Diameter inches (mm)
0.5 mm 0.157 (4) 0.16
1.0 mm 0.157 (4) 0.16
1.5 mm 0.236 (6) 0.379
2.0 mm 0.315 (8) 0.65
Off
N.C. Master Venturi 2.5 mm 0.315 (8) 0.95 B
Valve
3.0 mm 0.393 (10) 1.35
Blow-off
Pilot If pressure drops occur due to other pneumatic components or
Valve
a manifold venturi system, it may be necessary to increase the
valve and / or supply line tubing I.D..
Flow Generator Selection
Control Selecting the nozzle diameter with reference
to suction cup diameter MCA, CV, CV-CK

N.C. Master Filter As a general guide, for most non-porous vacuum applications,
Valve
the nozzle diameter can be selected based on the suction cup
diameter previously determined in Section A.
Sensor CHF
PFG Cup Maximum suction cup diameter
Nozzle diameter
Inches (mm)
0.5 mm .79 (20) MC22
1.0 mm 1.97 (50)
1.5 mm 2.36 (60)
2.0 mm 4.72 (120)
2.5 mm 5.91 (150) MC72
3.0 mm 7.87 (200)

The venturi system Designing a system with a single suction cup dedicated to a CEK
A closed vacuum system has a volume of air within all the single vacuum generator is ideal, however, it may not always
components between the vacuum port of the venturi and the be practical. It is recommended that the sum of the areas of
suction cup. The venturi’s ability to evacuate this volume of air multiple cups dedicated to a single venturi do not exceed the CVXCEK
when the suction cup forms a seal on the surface, creates the area of the diameter of the single suction cups shown above.
pressure differential required to force the suction cup onto the
product. MPS-23

MVS-201

Generator Accessories

The evacuated air creates a lower air pressure within the
closed vacuum system, causing the atmospheric pressure to
apply a uniform force on the surface of the cup. This holding
force is proportional to the difference in pressures and area of Glossary
the suction cup.

B5 Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatics