0802-B_Generators.pdf

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Vacuum Generators
Section B
zvp01
www.parker.com/pneu/vacgen
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Generators
Catalog 080-3/USA
Index
Generator Selection
How to Select a Generator
Vacuum Generators
Basic Vacuum Generators
4-7
MCA
MCA is a Venturi Generator for inline Mounting. MCA is lightweight Generator that can
be located directly on the cup fitting for space savings. Great for use with TYS level
compensators. Additional Pneumatic Control Valve is required to create vacuum flow.
8-11
CV
CV is a Venturi Generator for inline mounting, precision manufactured for long life.
Aluminum basic body includes exhaust muffler. Stainless Steel and Teflon options are
available for adverse environments. Additional Pneumatic Control Valve is required to
create vacuum flow.
12-15
CV-CK
CV-CK is a Venturi Generator with adjustable open contact mechanical switch for vacuum
confirmation. Great for low cost vacuum confirmation. Additional Pneumatic Control Valve
is required to create vacuum flow.
16-19
CV-VR
CV-VR is a Venturi Generator for inline mounting with an automatic blow-off function.
The CV-VR has an built in reservoir that automatically creates blow-off pressure when
compressed air flow to the unit is stopped . Typical vacuum systems that use blow-off
functions require two Pneumatic Control Valves. One to create vacuum flow and one for
part blow-off. The CV-VR eliminates the need for a second Pneumatic Control Valve
20-23
HF
HF - High Flow Series is a multistage vacuum generator. The HF Series is light
weight for end of arm applications with a space saving low profile design. HF Series
is intended for high flow vacuum applications that due to system porosity issues have a
low application degree of vacuum. These units are ideal for porous applications. The HF
Series comes standard with an integrated flow thru exhaust muffler. Additional Pneumatic
Control Valve is required to create vacuum flow.
24-25
CHF
CHF- High Flow Series is a multistage vacuum generator. CHF unit is intended for high
flow vacuum applications that due to system porosity issues have a low application
degree of vacuum. These units are ideal for porous applications. 4 bolt mounting pattern
with gauge opposite of vacuum and pressure inlet ports enables this generator to be
panel mounted. CHF Series comes standard with flow thru exhaust mufflers to reduce
clogging in dirty environments. Additional Pneumatic Control Valve is required to create
vacuum flow.
26-27
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Catalog 0802-/USA
Index
MC2
Vacuum Generators
Integrated Vacuum Generators
MC2 is a compact light weight 20mm wide Venturi generator with integrated components.
Great for high speed automation processes. MC2 Generator integrated components
include valves for vacuum and blow-off functions, blow-off flow regulating valve, exhaust
and vacuum filters. Optional pressure sensors can reduce cycle time and provide for
reduction of overall wiring with the MVS-201 Sensor. Additional Pneumatic Valves are
not required to create vacuum and blow-off functions. Inline versions can be mounted in
manifolds up to 8 stations.
MC is a Sub Compact 10mm wide integrated Venturi generator for high speed pick and
place applications. MC Generator integrated components include valves for vacuum and
blow-off functions, exhaust and vacuum filters. Optional MPS-9 pressure sensors with a 1
msec response time reduces cycle time. Additional Pneumatic Valves are not required to
create vacuum and blow-off functions. Inline versions can be mounting in manifolds up to
8 stations.
28-35
MC3
36-41
CVR2
CVR-2 has a higher flow rate than the MC2. CVR2 Generator integrated components
include valves for vacuum and blow-off functions, blow-off flow regulating valve, exhaust
,vacuum filters and a vacuum check valve. Optional pressure sensors reduce cycle
time and can provide for reduction of overall wiring with the MVS-201 Sensor. Air
economizing can be utilized with the vacuum check valve to conserve air consumption
during part transfer. Single units and Generator Manifolds up to 10 stations are
available.
CVK Venturi Generator is for higher vacuum flow rates than the CVR2. This unit can
be used for high-speed pick and place and material handling systems. CVK Generator
integrated components include valves for vacuum and blow-off functions, blow-off flow
regulating valve, exhaust ,vacuum filters and a vacuum check valve. Optional pressure
sensors reduce cycle time and can provide for reduction of overall wiring with the MVS-
201 Sensor. Air economized can be utilized with the vacuum check valve to conserve air
during part transfer. Inline versions can be mounted in manifolds up to 5 stations.
CEK Venturi Generator is a basic CVK Generator with the addition of a memory valve
that maintains the last state of air during an emergency stop or power loss. The CEK
Generator integrated components include valves for vacuum, air economizing, and
blow-off functions, blow-off flow regulating valve, vacuum filters and a vacuum check
valve. Optional pressure sensors reduce cycle time and can be used for air economizing
to conserve air during part transfer. Inline versions can be mounted in manifolds up to 5
stations.
CVXCEK Venturi Generator is a basic 2 station CEK Generator Manifold with the addition
of Emergency Stop Functions that maintains the last state of air during an emergency
stop or power loss. This unit can be used for high-speed pick and place and material
handling systems. CVXCEK Generator integrated components include valves for vacuum
and blow-off functions, blow-off flow regulating valve, exhaust ,vacuum filters and an
optional vacuum check valve. Air economizing can be utilized with the vacuum check
valve to conserve air during part transfer.
No additional PLC programming is required
for Air Economizing Functions because this function is built into the electrical unit.
42-49
CVK
50-57
CEK
58-63
CVXCEK
64-71
Glossary
Evacuation Time Chart - Basic Vacuum Generators
Vacuum Flow Chart - Basic Vacuum Generators
Evacuation Time Chart - Integrated Vacuum Generators
Vacuum Flow Chart - Integrated Vacuum Generators
72-73
74
75
76
77
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Generators
Catalog 080-3/USA
Technical Information
Vacuum Generators
Technical Data
. Design a system with all of the supporting components
integrated into the venturi generator.
Normally Closed
Vacuum Pilot Valve
Principle of Venturi Vacuum
A vacuum generator is a single stage venturi that creates
high vacuum with fast response using compressed air.
The ability to control this performance renders this
technology as an excellent solution for factory automation.
In principle, compressed air is throttled as the air exits the
nozzle and is discharged into the diffuser. This increased
velocity of air lowers the pressure in the diffusion chamber.
The volume of air within the closed vacuum system flows
into the low pressure area of the diffusion chamber and is
exhausted thru the diffuser. This effect increases the vacuum
level and evacuates most of the air within the closed vacuum
system at supersonic speeds.
Venturi
Check
Valve
Blow-off Flow
Adjustment
Nozzle
Diffusion
Chamber
Diffuser
Normally Closed
Blow-off Pilot Valve
Exhaust
Filter
Inlet
Pressure
Cup
Sensor
Vacuum
Flow
There are several advantages to an integrated venturi
system. The response time of the vacuum and blow-off
functions are greatly reduced compared to basic venturi
generators, the installation time is also reduced which makes
this a cost effective system and the compact size allows the
integrated unit to be close to the suction cup.
Additional Advantages to
Venturi Generators
•
No Moving Components
•
Low Maintenance
•
Long Life
•
Responsive
•
Physically Small
•
Cost Effective
Venturi Generator with Power Loss
Circuits
When designing a vacuum system that requires a Normally
Open circuit or Emergency Stop circuits to avoid any hazard
during a power failure, consider the circuits below and on the
following page.
Normally Open Circuit
Normally Closed
Vacuum Pilot Valve
Applying the Venturi Generator
There are two basic approaches when designing a vacuum
system with venturi generators.
. Design a system with basic venturi generators and
individual components to support the vacuum circuit.
Normally Closed
Air Supply
Normally Open
Master Valve
Normally Closed
Master Valve
Venturi
Check
Valve
Venturi
Blow-off Flow
Adjustment
Filter
Normally Closed
Blow-off Pilot Valve
Filter
Cup
Sensor
Cup
Sensor
4
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Catalog 080-3/USA
Technical Information
Valve Controlled
Emergency Stop Circuit
(See CEK Vacuum Generator)
Vacuum Generators
Technical Data
The Venturi System
Vacuum
Valve
On
Air
Economizing
Valve
A closed vacuum system has a volume of air within all the
components between the vacuum port of the venturi and the
suction cup. The venturi’s ability to evacuate this volume of
air when the suction cup forms a seal on the surface, creates
the pressure differential required to force the suction cup onto
the product.
Off
N.C. Master
Valve
Venturi
Blow-off
Pilot
Valve
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 the suction cup.
Flow
Control
Selecting the Appropriate Supply Valve
N.C. Master
Valve
Filter
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.
Nozzle
Diameter
0.5 mm
.0 mm
.5 mm
.0 mm
.5 mm
3.0 mm
Minimum Tube I.D.
inches (mm)
0.57 (4)
0.57 (4)
0.36 (6)
0.35 (8)
0.35 (8)
0.393 (0)
PFG Cup
Sensor
Flow (Cv)
0.6
0.6
0.379
0.65
0.95
.35
If pressure drops occur due to other pneumatic components
or a manifold venturi system, it may be necessary to increase
the valve and / or supply line tubing I.D..
Selecting the Nozzle Diameter with
Reference to Suction Cup Diameter
As a general guide, for most non-porous vacuum
applications, the nozzle diameter can be selected based on
the suction cup diameter previously determined in Section A.
Nozzle
Diameter
0.5 mm
.0 mm
.5 mm
.0 mm
.5 mm
3.0 mm
Maximum Suction Cup
Diameter
inches (mm)
.79 (0)
.97 (50)
.36 (60)
4.7 (0)
5.9 (50)
7.87 (00)
Designing a system with a single suction cup dedicated to a
single vacuum generator is ideal, however, it may not always
be practical. It is recommended that the sum of the areas of
multiple cups dedicated to a single venturi do not exceed the
area of the diameter of the single suction cups shown above.
5
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Generators

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