SCHUNK MV Series User instructions

Translation of the original manual
Micro valve
MV 15 - 30
Assembly and operating manual
Superior Clamping and Gripping

Imprint
2 01.03|MV 15 - 30|en
Imprint
Copyright:
This manual remains the copyrighted property of SCHUNK GmbH & Co. KG. It is solely
supplied to our customers and operators of our products and forms part of the product.
This documentation may not be duplicated or made accessible to third parties, in
particular competitive companies,
without our prior permission.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: GAS 380381
Edition: 01.03 |06/05/2015|en
© SCHUNK GmbH & Co. KG
All rights reserved.
Dear customer,
congratulations on choosing a SCHUNK product. By choosing SCHUNK, you have opted for
the highest precision, top quality and best service.
You are going to increase the process reliability of your production and achieve best
machining results – to the customer's complete satisfaction.
SCHUNK products are inspiring.
Our detailed assembly and operation manual will support you.
Do you have further questions? You may contact us at any time – even after purchase.
Kindest Regards
Yours SCHUNK GmbH & Co. KG
Spann- und Greiftechnik
Bahnhofstr. 106 – 134
D-74348 Lauffen/Neckar
Tel. [phone]
Fax [phone]
[email protected]
www.schunk.com

Table of contents
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3
Table of contents
1 About this manual .................................................................................................... 4
1.1 Warnings................................................................................................................... 4
1.2 Applicable documents .............................................................................................. 4
2 Basic safety notes .................................................................................................... 5
2.1 Intended use............................................................................................................. 5
2.2 Ambient conditions and operating conditions......................................................... 5
2.3 Product safety........................................................................................................... 6
2.3.1 Protective equipment ................................................................................... 6
2.3.2 Constructional changes, attachments, or modifications.............................. 6
2.4 Personnel qualification............................................................................................. 6
2.5 The use of personal protective equipment.............................................................. 7
2.6 Notes on particular risks........................................................................................... 7
3 Warranty.................................................................................................................. 8
4 Scope of delivery ...................................................................................................... 8
5 Technical data .......................................................................................................... 9
6 Assembly and installation........................................................................................ 10
6.1 Mechanical connection .......................................................................................... 10
6.2 Electrical connection .............................................................................................. 11
6.3 Dismantling micro valve ......................................................................................... 12
6.4 Installing and connecting the micro valve.............................................................. 12
6.5 Realigning the connection cable ............................................................................ 14
6.6 Start-up................................................................................................................... 15
7 Troubleshooting ...................................................................................................... 16
7.1 Valve does not open when switched on ................................................................ 16
7.2 Valve is "not tight" when switched off................................................................... 16
8 Maintenance and care ............................................................................................. 17

About this manual
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About this manual
This instruction is an integral part of the product and contains
important information for a safe and proper assembly,
commissioning, operation, maintenance and help for easier trou-
ble shooting.
Before using the product, read and note the instructions,
especially the chapter "Basic safety notes".
Warnings
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons.
Non-compliance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons.
Ignoring a safety note like this can lead to irreversible injury and
even death.
CAUTION
Dangers for persons.
Non-observance can cause minor injuries.
NOTICE
Material damage
Information about avoiding material damage.
Applicable documents
•General terms of business
•Catalog data sheet of the purchased product
The documents listed here, can be downloaded on our homepage
www.schunk.com
1
1.1
1.2

Basic safety notes
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5
Basic safety notes
Intended use
The product is designed exclusively to control compressed air.
The product is intended for installation in a machine/system. The
requirements of the applicable guidelines must be observed and
complied with.
The product may be used only in the context of its defined applica-
tion parameters (5, Page 9).
The product is not a safety component in accordance with the EC
Machine Directive 2006/42/EC and must not be used in safety-
relevant parts of machine control units.
Ambient conditions and operating conditions
•Make sure that the product has a sufficient size for the applica-
tion.
•Make sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. Exceptions
are products that are designed especially for contaminated en-
vironments.
2
2.1
2.2

Basic safety notes
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Product safety
Dangers arise from the product, if:
•the product is not used in accordance with its intended
purpose.
•the product is not installed or maintained properly.
•the safety and installation notes are not observed.
Avoid any manner of working that may interfere with the function
and operational safety of the product.
Wear protective equipment.
NOTE
More information are contained in the relevant chapters.
Protective equipment
Provide protective equipment per EC Machinery Directive.
Constructional changes, attachments, or modifications
Additional drill holes, threads, or attachments that are not offered
as accessories by SCHUNK may be attached only with permission
of SCHUNK.
Personnel qualification
The assembly, initial commissioning, maintenance, and repair of
the product may be performed only by trained specialist
personnel. Every person called upon by the operator to work on
the product must have read and understood the complete
assembly and operating manual, especially the chapter "Basic
safety notes" (2, Page 5). This applies particularly to personnel
only used occasionally, such as maintenance personnel.
2.3
2.3.1
2.3.2
2.4

Basic safety notes
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7
The use of personal protective equipment
When installing or removing the product, observe the relevant
health and safety at work rules and use the required personal
protective equipment (protective gloves, safety boots and safety
goggles).
Notes on particular risks
The general rule is:
•Remove the energy supplies before installation, modification,
maintenance, or adjustment work.
•Ensure that no residual energy remains in the system.
•Do not move parts by hand when the energy supply is
connected.
•Do not reach into the open mechanism or the movement area
of the unit.
•Perform maintenance, modifications, and additions outside the
danger zone.
•For all work, secure the product against accidental operation.
•Take particular care during maintenance and disassembly.
•Only qualified personnel may disassemble the product.
WARNING
Danger of damage to hearing and uncontrolled hose movement
due to escaping compressed air!
If compressed air hoses are pulled off "under pressure",
compressed air will escape under high pressure.
•Depressurize and vent elements carrying compressed air
before removal.
WARNING
Warning: Risk of injury when the machine/system moves
unexpectedly!
Remove the energy supplies before starting with assembly and
adjustments.
Make sure that no residual energy remains in the system.
2.5
2.6

Scope of delivery
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Warranty
If the product is used as intended, the warranty is valid for 24
months from the date of delivery from the production facility un-
der the following conditions:
•Observe the applicable documents (1.2, Page 4)
•Observance of the ambient conditions and operating conditions
(2.2, Page 5)
Parts touching the work piece and wearing parts are not part of
the warranty.
Scope of delivery
The scope of delivery includes
•Micro Valve MV in the ordered model.
3
4

Technical data
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9
Technical data
Size MV 15 MV 25 MV 30
Mechanical operating data
Weight [kg] 0.038 0.045 0.122
Connection pneumatic hose internal [mm] 4 4 6
Operating temperature [°C]
1
Micro valve min.
Valve cartridge max. (surface temperature)
Screw cap max. (surface temperature)
Fixed cover max. (surface temperature)
-15
+80
+50
+80
Sealing material Viton - incompatible with hot water,
steam, amines, organic acids and polar
solvents
Protection class IP
Variants with fixed cover or
screw cap without air duct
Variants with screw cap and air duct
40
65
Electrical operating data
Operating voltage see data sheet / catalog
Electrical connection M8 plug, cable extension with open wire
strand
Outer diameter connection cable [mm] 3.1 ±0.15
Power consumption [W] see data sheet / catalog
Operating data for compressed air connection
Pressure medium Filtered compressed air, dry or lubricated,
compressed air purity classes acc. to
ISO 8573-1:2010 [7:4:4]
Function 3/2 or 2/2 directional control valve
Pressure range V, LP, P, see data sheet / catalog
Nominal diameter [mm] 1.5 2.5 3.0
Nominal flow rate according to ISO 6358
[Nl/min]
45 135 175
1The operating temperature is the minimum ambient temperature of the micro valve and
the maximum surface temperature of the corresponding component.
The maximum permissible ambient temperature depends on the installation situation and
the duty cycle of the micro valve.
More technical data are included in the catalog data sheet. Whichever is the latest versi-
on.
5

Assembly and installation
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Assembly and installation
Mechanical connection
NOTICE
Damage to the connection cable is possible!
The connection cable could be damaged by twisting when a valve
cartridge with a fixed cover is mounted.
•The connection cable must be able to move freely when a
valve cartridge with a fixed cover is screwed in.
Swivel fitting tightening torque
Connection with screws max. tightening torque [Nm]
M3 0.7
M5 1.5
G1/8" 10.0
G1/4" 15.0
Comply with the following procedure when mounting the micro
valve:
•If the micro valve is supplied as a complete component,
dismantle the micro valve into its individual components and
then install the individual components:
– Dismantling the micro valve into its individual components,
(6.3, Page 12).
– Installing the individual components, (6.4, Page 12).
•If the micro valve is supplied in individual components, install
the individual components, (6.4, Page 12).
6
6.1

Assembly and installation
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11
Electrical connection
NOTICE
Damage to the cable is possible.
The bending radius of the cable is not allowed to be less than the
minimum amount:
•Static: 10 times the cable diameter.
•Dynamic: 15 times the cable diameter, suitable for cable
tracks.
NOTE
Route and secure the connection cable so there are no tensile and
twisting forces on the valve cover. Tensile and twisting forces can
cause the screw cap to come loose and lead to contact problems.
PIN allocation M8 plug and cable color table extension
PIN Cable color Assignment
1 Brown n.c.
3 Blue GND
4 Black Control voltage,
+24 VDC
Screw cap with LED:
If the connection cable of the micro valve has been connected
correctly to the electrical power supply, the LED in the screw cap
will light up when the 24 VDC voltage is applied.
6.2

Assembly and installation
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Dismantling micro valve
Dismantling micro valve
1 Undo the knurled screw on the valve cover (3).
NOTE
In valves with fixed covers, the valve cover with connection cable
cannot be removed.
2 Remove the valve cover (3) with connection cable and
accessory (4).
3 Unscrew the valve cartridge (2) from the swivel fitting (1).
Installing and connecting the micro valve
WARNING
Risk of injury when working on the micro valve!
•Switch off the energy supply.
•Switch off the compressed air supply.
NOTICE
Damage to valve cartridges, valve cover and accessories!
Valve cartridge, valve cover and accessories can be damaged by
using tools.
•Only install or remove the valve cartridge, valve cover and
accessories by hand.
6.3
6.4

Assembly and installation
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13
Micro valve
NOTE
Always install the micro valves in the following sequence, for
example to avoid unscrewing the screw cap from the valve
cartridge if an accessory is fitted subsequently.
1 Screw the hollow screw of the swivel fitting (1) lightly into the
pneumatic unit (7), without tightening.
2 Turn the swivel fitting (1) to the desired position and hold it
firmly.
3 Tighten the hollow screw of the swivel fitting (1) in this positi-
on
Maximum torque, see Swivel fitting tightening torque table.
4 Screw the valve cartridge (2) into the swivel fitting (1) as far as
possible
Maximum torque 3 Nm.
5 Screw the accessory (5) into the valve cover (3)
Maximum torque 3 Nm.
6 Put the valve cover (3) on the cartridge (2) with the connecti-
on cable (4) in the required position.
7 Push the valve cover (5) onto the cartridge (2) and screw tight
with the knurled nut onto the cartridge (2)
Maximum torque 3 Nm.
8 Connect the pneumatic hose to the pneumatic connection (6)
of the swivel fitting (1).
9 Connect the micro valve to the electrical power supply,
(6.2, Page 11).

Assembly and installation
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Realigning the connection cable
NOTICE
Risk of damage to the contacts!
The contacts can be damaged if the valve cover is screwed on
firmly and the alignment of the connection cable changed.
•Define the position of the connection cable when the valve
cover is put on.
Valve cover
Carry out the following steps if the position of the connection cab-
le should be changed:
1 Unscrew the knurled nut (1) of the valve cover (3) from the
valve cartridge (2).
2 Remove the valve cover (3) from the valve cartridge (2).
3 Put on the valve cover (3) again with the connection cable in
the required alignment and hold it in position.
4 Tighten the valve cover (3) on the valve cartridge (2) with the
knurled nut (1).
6.5

Assembly and installation
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15
Start-up
WARNING
Risk of injury due to objects falling or being ejected from the
machine/automated system!
•Check whether all micro valves are tight prior to the start-up
or restart.
Micro valves with the LP / P pressure range need a minimum
supply pressure in order to work. These micro valves are only able
to switch with this pressure support.
1 Supply pressure in the pressure range of the micro valve, see
catalog data sheet.
2 Apply the operating voltage.
The LED on a screw cap lights up.
3 Check whether the micro valve opens.
The supply pressure is put through to the valve outlet.
4 Switch off the operating voltage.
The LED on a screw cap goes out.
5 Check whether the micro valve closes.
The valve outlet is separated from the supply pressure and,
in the case of 3/2 control valves, is ventilated via the vent
connection in the valve cover.
6.6

Troubleshooting
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Troubleshooting
Valve does not open when switched on
Possible cause Solution(s)
Compressed air supply is too low, micro
valve only opens with pressure support
depending on the design
Increase the supply pressure to the mini-
mum operating pressure, (5, Page 9).
Micro valve not screwed in as far as possible Check the thread of the swivel fitting,
(6.4, Page 12).
Screw in the valve cartridge completely.
Incorrect polarity (only possible with micro
valve with a valve cover and recovery diode)
Make the correct connection assignment,
(
6.2, Page 11).
Supply voltage too low Check the supply voltage, see catalog data
sheet.
Valve is "not tight" when switched off
Possible cause Solution(s)
Connection with screws or valve cartridge
not tightened correctly
Tighten connections with screws of the indi-
vidual components,
(
6.4, Page 12).
Foreign object on the sealing face or sealing
contour
Clean the sealing face and sealing contour,
(8, Page 17).
Observe the incompatibility of the sealing
material,
(
5, Page 9).
Supply pressure too high
Reduce the supply pressure to the maximum
operating pressure,
(
5, Page 9).
7
7.1
7.2

Maintenance and care
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17
Maintenance and care
NOTE
Contact SCHUNK service if changes take place on the micro valve
that impair safety.
Micro valves are maintenance-free.
If the requirement on the compressed air are not complied with,
clean the micro valve at the following points:
•The piston sealing face P and the sealing contour in the swivel
fitting can be cleaned with a soft cloth. Do not use solvents.
•In the 3/2-way valve variant, blow out the piston sealing face R
and the sealing contour in the valve cartridge with compressed
air via opening R.
8

Notes
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Notes

Notes
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19
Notes

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