Schmalz SCPMb Operating and maintenance instructions

Maintenance instructions
Compact Ejector SCPMb, SCPMc, SCPMi,
SCPMt (b, c, i)
WWW.SCHMALZ.COM EN-US · 30.30.01.03570 · 00 · 08/23

Note
The Maintenance instructions were originally written in German. Store in a safe place for future refer-
ence. Subject to technical changes without notice. No responsibility is taken for printing or other types of
errors.
Published by
© J.SchmalzGmbH, 08/23
This document is protected by copyright. J.SchmalzGmbH retains the rights established thereby. Repro-
duction of the contents, in full or in part, is only permitted within the limits of the legal provisions of
copyright law. Any modifications to or abridgments of the document are prohibited without explicit writ-
ten agreement from J.SchmalzGmbH.
Contact
J. Schmalz GmbH
Johannes-Schmalz-Str. 1
72293 Glatten, Germany
T: [phone]
[email protected]
www.schmalz.com
Contact information for Schmalz companies and trade partners worldwide can be found at:
www.schmalz.com/salesnetwork
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Contents
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Contents
1Important Information ...................................................................................................................................4
1.1 Note on Using this Document.............................................................................................................4
1.2 The technical documentation is part of the product ........................................................................4
1.3 Symbols.................................................................................................................................................4
1.4 Warnings in This Document ................................................................................................................ 5
2Maintenance ...................................................................................................................................................6
2.1 Safety Instructions ...............................................................................................................................6
2.2 Illustrations...........................................................................................................................................6
2.3 Cleaning the Ejector ............................................................................................................................6
2.4 Replacing the Silencer Insert...............................................................................................................7
2.5 Replacing the Valve ............................................................................................................................. 9
2.6 Changing the Piston ..........................................................................................................................10
2.7 Replacing the Non-return Valve .......................................................................................................13
3Spare and Wearing Parts.............................................................................................................................. 15

1 Important Information
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1Important Information
1.1Note on Using this Document
J.SchmalzGmbH is generally referred to as Schmalz in this document.
The document contains important notes and information about the different
operating phases of the product:
• Transport, storage, start of operations and decommissioning
• Safe operation, required maintenance, rectification of any faults
The document describes the product at the time of delivery by Schmalz and is aimed at:
• Installers who are trained in handling the product and can operate and in-
stall it
• Technically trained service personnel performing the maintenance work
• Technically trained persons who work on electrical equipment
1.2The technical documentation is part of the product
1. For problem-free and safe operation, follow the instructions in the documents.
2. Keep the technical documentation in close proximity to the product. The documentation must be ac-
cessible to personnel at all times.
3. Pass on the technical documentation to subsequent users.
ðFailure to follow the instructions in these Maintenance instructions may result in injuries!
ðSchmalz is not liable for damage or malfunctions that result from failure to heed these instructions.
If you still have questions after reading the technical documentation, contact Schmalz Service at:
www.schmalz.com/services
1.3Symbols
This symbol indicates useful and important information.
üThis symbol represents a prerequisite that must be met before an action is performed.
4This symbol represents an action to be performed.
ðThis symbol represents the result of an action.
Actions that consist of more than one step are numbered:
1. First action to be performed.
2. Second action to be performed.

1 Important Information
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1.4Warnings in This Document
Warnings warn against hazards that may occur when handling the product. The signal word indicates the
level of danger.
Signal word Meaning
WARNING
Indicates a medium-risk hazard that could result in death or serious injury if
not avoided.
NOTE
Indicates a danger that leads to property damage.

2 Maintenance
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2Maintenance
2.1Safety Instructions
Maintenance work may only be carried out by qualified personnel.
4Create atmospheric pressure in the ejector’s compressed air circuit before working on the system!
WARNING
Failure to follow the instructions in these Maintenance instructions may result in in-
juries!
4Read the Maintenance instructions carefully and observe the contents.
WARNING
Risk of injury due to incorrect maintenance or troubleshooting
4Check the proper functioning of the product, especially the safety features, after every
maintenance or troubleshooting operation.
NOTE
Incorrect maintenance work
Damage to the ejector!
4Always switch off the supply voltage before carrying out maintenance work.
4Secure it so that it cannot be switched back on.
4The ejector must be operated only with a silencer and press-in screen(s).
2.2Illustrations
The illustrations shown below may deviate from the customer’s version because they serve as
examples of different versions of the product.
2.3Cleaning the Ejector
1. For cleaning, do not use aggressive cleaning agents such as industrial alcohol, white spirit or thin-
ners. Only use cleaning agents with pH 7–12.
2. Remove dirt on the exterior of the device with a soft cloth and soap suds at a maximum tempera-
ture of 60°C. Make sure that the silencer is not soaked in soapy water.
3. Ensure that no moisture can reach the electrical connection or other electrical components.

2 Maintenance
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2.4Replacing the Silencer Insert
Heavy infiltration of dust, oil, and so on, may contaminate the silencer insert and reduce the suction ca-
pacity. Cleaning the silencer insert is not recommended due to the capillary effect of the porous material.
If the suction capacity decreases, replace the silencer insert:
üDeactivate the ejector and depressurize the pneumatic systems.
1. Place a small flat screwdriver on the ejector as
shown and loosen the clamp.
2. Remove the clamp.
3. Then remove the silencer and silencer insert
from the ejector.

2 Maintenance
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4. Pull the silencer insert out of the housing and
dispose of it.
5. Insert the new silencer insert into the housing
and reinstall the silencer.
6. Mount the clamp in the correct position.
ðThe clamp is mounted flush with the un-
derside of the ejector and the clamp legs
both lie in the grooves. It does not pro-
trude from the ejector.
7. Check that the silencer is held tightly by
pulling on the housing (hand-tight).

2 Maintenance
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2.5Replacing the Valve
1. Remove the two screws on the side.
2. Remove the upper part from the housing.
SA
ð(S) suction valve
ð(A) blow off valve
3. Release and remove the two screws (1) on the
faulty valve.
1

2 Maintenance
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4. Remove the valve (2) from the housing.
2
5. Ensure that the sealing frame (3) is correctly
mounted/fitted on the new valve.
3
6. Install the new valve in the reverse order.
2.6Changing the Piston
CAUTION
The valve piston flies out of the housing borehole at high speed due to a strong
compressed air pulse.
Risk of injury to persons, and eye injuries in particular!
4Wear eye protection.
4Do not look into the housing borehole for the valve piston at the moment that com-
pressed air is introduced into the compressed air connection.
4When disassembling the valve piston, start with a small amount of compressed air and
slowly increase the pressure until the valve piston comes loose and moves out of the
housing borehole.