LOHSE CNA Series - User Manual

Questions and Answers

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Angela ClineAug 18, 2025
What to do if my LOHSE CNA has leakage along the flow-through section?
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  Jeremy WebsterAug 18, 2025
  If you notice leakage along the flow-through section of your LOHSE Control Unit, it could be due to a few reasons. First, check for any object jammed between the valve plate and housing; if there is, slightly open the valve to remove the object and then repeat the closing procedure. Another cause could be a defective seal in the flow-through section, in which case you should dismantle the valve and replace the seals. If it's a pneumatically operated valve, check the stroke and readjust if necessary. If it is an electrically operated valve, check the stroke and adjust the travel-controlled limit switch if necessary.
R
Rebecca ClarkAug 23, 2025
How to fix leakage at the flange connection of my LOHSE Control Unit?
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  Haley JohnsonAug 23, 2025
  Leakage at the flange connection of your LOHSE Control Unit can be fixed by addressing a few potential issues. If the valve was jammed during installation, loosen the flange bolts and reinstall the valve according to the instructions. If the flange seal is defective, you'll need to dismantle the valve and replace the flange seals. Also, check to see if a flange seal is missing and install one if necessary.
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Michael GoodSep 4, 2025
How to stop external leakage from the packing chamber of my LOHSE CNA Control Unit?
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  Peter McintoshSep 4, 2025
  To stop external leakage from the packing chamber of your LOHSE Control Unit, first, check if the packing is not tight enough; if so, retighten the packing and lubricate the valve plate. If the packing is defective, replace it and clean and grease the valve plate.
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Malik JohnsonNov 10, 2025
Why is my LOHSE CNA Control Unit valve stiff and difficult to close or open?
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  George MoraNov 10, 2025
  A stiff LOHSE Control Unit valve can occur for several reasons. It might be blocked or have a dirty valve plate, which requires dismantling, cleaning, and lubricating the valve plate. Overly tight flange bolts, especially through bolts, can also cause this issue, so try loosening them. If the flange bolts are too long, remove them from the threaded bores, check their length, and replace them if needed. Insufficient fastening can also cause stiffness, so ensure it is fastened according to the manual. Other potential causes include a defective manually operated valve stem (check, clean, and grease), low operating pressure in pneumatically operated valves (check and increase pressure), a blocked control valve (clean it), defective line connections (check and replace), or a defective piston (d...
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mburgessDec 1, 2025
What to do if the valve plate of my LOHSE CNA Control Unit cannot be moved?
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  Brittany BrownDec 1, 2025
  If the valve plate of your LOHSE Control Unit cannot be moved, several factors could be responsible. Start by checking if the flange bolts are too long; if so, remove them from the threaded bores, check their length, and replace them as needed. Also check if the lubricant has washed off, and if so, clean and lubricate the parts. Ensure sufficient fastening according to the manual. For manually operated valves, inspect the stem and replace any defective parts. For pneumatically operated valves, verify the operating pressure supply. Check the control valve for power, and if the control valve is blocked or defective, clean or replace it as necessary. Other potential causes include a defective cylinder seal (check and replace if needed), a broken connection between the cylinder rod and valve p...

LOHSE CNA Series Specifications

General

Brand	LOHSE
Model	CNA Series
Category	Control Unit
Language	English

LOHSE CNA Series - User Manual

Table of Contents

Questions and Answers

LOHSE CNA Series Specifications