Webservice Maintenance

MAINTENANCE - The maintenance manual from LESER

You want to maintain or repair a LESER safety valve? Then MAINTENANCE offers you an extensive range of documents for the maintenance and repair of the LESER product groups:

  • API Series 526                            
  • Compact Performance
  • High Performance
  • Modulate Action
  • Clean Service
  • High Efficiency - POSV

You will find detailed information on the following topics:

  • Maintenance fundamentals of LESER Safety Valves
  • Repair process
  • Suggested equipment for assembling, disassembling and rework of critical parts
  • Disassembly, including sectional drawings
  • Rework of critical parts including an overview of critical dimensions
  • Assembly, including options
  • Spring charts
  • Testing procedures (set pressure and leak tests)
  • Spare parts lists
  • Guidelines for inspection, storage and transport
  • Trouble shooting

This is what you do

Download the file of the desired product group and find all the information in one PDF. In addition, you can watch maintenance videos for the pilot operated safety valve (POSV).

API Series 526
Compact Performance
High Performance / Modulate Action
Clean Service
High Efficiency / POSV


LESER recommends that maintenance and repair be carried out by a LARC (LESER authorized repair center).


Certificates of your LESER Safety Valve

Download Certificates
LESER Pressure Relief Valve Spare Parts Teaser

Spare part finder

Spare parts for your LESER Safety Valve

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Contact LESER

Contact LESER

Send a message to LESER


Contact finder

Your local contact person will support you with all questions concerning the safety valve.

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