Webservice Maintenance

MAINTENANCE - The maintenance manual from LESER

Do 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. 

Download the file of the desired product group and find all the information in one PDF:

Product group Type Bild2

API 526
Compact Performance 437, 438, 439, 237, 459, 462
High Performance 441, 442, 444, 455, 456, 457 ,458
Modulate Action 431, 433
Clean Service 481, 483, 484, 485, 488
High Efficiency 811, 821
Critical Service 447


Follow these steps

You will find the type of safety valve on the component plate, the first three digits of the item number describe the type of safety valve.

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


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


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

Find your Spare Part
Contact LESER Teaser

Contact LESER

Send a message to LESER


Contact finder

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

Find your local contact

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