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Best Availability

Additional products for higher plant availability

Change-over valve in combination with pressure relief valves

  • Most economical solution for redundant protection
  • Flow-optimized design for minimal inlet pressure loss
  • Modular system for adaptation to required connection diameters and pressure stages
  • Robust and maintenance-free design and simple changeover
  • Short delivery times synchronized with the pressure relief valves
  • Complete, coordinated combination of one supplier with qualified resistance coefficients

Bursting discs with pressure relief valves in combination

  • Tight up to the set pressure
  • Protection of the pressure relief valve against corrosion and sticking
  • Component-tested combination of pressure relief valve and bursting disc: Compliance with the 3% criterion - no consideration of the bursting disc in the sizing process


LESER Change-over valves are designed, marked, produced and approved according to the requirements of the following regulations:

  • LESER CE Approvel
  • LESER EAC Approvel
  • LESER CRN Approvel

Valve Types

Type 320 Flow

Change-over valve casted

DN 25 - DN 300 (1'' - 12'' )

Type 330 Compact

Change-over valves casted

DN 25 - DN 400 (NPS 1'' - NPS 16")

Bursting discs

Safety valve - Bursting-disc combination

DN 25 - DN 150 (1" - 6")

Technical data change-over valve

Nominal Diameter at Inlet
DN 25 - DN 400 | 1" - 16"
Temperature (in accordance with DIN EN)
-273°C to +450°C | -459°F to +842°F
Body Material
1.0619, 1.4408 |WCB/WCC, LCB, CF8M
Valve Connection
Flange in accordance with DIN EN 1092-1 and ASME B 16.5

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