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product page - LESER best availability. change over valves.


Additional products for higher plant availability

LESER change-over valve.

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

  • Equipment that enables the following pressure relief valve characteristics:

  • 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:

ce-mark logo
EAC logo
CRN logo

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 Specifications for LESER Change-Over Valves

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



Access all the necessary documents and detailed information for pressure relief valves in our download area.

LESER Best availability catalogue
View or Downlod
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