LESER - Test labs

Proving reliability


Only comprehensive tests and trials can ensure that safety valves will always function perfectly, even under extreme service conditions. LESER performs these tests not only in the development and design phases, but throughout the life of the product. For over 40 years, LESER has operated performance test labs for the media of steam, gases and liquids. Performance test labs for the media of gas and liquids are located at Hamburg Wendenstrasse, for the media of steam they are located at Müllverbrennungsanlage MV Rugenberger Damm.

LESER safety valves are approved by a large number of inspectorates and classification societies (e.g. TÜV, ASME/NB, Lloyd's Register, AQSIQ-China, DNV, GL). This ensures their suitability for service worldwide.

In addition, the LESER test labs are accredited as a "Prüfstelle" of the TÜV for types tests and as a "testing laboratory" of ASME/NB (the first one outside the USA).

Tests and trials:

  
Capacity
Determination of the coefficient of discharge and the capacities

Function
Determination of reseating and opening pressure, determination of the operating characteristic

Type test approvals
Type tests to the relevant standards 

Application
Simulation of operating conditions to ensure safe function even in special situations

Two phase flow
Design guidelines for special media 

Back pressure
Functional behaviour in special installations 

Bursting discs and change-over valves
Design guidelines for combination with safety valves 

Damping
Stable functional behaviour under all installation conditions 

Fatigue
Mechanical stability of the components under high numbers of load cycles 

Joukowski
Stability when subjected to shock wave 

Heat
Mechanical stability of the components and functional leak tightness under the influence of high temperatures


Test lab data
Maximum rate		 Air Water Steam
Location

Wendenstrasse

MV Rugenberger Damm
Year of construction

1984, Extention: 1997

2000
Storage volume

83 m³
 bei 100bar 8300 Nm³

50 m³

Large steam generator (powerstation)
DN max / NPS

400 / 16"

400 / 16"

400/16"
P max

100bar / 1.450psig

42bar / 610psig

40bar / 580psig

18bar / 261psig

Operating temperature T

Environment temperatur

Sup. S: 425°C/797°F 
Sat. S: 240°C/464°F
(Pmax 35bar)

Sup. S: 280°C/536°F
 Sat. S: 210°C/410°F

Mass flow continuous

75 t/h - 35.625 scfm

280 t/h - 1.240 gpm

Sup. S: 30 t/h - 66.140 pph
Sat. S: 15 t/h - 33.070 pph

Sup. S: 25 t/h - 55.116 pph
Sat. S: 25 t/h - 55.116 pph

Mass flow 
short time

190 t/h - 90.250 scfm

> 430 t/h - 1.900 gpm
(function test)

30 t/h / 66.140 pph

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TÜV-Approval

since 1983

2001

ASME-Approval

since 1994

since 1994

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rated capacities

24.964 scfm / 1.450 psig

1.057 gpm / 610 psig

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