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LESER – The Safety Valve: Pressure relief valves from Europe’s biggest manufacturer for all industrial applications.

Products
Fig.No. Flange class Applications Size/Orifice Working Pressure Available Standard Materials
API  – Series 526 (ASME)

 

 Class 150 x 150 to Class 2500 x 300
  • Petrochemical industry
  • Chemical industry
  • All applications where API is specified
 1“ x 2“ … 8“ x 10“

Orifice: D … T

 1.5 psig … 6,000 psig

– 450° F … 1,000° F

 WCB, LCB, CF8M, WC
HIGH PERFORMANCE  – Type 441, 442, XXL, Full Nozzle, 444, 457, 458 (ASME)
 

 

 

  Class 150 x 150 to Class 2500 x 300
  • Chemical industry
  • Heating, Venting, Air conditioning (HVAC)
  • Power plants (ASME VIII)
  • Paper industry
 1“ x 2“ … 16“ x 20“ 1.5 psig … 4,350 psig

–  450° F … 1,000° F

 WCB, CF8M, WC6
COMPACT PERFORMANCE – Type 437, 438, 439, 459, 462, HDD (ASME)
 

 

 Class 150 x 150 to Class 2500 x 2500
  • Chemical industry
  • LNG / LPG / Cryogenic systems
  • High pressure
  • Technical gases
 3/8“ x  1/2“ … 1“ x 11/2“

Orifice: D … F

 1.5 psig … 12,330 psig

– 450° F … 800° F

 Ductile Gr. 60 – 40 – 18, SA 479 430, 316L
CLEAN SERVICE – Type 481, 483, 484, 485, 488 (ASME)      
  PN 10 … PN 25
  • Food and Beverage industry
  • Pharmaceutical industry
  • Cosmetic industry
  • Chemical industry
  d0 0.394 inch … d0 3.622 inch

Orifice: D … P

 1.5 psig … 986 psig

– 49° F … 482° F

 316L
CRITICAL SERVICE –  Type 447, 449       
  Class 150 x 150 to Class 300 x 150
  • Chemical industry
  • High corrosive applications
  1“ x 1 ½“ … 4“ x 6

Orifice: G … N

 1.5 psig … 232 psig

– 20° F … 392° F

 WCB
BEST AVAILABILITY – Type 310 Change over Valve    
   Class 150 x 150 to Class 900 x 900 1“ x 1“ … 16“ x 16“ – 454° F … 752° F WCB, CF8M
   MODULATE ACTION – Type 427, 429, 431, 433, PN160 (PED)
  • Thermal expansion
  • Pumps and compressors
  DN 15 … DN 150

Orifice: D … M

 0,15 bar … 160 bar

– 270° C … + 450° C

PN 16 … PN 160

 0.6025, 0.7043, 1.0619, 1.4408