API
API Safety Valve from LESER

Pressure relief valves according to API 526 with standardized capacities and dimensions

  • Compliance with API 526
  • Diverse selection of high-alloy materials available as standard
  • Longer lifetime due to hardened discs, partly stellited seats and integrated shielding of the optional bellows
  • Single trim: Identical internal parts for S/G/L for cost-effective maintenance
  • LESER Nanotightness: Exceeds the tightness requirements of API 527 by 50%

Approvals

LESER API safety valves are designed, marked, produced and approved according to the requirements of the following regulations:

  • LESER CE Approvel
  • LESER ASME Approvel
  • LESER EAC Approvel
  • LESER Chinese TS Approvel

Valve Types

Type 526

Fulfillment of API 526

DN 25 - DN 200 (1" - 8")

Technical specifications API

Nominal Diameter at Inlet
DN 25 - DN 200 | 1" - 8"
Actual Orifice Diameter d₀
14 mm - 161.5 mm | 0.551 in - 6.36 in
Actual Orifice Area A₀
154 mm² - 20,485 mm² | 0.239 in² - 31.75 in²
Pressure
0.12 bar - 413.7 bar | 2 psig - 6,000 psig
Temperature (in accordance with DIN EN)
-268 °C bis 538 °C | -450 °F bis 1,000 °F
Body Material
1.0619, 1.4408, 1.7357 | SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Valve Connection
Flange in accordance with ASME B 16.5 or DIN EN 1092
Bellows Material (optional)
INCONEL 625
Load Type
Spring-loaded
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