LESER High Efficiency POSV Type 821

High EfficiencyType 821

The pilot-operated safety valves of the Type 821 - Modulate Action - open modulating. Technical data

  • pilot-operated satefy valves according to API 526 - Modulate Action.
  • CE_Europa_schwarz
  • VdTUEV
  • ASME_UV_USA_schwarz
  • CRN_Kanada_schwarz
  • TS_Logo_China_schwarz
  • EAC_Russland_schwarz
  • UKCA_Grossbritanien_schwarz
  • Vogel
  • Bureau-Veritas
  • LloydsRegister
  • RINA-1861
  • DNV
  • US-Coast-Guard

Applications & Industries

  • Chemistry
  • Oil & Gas
  • Petrochemical
  • Energy
  • Technical gases
  • LNG & LPG
  • Other industries
 

The optimal solution for:

  • the protection of vapors, gases and fluids
  • operation at up to 91% from set pressure
  • Counterpressures of up to 70% from set pressure
Burckhardt-compression_inv Johnson-Controls BP

Technical features Type 821

Set pressure(according to CE) 2.5 - 426 bar | 36 - 6,179 psig
Set pressure (according to ASME) 2.5 - 689 bar | 36 - 10,000 psig
Temperature(according to CE) -45 to 200 °C (individual case: -162 to 300 °C)
Temperature(according to ASME) -49 to 392 °F (individual case: -259.6 to 572 °F)
Capacity orifice D - T+
Connections DIN EN 1092 DN 25 - DN 200
Connections ASME B16.5 NPS 1 to NPS 8
Flange class Inlet DIN EN 1092 PN 10 - PN 400
Flange class Inlet ASME B16.5 Class 150 - Class 2500
Body material1.0619, 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)
Narrowest flow diameter d₀ 11 - 180 mm | 0.433 - 7.087 in
Narrowest flow area A₀ 95 - 25,446.9 mm² | 0.147 - 39.443 in²
Seat gasket Soft sealing, Metallic, Sealing plate





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