LESER Critical Service Safety Valve Type 447

Critical ServiceType 4472

Safety valves with PTFE full lining in the inlet and outlet area for highly corrosive media. Technical data

  • Cost-effective alternative to safety valves made of nickel-based materials
  • Delivery time: 2 weeks
  • CE_Europa_schwarz
  • VdTUEV
  • ASME_UV_USA_schwarz
  • EAC_Russland_schwarz
  • TS_Logo_China_schwarz
  • UKCA_Grossbritanien_schwarz
  • CRN_Kanada_schwarz

Applications & Industries

  • Chemistry
  • Petrochemical

The optimal solution for:

  • Chlorine applications
  • Acids and alkalis
  • Intermediates of the chemical industry
Bayer BASF_inv Wacker

Technical Features Type 4472

Set pressure (according to CE) 0.1 - 16 barg
Set pressure (according to ASME) 15 - 240 psig
Temperature (according to CE) -85 to 200 °C | -121 to 392 °F
Temperature (according to ASME) -29 to 200 °C | -200 to 392 °F
Capacity orifice F+ to P
Connections DIN EN 1092 DN 25 - DN 100
Connections ASME B16.5 NPS 1 - NPS 4
Flange class Inlet DIN EN 1092 PN 10 - PN 16
Flange class Inlet ASME B16.5 Class 150
Body material 1.0460, 1.0619 | WCB + Virginal PTFE
Narrowest flow diameter d₀ 23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀ 416 - 6648 mm² | 0.645 - 10.304 in²
Bellows material PTFE-TFM
Seat gasket Sealing plate
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