LESER Critical Service Safety Valve Type 447

Critical Service

Type 447

Safety valve with full PTFE-lining at the inlet and outlet area for corrosive media

Industries

Approvals

LESER Critical Service safety valves of Type 447 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

Technical specifications Type 447

Nominal Diameter at Inlet
DN 25 - DN 100 | 1" - 4"
Actual Orifice Diameter d₀
23 - 92 mm | 0.91 - 3.62 in
Actual Orifice Area A₀
416 - 6648 mm² | 0.645 - 10.304 in²
Pressure
0.1 - 16 bar | 1.45 - 232 psig
Flange Rating Inlet
PN 16 | CL150
Temperature (in accordance with DIN EN)
-85 to 200 °C | -121 to 392 °F
Temperatur (nach ASME)
-29 to 200 °C | -200 to 392 °F
Body Material
1.0406, 10619, 1.0570 + Virgin PTFE | SA 216 WCB
Valve Connection
Flange acc. to DIN EN 1092-1 or acc. to ASME B 16.5
Bellows Material (optional)
PTFE
Load Type
Spring loaded
Approvals
PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC
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