LESER Compact Performance Safety Valve Type 459
LESER Compact Performance Safety Valve Type 459
LESER Compact Performance Safety Valve Type 459

Compact Performance

Type 459

Safety valve with metal to metal sealing or sealing plate

Approvals

LESER Compact Performance safety valves of Type 459 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 459

Nominal Diameter Inlet - Thread
1/2" - 1 1/2" | 1/2" - 1 1/2"
Nominal Diameter Inlet - Flange
DN 15 - DN 25 | 1/2" - 1"
Actual Orifice Diameter d₀
9 - 17.5 mm | 0.354 - 0.689 in
Actual Orifice Area A₀
63.6 - 241 mm² | 0.099 - 0.374 in²
Pressure
0.2 - 250 bar | 2.9 - 3626 psig
Flange Rating Inlet
PN 40 - PN 400 | CL150 - CL2500
Temperature (in accordance with DIN EN)
-273 to 450 °C | -459 to 842 °F
Temperatur (nach ASME)
-196 to 450 °C | -321 to 842 °F
Material Outlet Body
1.0619, 1.4408, 0.7043 | SA 216 WCB, SA 351 CF8M, Duktil Gr. 60-40-18
Material inlet body
1.4104, 1.4404 | SA 479 430, SA 479 316L
Valve Connection
Thread acc. to DIN ISO 228-1, ISO 7-1 / BS 21 or ASME B1.20.1, Flange acc. to DIN EN 1092-1 or ASME B16.5
Bellows Material (optional)
Stainless steel, elastomer and hastelloy
Load Type
Spring loaded
Approvals
PED/ DIN EN ISO 4126-1, AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC
Classification societies
LR, DNV GL, BV, ABS
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Compact Performance Catalogue

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