Type 438 | LESER - The Safety Valve
LESER Compact Performance Safety Valve Type 438
LESER Compact Performance Safety Valve Type 438

Compact Performance

Type 438

Safety valve with o-ring disc

Approvals

LESER Compact Performance safety valves of Type 438 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 438

Nominal Diameter Inlet - Thread
G 3/8 - 1 | NPT 1/2" - 1"
Nominal Diameter Inlet - Flange
DN 15 - DN 25 | 1/2" - 1"
Actual Orifice Diameter d₀
10 mm | 0.394 in
Actual Orifice Area A₀
78.5 mm² | 0.122 in²
Pressure
5 - 180 bar | 72.5 - 2610 psig
Flange Rating Inlet
PN40 - PN400 | CL150 - CL2500
Temperature (in accordance with DIN EN)
-29 to 150 °C | -49 to 302 °F
Temperatur (nach ASME)
-45 to 150 °C | -49 to 302 °F
Material Outlet Body
1.4104, 1.4404 | SA 479 430, SA 479 316L
Material inlet body
1.4104, 1.4404 | SA 479 430, SA 479 316L
Valve Connection
Thread acc. to DIN ISO 228-1, DIN ISO 7-1 / BS 21 or ASME B1.20.1, Flange acc. to DIN EN 1092-1 or ASME B16.5
Bellows Material (optional)
No bellows
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, RINA, DNV GL, BV
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