Modulate Action

Type 431 / 433

Safety valve with medium capacities and a large proportional opening range

Approvals

LESER Modulate Action safety valves of Type 431 / 433 are designed, marked, produced and approved according to the requirements of the following regulations:

Technical specifications Type 431, 433

Nominal Diameter at Inlet
DN 15 - DN 150 | 1/2" - 6"
Actual Orifice Diameter d₀
12 - 92 mm | 0.47 - 3.62 in
Actual Orifice Area A₀
113 - 6648 mm² | 0.175 - 10.3 in²
Pressure
0.2 - 40 bar | 2.9 - 580.15 psig
Flange Rating Inlet
PN 16 - PN 40 | CL150 - CL300
Temperature (in accordance with DIN EN)
-270 to 450 °C | -454 to 842 °F
Body Material
0.6025, 0.7043, 1.0619, 1.4408
Valve Connection
Flange acc. to DIN EN 1092 or acc. to ASME B16.5
Bellows Material (optional)
Stainless steel and elastomer
Load Type
Spring loaded
Approvals
PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, AQSIQ, EAC
Classification societies
LR, RINA, DNV GL, BV, ABS
Specials
Units converted; No approvals acc. to ASME

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