Type 483 | LESER - The Safety Valve
LESER Clean Service Safety Valve Type 483
LESER Clean Service Safety Valve Type 483

Clean Service

Type 483

Safety valve with small to medium capacities, best cleanability and a variety of aseptic connections


LESER Clean Service safety valves of Type 483 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 483

Nominal Diameter at Inlet
DN 25 - DN 40 | 1" - 2"
D - F
Actual Orifice Diameter d₀
13 - 25 mm | 0.512 - 0.984 in
Actual Orifice Area A₀
133 - 491 mm² | 0.206 - 0.761 in²
0.1 - 16 bar | 1.5 - 232 psig
Temperature (in accordance with DIN EN)
-45 to 150 °C | -49 to 302 °F
Body Material
1.4435 (BN2) | SA 479 316L
Valve Connection
Clamps acc. to ASME BPE, DIN 32676, ISO 2852, Aseptic clamps acc. to DIN 11864 T1 Series A or B (with nut) or DIN 11851, Neumo Sterile thread (with nut), Welded end connection acc. to DIN 11850, Flange acc. to DIN 11864 T2 Series A or B, Aseptic flange Nut flange, Smooth flange, Varivent connection
Bellows Material (optional)
Load Type
Spring loaded
PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, ASME Section XIII certified for Section VIII Div. 1 service, CRN, AQSIQ, EAC
HyTight Assembly Designed and manufactured acc. to: DIN 11866, ASME BPE, EN 1672-2, DIN ISO 14159, USP class VI and FDA 21 CFR
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