LESER Clean Service Safety Valve Type 481
LESER Clean Service Safety Valve Type 481

Clean Service

Type 481

Safety valve with small capacities at high set pressures


LESER Clean Service safety valves of Type 481 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 481

Nominal Diameter at Inlet
DN15 - DN25 | 3/4" - 1"
0.5 x D
Actual Orifice Diameter d₀
10 mm | 0.394 in
Actual Orifice Area A₀
78.5 mm² | 0.122 in²
0.1 - 68 bar | 1.5 - 986 psig
Temperature (in accordance with DIN EN)
-45 to 250 °C | -49 to 482 °F
Body Material
1.4404 | SA 479 316L
Valve Connection
Clamps acc. to ASME BPE, DIN 32676 or ISO 2852 Threaded connection acc. to DIN ISO 228 or ASME B 1.20.1, Aseptic clamps acc. to DIN 11864 T1 Series A or B (with nut) or DIN 11851, Neumo-Sterile thread (with nut)
Load Type
Spring loaded
PED/ DIN EN ISO 4126-1, PED/ AD 2000-Merkblatt A2, ASME Sec. VIII Div. 1, CRN, AQSIQ, EAC
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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