Clean Service
Clean Service Safety Valve from LESER

Safety valves for food, beverage and pharmaceutical applications

  • Better cleaning through:
    • Low dead space ratio L/D from up to < 0.33
    • HyTight Assembly: gap-free design of the internal parts
    • Surfaces packages according to ASME BPE and DIN 11866 with a high surface quality up to Ra max = 0.375 µm / 15 µinch
  • Easy process integration through cleaning (CIP) or sterilizing (SIP) with pneumatic lifting device possible
  • Worldwide approvals, FDA-compliant elastomers and a wide range of aseptic connections
  • Alternative to bursting disc


LESER Clean Service safety valves 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

Valve Types

Type 481

Small capacity at high set pressure

DN15 - DN25 (3/4" - 1")

Type 483

Small to medium capacity, best cleanability and a variety of aseptic connections

DN 25 - DN 40 (1" - 2")

Type 488

High capacity, variety of aseptic connections

DN 25 - DN 100 (1" - 4")

Type 485

Small to medium capacity, low dead space ratio through weldable integrated pipework connection

Type 484

Small to medium capacity, low dead space ratio through weldable vessel connection

Technical data Clean Service

Nominal Diameter at Inlet
DN 15 - DN 100 | NPS 3/4'' - NPS 4''
Actual Orifice Diameter d₀
10 mm - 92 mm | 0.394 in - 3.622 in
Actual Orifice Area A₀
78.5 mm² - 6648 mm² | 0.122 in² - 10.304 in²
0.1 bar - 68 bar | 1.5 psig - 986 psig
Temperature (in accordance with DIN EN)
-45 °C to 250 °C | -49 °F to 482 °F
Body Material
1.4404, 1.4435 (BN2) | SA 479 316L
Valve Connection
Large Selection of Aseptic Connections: Threaded, Flanged, Clamped, Welded
Bellows Material (optional)
Load Type
Valvestar from LESER


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