LESER Series 483 Clean Service Safety Relief Valve

Scope of design

• Valve sizes d0 13 mm through d0 25 mm
• Materials: 1.4404 / 316L, 1.4435 / 316L stainless steel as a standard
• Standard soft seat for superior tightness
• Packed knob, packed lifting lever, gastight cap or pneumatic lifting device

No bacteria traps or contamination due to

• Minimum dead space design and flushmounting capability
• Wetted-part surfaces in compliance with European Hygienic Pipes Standard DIN 11866 and ASME BPE
• Gap and crevice-free design of internals
• Standard elastomer bellows for protection of the hard to clean parts
• Self-draining body design, avoids residues and reduces corrosion
• Use of FDA and USP VI compliant elastomers

Automatic plant operation during production and cleaning

• Optional pneumatic lifting device for cleaning in place (CIP) or sterilizing in place (SIP)
• Optional proximity switch to indicate the operating condition of the valve
• Self-draining body design and aseptic O-ring disc with bellows (HyTight Assembly) assure a cleanable outlet of the valve

Ease of plant design, installation and operation

• Variety of capacities and versions to fit any application
• Multiple choice of sanitary connections
• Single trim for steam, gas and liquid for less spare parts and easier maintenance
• Outlet chamber sealed from bonnet by EPDM bellows
• Crevice-free fastening of all elastomer parts
• Exposed, rinsed O-rings
• No bacteria traps or contamination