Clean_Service_EN
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Clean Service Clean Service Safety Relief Valves Series 48X CATALOG Clean Service Catalog Edition February 2012 02.2012 The-Safety-Valve.com LESER GmbH & Co. KG 20537 Hamburg, Wendenstr. 133-135 20506 Hamburg, P.O. Box 26 16 51 Fon +49 (40) 251 65-100 Fax +49 (40) 251 65-500 E-mail: sales@leser.com www.leser.com The-Safety-Valve.com E

Type 485 Product group Surface quality High operating to set pressure ratio, high backpressure or low total height? Yes High Efficiency Medium­ controlled Valve finder No Clean Service application? Type 5034 Yes Integrated pipework connection LESER Surface package Clean Service Type of surface Clean finish Area Description HyClean finish Sterile finish B65 B66 B67 Ra max. Ra max. Option code No. Ra max. LESER Surface grade No Yes No Yes API No Steam, gas and liquid application with low capacity in relation to valve size? Yes Modulate Action Spring loaded API specified application? 8 M2 M1...

Valve finder How to select the right Clean Service Safety Valve Type Orifice Features 0,5 x D Cleanability Inlet Cleanability Outlet Capacity Valve dead space ratio1) Description 481 L/D < 1,5 Designed for small capacity; Type 481 offers protection for installations in which Clean Service properties are required only at the valve inlet, e. g. protection of gas systems for the bottling of beverages. L/D < 1,5 Designed for small to medium capacity; Type 483 has optimized Clean Service properties for applications requiring clamp connections. Type 483 is applicable in all Clean Service areas...

General Contents Overview Page LESER Type Page General 5 Type 488 35 Applications and References, General design features 6 HyTight Assembly 7 Materials • HyTight Assembly 36 Surface Quality 8 Surface Definition 9 How to order • Article numbers 38 LESER Surface Packages 10 39 Clamp and threaded connections – Overview 11 Pressure temperature ratings • Metric Units + US Units Clamp connections – Dimensions 12 Low dead space 14 Dimensions and weights • Metric Units • US Units 40 41 Available options 42 Selection chart H8 43 Surface quality 46 LESER Type Page Type 481 15 Materials •...

General General Information LESER – Clean Service Safety Valves The Clean Service product group represents: High aseptic properties Low dead space Best Cleanability (CIP, SIP or COP) LESER´s Clean Service Safety Valves • are designed and manufactured to highest standards and fulfil hygienic and sanitary requirements acc. to DIN 11866 (European Hygienic Pipes Standard) ASME BPE (Bioprocessing Equipment – 2002, a-2003, a-2004) • EN 1672-2 • DIN ISO 14159 • USP class VI and FDA 21 CFR • • • • • • serve for protection of processes and equipment in the foodstuff and pharmaceutical industry. have...

General General Information Applications and References General Design Features LESER´s Clean Service Safety Valves represent the ultimate solution for all critical clean service areas of LESER´s Clean Service Safety Valves offer a large variety of types, materials and options to suit any application: • Food Scope of design • alve sizes d0 10 mm / 0,394 inch through d0 92 mm / V 3,622 inch • Nine orifice sizes from 0,5 x D through P • aterials: 1.4404 / 316L, 1.4435 / 316L M stainless steel as a standard • Standard soft seat for superior tightness • acked knob, packed lifting lever,...

General HyTight Assembly Cleanability first Cleanability first – this is the guideline for the design of the LESER Clean Service Safety Valves. Series 48X provides an optimum of cleanability. The following design features represent the ultimate solution for all critical clean service applications. HyTight stands for Hygienic and Tightness. HyTight Assembly The aseptic O-ring disc is the “heart” of the series 48X. This unique design provides for the first time a really cleanable in- and outlet of a safety valve: 3 1 The O-ring sealing provides superior tightness. 4 2 The elastomer bellows...

General Surface Quality The European Hygienic Engineering & Design Group (EHEDG) and the European Hygienic Pipes Standard DIN 11866 as well as the of ASME BPE 2002, -a- 2003, -a- 2004 provide guidances on the hygienic engineering aspects of manufacturing of safe and wholesome food. SD-3.1.1: – All surfaces shall be cleanable. – urface imperfections S (e. g., crevices, gouges, obvious pits, etc.) shall be eliminated when ever feasible. The surface quality, especially area in contact with product, greatly influences the cleanability of the safety valve. To ensure that the European as well as...

General LESER Surface Definition Clean Service Safety Valves 5 6 3 4 2 1 Surface definition Area Description Surface definition acc. to ASME BPE 2002 · urface permanently in S contact with the product · Design acc. to Part SD · Surface finish in compliance table SF-5 · ifferent surface designation level D acc. to table SF-6 is available S · urface not permanently in contact with the product · uring blow off surface is wetted with D the product · his product cannot flow back to the T process, if the outlet is not connected with the production process S · urface finish preponderant in...

General LESER Surface Packages In order to cover international surface requirements like DIN 11866 as well as ASME BPE, LESER defines surface packages (Clean finish, HyClean finish, Sterile finish) and surface grades (M1 – M6 mechanically polished, ME1 – ME6 mechanically polished and electropolished). LESER surface grade Depending on the manufacturing technology the LESER surface grade differentiates between mechanically polished and mechanically polished and electropolished. Following tables show the comparison of LESER surface grade, hygiene class recording to DIN 11866 and surface...

General Clamp and threaded connections Overview LESER is able to deliver a wide range of connections required for clean service applications. For ordering the right connection please specify inlet and outlet by LESER option code. If the option code is not stated in this table please refer to connection pages of each Type. Overview Clamp connection Clamp connection Clamp connection Clamp connection Threaded connection Threaded connection BO SO CO DO XG XN According to ASME BPE DIN 32676 ISO 2852 ISO 2852 DIN ISO 228 ASME B 1.20.1 Pipe standard BS 4825-1 DIN 11850 ISO 2037 DIN EN ISO 1127 G...