EN 12505:2000+A1:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stroji za predelavo hrane - Centrifugalni stroji za predelavo jedilnega olja in masti - Varnostne in higienske zahteveNahrungsmittelmaschinen - Zentrifugen zur Verarbeitung von eßbaren Ölen und Fetten - Sicherheits- und HygieneanforderungenMachines pour les produits alimentaires - Centrifugeuses pour le traitement des huiles et des graisses alimentaires - Prescriptions de sécurité et d'hygièneFood processing machinery - Centrifugal machines for processing edible oils and fats - Safety and hygiene requirements67.260Tovarne in oprema za živilsko industrijoPlants and equipment for the food industryICS:Ta slovenski standard je istoveten z:EN 12505:2000+A1:2009SIST EN 12505:2002+A1:2010en,fr01-februar-2010SIST EN 12505:2002+A1:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12505:2000+A1
October 2009 ICS 67.260 Supersedes EN 12505:2000English Version
Food processing machinery - Centrifugal machines for processing edible oils and fats - Safety and hygiene requirements
Machines pour les produits alimentaires - Centrifugeuses pour le traitement des huiles et des graisses alimentaires -Prescriptions de sécurité et d'hygiène
Nahrungsmittelmaschinen - Zentrifugen zur Verarbeitung von eßbaren Ölen und Fetten - Sicherheits- und Hygieneanforderungen This European Standard was approved by CEN on 21 April 2000 and includes Amendment 1 approved by CEN on 23 July 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12505:2000+A1:2009: ESIST EN 12505:2002+A1:2010

Noise test code - Grade 2 of accuracy. 24Annex B (normative)
Principles of design to ensure the hygiene of centrifugal machine for processing edible oils and fats . 28Annex C (informative)
Evaluation and verification method for bowl design and calculation procedure . 30Annex D (informative)
Bibliography . 36Annex ZA (informative)
!!!!Relationship of this European standard and the Essential Requirements of EU Directive 98/37/EC"""" . 37Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 38 SIST EN 12505:2002+A1:2010

!". This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document." According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
It specifies safety and hygiene requirements for the design, manufacture, use, maintenance and cleaning of centrifugal machines. The normal operating methods are described in 3.2. This standard does not apply to machines using solvent extraction and ancillary machines (e.g. conveyors, hoppers, etc.). It is not applicable to basket centrifuges. This European Standard is applicable primarily to machines which are manufactured after the date of approval by CEN. 2 Normative references !The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documents (including any amendments) applies." !deleted text" EN 294:1992, Safety of machinery - Safety distances to prevent danger zones being reached by the upper limbs !EN 614:2006, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles" !deleted text" EN 953:1997, Safety of machinery - General requirements for the design and construction of guards fixed, movable) SIST EN 12505:2002+A1:2010

!EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits for machinery operation"
EN 1037:1995, Safety of machinery - Prevention of unexpected start-up EN 1050:1996, Safety of machinery - Principles of risk assessment !EN 1672-2:2005, Food processing machinery — Basic concepts — Part 2: Hygiene requirements" !EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements" !deleted text" EN 60529:1991, Classification of degree of protection provided by enclosures (code IP) EN ISO 3744:1995, Acoustic - Determination of sound power levels of noise sources – Engineering method employing and enveloping measurement surface in an essentially free field over a reflecting plane EN ISO 4871:1996, Acoustic - Verification and declaration of noise emission values of machinery and equipment
EN ISO 11201:1995, Acoustic - Noise emitted by machinery and equipment - Measure of emission sound pressure levels at the work station and at other specified positions – Engineering method in an essentially free fields over a reflecting plane EN ISO 11688-1, Acoustic - Recommended practice for the design of low noise machinery and equipment, Part 1: Planning !EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003) EN ISO 13849-1:2008, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1:2006) EN ISO 13850:2008, Safety of machinery — Emergency stop — Principles for design (ISO 13850:2006)" !deleted text" ISO 468:1982, Surface roughness - Parameters, their values and general rules for specifying requirements !ISO 1940-1:2003, Mechanical vibration — Balance quality requirements for rotors in a constant (rigid) state — Part 1: Specification and verification of balance tolerances" !deleted text" IEC 60651:1979, Sound level meters and Amendment 1:1993 IEC 60804:1985, Integrating-averaging sound level meters SIST EN 12505:2002+A1:2010

respectively decanter and disc stack centrifuges. 3.2 centrifugal machine it is used for the extraction and separation of edible oils and fats in which, by means of centrifugal force, the incoming product ("feed") is separated into the different liquid and solid phases. 3.2.1 decanter centrifuge it is used to extract the solid phase from the liquid (oil or oil and water) phase (see Figure 1) The feed enters the machine through a fixed pipe (1) and is distributed on the internal surface of the bowl (2), by centrifugal force. The scroll (3), which rotates at a slightly different speed from the bowl, conveys the solid residue to the outlet holes (4). The scraper (5), driven by an electric motor (6) removes the solid residue from the walls of the housing (7).
The normal operating method of this centrifuge is of the continuous feeding and discharging of the processed products. The liquids pass out from the bowl through special weir holes: for oil phase (8) and for water phase (9). An electric motor (10) drives the bowl by a transmission device (11) (e.g.: pulleys, belts and hydraulic clutch). The scroll is rotated by means of a scroll driving device (12) (e.g.: pulleys, belts and gear box). 3.2.2 disc stack centrifuge centrifugal machine with vertical axis. It is used to separate oil from water and small quantity of residual solid (see Figures 2 and 3). The feed enters the machine through a fixed vertical pipe (1). Inside the bowl, under the effect of the centrifugal force, the feed is separated into three layers: residual solid (2), water (3), and oil (4). The feed passes through the discs (5). The liquids pass out from the bowl through weir rings: for oil (6) and for water (7). Oil and water are collected under a fixed bowl cover (8) which acts as a support for the feed pipe (1), and for oil (9) and water (10) outlet pipes. The normal operating method of this centrifuge is of the continuous feeding and discharging of the processed liquid products.
On the self-cleaning disc stack centrifuge (see Figure 2) the residual solid can be discharged by a hydraulic discharging device (11) which permits its ejection, by centrifugal force, whilst the machine is operating. On the manual disc stack centrifuge (see Figure 3) the residual solid can be discharged only when the machine is at rest and after the bowl has been opened. The electric motor (12) drives the bowl by a transmission device (13) (e.g.: a mechanical clutch and gears). SIST EN 12505:2002+A1:2010

Figure 1 — Decanter centrifuge (informative) SIST EN 12505:2002+A1:2010

Figure 2 — Disc stack centrifuge - self cleaning discharge version (informative
Figure 3 — Disc stack centrifuge - manual discharge version (informative 3.3
feed: Material to be processed by the centrifugal machines. 3.4
bowl: Rotating part of hollow and asymmetric shape containing the feed. 3.5
scroll: Helicoidal-shaped rotating part of the decanter centrifuge, situated inside the bowl. 3.6
bowl cover: An element which when closed prevents contact with the working pa
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