Atmósferas Explosivas en sistemas de Refrigeración Industria

Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) ATEX 94/9/EC Directive[ATmosphères EXplosives] REFRIGERATION & AIR CONDITIONING DIVISION Application Guide Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Contents Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Application area for ATEX and Harmonised Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Scope of ATEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Non-electrically equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Intrinsic safety protection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Encapsulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Other requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 General zone classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Zone classification principle of a refrigeration system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Guideline – zone classification of refrigeration systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Zone classification, general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Zone classification for refrigeration systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Equipment group and zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Requirements for refrigeration components in countries outside Europe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 USA & Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Other countries (China, Japan, Brazil, …..) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Danfoss solenoid coils, pressure controls and gas detectors suitable for use in installations located in potentially explosive atmospheres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Manufacturer’s declaration for potentially explosive atmosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Declaration of conformity in accordance with ATEX 94/9 EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Annex I: Gas Groups and Temperature Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Protection methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Annex II: Classification of Danfoss Industrial Refrigeration products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Annex III: Valves for HC-refrigerants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Annex IV: Technical data for ICS3E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Technical data for PMFHE or PMFLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Technical data for SV3E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Technical data for CVP-HPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Technical data for CVCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Technical data for EVME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2 DKRCI.PA.000.A2.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA), 10 - 2007 Danfoss has over a number of years supplied components to this business area. due to new. Other relevant directives for refrigeration equipment are PED-Pressure Equipment Directive. The ATEX directive does not state requirements for: Operation – When the equipment is operating at the end-users facility. whereas ATEX includes both electrical and non-electrical equipment. and only equipment fulfiling the requirements must be CE marked and “placed on the market”. Important! . Application area for ATEX and Harmonised Standards The ATEX as well as the harmonised technical standards state requirements for: Design of equipment / manufacture of equipment / testing of equipment Compliance with the ATEX directive ensures free movement of goods / equipment between all EU-member states and it also ensures that the equipment can be put into service. PRS systems (Process Refrigeration Systems) are typically classified as hazardous areas. where locations are classified as hazardous areas.PA.2007 DKRCI. EMC Electro Magnetic Compatibility. Fig.02 / 520H1296 3 .EC directives ATEX is just one of a number of EC directives refrigeration equipment manufacturers have to comply with. The ATEX directive became mandatory from 1st July 2003 in all EU and EFTA member states. 2 . However. before their equipment can be “placed on the market” in the member states. 10 . 1 . 3 . particularly in Europe. The ATEX directive specifies the requirements for equipment intended for use in potentially explosive atmospheres. The ATEX directive replaces the previous EC directive 76/117/EC which only included electrical equipment. Installation and start up. The Directives are “law” in the member states. but some components are used in related applications. MDMachinery Directive and LVD-Low Voltage Directive. if there are no particular requirements for the country of destination. ATEX is derived from the French term “ATmosphères EXplosives”. national laws become effective. as specified in the ATEX directive. the system must not be used.EU and EFTA Member states PED Pressure Equipment Directive ATEX Potentially explosive atmosphere EMC Electro Magnetic Compatibility LVD Low Voltage Directive MD Machinery Directive Fig.The zone classification for the country of destination of a final refrigeration system has to be approved by local authorities. refrigeration components and refrigeration systems have to fulfil requirements for potentially explosive atmospheres. The ATEX 94/9/EC directive is one of the “new” European directives.A2.ATEX categories / degree of protection © Danfoss A/S (RA Marketing/MWA).Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Introduction Industrial refrigeration components are mainly used in ammonia refrigeration systems. If local authorities require higher classification than the actual equipment is approved for.000. Degree of protection Very High Protection Two independent protection measures or safe if two errors occur independently Safe in normal operation and in anticipated case of commonly occurring errors Safe in normal operation Category Category 1 High Category 2 Normal Category 3 Fig. where the ATEX requirements also have to be fulfilled. more restrictive regulations. Tankers and mobile offshore units. Within the refrigeration system. 5 . These products have to fulfil all requirements in the ATEX directive. devices.…. and have to be marked with the required marking. Simple mechanical components like valves. Security control and regulation devices intended for use outside explosive areas but which secure the equipment in the hazardous areas . Equipment for mining industries and explosive atmospheres caused by dust are not covered in this application guide. Equipment and protection systems for use in connection with explosive or unstable chemicals. Electrical and non-electrical equipment. Removing one of the elements eliminates all risk of explosion. Components (parts without any independent function).A2. Equipment (machines.The explosion triangle © Danfoss A/S (RA Marketing/MWA). and have to fulfil all requirements in the ATEX directive. to prove that the equipment do not have an ignition source. Means of transport except vehicles. built-in instruments or mobile devices).02 / 520H1296 Fig. Electrically operated components are covered by the ATEX-directive.VIII in figure 4. In refrigeration. filters. must nevertheless carry out and keep a Non electrical valve without potential ignition source Not included in the ATEX Directive: Medical equipment for hospital environments. and have to be marked with the required marking. Manufacturers of this kind of equipment. Security systems (equipment which can stop / limit explosions). 4 DKRCI. II. components containing non conductive materials. etc. All three elements must be present before an explosion can take place. do normally not contain any potential ignition source. classified as: Equipment Group II.2007 . Household appliances and equipment intended for use in non-commercial surroundings. check valves. Non electrical valve with potential ignition source Electrical operated valve Zone Zone Zone – Stop valves – Filters – Check valves – Etc. and are safe for the purpose. Personal Protection Equipment directive 89/686/EC. consequently there is no risk of explosion. Non-mining equipment for potential explosive atmospheres. Mechanical components with potential ignition sources e. – Not relevant for common industrial refrigeration components CE-Type approval III + IV or V – Electronic components – Solenoid coils – Etc. Explosion triangle The explosion triangle (fig. specify the relevant ATEX 94/9/EC directive “modules” that need to be complied with. the consideration regarding the risk of explosion is limited to the outside of the system itself.ATEX-requirements Not covered by the scope of ATEX Directive 94/9/CE Documentation at Notified Body (VIII partly) Internal quality control (VIII) NOTE: The letters I. CE-Type approval III + IV or V CE-Type approval III + IV or VII Internal quality control (VIII) Category 1 (Zone 0) (Zone 1) (Zone 2) Category 2 Category 3 Fig.g.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Scope of ATEX Included in the ATEX Directive: Mining and non-mining equipment.PA. – Category 1 – Category 2 – Category 3 The requirements in the categories depend on the type of equipment.000. 5) shows the principle of explosion. Explosive atmospheres caused by gas and dust. risk assessment report. and are therefore not covered by the ATEX-directive. there is 100% concentrated refrigerant with no oxygen present. are covered by the ATEX-directive. 10 . 4 . The requirements specified in the ATEX directive are almost identical with the previous legislation and are much more demanding than the requirements for non-electrical equipment. Due to power consumption restrictions. © Danfoss A/S (RA Marketing/MWA). EN 13463-1 Non-electrical equipment for potentially explosive atmospheres. without the above mentioned ignition sources. Explosion prevention and protection. Part 1. A number of different methods can be used to protect electrical equipment. Further methods are described in Annex I. EN 13463-6 Non-electrical equipment for potentially explosive atmospheres. This method is often used for components with“higher” power consumption e. All possible sources of ignition have to be analysed and avoided. Protection by control of ignition. Part 6. power consumption is also a limiting factor with this method due to the risk of “high” surface temperature of the component.A2. 10 . 6 .2007 Note: Solenoid valves with these coils can have relatively low MOPD. Detailed below are two commonly used methods of electrical protection.PA. The requirements for this kind of equipment are specified in: EN 1127-1 Explosive atmospheres. Basic concepts and methodology. Part 1. Simple components like stop valves. plastic) are not acceptable.000. The risk analysis of non-electrical refrigeration equipment (valves and similar components) has to focus on ignition sources. solenoid coils. are normally not covered within the scope of the ATEX directive.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Non-electrical equipment The requirements for non-electrically equipment in hazardous areas are new. Intrinsic safety protection method Intrinsic safety is an explosion protection technique ensuring there is insufficient energy to cause the ignition of a surrounding explosive atmosphere by an electrical spark or the heating of components or circuitry.g. However. Examples: Non-conductive materials (e.g. Electrical equipment The requirements for electrical equipment in hazardous areas are not new.5%.Intrinsic safety protection method Encapsulation Encapsulation is an explosion protection technique where the electrical components are fully encapsulated. Basic methods and requirements. this method is only suitable for equipment with low power consumption and is commonly used for measuring devices.02 / 520H1296 5 . Hot surfaces. Non-conductive material can create “static electricity”. DKRCI. filters etc. Category 2: Magnesium content must be less than 7. EX-zone Non EX-zone Fig. is not covered within the scope of the ATEX directive.A2. In PRS systems flammable refrigerants like propylene are often used. but not necessarily for external sealings. and the actual type of sealing.2007 .Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Marking Components covered within the scope of the ATEX directive have to be CE-marked. ammonia it has many different material compatibility issues.sign. 15 yes ATEX EC ATEX94/9 94/9 EC applies applies Declaration Declaration ofof conformity inin conformity accordance withATEX accordance with ATEX 94/9 EC 94/9 EC See fig. 8 . Use in Use in Explosive Explosive atmosphere atmosphere no ATEX requirements requirements NoNo ATEX yes Manufacturer’s risk Manufacturer’s risk assessment assessment Manufacture's Manufacture’s declaration for declaration for potentially explosive potentially explosive atmosphere atmosphere Potential Potential ignition source ignition source no See fig. All components covered within the scope of the ATEX directive must be supplied with a CE declaration of conformity. this is an important issue. Refrigerant (flammable) Propane Butane Iso-butane Propylene Ethane Neoprene / CR (cloroprene) Used for standard refrigeration valves fair satisfactory fair unsatisfactory fair It is therefore very important that material compatibility is also evaluated. 10 . is normally suitable for all internal sealings. The manufacturer also has the obligation to document a safety risk assessment for the equipment.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). It is important to make sure that specific products are approved for the actual refrigerant.PA. Non-electrical equipment without any ignition source. When propylene is compared to e. An O-ring with a judgement “fair”.Documentation Other requirements The ATEX directive does not differentiate between different refrigerant types and for manufacturers of refrigerant valves. but has to be supplied with the manufacturer’s declaration. and that it does not have any ignition sources.000. The manufacturer’s declaration must declare that the equipment is suitable for the purpose.Material compatibility (sealing material / O-rings) 1 ) There are no FPM O-rings available for low temperature (below –40°C) 6 DKRCI. 7 -marking Protection type: o for oil immersion p for pressurisation q for powder filling d for flameproof enclosure e for increased safety ia for intrinsic safety ib for intrinsic safety m for encapsulation Gas Group: IIA IIB IIC Temperature class: T1 to T6 Documentation The required documentation depends on whether the component has an ignition source or not. The suitability of O-rings with the different refrigerant types depends on the compatibility judgement. 16 Fig. Refrigeration valves are normally designed for use with specific refrigerant types or groups of refrigerants. The marking depends on the actual type of equipment. Nitrile / NBR satisfactory satisfactory satisfactory doubtful satisfactory Flourcarbon FPM (Viton) 1) satisfactory satisfactory satisfactory satisfactory satisfactory Fig.g. 9999 Specific marking II 2 G Additional marking EEX d IIC T4 CE-marking & registration number of Notified Body Equipment group: I Mining II Non-mining Equipment Category: 1 (zone 0) 2 (zone 1) 3 (zone 2) Nature of atmosphere: G Gas D Dust Fig. 9 . and marked with the specific . Certain local authorities interpret the requirements so that equipment located in a machinery room for a HC refrigeration system is classified as Zone 2 if only one compressor is employed. – The system is maintained correctly. Requirements for ammonia are specifically mentioned in EN 378-2 (for information also see prEN 378-2). Industrial refrigeration systems with HC refrigerants (e. changing oil). zone 1. No requirements Low risk Zone 2 - Zone 1 - Zone 0 High risk Compressor Condenser Evaporator Fig. It is also important to acknowledge that local authorities have to approve the specified zone classification of the final equipment. “Potentially explosive atmospheres” can occur outside a refrigeration system (in the location of a refrigeration system). Refrigeration systems located in hazardous areas (e. If two compressors are present.2007 DKRCI. Propylene. Hazardous areas are classified in Zones.approved equipment can be installed in hazardous areas zone 1. HCFC.g. (Refrigeration systems designed and maintained according to EN 378 fulfil this requirement). Category 2 . zone 2 and outside zone categorised areas. There is no standard available.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) General zone classification Components for use in hazardous areas are classified from Category 1 to Category 3.g. – The correct equipment is being used e.Zone-classification principle for a refrigeration system Equipment group and zones Equipment located in zone specified areas must fulfil the following requirements: No requirements Hazards area Zone 2 Zone 1 Zone 0 Category 3 . special consideration should be given to: – The tightness of the system. Propane. 1 or 0. Valves and similar equipment in refrigeration systems located in hazardous areas classified for zone 2. and one of these is under service (e. “Potentially explosive atmospheres” do not occur inside a refrigeration system because no oxygen is present.02 / 520H1296 7 . 10 . etc) are “normally” classified as hazardous areas. for different part of the system.g. HFC. Butane. Refrigeration systems in “Potentially explosive atmospheres” can contain flammable or nonflammable refrigerants. The zone classification of final equipment is very important. Zone classification for refrigeration systems Refrigeration systems are classified in relevant zones according to the risk for the location for a particular refrigerant system. Zone 2 Zone 2 Zone 0 Zone 0 Zone 1 Zone 1 Zone Zone 0 0 Zone classification.Zone-classification principle Guideline – zone classification of refrigeration systems Locations for “standard “refrigeration systems with CFC. 10 . in petro chemical plants) have to fulfil requirements for “Potentially explosive atmospheres” irrespective of the refrigerant. zone 0 and outside zone categorised areas. ATEX Directive Catagory 3 Equipment Catagory group II 2 Catagory 1 Fig. Ammonia are “normally” not classified as hazardous areas. where an exact definition of zones are made.g. have to fulfil the requirements in ATEX directive (Directive 94/9/EC). general Fig.000. Category 1 . Zone 0 is the most restrictive and Zones 1 and 2 are less restrictive. For refrigerant systems with flammable refrigerants. 12 . sealing materials must be compatible with the refrigerant.A2. then it becomes Zone 1. A particular refrigeration system can be classified in different zones.approved equipment can be installed in hazardous areas zone 2.approved equipment can be installed in hazardous areas zone 2 and outside zone categorised areas. 11 .Category relations © Danfoss A/S (RA Marketing/MWA).PA. depending of actual division and product type.. and the requirements are different (e. Safe in normal operation. Division 1 or 2. 10 . Europe USA & Canada Zone 0 Division 1 Zone 1 High Normal Zone 2 Division 2 8 DKRCI.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Requirements for refrigeration components in countries outside Europe USA & Canada Mechanical components without any electrical equipment generally do not need to be approved.2007 . Definition Areas in which a gas/ oxygen mixture occurs CONTINUOUSLY or for extended periods. the complete valve assembly has to be approved. Brazil.) In particular electrical equipment has to be type approved in several countries.g.g. …. Electrical components have to be approved according to UL. 13 . Japan. Degree of protection Very High Protection Two independent protection measures or safe if two errors occur independently. a valve. When the electrical equipment is mounted on e.PA.000.Hazardous areas Europe / USA Other countries (China. Safe in normal operation and in anticipated case of commonly occuring errors. Approval cost is generally relatively high for these products. only available in local language). Areas in which a gas/ oxygen mixture occurs OCCASIONALLY. Fig.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA).A2. Areas in which a gas/ oxygen mixture occurs EXCEPTIONALLY and only for short periods. Must be used with reliable means of limiting the voltage and current to prevent sparks between the contact surfaces.: DKACV. o Stainless steel bellow with restricted movement. Grade of enclosure: IP 67. Grade of enclosure: IP 30 or IP 40 l Max working pressure: KP 1E: PS = 8 bar.PA. Grade of enclosure: IP 67.: RD5CB Pressure Control type KPE II 3 G EEx nL IIC T6 The pressure controls are suitable for use in installations located in potentially explosive atmospheres. NOTE 1: The coil has reduced MOPD (MOPD~8 bar depending of actual valve type). l 16 W dc. 10 . Grade of enclosure: IP 20. This could be zener diodes or Ex barriers.A Solenoid coils type “refrigeration” II 3 G EEx nA II T3 The coils are suitable for use in installations located in potentially explosive atmospheres.600. NOTE: Contact loads . o Stainless steel bellow with restricted movement.20 W dc & ac NOTE: The supply must be secured against a too high power consumption in case of a short circuit. o Soldering connection. Literature No. l Supplied with 1 m moulded-in 3-core cable or terminal.02 / 520H1296 9 . NOTE: Contact loads .A2. pressure controls and gas detectors suitable for use in installations located in potentially explosive atmospheres Solenoid coils type BP II 2 G EEx m II T4 The coils are suitable for use in installations located in potentially explosive atmospheres.2007 DKRCI.PD. Literature No. l l Category 3 – Zone 2 ATEX Category 3 (Zone 2). l l Category 3 – Zone 2 ATEX Category 3 (Zone 2). l ATEX design o Gold contactors. o Soldering connection. l ATEX design o Gold contactors.: RD5AC © Danfoss A/S (RA Marketing/MWA). l Max working pressure PS = 17 bar. Literature No. This could be zener diodes or Ex barriers. l Supplied with 3 m moulded-in 3-core cable. l l Category 3 – Zone 2 ATEX Category 3 (Zone 2).Must be used with reliable means of limiting the voltage and current to prevent sparks between the contact surfaces. Literature No. l l Category 2 – Zone1 ATEX Category 2 (Zone 1). KP 7E: PS = 32 bar.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Danfoss solenoid coils. NOTE 2: The supply must be secured against a too high power consumption in case of a short circuit.000. 1.: RD3JE Pressure Control type MP 55E II 3 G EEx nL IIC T6 The differential pressure controls are suitable for use in installations located in potentially explosive atmospheres. l l l l l l Category 2 – Zone 1 ATEX design ATEX Category 2 (Zone 1) Grade of enclosure IP 67 Gold contactors Stainless steel bellow with restricted movement Stainless steel frame (conductive) NOTE: Contact loads .Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Danfoss solenoid coils. 14 10 DKRCI.PD.2007 . l Measuring range 0 .pressure and temperature controls II 2 G EEx ia IIC T6 The RT. Literature No.A2.: DKACT.P20y1.: RD5BA Accessories for Potentially Explosive Atmospheres l l LED indication power supply Safety barriers.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). l l Category 2 – Zone 1 ATEX Category 2 (Zone 1).000. Grade of enclosure: IP 65.pressure and temperature controls are suitable for use in installations located in potentially explosive atmospheres. I.: DKACT.P20. 10 . transmitter supply unit Safety barriers and I.PD.(see DKACT.PA. Literature No. This could be zener diodes or Ex barriers. Literature No. pressure controls and gas detectors suitable for use in installations located in potentially explosive atmospheres (continued) Pressure Transmitter Type MBS 4201 II 1 G EEx ia IIC T4 – T6 The pressure transmitters are suitable for use in installations located in potentially explosive atmospheres.: RD7HA RT.S Isolator. NOTE: Must be used in conjunction with safety barriers . NOTE: Literature No. Grade of enclosure: IP 65 / IP67.S Isolator.Must be used with reliable means of limiting the voltage and current to prevent sparks between the contact surfaces. l l Category 1 – Zone 0 ATEX Category 1 (Zone 0).PD.W Gas detector type GD II 2 G EEx d IIB + H2 T3 –T6 The gas detectors are suitable for use in installations located in potentially explosive atmospheres.P20.Y LED indication open-circuit/ short-circuit Fig.600 bar.02). have no ignition sources ICS 3E PMFLE CVP-HPE EVME Manufacturer’s Declaration Main Valves (control valves) Modulating liquid level regulators Pilots for ICS Valves Pilots for ICS Valves For the above listed valves a hazard analysis to the directive ATEX 94/9/EC has been carried out with the following result: This non-electrical equipment holds no potential ignition source at normal usage.A2. Butane. Our products comply with the requirements of the Pressure Equipment Directive 97/23/EC and are approved by TÜV Nord (0045) Fig. Iso-butane and Propylene) and . 15 Declaration of conformity in accordance with ATEX 94/9 EC Fig.PA. The valves are equipped with special o-rings compatible with the specified refrigerants. Note 1: Valves used for the above condition has to installed and maintained according to the requirements in EN 378. The valves my be used in the following EX range: Category 2 (Zone 1) and Category 3 (Zone 2) IMPORTANT: The above-mentioned valves are not identically to standard refrigeration valves. The valves have a reduced temperature range.000. 10 .02 / 520H1296 11 . The listed valves are not covered by the scope of ATEX Directive 94/9/EC. has to undergo a separate conformity assessment.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Manufacturer’s declaration for potentially explosive atmospheres Group D to the European Directive ATEX 94/9/CE Component with special sealing material for HC-refrigerants ( Propane. 16 © Danfoss A/S (RA Marketing/MWA).can be mounted with electrically pilots / equipment and . Note 2: Electronic / Mechanical actuators / pilots used to operate the above-mentioned equipment. Reference to standards and directives: EN 13453-1 EN 13453-5 EN 378 ATEX 94/9/EC 14/04/2005 Danfoss Industrial Refrigeration A/S Danfoss Industrial Refrigeration has a quality and environmental management system that is certified in accordance with international standards ISO 9001 and ISO 14001.2007 DKRCI. g. This temperature defines the Temperature Class. allowable surface temperature of 300°C (Temperature Class T2).g. defines the highest allowable surface temperature . lighting. 10 .A2.g.PA.000. Protection methods Technique Protection type Ex Symbol EN Standard EN50 016 Typical application Overpressure p Control rooms Lowered in oil Separation Powder filling o EN50 015 Analysis q EN50 017 Instumentation Encapsulaiton Refined mechanical design Energy limitation m EN50 028 Instrumentation solenoid coils e. Equipment used with Butane must have a max.440 Acetylene (C2H2) 305 Carbon bisulphide (CS2) 102 Hydrogen (H2) 560 Gas T1 × × × × × × × × Temperature Class T2 T3 T4 T5 T6 A II × × × × × × × × × × × × 450 300 200 135 100 85 B C Max. junction boxes Instrumentation e. Engines. this means that equipment with Temperature Class T2 to T6 can be used. MBS Pressure Transmitters Engines / pumps Increased safety e EN50 019 Intrinsic safety ia ib EN50 020 Encapsulation Explosionflameproof d EN50 018 Special Special s General requirements for all methods 12 DKRCI.02 / 520H1296 EN50 014 © Danfoss A/S (RA Marketing/MWA).2007 . [°C] The ignition temperature of a fluid is the lowest temperature at which the fluid / vapour will be ignited.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Annex I Gas Groups and Temperature Classes Gas Group Ignition temperature [°C] Acetone 540 Acetic acid 485 Ammonia 630 Ethane 515 Methylene chloride 556 Methane (CH4) 595 Carbon monoxide 605 Propane 470 n-Butane 365 n-Butyl 370 Hydrogen sulfide 270 n-Hexane 240 Acetaldehyde 140 Ethyl ether 170 Ethyl nitrite 90 Ethylene 425 Ethyl oxide 429 . The Temperature Class. E. allowed equipment surface temp. have no ignition sources Stop Valves SVA-HS. Ex II 3 G EEx nA II T3 X X X X Gas detector GD.: RD5AC103 Literature No.: RD5CB102 Literature No. Butane. CVPP X X X Safety Valves SFA X X X Safety Valves SFV X X X Safety Valves BSV X X X Change Over Valves for Safety Valves DSV X X X Safety Valves POV X X X Components which can be used with Ammonia.W1.ATEX requirements Group Hazardous area ATEX Equipment group II Component type A B C D E F Components which can be used with all refrigerants and .: RD5AC103 Literature No. CFC. Propylene. if any coils are used Main Valves (control valves) ICS3E X X X Modulating liquid level regulators PMFHE X X X Pilots for ICS Valves CVP-HPE X X X Pilots for ICS Valves CVCE X X X Pilots for ICS Valves EVME X X X Components not to be used in hazardous areas Components in this group has an ignition source Motor Valves ICM. X1 X X X X X X Filters FIA X X X X X X Check Valves NRVS X X X X X X Check Valves NRVA X X X X X X Components which can be used with Ammonia. Ex II 1 G EEx ia II T4 . EKC 3. HCFC. if any coils are used Main Valves (control valves) ICS 1 ICS 3 X X X Main Valves (control valves) PM1 PM3 PML PMLX X X X Modulating liquid level regulators PMFH X X X Pilots for ICS Valves EVM X X X Electrically operated expansion valve AKVA X X X Solenoid Valves EVRS X X X Solenoid Valves EVRA X X X Components with special sealing material for use with HC-refrigerants (Probane. ICAD 600/900 Motor Valves MRV / MEV Level controls 38E. AKS 38. Ex II 3 G EEx nL IIC T6 X X MP 55E-Differential pressure control MP 55E.PA.cannot be mounted with any electrically pilots / equipment and .can be mounted with electrically pilots / equipment and . Butane. “Standard” solenoid coils all Pilots CVQ.cannot be mounted with any electrically pilots / equipment and .CO2) Iso-butane.PD. CO2.can be mounted with electrically pilots / equipment and ...A2. HFC. CO2. (Propane.have no ignition sources Note: Only EX approved coils..02 Literature No.03 Literature No. Ex II 3 G EEx nL IIC T6 X X MBS Pressure transmitter MBS 42xx.: DKACV. CFC. AKS 41/41U Electronic regulators EKC 2. HFC refrigerants and .02 / 520H1296 13 . Ex II 2 G EEx d IIB + H2 T3 –T6 X X X X X X - Category 1 Zone 0 Literature No.HCFC.have no ignition sources Note: Only EX approved coils.T6 X X X X X X X X EX solenoid coils BP. HCFC. ethane) Category 3 Zone 2 Category 2 Zone 1 Category 1 Zone 0 Category 3 Zone 2 Category 2 Zone 1 Outside catagory / zone Outside catagory / zone Product groups .: DKACT.A4. CFC.2007 DKRCI.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Classification of Danfoss Industrial Refrigeration products Annex II “Non-flammable” Flammable refrigerants Comments refrigerants (Ammonia. CVPM Electrical components for use in hazardous areas RT-Safety pressure control RTE X X X X X X RT-Differential pressure control RTE X X X X X X RT-Thermostats RTE X X X X X X KPE-Safety pressure control KPE. Iso-butane and Propylene) and .000.600.: RD5AC103 © Danfoss A/S (RA Marketing/MWA).have no ignition sources Stop Valves SVA-ST X X X Regulating Valves REG X X X Stop Check Valves SCA X X X Check Valves CHV X X X Float Valves HFI X X X Float Valves SV X X X Pilots for ICS Valves CVP.PD. HFC refrigerants and .P20. Ex II 2 G EEx m II T4 X X X X X X EX solenoid coils “ “. 10 . 027B0083 027B0084 027B0085 Code no. 027B0086 Code no. 027F4038 027F4039 027F4040 027F4041 027F4042 027F4043 027F4044 027F4045 027F4046 027F4047 Code no. 10 .02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). 032F8029 Annex III PMFLE Low pressure float valve PMFLE 80-1 PMFLE 80-2 PMFLE 80-3 PMFLE 80-4 PMFLE 80-5 PMFLE 80-6 PMFLE 80-7 PMFLE 125 PMFLE 200 PMFLE 300 Code no.2007 .000. 027B0081 Code no.45 to 7 bar EVME Solenoid pilot EVME Code no. 027H1060 027H1061 027H1062 027H1063 027H1064 027H2175 027H2176 027H2177 027H2178 027H2179 027H3029 027H4038 027H5037 027H6038 Code no.66 to 7 bar CVCE Pressure control pilot CVCE –0.PA.A2. 027F4048 027F4049 027F4050 027F4051 027F4052 027F4053 027F4054 027F4055 027F4056 027F4057 14 DKRCI.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Valves for HC-refrigerants ICS pilot control ICS3E 20 D-5 ICS3E 20 D-10 ICS3E 20 D-15 ICS3E 20 D-20 ICS3E 20 D-25 ICS3E 25 D-5 ICS3E 25 D-10 ICS3E 25 D-15 ICS3E 25 D-20 ICS3E 25 D-25 ICS3E 32 D ICS3E 40 D ICS3E 50 D ICS3E 65 D PMFHE High pressure float valve PMFHE 80-2 PMFHE 80-3 PMFHE 80-4 PMFHE 80-5 PMFHE 80-6 PMFHE 80-7 PMFHE 125 PMFHE 200 PMFHE 300 PMFHE 500 SV3E Pilot float valve SV3E CVP-HPE Pressure control pilot CVP-HPE 4 to 22 bar CVP-HPE 4 to 28 bar CVP-HPE -0. Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) Annex IV ICS3E valves Are servo operated valves which belong to the ICV (Industrial Control Valve) family. EN 1515-1 Grade B8 A320 A2-70. Material specification Max. Butane. Are special valves which can be used with Hydro Carbon refrigerants. EN 10213-3 G20Mn5QT.g.000.. EN 10213-3 ASTM LCC A352 LCC A352 JIS SCPL1 G5151 SCPL1 G5151 Steel Steel PTFE Steel Steel Steel Fibre. working pressure: 52 bar g (754 psig) O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “ICS3E”. All dimensions and performance data are identical to the standard ICS (Literature no. Propylene.02 / 520H1296 15 . B 1054 * © Danfoss A/S (RA Marketing/MWA).: PD.A2. Propane.) Temperature range: –40/+120°C (–40/+248°F). 1 2 3 A B C D E F 4 5 6 7 8 9 10 Part Body Top cover Function module (assembled) Cylinder Piston Valve plate Spring Cone Intermediate plate Gasket Bolts Plug Gasket Manual operating spindle Plug Gasket O-ring Material Low temperature steel Low temperature steel EN G20Mn5QT. …. non-asbestos Stainless steel Steel Aluminium Steel Steel Aluminium Flourocarbon (Viton) A2-70. 10 . Technical data Refrigerants: Applicable to HC refrigerants (e.A) O-ring* O-ring* O-ring* O-ring* No.2007 DKRCI.PA.HS0. Have three pilot pressure connections. Have one pilot pressure connection.65 Plug Valve spindle Valve seat Valve body Bottom cover Spring Servo piston Cover Trottle cone Gasket between body and bottom cover Bolts for top and bottom cover Gasket Spring Spindle cap Setting / manual operating spindle Pilot connection O-ring Material Non-metal Non-asbestos Stainless steel Steel Steel Steel Teflon [PTFE] Low temperature cast iron (spherical) Low temperature cast iron (spherical) Steel Cast iron Low temperature cast iron (spherical) Steel Non-metal Non-asbestos Stainless steel Non-metal Non-asbestos Steel Steel Steel Steel Flourocarbon (Viton) 9SMn28 1651 9SMn28 1651 9SMn28 1651 A2-70 A2-70 GG-25 EN-GJS-400-18-LT EN-1693 9SMn28 1651 EN-GJS-400-18-LT EN-1693 EN-GJS-400-18-LT EN-1693 A2-70 RSt. Technical data Refrigerants: Applicable to HC refrigerants (e. Butane. 2 3 4 6 10 12 19 20 23 24 30 31 32 34 41 43 53 60 73 Part Gasket between body and flange Bolts for flange Flange PM 5 .. 630 Type 2 R683/9 Type 2 R683/9 Grade 250 Class 40B Type 2 R683/9 1213 SAE J 403 Type 308 Type 2 R683/9 Type 2 R683/9 Type 2 R683/9 1213 SAE J 403 1213 SAE J 403 1213 SAE J 403 * 16 DKRCI.) Material specification Temperature range: –40/+120°C (–40/+248°F). Are special valves which can be used with Hydro Carbon refrigerants. …. 37-2. working pressure: 28 bar g (406 psig) O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “PMFHE” or “PMFLE”. controlled by pilot float valve type SV3E.000.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) PMFHE or PMFLE valves Are modulating servo-controlled main expansion valves. Max. 10025 9SMn28 1651 9SMn28 1651 A2-70 DIN/EN ISO PMFLE ASTM Type 308 Grade C.2007 . 10 .02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). O-ring* O-ring* O-ring* O-ring* PMFHE No. Propylene. Propane.PA. All dimensions and performance data are identical to the standard PMFH or PMFL (Literature no.g. A 283 1213 SAE J 403 1213 SAE J 403 Fe360 B.A2.: RD2CB). Throttle valve Gasket Plug O-ring Pilot connection (spare part) Orifice needle O-ring Screw Gasket Pin Cover Screw Gasket Label Screw Spring washer Sign Material Stainless steel Low temperature.000.2007 DKRCI. Max. in most cases.PA. Are special valves which can be used with Hydro Carbon refrigerants.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) SV3E valves Can be used separately as a modulating liquid level regulator in refrigerating. …. Butane. However. the SV3E is used as a float pilot valve for the main expansion valve type PMFHE.: RD2BB). 10 . No.02 / 520H1296 17 . Propylene. DIN 17440 P285QH. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 25 26 28 Part Float housing Float Split pin Float arm Link Pin Valve housing O-ring Float orifice Manual regulation unit. All dimensions and performance data are identical to the standard SV (Literature no. Propane.A2. EN 10222-4 EN-GJS-400-18-LT EN 1563 A2-70 © Danfoss A/S (RA Marketing/MWA). freezing and air conditioning systems for ammonia or fluorinated refrigerants. steel Stainless steel Steel Stainless steel Steel High density polymer Steel Flourocarbon (Viton) High density polymer Steel Non asbestos Steel Flourocarbon (Viton) Steel Plastic Flourocarbon (Viton) Steel Non asbestos Steel Low temperature. cast iron (spherical) Stainless steel Non asbestos Cardboard Steel Steel Aluminium DIN / EN X5CrNi18-10..g. Technical data Refrigerants: Applicable to HC refrigerants (e. working pressure: 28 bar g (406 psig) O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “SV3E”.) Material specification Temperature range: –40/+120°C (–40/+248°F). Technical data Refrigerants: Applicable to HC refrigerants (e.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) CVP-HPE valves Are constant pressure pilot valves for high pressure applications. 10 ..2007 .HN0.g. A1 A2 1 3 4 10 11 12 13 14 15 17 18 20 21 22 24 28 Part O-ring Seal Protective cap Seal Nut Diaphragm Thrust pad Spring guide Flange Orifice Base Valve body Cover bolt Setting spindle Screw (M6 × 10) Cover gasket Spring Spring Material Flourocarbon (Viton) Non-asbestos Steel Non-asbestos Stainless steel Stainless steel Stainless steel Stainless steel Steel Stainless steel Stainless steel Cast iron Steel Stainless steel Steel Non-asbestos Steel Steel 18 DKRCI. working pressure: 28 bar g (406 psig) Material specification O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “CVP-HPE”.PA. Max. Propylene.: PD. All dimensions and performance data are identical to the standard CVP (Literature no.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). Are special valves which can be used with Hydro Carbon refrigerants. Propane.A).A2.) Temperature range: –40/+120°C (–40/+248°F).000. No. Butane. …. All dimensions and performance data are identical to the standard CVC (Literature no.g.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) CVCE valves Are pressure-operated pilot valves with an external signal connection that can be used to obtain an indication of the system reference pressure.: PD. Propane.000. Propylene.02 / 520H1296 19 . ….A). the reference pressure (17 bar) refers to the low-pressure side of the system.A2.. Are special valves which can be used with Hydro Carbon refrigerants. The maximum working pressure (MWP) refers to the high-pressure side of the valve (28 bar).2007 DKRCI. O-ring* O-ring* No.HN0. Max.PA.) Material specification Temperature range: –40/+120°C (–40/+248°F). 17 43 44 81 82 103 104 105 106 107 108 109 110 111 112 Part Valve body Seal Blanking plug for pressure gauge connection Seal O-ring Banjo fitting O-ring Protective cap O-ring Signal connection Pilot orifice Connector on banjo fitting 103 Diaphragm Spring Setting spindle O-ring Material Stainless steel Aluminium Stainless steel Non-asbestos Flourocarbon (Viton) Steel Flourocarbon (Viton) Steel Cloroprene (Neoprene) Stainless steel Steel Stainless steel Steel Stainless steel Flourocarbon (Viton) * © Danfoss A/S (RA Marketing/MWA). The reference pressure must be connected to the low-pressure side of the system. 10 . Butane. Technical data Refrigerants: Applicable to HC refrigerants (e. working pressure: 28/17 bar (406/247 psig) O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “CVCE”. Propane. working pressure: 42 bar (609 psig). Butane.PA.02 / 520H1296 © Danfoss A/S (RA Marketing/MWA). Are special valves which can be used with Hydro Carbon refrigerants..g.) Temperature range: –40/+120°C (–40/+248°F).A2.2007 . Material specification O-ring material: Fluorocarbon (Viton) compound for low temperature application Marking: The valve is marked with the name “EVME”. suction and hot gas lines applications. Technical data Refrigerants: Applicable to HC refrigerants (e. 10 .: PD. …. All dimensions and performance data are identical to the standard EVM (Literature no.000. 5 No. 2 3 4 5 6 7 10 11 Part Armature Armature tube Seal O-ring Seal Spacing ring Valve body Valve seat Steel Teflon (PTFE) Material Stainless steel Stainless steel Non-asbestos Flourocarbon (Viton) Aluminium 20 DKRCI. Note: Solenoid coils must be EX approved. Max.Application guide Industrial Refrigeration systems in Potentially Explosive Atmospheres (Hazardous area) EVME valves Are pilot solenoid valves suitable for liquid.HN0. Propylene.A).