SAFETY DEVICES FOR REFRIGERATING SYSTEMS
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SAFETY DEVICES FOR REFRIGERATING SYSTEMS FROM QUALITY OUR NATURAL DEVELOPMENT Achieved the goal of fty years working in the industry of Refrigeration and Air Conditioning, Castel Quality Range of Products is well known and highly appreciated all over the world. Quality is the main issue of our Company and it has a special priority, in every step, all along the production cycle. UNI EN ISO 9001:2008, issued by ICIM, certies the Quality System of the Factory. Moreover Castel Products count a number of certications in conformity with EEC Directives and with European and American Quality Approval. We produce on high tech machinery and updated automatic production lines, operating in conformity with the safety and environment standards currently enforced. Castel oers to the Refrigeration and Air Conditioning Market and to the Manufacturers fully tested products suitable with HCFC and HFC Refrigerants currently used in the Refrigeration & Air Conditioning Industry. Safety devices 1

Safety devices

INDEX SAFETY VALVES 3030 SAFETY VALVES 3060 PAG 18 FUSIBLE PLUGS All the products illustrated in this Handbook, if submitted to hydrostatic test, guarantee a pressure strength at least equal to 1,43 x PS in compliance with the Directive 97/23/EC. All the products illustrated in this Handbook, if submitted to burst test, guarantee a pressure strength at least equal to 3 x PS according to EN 378-2 : 2008 Standard. PAG 17 BURSTING DISC SAFETY DEVICES 3070 PRESSURE CONTAINMENT PAG 15 SAFETY VALVES UNIONS “During the test, no bubbles shall form over a period of at least one minute when the...

SAFETY VALVES 3030 For this reason, during relief, a gas leak occurs through this orice. Utilized material: EN 12420-CW617N brass. Disc: obtained through bar machining and equipped with gasket, it ensures the required sealing degree on the valve seat. e gasket is made in P.T.F.E. (Polytetrauorethylene), a material that, during valve estimated service life, maintains a good strength and does not cause the disc to stick on the seat. e disc is properly guided in the body and the guide action can never fail; there are no glands or retaining rings that hamper the movement thereof. Utilized...

SCOPE Use: protection against possible overpressures of the apparatuses listed below, with regard to the operating conditions for which they have been designed: - Refrigerating system and heat pump components, for instance: condensers, liquid receivers, evaporators, liquid accumulators, positive displacement compressor discharge, heat exchangers, oil separators, piping. (reference: EN 378-2:2008 Standard) - Simple pressure vessels (reference: 87/404/ EEC Directive) Fluids: the valves can be used with: - Refrigerant uids, in the physical state of gas or vapour, belonging to Group 2 according...

Refrigerant Function of Isentropic Coefcient C Isentropic Coefcient k R22 1,17 2,54 R134a 1,12 2,50 R404A 1,12 2,50 R407C 1,14 2,51 R410A 1,17 2,54 R507 1,10 2,48 Calculation of minimum required discharge capacity of safety valve is closely linked to the type of system where the valve is installed, with the causes that may arouse the opening of safety valve, i.e.: - External heat sources. e minimum required discharge capacity shall be determined by the following: Q md 3600 A surf h vap [Kg/h] with: - = density of heat ow rate, it’s assumed to be 10 [kW/m2] - Asurf = external surface area of...

Vc D2 L 4 [m3] with: - D = rotor diameter [m] - L = rotor length [m] ØD H2 TABLE 2: Dimensions and Weights of valves 3030 Weight [g] Dimensions [mm] Catalogue Number H1 H2 H3 28 44 115 159 38 38 28 44 115 159 780 50 56 40 58 158 216 1960 780 VALVE INSTALLATION H1 Ch L Sizing of minimum ow area of the safety valve A c 3,469 Q md vo C 0,9 K d po 4260 0,0104 154 2,51 0,9 0,83 27,25 [mm2] with: - C = 2,51, corresponding to isentropic exponent k for R407C equal to 1,14, according to table A1 of EN 13136:2001/A1:2005 Standard - Kd = 0,83, certied coecient of discharge for safety valve 3030/88 -...

Pressure loss in the upstream line Pressure loss in the downstream line Calculation of pressure loss is given by: Calculation of pressure loss is given by: 2 2 A p in 0,032 c C K dr po A in A p 1 0,064 c C K dr p o p 2 2 A out with: - Ac = minimum calculated ow area [mm2] - Ain = inside area of inlet tube to valve [mm2] - Kdr = Kd x 0,9, derated coecient of discharge - C = function of isentropic coecient k - = addition of pressure loss coecients n of any component and piping e coecients n are relevant to: - pipe elements loss, as connections and bends - valves loss - loss along the pipe and...

SAFETY VALVES 3060 GENERAL DESCRIPTION Valves series 3060 are safety devices according to the denition given in Article 1, Point 2.1.3, 2nd dash of 97/23/EC Directive and are the subject of Article 3, Point 1.4 of aforesaid Directive. e valves above mentioned are standard type, unbalanced, direct-loaded safety valves. Valve opening is produced by the thrust the uid under pressure exerts on the disc, when said thrust exceeds, under setting conditions, the opposing force of the spring acting on the disc. Valves are identied by means of: - a model number formed of an alphanumerical coding that...

nut that is housed into the brass body and is xed in this seat with an edge calking operation. SCOPE Use: protection against possible overpressures of the apparatuses listed below, with regard to the operating conditions for which they have been designed: - Refrigerating system and heat pump components, for instance: condensers, liquid receivers, evaporators, liquid accumulators, positive displacement compressor discharge, heat exchangers, oil separators, piping. (reference: EN 378-2:2008 Standard) - Simple pressure vessels (reference: 87/404/ EEC Directive) Fluids: the valves can be used...

refer to the specic product and sector standards. EN ISO 4126-1: 2004 Standard: “Safety devices for protection against excessive pressure – Part 1: Safety valves”, harmonized with 97/23/EC Directive, species general requirements for safety valves irrespective of the uid for which they are designed. EN 378-2 : 2008 Standard “Refrigerating systems and heat pumps – safety and environmental requirements – Part 2: Design, construction, testing, marking and documentation”, harmonized with 97/23/EC Directive, provides a general outline of the protection devices to be adopted in refrigerating...