series 249

series 249

series 249

Product catalog summary
Specifications: The document details the Series 249 safety valves, highlighting their operational temperature range from -196°C to +300°C. The construction materials include martensitic and austenitic stainless steel for the body and bonnet, with cast iron bonnet options available.
Operating Characteristics: These valves are suitable for both gaseous and liquid applications, with a set pressure range of 0.5 to 500 barg. Discharge coefficients for gaseous and liquid states are specified, with both certified and derated values.
Certifications and Connections: The valves are certified under PED, ATEX, GOST, and RINA standards. They feature standard threaded connections in GAS or NPT, with additional options available upon request.
Performance and Limitations: Overpressure and blowdown characteristics are detailed, including allowable built-up back pressure. For conditions outside specified ranges, consultation with the Technical Department is advised.
Relief Valves: Series 249 valves are also available as relief valves, marked by an 'R' in the model number, sharing the same material and dimensional specifications as the safety valves.
Material Specifications: Detailed specifications are provided for components such as the valve body, disc, ball, guide, spring plate, spindle, spring, pressure adjusting screw, bonnet, and cap.
Flow Rate Tables: Flow rate tables for water, air, and steam at various pressures are included, calculated according to EN 4126-1 standards, with a note that flow rates are subject to verification and adjustment by Besa®.
Graphical Data: Graphs illustrate the trend of the discharge coefficient Kd relative to the backpressure ratio pb/p0 for different valve series.
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Catalog excerpts

series 249-1

Tavola riassuntiva delle principali caratteristiche costruttive e di funzionamento Main fabrication and operating characteristics table 249 pieno boccaglio Cappello chiuso PED-ATEX- Connessioni (molla coperta) GOST-RINA filettate standard GASoNPT (per esecuzioni diverse, fare riferimento all’Ufficio Tecnico) 249 full nozzle Closed PED-ATEX- Std. threaded (covered spring) GOST-RINA connections GAS or NPT (for different executions please refer to Technical Dept.) Main operating characteristics intervallo pressioni di taratura p Corpo e cappello in acciaio inossidabile austenilico da -196 a +300°C * Per temperature e pressioni diverse da quelle riportate nella presente tabella, fare riferimento all’Ufficio Tecnico. Applications Gaseous - liquid (1) do= actual orifice diameter (mm) LEGENDA: p= pressione di taratura (barg); pb= contropressione (barg). LEGENDA: p=set pressure (barg) pb= backpressure (barg) Note (1) Valvole di sicurezza per liquidi solo nella versione con diametro dell’orifizio do=10 mm (DN1/2" e DN 3/4") Per limiti d’impiego differenti da quelli indicati nella presente scheda, fare riferimento all’Ufficio Tecnico Note (1) For liquids available only with orifice diameter do =10 mm Please refer to Technical Dept. for operation limits different than those in this sheet. Valvole di sfioro Le valvole della serie 249 sono disponibili anche nella versione valvole di sfioro. Le Valvole di sfioro, identificate dalla lettera R posta accanto al numero identificante il modello, si caratterizzano come accessori (dispositivi) a pressione aventi funzione di servizio. I materiali di costruzione, le dimensioni ed i limiti di utilizzo secondo il rapporto pressione/ temperatura delle valvole di sfioro, sono gli stessi validi per le valvole di sicurezza. Alcuni dati riportati nella presente pagina possono variare su specifica richiesta, previa analisi e approvazione delle funzioni competenti di Besa® s.pA Relief Valves 249 Series Safety valves are also available as Relief valves. Relief valves, identified by the letter R after the type number, are devices with an operational function, having pressure-bearing housings. Materials, dimensions and application limits depending on Pressure/Temperature ratio for Relief Valves are the same of Safety Valves 249 Series. some information given on these pages can be changed upon specific requests, after besa® qualified office approval. -nryffzLL -LZ1>IZl/“

 Open the catalog to page 1
series 249-2

Valvole di sicurezza Modello 249 Safety Valves Type 249 Cappucci/Caps DN E do Area . DN U Entrata diametro geometrica Uscita geometrico scarico orifizio cm Inlet orifice discharge Outlet diameter area Alzata Max pressione otturatore di taratura bang mm Cappuccio tipo H3, aperto con leva di sollevamento dell’otturatore / Open Cap H3 with plain lifting lever Disc lift Max set Dimensioni scartamenti / Center to face dimensions mm DN E/I dimensioni indicative, da confenmare in caso di ordine / approximate dimensions to be confimed at order *solo con DN uscita 1”1/2...

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series 249-3

Pressione di taratura P / Set press. p bar 0,5 1 1,5 2 2,5 3 4 5 6 7 8 9 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100 105 110 115 120 125 vapore d'acqua sat. / sat. steam kg/h 66 99 128 157 186 215 269 322 376 429 481 534 587 692 796 901 1.006 1.110 1.214 1.319 1.424 1.529 1.634 1.739 1.844 1.948 2.054 2.160 2.265 2.372 2.479 2.587 2.690 2.797 2.909 3.014 3.120 3.228 3.335 3.440 3.547 3.657 3.766 3.877 3.983 4.093 4.203 pressione di taratura P / set press. p Nota 1: le portate sono state calcolate secondo...

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All Besa S.p.A. catalogs and technical brochures

  1. series 139

    3  Pages

  2. series 250

    3  Pages

  3. series 130

    4  Pages

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.