series 139

series 139

series 139

Product catalog summary
Main Fabrication and Operating Characteristics
This document provides detailed specifications for the Series 139 safety valves, including their construction materials, operating temperature ranges, and pressure ratings. The valves are designed to operate within a temperature range from -196°C to +300°C, with various pressure ratings depending on the specific model.

Body and Bonnet Materials
The inlet body is made from martensitic and austenitic stainless steel, while the outlet body can be made from cast iron, carbon steel, or stainless steel. The bonnet materials vary between cast iron and stainless steel, depending on the specific valve configuration.

Valve Specifications
The document lists various valve sizes (DN) and their corresponding pressure ratings (PN), which range from 250 to 600 for different models. The valves are available with standard threaded connections (GAS or NPT) and are certified under PED, ATEX, GOST, and RINA standards.

Operating Characteristics
The valves are suitable for both gaseous and liquid applications, with set pressure ranges from 0.25 to 500 barg. The document specifies coefficients of discharge (Kd) for different orifice sizes, indicating the efficiency of flow through the valve.

Relief Valves
The Series 139 valves are also available as relief valves, identified by the letter 'R' in the model number. These valves share the same material and dimensional specifications as the safety valves.

Flow Rate and Performance
Flow rates are calculated according to EN 4126-1 standards, with overpressure set at 10% of the set pressure. The document includes tables and diagrams illustrating the flow rates for water, air, and steam at various pressures, as well as the trend of the discharge coefficient (Kd) relative to the backpressure ratio (pb/p0).

Material Specifications
The document provides a detailed breakdown of materials used for various valve components, such as the valve body, disc, ball, guide, spring, and bonnet. Materials include various grades of stainless steel, carbon steel, and cast iron, with specific standards like ASTM and EN codes.

Notes and Recommendations
For applications with different temperature and pressure requirements, or for custom material requests, the document advises consulting the Besa® Technical Department. It also notes that flow rates and other specifications may be adjusted upon request and approval.
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Catalog excerpts

series 139-1

Mod. Tfpo di cappello Certi^icati Connessioni 139 pieno boccaglio Cappello chiuso PED-ATEX- Connessioni (molla coperta) GOST-RINA filettate standard GAS o NPT (per esecuzioni diverse, fare riferimento all’Ufficio Tecnico) Type Bonnet type Certifications Connections 139 full nozzle Closed PED-ATEX- Std. threaded (covered spring) GOST-RINA connections GAS or NPT (for different executions please refer to Technical Dept.) Applicazioni Aeriformi - liquidi (1) 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= diametro geometrico dell’orifizio (mm) Inlet body DN - do PN Outlet body PN do= actual orifice diameter (mm) LEGENDA: p=set pressure (barg) pb= backpressure (barg) 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. LEGENDA: p= pressione di taratura (barg); pb= contropressione (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 Valvole di sfioro Le valvole della serie 139 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. Muni dati riportati nella presente pagina possono variare su specifica richiesta, previa analisi e approvazione delle funzioni competenti di Besa® s.pA Relief Valves: 139 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 139 Series. some information given on these pages can be changed upon specific requests, after besa® qualified office approval. -itvzi! -1

 Open the catalog to page 1
series 139-2

Valvole di sicurezza Modello 139 Safety Valves Type 139 Legenda materiali std, Descrizione 139-CR 139-I Valvola con corpo in acciaio Valvola con corpo in acciaio al cromo inossidabile M= Filettatura Maschio / Male threading F= Filettatura Femmina / Female threading Dimensioni scartamenti / Center to face dimensions (mm) 139-Cr 139-I CQ < dimensioni indicative, da confermare in caso di ordine / approximate dimensions to be confimed at order A richiesta e con l'approvazione dell'Ufficio Tecnico, la costruzione delle valvole puo essere eseguita Valves can be manufactured with materials...

 Open the catalog to page 2
series 139-3

Tabella delle Portate / Flow rate table DN 1/2” e DN 3/4” - do 10 mm DN 3/4” - do 12.5 mm acqua/ water vapore d'acqua sat. / sat. steem acqua/ water vapore d'acqua sat. / sat. steam acqua/ water vapore d'acqua sat. / sat. steam acqua/ aria/ wafer air vapore d'acqua sat. / sat. steam Nota 1: le portate sono state calcolate secondo le formule indicate dalla norma EN 4126-1 e con unasovrapressio-ne pari al 10% della pressione di taratura p (0.1 bar se p< 1 barg). Nota 2: i valori intermedi possono essere approssimativamente ricavati per interpolazione lineare. Nota 3: le portate indicate...

 Open the catalog to page 3

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