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Ball valve – Item 441

Ball valve – Item 441

Ball valve – Item 441

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Catalog excerpts

Ball valve – Item 441-1

VALVOLAASFERA MONOBLOCCOPASSAGGIO TOTALECLASSE800 ONE PIECE BALL. VALVE FULL BORE CLASS 800COSTRUZIONECONSTRUCTIONMANUTENZIONE POS MAINTENANCE L'unica perdita possibile e la mancata tenuta della sede normalmente attribuibile all'usura nel tempo delle guarnizioni o a possibili corpi estranei presenti nella tubazione. Tenuto conto del basso costo di questo tipo di valvola, almeno fino al 0 2"1/2, e economicamente consiglibile sostituirla. Per le misure superiori, data la sua conformazione costruttiva e sconsigliabile smontare la valvola per ripristinare le sedi di tenuta qualora queste siano state rovinate; e pertanto necessario che la riparazione venga eseguita in fabbrica, al fine di ricollaudare adeguatamente la valvola a riparazione avvenuta con appositi apparecchi. The sole possible leakage is the non-sealing of the seat normally due to the wear of time of gaskets, or to possible extraneous matters in the pipeline. Considering the low cost of the valve, at least until 0 2"1/2, it is economically recommended to replace it. Due to its shape, for big sizes it is advisable to disassemble the valve to restore the sealing seats if damaged; it is necessary to carry out repairs at a the factory in order to test again the valve, once repaired by appropriate equipments. Prima di montare la valvola aprirla completamente. Accertarsi che l'interno del corpo e le parti filettate siano pulite. Eventuali impurita dovranno essere rimosse per assicurare un corretto funzionamento se si dispone di aria compressa utilizzarla per una migliore pulizia. Avvitare la valvola al tubo filettato usando una chiave proporzionata alla grandezza della stessa. Per ottenere una corretta tenuta sui filetti utilizzare nastro di PTFE o canapa o altro prodotto compatibile al fluido in quantita adeguata, poiche un eccessivo impiego potrebbe causare la deformazione dei tubi. Per la versione con attacchi a saldare questo tipo di valvola, almeno per le piccole dimensioni, non e consigliato in quanto il calore sviluppato dalla saldatura potrebbe causare deformazioni alle guarnizioni. Dovendo necessariamente utilizzare questo tipo di valvola occorrera raffreddare abbondantemente il corpo in fase di saldatura con panni bagnati. Per valvole con attacchi a saldare e consigliabile l'impiego di modelli specifici quali figure 442 - 448 - 449. Before to assemble the valve at the pipeline, open it completely. Check inside the body and the threaded parts to be clean, possible impurities have to be removed in order to ensure a right functioning. If compressed air is at your disposal, use it for a better cleaning. Screw the valve at the threaded pipe using a suitable wrench. In order to get a correct sealing on threadings it is useful to employ PTFE or hempen tape or other product compatible with the fluid, in adequate quantity since an excessive employ could cause the pipe deformation. It is not advisable to assemble this kind of valve at welding connections, at least for small sizes, since the heat released by the welding could cause gaskets deformation. Being forced to use this kind of valve it is needed to chill the body abundantly by wet cloth during the welding. Specific valves with welding connections are items: 442 -448 -449.

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Ball valve – Item 441-2

VALVOLA A SFERA MONOBLOCCO PASSAGGIO TOTALE CLASSE 800 ONE PIECE BALL VALVE FULL BORE CLASS 800 CARATTERISTICHE FEATURES ESECUZIONE STANDARD / STANDARD EXECUTION Corpo, manicotti e premibussola dacciaio al carbonio. Sfera e stelo dacciaio inox. Anelli sede e guarnizioni stelo di PTFE. Guarnizioni corpo di Viton. Leva dacciaio. Attacchi a manicotti filettati NPT. Carbon steel body, coupling and gland. Stainless steel ball and stem. PTFE seat rings and stem gaskets. Viton body gaskets. Steel handle. NPT gas threaded connections. Sfera di acciaio inox AISI 316. AISI 316 stainless steel ball. Esecuzione...

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