LIMA vanta un’esperienza pluriennale nella realizzazione di seggi e anelli inserto, che vengono assemblati all’interno di valvole destinate poi a gasdotti, oleodotti, piattaforme petrolifere, impianti criogenici e apparecchiature per il settore chimico.

Sia i seggi sia gli anelli inserto hanno lo scopo fondamentale di garantire la massima tenuta durante il funzionamento della valvola. Le particolari condizioni di lavoro dei settori coinvolti, unite alla complessità delle operazioni e agli enormi costi dovuti ad eventuali fermi degli impianti, impongono il massimo grado di qualità e resistenza per quanto riguarda i materiali impiegati.

Proprio per questo motivo, sempre più spesso vengono richiesti seggi e anelli inserto in materiale termoplastico ed elastomerico, in grado di garantire elevate prestazioni in termini di resistenza meccanica, elasticità, resistenza termica, lavorabilità e resistenza a sostanze quali metano, anidride carbonica, acido solfidrico, vapore surriscaldato e idrocarburi solforati.

La realizzazione di questi particolari prevede estrema cura e precisione: il rispetto di dettagli come smussi, fasce, rugosità, profondità delle cave, angoli, altezze presunte delle sfere e raggiature è di fondamentale importanza per il corretto funzionamento della valvola. Per questa ragione ogni fase del ciclo produttivo viene accompagnata da controlli stringenti ed accurati, eseguiti tramite comparatori, altimetri e macchine di controllo ottico.

Seggi e Anelli Inserto

Controllo dei seggi tramite comparatore

Per una scelta corretta del materiale bisogna sempre tenere conto di parametri quali il tipo di fluido di lavoro, le pressioni massime, le temperature d’esercizio e il numero di cicli di apertura e di chiusura.

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LIMA è in grado di realizzare seggi oltre i 1.000 mm di diametro esterno. La qualità delle lavorazioni è garantita sia dalle alte tecnologie a nostra disposizione sia dalla professionalità del nostro personale: ogni seggio viene controllato mediante altimetri, comparatori e set di sfere calibrate.

  • PTFE
  • PEEK
  • PA
  • PE
  • POM

Quando le condizioni di lavoro si fanno estremamente critiche, si preferisce realizzare seggi in materiale metallico dotati di una cava nella quale inserire un anello in materiale termoplastico o elastomerico, in grado di garantire la tenuta della valvola. LIMA, oltre a realizzare anelli inserto fino a 1.400 mm di diametro esterno, dispone di una pressa idraulica apposita per l’assemblaggio degli anelli inserto all’interno delle corrispettive sedi metalliche.

  • PTFE
  • PEEK
  • PA
  • PE
  • POM
  • FKM
  • HNBR