Valvola a sfera a vuoto manuale e con montaggio in alto, acciaio inossidabile 316 — NW16/25/40/50 KF e ISO80, a tre pezzi

Descrizione del prodotto

This vacuum ball valve is a three-piece, full-port valve in cast 316 stainless steel (ASTM A351 CF8M) with PTFE seat and gaskets, built for vacuum and negative-pressure isolation. Flange options cover KF (NW16, NW25, NW40, NW50) and ISO-K (ISO80), sizes 1/2″ to 2-1/2″ — the clamp-style flanges connect and open without tools, the way vacuum lines are built.

Two builds share the same body: the V-3A with a stainless lever for manual operation, and the V-3AM with an ISO 5211 direct-mount pad and reinforced stem seal (Viton O-ring plus PTFE packing) that takes a pneumatic or electric actuator without brackets. Need larger or automated vacuum valves? See the valvola a sfera pneumatica a vuoto (ISO-K DN80/DN100), the two-piece manual vacuum ball valve (ISO100), oppure sfoglia tutti valvole per il vuoto.

Manual or Direct-Mount?

Specifiche tecniche principali

Materiali

V-3A manual version — 17 parts, matching the numbered circles ①–⑰ in the drawing below. The V-3AM direct-mount version shares the wetted parts and adds the Viton O-ring stem seal, Belleville washer and ISO 5211 hardware (20 parts — see its dimension sheet PDF).

Dimensioni (mm)

L, bore Ød1, flange Ød2 and flange thickness C are identical for both builds; H differs (lever vs mounting pad), and S is the V-3AM stem flat. Full drawings in the V-3A e V-3AM dimension sheets (PDF).

Campi di applicazione e ubicazioni

• Laboratory vacuum systems: isolation points on pump lines and manifolds built with KF fittings.
• Semiconductor support lines: roughing and foreline isolation where 316 stainless construction is required.
• Food & pharmaceutical vacuum: negative-pressure processing and packaging lines.
• Vacuum pump protection: shutting off sections for service without venting the whole system.

Domande frequenti

What is the difference between KF (NW) and ISO-K flanges? Both are clamp-style vacuum flanges. KF (also written NW or QF) covers the small sizes — NW16 to NW50 on this valve — sealed with a centering ring and clamped by hand. ISO-K is the larger series; the 2-1/2″ size here uses ISO80. Match the flange to the fittings your system already uses.

Manual or direct-mount — which should I choose? Choose the V-3A lever version for hand-operated isolation points. Choose the V-3AM if the valve is — or may later be — automated: its ISO 5211 pad takes a pneumatic or electric actuator directly, with no bracket to fabricate.

È a passaggio totale? Yes — the bore is unrestricted through the valve (see the Bore Ød1 column in the dimensions table), keeping conductance high on vacuum lines.

Can the valve be serviced? Yes. The three-piece body unbolts, so the seats and ball can be inspected, cleaned or replaced without cutting the valve out of the line.

Quali guarnizioni vengono utilizzate? PTFE seat, gaskets and packing on both builds; the V-3AM adds a Viton O-ring on the stem for a reinforced seal under vacuum.

Qual è l'ordine minimo? Nessun quantitativo minimo d'ordine: accettiamo ordini di qualsiasi entità, compresi piccoli ordini di prova. Per gli ordini di piccole dimensioni, le spese di trasporto sono a carico dell'acquirente. Il pagamento avviene tramite bonifico bancario (T/T): 30% alla conferma dell'ordine e 70% prima della spedizione.