Nome del prodotto
3-Way Vacuum Ball Valve – Manual or Pneumatic, KF NW40 / NW50, 316, L-Port or T-Port (V-3WV / V-3WVM)
Riepilogo del prodotto
A 3-way vacuum ball valve for switching a vacuum line: one pump shared between two systems, or one line isolated or connected from a single valve. Polished cast 316 (CF8M) body, PTFE seats, full port, L-port or T-port, on KF (NW) clamp flanges NW40 (1-1/2″) and NW50 (2″). Two builds on one body: the V-3WV with a stainless lever and locking plate, and the V-3WVM with a rack-and-pinion air actuator (DA or SR, 4–8 bar) on an ISO 5211 pad. For pump-side switching on forelines, backing lines and traps, not as a high-vacuum chamber gate.
ISO 9001 · CE · Manufacturer since 1999 · Made in Taiwan
Manual or Pneumatic? One 3-Way Vacuum Ball Valve, Two Builds (V-3WV / V-3WVM)
This 3-way vacuum ball valve switches a vacuum line: one pump shared between two systems, or one line isolated or connected from a single valve. The body is cast 316 stainless steel (ASTM A351 CF8M) with a polished surface and PTFE seats, on KF (NW) clamp flanges in NW40 (1-1/2″) and NW50 (2″). The same body comes in two builds. The V-3WV has a stainless quarter-turn lever with a locking plate. The V-3WVM carries a rack-and-pinion air actuator on an ISO 5211 pad, so a PLC or solenoid does the switching and no one has to stand at the valve.
| V-3WV (manual) | V-3WVM (pneumatic) | |
|---|---|---|
| Funzionamento | Quarter-turn stainless lever with locking plate | Rack-and-pinion air actuator, double acting (DA) or spring return (SR), 4–8 bar |
| Control options | — | Elettrovalvola, scatola dei finecorsa, posizionatore |
| Ideale per | Switching points operated by hand a few times a day | Lines switched on a signal, sequenced by a PLC, or cycled often |
L-Port or T-Port 3-Way Ball Valve for Vacuum Lines
The ball is bored L-port or T-port. Both patterns are available in NW40 and NW50; tell us which one you need when you request a quote.
| L-port 3-way ball valve | T-port 3-way ball valve | |
|---|---|---|
| Flow path | Connects the common port to one of the two other ports at a time; the third port is always closed | Connects two ports, or all three ports at once |
| Mansioni tipiche | Selector: one pump, one line at a time | Combining two lines, or keeping a second path open while switching |
Specifiche tecniche principali
| Tipo | 3-way vacuum ball valve, full port, on/off duty |
| Modelli | V-3WV (manual lever) / V-3WVM (pneumatic actuator) |
| Taglie | NW40 (1-1/2″) e NW50 (2″) |
| Raccordi terminali | KF (NW) vacuum flange with clamp and centering ring, no bolts |
| Port pattern | L-port or T-port |
| Corpo e palla | ASTM A351 CF8M (cast 316 stainless steel), polished, as standard; CF8 (cast 304) made to order |
| Sedile | PTFE |
| Foratura | Full port, unrestricted bore through the valve |
| Temperatura di esercizio | Valve body −20 °C to +180 °C (set by the PTFE seats); actuator −20 °C to +80 °C |
| Manual operation | V-3WV: quarter-turn stainless lever with locking plate |
| Attuatore | V-3WVM: rack-and-pinion, aluminum alloy body, double acting (DA) or spring return (SR), air supply 4–8 bar (about 58–116 psi), ISO 5211 direct mount |
| Control options | Elettrovalvola, scatola dei finecorsa, posizionatore |
| Servizio | Switching and isolating vacuum lines. On/off duty, not for throttling |
| Dimension sheets | See the PDF downloads above (NW40, NW50) |
Why a Ball Valve for Switching a Vacuum Line
A quarter turn moves the ball from one path to the other, and in either position the full-port bore leaves nothing in the gas path, so the valve does not choke the pumping speed of the line it sits in. That is the job this valve is built for: choosing which line the pump sees, or shutting a line in or out. It is not a regulating valve.
The PTFE seats wipe across the ball every time it turns, which is why ball valves hold up in lines that carry deposits or particles better than a bellows-sealed valve would. The seats set the temperature limit of the body, −20 °C to +180 °C.
KF NW40 / NW50 Ends
KF (also written NW, QF or ISO-KF) is the small quick-clamp vacuum flange: a centering ring with an O-ring sits between two flanges and a hand-closed clamp holds them together, no bolts and no tools. This valve is made in NW40 and NW50, the two largest KF sizes, matching 1-1/2″ and 2″ vacuum lines. For KF16 to KF50 two-way isolation see the manual vacuum valve; for larger ISO-K DN80 / DN100 lines see the vacuum rated ball valve, pneumatic. Both are linked under Applications below.
Applicazioni
Where a 3-way vacuum ball valve of this type is actually used:
- Sharing one pump between two systems: the valve sits on the backing line of a rotary vane, scroll or diaphragm pump and selects which of two lines the pump serves: laboratory vacuum stations and electron-microscope sample-preparation lines.
- Thin-film coating and semiconductor support lines: switching, combining or splitting flow around reactors, traps, scrubbers and exhaust lines on coating, etching and abatement tools, including the “dirty” MOCVD, PVD and CVD processes where the wiping PTFE seats tolerate deposits.
- Foreline and trap duty: isolating or connecting a line on the pump side of a system, where a rugged PTFE-seated ball valve is the usual choice at rough-vacuum pressures.
- Points that will be automated later: start with the V-3WV lever version and move to the V-3WVM when the line goes to PLC control; the same body and flanges stay in the line.
Related: for two-way isolation on the same KF flanges see the manual vacuum valve (KF NW16–NW50 & ISO80) or the vacuum rated ball valve, pneumatic (NW50 KF & ISO-K DN80 / DN100); the same ISO-K sizes with a lever are the manual vacuum ball valve, ISO-K DN80 / DN100. KF/NW centering rings are stocked to match. For non-vacuum service see the Valvola a sfera pneumatica a 3 vie, oppure sfoglia tutti vacuum valves.
Domande frequenti
Qual è la differenza tra L-port e T-port?
L-port connects the common port to one of the other two ports at a time, with the third port closed. It works as a selector. T-port can connect two ports, or all three at once, so it can combine lines or keep a second path open while switching. Tell us which pattern you need when you order.
Manual or pneumatic — which should I choose?
Choose the V-3WV lever version for switching points operated by hand. Choose the V-3WVM if the valve is switched on a signal, sequenced by a PLC, or cycled often; its rack-and-pinion actuator mounts on an ISO 5211 pad and takes a solenoid valve, limit switch box or positioner.
A doppio effetto o con ritorno a molla: quale scegliere?
Double acting (DA) uses air for both strokes and stays in its last position if air is lost. Spring return (SR) uses springs for the return stroke, so on air loss the springs drive the valve to its preset position. That matters where a vacuum line must default to a known path.
Posso aggiungere un'elettrovalvola o un finecorsa?
Yes. The V-3WVM actuator accepts a solenoid valve for control, a limit switch box for position feedback, and a positioner if your control scheme calls for one. Tell us your setup when you request a quote.
Quali dimensioni e flange sono disponibili?
NW40 (1-1/2″) and NW50 (2″), both on KF (NW) vacuum flanges with clamp and centering ring. For KF16 to KF50 two-way isolation see the manual vacuum valve. For larger ISO-K DN80 / DN100 lines see the vacuum rated ball valve, pneumatic, or its manual version. All three are linked above.
Qual è la temperatura di esercizio?
Valve body −20 °C to +180 °C, set by the PTFE seats. The pneumatic actuator on the V-3WVM is rated −20 °C to +80 °C.
Is it available in 304 stainless?
316 (cast CF8M) is standard. 304 (cast CF8) is made to order. Tell us the size, port pattern and quantity when you request a quote.
Can the manual version be automated later?
Yes. The same body is offered with the pneumatic actuator fitted as the V-3WVM, so a line that starts on the lever version can move to the actuated version without changing the flanges or piping.
È prevista una quantità minima d'ordine?
No. Non abbiamo un quantitativo minimo d'ordine. Dicci di cosa hai bisogno e ti faremo un preventivo.
Politica di esempio
Siamo lieti di fornire ai clienti campioni di prodotto per valutare la qualità o effettuare test. Il processo inizia in genere con un preventivo basato sulle specifiche del cliente.
Se il prezzo è accettabile, possiamo offrire campioni gratuiti o a pagamento, a seconda del tipo di prodotto e della disponibilità.
Le spese di spedizione sono a carico del cliente.
Processo d'ordine
Dopo aver confermato i requisiti del prodotto e altri dettagli con il cliente, emetteremo una conferma di vendita per approvazione. Una volta confermata, il cliente è tenuto a versare un deposito 30% per procedere con la produzione.
Quando la produzione di massa è completata e la merce supera l'ispezione, il cliente deve pagare il saldo 70% prima di organizzare la spedizione.
Prodotti correlati
Domande frequenti
A. Come posso richiedere un preventivo?
Si prega di fornire una scheda di richiesta dettagliata che includa le specifiche del prodotto, i materiali, le quantità ed eventuali requisiti speciali. Vi offriremo un'offerta basata sulla vostra richiesta.
B. Quali sono i termini di quotazione?
I nostri preventivi si basano in genere su Condizioni FOB. Tuttavia, possiamo anche offrire CFR, CIFo altri Incoterms su richiesta.
C. Qual è la vostra quantità minima d'ordine (MOQ)?
MOQ depends on the product. We operate on a made-to-order basis, and trial orders are welcome. For smaller orders, freight is arranged and borne by the buyer.
D. Quali sono i termini di pagamento?
Per T/T - 30% acconto sulla conferma d'ordine e 70% saldo prima della spedizione.
E. Qual è il vostro tempo di consegna?
I tempi di consegna dipendono dalla quantità ordinata e dalle specifiche. Vi confermeremo i tempi esatti quando Richiedi un preventivo.
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