Valvola a sfera pneumatica a saldare di testa — Estremità allungate, a 3 pezzi, 316, 1000 WOG, JIS Sch 5S

Descrizione del prodotto

A valvola a sfera a saldatura di testa pneumatica in 316 stainless steel, three-piece body, 1000 WOG, full port, 3/8″ to 4″. The weld ends are extended — noticeably longer than a standard butt weld end — and the valve is driven by an air actuator on an ISO 5211 pad for remote on/off.

It is the actuated version of our manual extended butt weld valve. Everything about the body is the same; the difference is the actuator on top instead of a lever.

Read the two sections below before you order. One tells you why the ends are long. The other tells you what pipe this valve fits, and what pipe it does not.

Why the Weld Ends Are Long

A ball valve seals on PTFE. PTFE begins to degrade well below the temperature of a weld pool.

On a standard butt weld valve, the weld sits close to the body — and the heat travels down the metal into the seats. That is why people weld a valve in, pressure-test the line, and find the valve leaking. The seals were cooked during installation, before the valve ever saw a drop of product.

The extended ends move the weld away from the seats. The extra length is the heat sink. You weld the valve in fully assembled — no dismantling, no removing the ball and seats.

And because the body is three-piece, you can still take it apart afterwards for servicing: undo the body bolts, lift the centre section out, replace the seats, put it back. The ends stay welded in the line. Nothing gets cut out.

The Air Actuator

The valve is turned by a rack-and-pinion pneumatic actuator in aluminium alloy, mounted directly on the valve’s ISO 5211 pad — no adapter kit, no field re-piping.

• A doppia azione (DA) — air opens, air closes. For lines with a steady, reliable air supply.
• Ritorno a molla (SR) — air opens, the spring returns the valve on air loss. Choose the spring direction (fail-open or fail-closed) for your process.
• Air supply: 4–8 bar.
• Add-ons: solenoid valve, limit switch box (position feedback), and a positioner for modulating control.

Not sure DA or SR? Tell us what happens to your process if the air fails, and we will tell you which one — and which spring direction — you want.

What Pipe Does It Fit? (Read This)

We would rather lose the order than have you weld this valve into the wrong pipe.

If you are running Schedule 40 pipe, this is the wrong valve and we will tell you so. Send us the pipe spec — standard, size and schedule — before you order, and we will confirm whether this valve mates with it. That one email is cheaper than a valve you cannot use.

Dimensioni

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ØD is the pipe outside diameter. T is the wall thickness. Those are the two numbers a welder actually needs, and most valve makers do not publish them. The ISO 5211 code is the actuator mounting pad. Check them against your pipe and actuator before you order.

What It Is Made Of

The wetted and pressure-holding parts, and what each one is made of.

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Specifiche tecniche

Valve body

Attuatore

Prefer a Lever, or a Different End?

This is the actuated, extended butt weld version. If that is not quite what you need:

• Manual version of this valve — same extended butt weld body, hand lever instead of an actuator.
• Pneumatic 3-piece ball valve (threaded / socket weld / standard butt weld) — same air actuator, but standard end connections instead of extended butt weld.
• Manual 3-piece ball valve — PT threaded / socket weld / butt weld — choose the end connection, hand lever.

Al posto giusto

• Automated welded stainless lines that still need servicing — remote on/off from the actuator, and the three-piece body still opens in place so the seats can be replaced without cutting the valve out.
• JIS Sch 5S thin-wall piping — water, oil, gas and process lines up to 1000 WOG.
• Systems that run JIS pipe and need an actuated valve — Japanese-standard plant and equipment, and the JIS supply chains across East and Southeast Asia.

Acquistare da noi

• Non è previsto un quantitativo minimo d'ordine.
• Produttore, non società commerciale. Il nostro stabilimento a Taiwan, valvole in acciaio inossidabile dal 1999.
• Certificato di macinazione su richiesta.
• Tempi di risposta per i preventivi: entro 24 ore.

Richiedi un preventivo — risposta entro 24 ore →

Send us your pipe spec and whether you want DA or SR — and we will confirm the valve and actuator before you commit.

Domande frequenti

Perché le estremità delle saldature sono prolungate?

Per tenere il calore della saldatura lontano dalle sedi in PTFE. In una valvola standard con saldatura di testa, la saldatura si trova a stretto contatto con il corpo e il calore si propaga lungo il metallo fino alle sedi; ecco perché una valvola può superare l’ispezione, essere saldata in posizione e poi presentare perdite durante la prova di pressione. La lunghezza aggiuntiva funge da dissipatore di calore, consentendo di saldare la valvola completamente assemblata senza smontarla.

Su quale tubo si monta questa valvola?

JIS pipe dimensions, Schedule 5S wall thickness only. It will not mate cleanly with Schedule 40 or heavier pipe without machining a transition — the wall thickness does not match and the bore will step at the weld. Send us your pipe standard, size and schedule and we will confirm before you order.

Is it made to JIS pipe dimensions?

Yes. The bore, pipe outside diameter and wall thickness follow JIS pipe standards, Schedule 5S — the thin-wall stainless dimensions used in Japanese-standard plant and across the JIS supply chains in East and Southeast Asia. That is the reason to choose it over an ANSI/ASME valve: it mates with JIS pipe without a transition piece.

Double acting or spring return?

Double acting (DA) uses air to open and air to close, for lines with a reliable air supply. Spring return (SR) uses air to open and a spring to return the valve when the air fails — you choose whether it fails open or fails closed. Tell us what your process needs to do on air loss and we will specify it.

What is the actuator mounting?

ISO 5211, sized F03 to F10 depending on the valve size. The pad is on the valve, so the actuator bolts straight on with no adapter kit.

Can I add position feedback or modulating control?

Yes. A limit switch box gives open/closed feedback, a solenoid valve drives it from a control signal, and a positioner is available for modulating (throttling) duty.

È possibile effettuare la manutenzione della valvola dopo che è stata saldata?

Sì, è proprio questo il motivo per cui il corpo è composto da tre parti. Basta svitare i bulloni del corpo e sollevare la sezione centrale per sostituire i sedili. Le estremità saldate rimangono al loro posto. Non occorre tagliare nulla.

Quali taglie producete?

3/8″ to 4″. Ten sizes, all in the dimension table on this page, including pipe outside diameter and wall thickness.

Qual è la pressione nominale?

1000 WOG, full port.

Is there a manual version?

Yes — the same extended butt weld body with a hand lever instead of an actuator. It is linked above.

È previsto un quantitativo minimo d'ordine?

No. Dicci di cosa hai bisogno e ti faremo un preventivo.