Stainless Steel Flanged Check Valve – Swing Type, 2″–4″, Class 150 / JIS 10K

Descrizione del prodotto

This 304 flanged check valve is a swing-type non-return valve for 2″, 3″ and 4″ flanged lines. A hinged disc swings open with forward flow and drops shut when flow stops or reverses — no power, no operator. The body, disc, arm and bonnet are cast 304 stainless steel (CF8), with a CF8M (cast 316) version made to order, sealed with a PTFE gasket.

Every size is available with two flange standards: ASME B16.5 Class 150 for American-spec piping, or JIS B2220 10K for Asian-spec plants. Smaller line? Our threaded swing check valve covers 1/2″–3″, the one-piece silent check valve covers 1/2″–2″, or browse all valvole di ritegno in acciaio inossidabile.

Models & Sizes

Class 150 or JIS 10K — Which Flange?

The two standards use different bolt circles, flange diameters and raised faces, so they do not bolt together — a Class 150 valve cannot be mounted on JIS 10K counter-flanges, or the other way around. The valve body itself is the same; only the flange drilling changes. Choose by the standard your piping already uses: ASME B16.5 Class 150 is the norm in US-spec plants, JIS B2220 10K in Japanese- and much Asian-spec equipment. If you are not sure, tell us when you request a quote — the face-to-face length is identical for both, so the choice never affects your pipe layout.

Specifiche tecniche principali

Applicazioni

• Pump discharge lines — stops backflow and reverse rotation when the pump shuts down.
• Trattamento dell'acqua and distribution mains, 2″–4″ — the service that AWWA C508 swing check valves are written for.
• Wastewater lift stations — force-main protection on screened wastewater (not sludge or slurry).
• Chemical and petrochemical process piping — general one-way flow protection (not dosing-pump service).
• HVAC chilled-water and condenser-water pumps — in commercial building mechanical rooms.
• Cooling-tower and heat-exchanger loops — cooling-water circulation in industrial plants.
• General plant water piping — power and pulp-and-paper plants (not boiler feed).

Flanged ends let the valve be unbolted for inspection or cleaning without cutting the line. For threaded lines, see the valvola di ritegno a battente in acciaio inossidabile.

Domande frequenti

Are Class 150 and JIS 10K flanges interchangeable? No. The bolt circles, flange diameters and raised faces differ, so a Class 150 valve will not bolt onto JIS 10K counter-flanges or vice versa. Match the valve to the flange standard your piping already uses — we stock both for every size.

Which sizes are available? Three models: C-2F is 2″, C-3F is 3″ and C-4F is 4″, each with ASME Class 150 or JIS 10K flanges. For 1/2″–3″ threaded lines, see our threaded swing check valve.

What material is the valve? Body, disc, arm and bonnet are cast 304 stainless steel (CF8), with a PTFE gasket — in stock. A cast 316 (CF8M) version is made to order for chloride-bearing or more corrosive media.

How does the swing mechanism work? The disc hangs on a hinged arm inside the body. Forward flow pushes it open; when flow stops or reverses, the disc swings back onto the seat and blocks backflow automatically — no power or operator needed.

Where can I find the dimensions? Each model and flange standard has its own dimension sheet — download the PDF from the cards at the top of this page. It includes the assembly drawing, flange dimensions and face-to-face length.

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.