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

Description du produit

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 clapets anti-retour en acier inoxydable.

Models & Sizes

Class 150 or JIS 10K — Which Flange?

The two standards are not interchangeable. At 3 inch the Class 150 flange has 4 bolt holes and the JIS 10K flange has 8, and at 4 inch the bolt circles are 190.5 mm and 175 mm, so neither size lines up in the normal installed position. At 2 inch the bolt circles (120.5 and 120 mm) and the four 19 mm holes nearly match, but the flange diameter and raised face still differ, so the joint matches neither standard. 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 (203, 241 and 292 mm for 2, 3 and 4 inch), so the choice never affects your pipe layout.

Caractéristiques techniques principales

Applications

• Pump discharge lines — stops backflow and reverse rotation when the pump shuts down.
• Traitement de l'eau 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 stainless steel swing check valve.

FAQ

Are Class 150 and JIS 10K flanges interchangeable? No. At 3 and 4 inch the bolt count or bolt circle differs, so a Class 150 valve will not bolt onto JIS 10K counter-flanges in the normal position. At 2 inch the bolt holes nearly line up, but the flange diameter and raised face still differ, so the joint matches neither standard. 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.

Quel est le montant minimum de la commande ? Aucune quantité minimale de commande n'est requise : nous acceptons les commandes de toute taille, y compris les petites commandes d'essai. Pour les petites commandes, le transport est organisé et pris en charge par l'acheteur. Le paiement s'effectue par virement bancaire (T/T) : 30% à la confirmation de la commande, 70% avant l'expédition.