Cast Swing Check Valve

1. Design and manufacture stadnard: BS1868
2. Face to face: ASME B16.10
3. Flange ends standard: ASME B16.5
4. Inspection and test standard: API598

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Description

BB, Swing type, anti-rotation disc, renewable seat rings, non-penetrate disc shaft, horizontal or vertical service, flanged or BW ends.

Standards compliance

• Design and Manufacture: Cast steel check valve to BS 1868,

• ASME B16.34 and API 6D;

• Forged steel check valve to API 602.

• Inspection and Test: API 598 or API 6D.

• End flange dimension: ASME B16.5(for NPS<24);

• ASME B16.47 series B. API 605 or ASME B16.47 series A. MSS SP -44(for NPS > 24).

• BW end dimension: ASME B16.25.

• Socket-weld dimension: ASME B16.11.

• Face to face and end to end: ASME B16.10.

• Pressure-temperature ratings: ASME B16.34.

• Wall thickness dimension: API 600 and BS 1868.

The features of check valve

• Bolted Bonnet; Swing and lift disc; Metallic seating surfaces.

Flanged&butt-welding ends swing check valves projets design features.

• Flanged & Butt-Welding Ends Swing Check Valves are used in pipes under pressures between, Class 150 ~900Lb, working temperatures between -29-570°C, They are used in industries include oil, chemistry, pharmaceutical, fertilizer, and power generation to prevent the backward flux of the media.

• Main structural features:

• 1. Rational structure, reliable sealing, excellent performance, pretty appearance.

• 2.Co-radix alloy welded sealing surface, anti-wearing, erosion-proof abrasion-proof and longer use life.

• 3.Inside-set bolt-bearing structure reduces leakage and reliable use

• 4. Under pressures 16.0Mpa, Class1500, the valve belly, self-tightening structure offers atighter offers a tighter sealing for a higher medium pres-sure.

• 5. Different parts materials and different sizes for flange, butt-welding are available for sensible combination according to different working facts and customers’ requirements.

Cast Swing Check Valve FAQs

1. What is a cast swing check valve used for?

A cast swing check valve is a non‑return valve where a hinged disc swings open with forward flow and closes under reverse flow or gravity. It is commonly used in water, steam, oil & gas, power plants, and general industrial pipelines to prevent backflow and protect pumps and equipment.

2. What are the main advantages of a cast swing check valve?

Its main advantages include simple structure, low pressure drop, good flow capacity, and reliable automatic operation without external actuation. The cast body design also offers good strength and durability for long‑term service in medium‑ to high‑pressure lines.

3. What is a WCB cast steel swing check valve?

A WCB cast steel swing check valve is made of ASTM A216 Grade WCB cast steel, which is suitable for high‑temperature service up to about 425–450 °C. It is widely used in high‑pressure steam and hydrocarbon service pipelines where durability and thermal stability are critical.

4. What materials are available for cast swing check valves?

Common body materials include cast iron, nodular (ductile) iron, cast carbon steel (WCB), and cast stainless / alloy steels. Discs and seats may be stainless steel, renewable metal‑to‑metal rings, or soft‑seated materials (e.g., EPDM, NBR) according to media and pressure class.

5. What pressure ratings and sizes are typical for cast swing check valves?

Typical pressure ratings range from PN10–PN40 for cast iron and PN25–PN100 / Class 150–600 for cast steel. Size ranges often cover DN15–DN300 for cast iron and DN15–DN600 or larger for cast steel swing check valves, depending on manufacturer and design.

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