Specification

DN300 Class 300 Carbon Steel/Stainless Steel Flanged Swing Check Valve

I. Product Overview

NEWWAY DN300 Class 300 carbon steel/stainless steel flanged swing check valve is a key backflow prevention component for large-diameter industrial pipelines. Made of carbon steel (WCB) or stainless steel (CF8/CF8M) and featuring a flanged connection, it uses a swing disc to control unidirectional flow of water, oil, gas, and other media. It operates at -20℃~425℃ and Class 300 pressure, closing automatically when flow reverses to protect pumps and pipelines. Compliant with API 6D and ASME standards, it’s ideal for oil & gas, power, and chemical industries.

II. Key Attribute Parameters

Size: DN300 (12″), suitable for large-diameter industrial pipelines.

Pressure Range: Class 300 (5.0MPa), for medium to high-pressure systems like oil transmission.

Temperature Range: -20℃~425℃, adapting to heated media such as steam.

Material Configuration:

Body & Bonnet: WCB (carbon steel) for general use; CF8/CF8M (stainless steel) for corrosion resistance.

Disc & Arm: WCB or CF8/CF8M, ensuring strength and smooth swing.

Seat: Metal-to-metal (A105), for tight sealing under high pressure.

Gasket: Graphite + SS304, resisting high temps and preventing leakage.

Fasteners: A193 B7 studs, A194 2H nuts, withstanding pressure.

Connection: Flanged (ASME B16.5), for secure pipeline integration.

Standards: API 6D, ASME B16.34, API 598.