Swing Check Valve | Flanged Ends | Metal Seated | WCB/SS304/SS316 | 2″-24″ | Class 150-900 | Oil & Gas, Water, Industrial

Product Overview

The Flanged Swing Check Valve is a premium-grade, automatic non-return valve designed to prevent reverse flow in oil & gas, water, and industrial piping systems. Manufactured with a rugged WCB carbon steel, SS304, or SS316 body and a 13Cr/Stellite hardfaced metal seat, this valve provides excellent corrosion resistance, wear resistance, and long service life in demanding environments. The flanged ends conform to ASME B16.5 standards with pressure ratings from Class 150 to 900 (JIS10-20K, PN1.0-32.0MPa), ensuring compatibility with international piping systems. Designed and manufactured in accordance with API 6D and BS 1868 standards, and tested to API 598, this valve is available in sizes from 2″ to 24″ (DN40-DN600). Available with manual, worm gear, pneumatic, hydraulic, or electric actuation options. Backed by ISO, EAC, WRAS, and CE certifications, this valve is the trusted choice for engineers requiring reliable backflow protection in critical applications.

Flanged Swing Check Valve

Technical Specifications

Parameter	Specification
Product Name	Swing Check Valve / Flanged Swing Check Valve
Design Standard	API 6D, BS 1868, ASME B16.34
Face-to-Face Standard	ASME B16.10
Flange Standard	ASME B16.5
Testing Standard	API 598
Size Range	2″ – 24″ (DN40 – DN600)
Pressure Rating	Class 150 – 900 (JIS10-20K, PN1.0-32.0MPa)
Body Material	WCB Carbon Steel / SS304 / SS316
Disc Material	A216 WCB / SS304 / SS316
Seat Material	13Cr / Stellite Hardfaced (Metal-to-Metal Seal)
Trim Material	13Cr, Stellite

Flanged Swing Check Valve

Key Features

• 1. API 6D & BS 1868 Compliant – Industry Standard Design
• 2. Metal-to-Metal Hard Seal – Extreme Durability
• 3. Premium Material Options – WCB / SS304 / SS316
• 4. Wide Pressure Range – Class 150 to 900
• 5. Multiple Actuation Options

Applications

• Oil & Gas Pipelines
• Water Supply & Treatment
• Power Generation
• Chemical & Petrochemical Processing
• Industrial Process Lines

Flanged Swing Check Valve

Packing and Shipment

Packing depends on the product type and quantity. Options include bundle packing, wooden crates, or boxes with proper protection for flange faces. Shipment can be arranged by sea, railway, air, or as per customer’s request.

Company Profile

LUOYANG DATANG ENERGY TECH CO., LTD is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for fire protection, HVAC, water treatment, and industrial piping systems worldwide. All products are manufactured to international standards with UL/FM, CE, and ISO 9001 certifications. With over 10 years of experience, a modern facility of 80,000 m², and 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

Payment Terms

T/T, L/C at sight, Western Union & PayPal, etc.

Flanged Swing Check Valve

FAQ

1. Can a swing check valve be installed vertically?

No. Swing check valves must be installed horizontally (or in slightly sloping lines) because gravity is required to return the disc to its seat when flow stops. Vertical installation prevents the disc from fully closing, resulting in backflow.

2. What is the difference between metal seal and soft seal check valves?

Metal seal (13Cr/Stellite hardfaced) withstands higher temperatures (up to 600°C) and abrasive media, offering excellent corrosion and erosion resistance for high-pressure and severe service applications. Soft seal (EPDM/PTFE) provides zero leakage shut-off but has a limited temperature range (typically ≤120-260°C). This product features a metal seal, suitable for high-temperature, high-pressure, and abrasive media applications.

3. What is the difference between API 6D and BS 1868 standards?

API 6D is the design standard for pipeline valves in the oil and gas industry, covering gate, ball, and check valves. BS 1868 is the British standard specifically for steel check valves with flanged and butt-welding ends. The two standards are complementary in many aspects. This product meets both standards.

4. What testing standard does this check valve comply with?

This product is tested to API 598, which covers shell integrity, seat tightness, backseat, and low-pressure sealing tests. API 598 is the primary testing standard referenced in valve purchase orders for oil and gas projects.

5. What is the difference between WCB, SS304, and SS316 body materials?

WCB is carbon steel for general high-temperature service up to approximately 425°C. SS304 is stainless steel with excellent corrosion resistance for water and mild chemicals. SS316 contains molybdenum, offering better resistance to pitting and crevice corrosion in chloride environments, suitable for seawater and chemical applications. The choice depends on media type and corrosivity.

Flanged Swing Check Valve