What Makes a Swing Check Valve Essential for Your Piping System?

When it comes to maintaining flow efficiency and preventing backflow in industrial, commercial, or residential piping systems, few components are as critical as the Swing Check Valve. But what exactly sets a high-quality swing check valve apart? How do you choose the right one for your specific needs? With over two decades of experience in valve manufacturing, Waits Valve Co., Ltd. is here to break down everything you need to know.

A swing check valve is a type of check valve that uses a hinged disc to allow fluid to flow in one direction while automatically blocking reverse flow. Its simple yet effective design makes it a popular choice for a wide range of applications, from water supply and wastewater treatment to oil, gas, and chemical processing.

Key Features & Benefits

• Automatic Operation: The valve opens and closes based on flow pressure, requiring no manual intervention.

• Low Pressure Drop: The swinging disc design minimizes obstruction, ensuring efficient flow.

• Durability: Built from robust materials to withstand high pressures and corrosive environments.

• Versatility: Suitable for horizontal and vertical installations (with specific models).

Detailed Product Parameters

To help you make an informed decision, we've compiled the key specifications of our premium swing check valves. Below is a summary of our standard and custom-ready models.

Materials of Construction

• Body: Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel (304, 316), Brass

• Disc: Stainless Steel, Bronze, or PTFE-Coated for enhanced corrosion resistance

• Seat: Buna-N, EPDM, Viton, or Metal-to-Metal

• Hinge Pin: Stainless Steel for longevity and minimal wear

Pressure and Temperature Ratings

• Pressure Range: Class 125 to Class 600 (up to 1440 PSI)

• Temperature Range: -20°F to 400°F (-29°C to 204°C), depending on seat material

Sizes and End Connections

• Size Range: 2″ to 24″ (larger sizes available upon request)

• End Types: Flanged (ANSI, DIN, JIS), Threaded (NPT, BSP), Wafer-style

Standards and Certifications

• API 594, API 6D, ASME B16.34

• ISO 9001:2015 Certified Manufacturing

Technical Specifications Table

Frequently Asked Questions 

Q: Can a swing check valve be installed in vertical pipelines?
A: Yes, but only if the flow direction is upward. In downward flow vertical installations, the disc may fail to close properly due to gravity. For vertical lines, we recommend consulting with our engineers at Waits Valve Co., Ltd. to select a model with a spring-assisted disc or to explore alternative check valve types.

Q: What causes water hammer in swing check valves, and how can it be prevented?
A: Water hammer occurs when the valve disc slams shut due to sudden flow reversal. This is often caused by high flow velocity or rapid pump shutdown. To mitigate this, choose a valve with a lightweight disc or a soft-closing mechanism. Waits Valve offers models with lever-and-weight or spring-assisted designs to ensure gradual closing and reduce shock.

Q: How often do swing check valves require maintenance?
A: Under normal conditions, swing check valves are low-maintenance. However, periodic inspections are recommended—especially in abrasive or corrosive services. Check for wear on the disc, hinge pin, and seat every 12-18 months. Valves from Waits Valve Co., Ltd. are designed for easy in-line maintenance, reducing downtime and costs.

Why Choose Waits Valve Co., Ltd.?

With 15 years of expertise in valve manufacturing, Waits Valve Co., Ltd. combines precision engineering with rigorous quality control. Our swing check valves are trusted in industries worldwide for reliability, performance, and longevity. We offer custom solutions tailored to your operational needs, ensuring you get the perfect valve for your system.

Ready to enhance your pipeline performance? Contact Waits Valve Co., Ltd. today for a quote or technical support. Let us help you find the ideal swing check valve solution!