Manual Butterfly Valve-Ningjin Thriveon Valve Co., Ltd.|Simple Structure&Cost-Effective

Manual butterfly valves are essential components in fluid control systems, offering a reliable and cost-effective solution for regulating the flow of liquids and gases. This article provides an in-depth analysis of the manual butterfly valve, covering its technical specifications, advantages, and real-world applications. The information is supported by industry standards and insights from authoritative sources like the National Institute of Standards and Technology (NIST).

Product Overview: What is a Manual Butterfly Valve?

A manual butterfly valve is a type of quarter-turn valve that uses a disc to control flow. Unlike automated systems that rely on actuators like pneumatic or electric mechanisms, manual valves are operated manually via a lever or gear. This simplicity makes them ideal for applications where cost, ease of maintenance, and reliability are critical.

Manual butterfly valves are commonly used in industrial, commercial, and residential settings. They are available in various configurations, including gear-operated and lever-operated designs, each suited for specific operational needs.

Key Features and Advantages

Manual butterfly valves offer several advantages that make them a preferred choice in many industries:

• Simple Structure: The absence of complex actuation systems reduces the likelihood of mechanical failure.
• Lightweight and Compact: Their design allows for easy installation and minimal space requirements.
• Cost-Effective: Lower manufacturing and maintenance costs compared to automated alternatives.
• Quick Operation: A 90-degree rotation of the handle allows for rapid flow control.

According to NIST, the reliability of manual valves is often attributed to their straightforward design, which minimizes the risk of operational errors. This aligns with industry standards such as API 609 and EN 593, which emphasize the importance of simplicity in valve design for critical applications.

Technical Specifications and Material Composition

The performance of manual butterfly valves is influenced by their material composition and pressure ratings. The following table outlines the key technical specifications:

Component	Materials
Body	Grey Cast Iron, Ductile Cast Iron, Stainless Steel 304/316, Carbon Steel
Disc	Ductile Cast Iron (Nickel-plated/Nylon coated), Stainless Steel 304/316, Aluminum Bronze
Stem	Stainless Steel 410/416/304/316
Seat	EPDM, BUNA-N, PTFE, Viton, Hypalon, Neoprene, Metal Seated
Pressure Ratings	CLASS 125/150, PN10/16/25, 5K/10K/16K

The materials used in manual butterfly valves are selected based on the operating environment. For example, stainless steel is often used in corrosive environments, while ductile cast iron offers durability in high-pressure systems. The NIST highlights the importance of material selection in ensuring the longevity and safety of fluid control systems.

Installation and Operational Guidelines

Proper installation is critical to the performance of manual butterfly valves. The following steps are recommended:

1. Flange Alignment: Ensure flanges are spaced to allow the valve to pass easily, with the disc in a half-opened position.
2. Gasket Placement: Avoid using gaskets between flanges to prevent misalignment.
3. Bolt Installation: Insert bolts with the disc in a half-opened position and tighten them after verifying pipeline alignment.

These guidelines are aligned with standards such as BS 5155 and MSS SP-67/68, which provide detailed protocols for valve installation and maintenance.

Applications Across Industries

Manual butterfly valves are versatile and find applications in a wide range of sectors, including:

• Water Treatment: Regulating flow in municipal water supply systems.
• Oil and Gas: Controlling fluid flow in pipelines and storage tanks.
• Chemical Processing: Managing corrosive substances in industrial plants.
• HVAC Systems: Adjusting airflow in ventilation systems.

According to NIST, the adaptability of manual valves makes them suitable for both low- and high-pressure environments, provided they are selected according to the specific requirements of the application.

Company Background: Ningjin Thriveon Valve Co., Ltd.

The manual butterfly valve is manufactured by Ningjin Thriveon Valve Co., Ltd., a leading supplier of industrial valves based in Hebei, China. With years of experience, the company specializes in producing high-quality valves that meet international standards such as API 609 and EN 593.

Ningjin Thriveon Valve Co., Ltd. is committed to innovation and customer satisfaction, offering a wide range of products including manual butterfly valves, gear-operated butterfly valves, and manual exhaust butterfly valves. Their products are widely used in industries such as energy, manufacturing, and infrastructure.

Conclusion

Manual butterfly valves are a cornerstone of modern fluid control systems, offering a balance of simplicity, durability, and cost-effectiveness. By adhering to industry standards and leveraging high-quality materials, manufacturers like Ningjin Thriveon Valve Co., Ltd. ensure that their products meet the demands of diverse applications. For more information on manual butterfly valves, visit the official website or contact the company directly.

References

National Institute of Standards and Technology (NIST) (2025). "Standards for Fluid Control Systems." Retrieved from https://www.nist.gov.