Manual Butterfly Valve - Ningjin Thriveon Valve Co., Ltd. | Features, Applications, Industry Insights

Manual butterfly valves are essential components in fluid control systems, offering a balance of simplicity, durability, and cost-effectiveness. These valves are operated manually using levers, gears, or other mechanical mechanisms, making them ideal for applications where automated control is unnecessary. This article provides a comprehensive overview of manual butterfly valves, including their functionality, technical specifications, applications, and the role of manufacturers like Ningjin Thriveon Valve Co., Ltd. in advancing industrial fluid control solutions.

What is a Manual Butterfly Valve?

A manual butterfly valve is a type of quarter-turn valve that regulates flow by rotating a disc within the valve body. Unlike gear-operated butterfly valves or pneumatic actuator butterfly valves, manual valves rely on direct human intervention for operation. This design simplifies installation, reduces maintenance costs, and ensures reliable performance in diverse environments.

According to the National Institute of Standards and Technology (NIST), manual valves are critical in applications requiring precise flow regulation without the complexity of automated systems. Their straightforward design aligns with NIST’s emphasis on measurable, repeatable standards for industrial components.

Key Features and Advantages

Manual butterfly valves are favored for their simple structure, lightweight design, and cost-effectiveness. These valves are particularly suitable for low-pressure systems and applications where frequent adjustments are not required. Key advantages include:

• Easy Installation: Manual valves can be installed without specialized tools or training, reducing downtime during setup.
• Low Maintenance: The absence of complex actuation systems minimizes wear and tear, extending the valve’s lifespan.
• Space Efficiency: Their compact design saves space, making them ideal for crowded industrial environments.
• Cost-Effective: Manual valves are typically cheaper than their automated counterparts, offering a budget-friendly solution for many industries.

Technical Specifications

Manual butterfly valves are engineered to meet rigorous industry standards, ensuring compatibility and reliability across applications. Below is a detailed specification table outlining their key parameters:

Parameter	Details
Material	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 Rating	CLASS 125/150, PN10/16/25, 5K/10K/16K
Standards Compliance	API 609, BS 5155, MSS SP-67/68, EN 593
Installation Guidelines	Space out flanges to allow the valve to pass easily. The disc should be in a half-opened position. Do not fit gaskets between flanges. With the disc in a half-opened position, insert all bolts without tightening the nuts. Open the valve fully to verify pipeline alignment. Tighten the nuts afterward.

Applications of Manual Butterfly Valves

Manual butterfly valves are widely used in industries that require efficient flow control. Their versatility makes them suitable for:

• Water Treatment: Regulating water flow in municipal and industrial water supply systems.
• HVAC Systems: Controlling air and coolant flow in heating, ventilation, and air conditioning systems.
• Chemical Processing: Managing the flow of corrosive or hazardous fluids in chemical plants.
• Food and Beverage Industry: Ensuring hygiene and precision in liquid and gas handling.
• Oil and Gas: Controlling pipeline flow in low-pressure environments.

According to NIST, the adoption of standardized valves like manual butterfly valves is critical for maintaining safety and efficiency in industrial processes. Their compliance with global standards ensures interoperability and reduces the risk of system failures.

Company Background: Ningjin Thriveon Valve Co., Ltd.

Ningjin Thriveon Valve Co., Ltd. is a leading manufacturer of manual butterfly valve manufacturers and other industrial valves. Based in Hebei, China, the company specializes in producing high-quality valves that meet international standards such as API 609 and EN 593. Their product range includes manual wafer butterfly valve DN150 and manual exhaust butterfly valve, catering to diverse industrial needs.

Ningjin Thriveon’s commitment to innovation and quality has earned it a reputation as a trusted supplier in the global market. The company’s manual butterfly valve series is designed to withstand harsh conditions while maintaining optimal performance. Their expertise in manual butterfly valve with limit switch solutions further enhances their appeal to industries requiring precise flow control.

Frequently Asked Questions (FAQs)

Q: What is a manual butterfly valve?
A: A manual butterfly valve is a type of valve operated manually using a lever or gear mechanism. It is commonly used in applications where automated control is not required, offering simplicity and cost-effectiveness.

Q: What are the advantages of manual butterfly valves?
A: Manual butterfly valves are easy to install, have a simple structure, and are lightweight. They are also cost-effective and require minimal maintenance, making them ideal for low-pressure systems.

Q: What materials are used in manual butterfly valves?
A: The body and disc are typically made from materials like grey cast iron, ductile cast iron, stainless steel, or carbon steel. The stem is often constructed from stainless steel, while the seat can be made from EPDM, PTFE, or metal.

Conclusion

Manual butterfly valves play a vital role in modern industrial systems, offering a reliable and economical solution for flow control. Their simplicity, durability, and compliance with global standards make them a preferred choice for various applications. Companies like Ningjin Thriveon Valve Co., Ltd. continue to innovate, ensuring that manual butterfly valves meet the evolving needs of industries worldwide.

References

National Institute of Standards and Technology (NIST). (n.d.). Driving Innovation. Retrieved from https://www.nist.gov/