Manual Butterfly Valve-Ningjin Thriveon Valve Co., Ltd.|Manual Operation, Durable Design

**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. Designed for manual operation, these valves are widely used across various industries due to their simplicity, durability, and ease of installation. This article provides an in-depth analysis of the **Manual Butterfly Valve**, covering its key features, technical specifications, applications, and the company behind its production. Additionally, we explore the importance of standards in valve manufacturing, referencing the work of the **National Institute of Standards and Technology (NIST)** to highlight the significance of precision in industrial components.

Key Features of Manual Butterfly Valves

**Manual Butterfly Valves** are characterized by their straightforward design and manual operation. Unlike **pneumatic** or **electric actuator** valves, these valves are operated using a lever or gear mechanism, making them ideal for applications where automation is unnecessary. The **Manual Butterfly Valve** is available in various configurations, including **hand-operated**, **gear-operated**, and **wafer-type** designs, catering to diverse operational needs.

One of the primary advantages of **Manual Butterfly Valves** is their **simple structure**, which reduces maintenance requirements and ensures long-term reliability. The **Manual Operated Butterfly Valve** is also noted for its **compact size** and **lightweight**, making it easy to install in tight spaces. Additionally, these valves are available with **limit switches** for enhanced control, although the **Manual Butterfly Valve with Limit Switch** is typically used in applications requiring precise flow regulation.

Material Composition

The **Manual Butterfly Valve** is constructed using high-quality materials to ensure durability and performance. Common materials include:

• Body: Grey Cast Iron, Ductile Cast Iron, Stainless Steel 304/316, Carbon Steel
• Disc: Ductile Cast Iron (Nickel-plated or 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

These materials are selected to withstand a wide range of operating conditions, including varying temperatures and pressures, ensuring the **Manual Butterfly Valve** remains functional in demanding environments.

Technical Specifications

Parameter	Details
Pressure Ratings	CLASS 125/150; PN10/16/25; 5K/10K/16K
Standards Compliance	API 609; BS5155; MSS SP-67/68; EN593
Installation Guidelines	Space out the flanges for easy valve passage with the disc in a half-opened position. Avoid fitting gaskets between the flanges. Secure all bolts with the disc in a half-opened position, then tighten the nuts after fully opening the valve.

Applications of Manual Butterfly Valves

**Manual Butterfly Valves** are widely used in industries such as **water treatment**, **chemical processing**, **HVAC systems**, and **oil and gas**. Their versatility makes them suitable for both **low-pressure** and **high-pressure** applications. For instance, the **Manual Exhaust Butterfly Valve** is commonly used in **ventilation systems** to regulate airflow, while the **Manual Wafer Butterfly Valve DN150** is ideal for **pipeline systems** requiring a compact and lightweight solution.

These valves are also employed in **food and beverage processing**, where **stainless steel** components ensure **hygienic operation**. The **Manual Butterfly Valve Manufacturer** ensures that each product meets industry-specific requirements, such as **corrosion resistance** and **temperature tolerance**.

Installation and Maintenance

Proper installation is critical to the performance of **Manual Butterfly Valves**. The following steps are recommended:

1. Ensure the flanges are spaced to allow the valve to pass through easily, with the disc in a half-opened position.
2. Do not install gaskets between the flanges to prevent leaks.
3. Secure all bolts with the disc in a half-opened position, and tighten the nuts after fully opening the valve to verify alignment.

Regular maintenance, such as lubrication of the **stem** and inspection of the **seat**, ensures the longevity of the valve. The **Manual Butterfly Valve Manufacturer** provides detailed guidelines for **maintenance and troubleshooting**, emphasizing the importance of **routine checks** to prevent operational failures.

Frequently Asked Questions (FAQs)

1. What is a Manual Butterfly Valve?

A **Manual Butterfly Valve** is a type of valve operated manually using a lever or gear mechanism. It includes **lever-operated** and **gear-operated** variants, as detailed in the **Gear Operated Butterfly Valve** section.

2. What are the Advantages of Manual Butterfly Valves?

**Manual Butterfly Valves** offer **convenient installation**, a **simple structure**, and a **compact design**. Their **lightweight** and **cost-effective** nature make them a preferred choice for many industrial applications.

About Ningjin Thriveon Valve Co., Ltd.

**Ningjin Thriveon Valve Co., Ltd.** (河北赢达金属管业有限公司) is a leading **Manual Butterfly Valve Manufacturer** specializing in the production of high-quality **Manual Butterfly Valves**. With a commitment to **precision engineering** and **customer satisfaction**, the company provides **manual butterfly valve manufacturers** with a wide range of solutions tailored to specific industry needs.

As a **Manual Butterfly Valve Manufacturer**, Ningjin Thriveon ensures that its products meet international standards, including **API 609** and **EN593**, as outlined in the **Product Page**. The company's dedication to **innovation** and **quality control** has established it as a trusted partner for businesses worldwide.

Conclusion

**Manual Butterfly Valves** are indispensable in modern industrial systems, offering a balance of **simplicity**, **durability**, and **cost-effectiveness**. Their **manual operation** makes them ideal for applications where automation is not required, while their **technical specifications** ensure compatibility with a wide range of environments. By adhering to industry standards and leveraging advanced manufacturing techniques, **Ningjin Thriveon Valve Co., Ltd.** continues to set benchmarks in the **Manual Butterfly Valve** market.

For more information on **Manual Butterfly Valves**, visit the **Manual Butterfly Valve Page** or explore the **Gear Operated Butterfly Valve** for advanced control options.

References

This article incorporates information from the **National Institute of Standards and Technology (NIST)**, which plays a critical role in developing standards and measurements that underpin industrial innovation. For further details on NIST's contributions to precision engineering, visit their official website.