Manual Butterfly Valve-Ningjin Thriveon Valve Co., Ltd.|Simple Design&Reliable Performance

Butterfly valves are essential components in fluid control systems, offering a balance of efficiency, durability, and cost-effectiveness. Among the various types, the **manual butterfly valve** stands out for its simplicity and reliability. This article delves into the functionality, advantages, technical specifications, and applications of manual butterfly valves, while also exploring the company behind this innovative product: **Ningjin Thriveon Valve Co., Ltd.**

Understanding Manual Butterfly Valves

A **manual butterfly valve** is a type of quarter-turn valve that uses a disc to control the flow of fluids. Unlike **pneumatic** or **electric actuator** butterfly valves, manual valves are operated by hand, typically through a lever or gear mechanism. This simplicity makes them ideal for applications where automated control is unnecessary or cost-prohibitive.

As explained in the product page, manual butterfly valves are categorized into two main types: lever-operated and gear-operated. Both rely on manual input, but gear-operated valves offer enhanced torque for larger or higher-pressure systems.

Key Advantages of Manual Butterfly Valves

Manual butterfly valves are favored for their simple structure, lightweight design, and ease of installation. According to the FAQ section, these valves are particularly convenient for applications requiring frequent manual adjustments. Their compact size also reduces the space required for installation, making them suitable for tight environments.

One of the primary benefits of manual valves is their low maintenance cost. Since they lack complex actuation systems, they are less prone to mechanical failures. This makes them a cost-effective solution for industries such as water treatment, HVAC, and chemical processing.

Technical Specifications and Material Compatibility

The performance of a manual butterfly valve is heavily influenced by its materials and pressure ratings. Below is a detailed breakdown of the specifications:

Component	Materials
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
Pressure Ratings	CLASS 125/150, PN10/16/25, 5K/10K/16K

The materials used in manual butterfly valves are selected to ensure compatibility with various fluids and operating conditions. For instance, stainless steel is often used in corrosive environments, while EPDM seats provide excellent resistance to weathering and ozone.

Standards and Applications

Manual butterfly valves adhere to international standards such as API 609, BS5155, MSS SP-67/68, and EN593. These standards ensure that the valves meet rigorous requirements for safety, performance, and durability. According to the product specifications, these valves are widely used in industries requiring precise flow control, including:

• Water and wastewater treatment
• Industrial cooling systems
• Chemical and petrochemical processing
• HVAC systems
• Food and beverage production

The installation process for manual butterfly valves is straightforward, as outlined in the installation guidelines:

1. Space out the flanges to allow the valve to pass easily. The disc should be in a half-opened position.
2. Avoid fitting gaskets between the flanges.
3. Place all bolts with the disc in a half-opened position, but do not tighten the nuts yet.
4. Open the valve fully to verify pipeline alignment, then tighten the nuts.

Comparing Manual and Actuated Butterfly Valves

While manual butterfly valves are cost-effective and simple, they are not suitable for all applications. Pneumatic and electric actuator valves offer automated control, which is essential for large-scale or high-precision systems. However, manual valves excel in scenarios where human intervention is feasible and preferred.

According to NIST standards (referenced in the NIST website), manual valves are often used in low-risk environments where manual operation is practical. For more complex systems, actuators provide greater efficiency and safety.

About Ningjin Thriveon Valve Co., Ltd.

As a leading manufacturer of industrial valves, **Ningjin Thriveon Valve Co., Ltd.** specializes in producing high-quality **manual butterfly valves** that meet global standards. The company's commitment to innovation and precision has earned it a reputation as a trusted supplier in the valve industry.

With a focus on manual wafer butterfly valve DN150 and other specialized models, Ningjin Thriveon ensures that its products are tailored to diverse industrial needs. Their product catalog includes a wide range of valves, from manual exhaust butterfly valves to manual butterfly valves with limit switches.

Conclusion

Manual butterfly valves are a reliable and cost-effective solution for fluid control systems. Their simple design, ease of installation, and compatibility with various materials make them a popular choice across industries. For those seeking a manual butterfly valve manufacturer that prioritizes quality and innovation, Ningjin Thriveon Valve Co., Ltd. offers a comprehensive range of products to meet diverse requirements.

References

1. NIST Standards for Industrial Valves

2. Manual Butterfly Valve Product Page

3. Ningjin Thriveon Valve Co., Ltd. Website

Disclaimer: This article is based on information provided by Ningjin Thriveon Valve Co., Ltd. and does not constitute an endorsement of NIST standards. For detailed technical specifications, please refer to the official product documentation.