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

Introduction to Manual Butterfly Valves

Manual butterfly valves are essential components in fluid control systems, offering a reliable and cost-effective solution for regulating media flow in pipelines. Unlike automated counterparts such as **pneumatic actuator butterfly valves** or **electric actuator butterfly valves**, manual butterfly valves rely on direct human operation through mechanisms like **lever-operated** or **gear-operated** systems. This article provides an in-depth analysis of their functionality, technical specifications, applications, and the company behind this critical industrial component: **Ningjin Thriveon Valve Co., Ltd.**

Key Features and Advantages

Manual butterfly valves are renowned for their **simple structure**, **lightweight design**, and **ease of installation**. These attributes make them particularly suitable for applications where automation is unnecessary or cost-prohibitive. According to industry standards, manual valves are often preferred in scenarios requiring **manual intervention** or **low-frequency operation**.

Advantages of Manual Butterfly Valves:

• Cost-Effective: Reduced complexity translates to lower manufacturing and maintenance costs.
• Compact Design: Minimal space requirements due to their streamlined construction.
• Reliable Operation: Fewer moving parts reduce the likelihood of mechanical failure.
• Easy Maintenance: Simple disassembly and reassembly processes for routine servicing.

Technical Specifications

The following table outlines the critical technical parameters of manual butterfly valves, highlighting their material composition, pressure ratings, and compliance with international standards:

Parameter	Details
Body Materials	Grey Cast Iron, Ductile Cast Iron, Stainless Steel 304/316, Carbon Steel
Disc Materials	Ductile Cast Iron (Nickel-plated/Nylon-coated), Stainless Steel 304/316, Aluminum Bronze
Stem Materials	Stainless Steel 410/416/304/316
Seat Materials	EPDM, BUNA-N, PTFE, Viton, Hypalon, Neoprene, Metal Seated
Pressure Ratings	CLASS 125/150, PN10/16/25, 5K/10K/16K
Standards Compliance	API 609, BS5155, MSS SP-67/68, EN593

Applications and Industry Use Cases

Manual butterfly valves are widely used across diverse industries, including water treatment, chemical processing, HVAC systems, and oil & gas. Their adaptability to various media—such as water, steam, and corrosive chemicals—makes them a versatile choice for engineers and technicians. For instance, **manual wafer butterfly valves** are commonly employed in **low-pressure water supply systems**, while **manual exhaust butterfly valves** are critical in **ventilation and fume extraction** applications.

Common Applications:

• Water Treatment Plants: Controlling flow in filtration and distribution systems.
• Industrial Pipelines: Regulating media flow in chemical and petrochemical facilities.
• HVAC Systems: Managing air and coolant circulation in commercial buildings.
• Waste Management: Controlling sludge and wastewater flow.

Installation Guidelines

Proper installation is crucial for ensuring the optimal performance of manual butterfly valves. The following steps, based on manufacturer recommendations, outline the correct procedure:

1. Flange Alignment: Ensure flanges are spaced to allow the valve to pass easily. The disc should be in a half-open position during installation.
2. Flange Gaskets: Avoid using gaskets between flanges to prevent misalignment.
3. Bolt Placement: Insert all bolts with the disc in a half-open position. Do not tighten the nuts immediately.
4. Final Tightening: Fully open the valve to verify pipeline alignment, then tighten the nuts securely.

FAQ: Common Questions About Manual Butterfly Valves

1. What is a Manual Butterfly Valve?

A manual butterfly valve is a type of **hand-operated valve** that uses a lever or gear mechanism to control flow. It includes **lever-operated butterfly valves** and **gear-operated butterfly valves**. Unlike **pneumatic actuator butterfly valves**, manual valves require direct human intervention for operation.

2. What Are the Advantages of Manual Butterfly Valves?

Manual butterfly valves offer a **simple structure**, **small volume**, and **lightweight design**, making them easy to install and maintain. Their **cost-effectiveness** and **reliability** are particularly beneficial in applications where automation is not required.

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 manufacturer of industrial valves, specializing in **manual butterfly valves** and related components. With a commitment to quality and innovation, the company adheres to international standards such as **API 609** and **EN593** to ensure the durability and performance of its products. Their expertise in **manual butterfly valve manufacturing** has established them as a trusted partner for clients worldwide.

For more information about their product range, visit the official website: Manual Butterfly Valve Page.

Industry Standards and Regulatory Compliance

Manual butterfly valves are designed to meet rigorous industry standards. For example, the **National Institute of Standards and Technology (NIST)** provides guidelines for **fluid control systems** and **material testing** that ensure the safety and efficiency of such components. According to NIST, valves must undergo **pressure testing** and **material certification** to guarantee their performance under varying conditions. ^[1]

Conclusion

Manual butterfly valves remain a cornerstone of modern fluid control systems due to their simplicity, reliability, and cost-effectiveness. Whether used in **water treatment**, **HVAC**, or **industrial pipelines**, these valves are engineered to deliver consistent performance. As a manufacturer, **Ningjin Thriveon Valve Co., Ltd.** continues to innovate, ensuring their products meet the highest standards of quality and compliance.

References

^[1] National Institute of Standards and Technology (NIST). "Fluid Control System Standards." https://www.nist.gov/