Manual Butterfly Valve-Ningjin Thriveon Valve|Low-Cost&Easy Installation

**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 their functionality, technical specifications, applications, and the company behind this critical equipment. By understanding the nuances of **manual butterfly valves**, users can make informed decisions about their implementation in various industrial settings.

**Understanding Manual Butterfly Valves**

**Manual Butterfly Valves** are a type of quarter-turn valve operated by hand, typically through a lever or gear mechanism. Unlike **pneumatic** or **electric actuators**, these valves rely on direct human interaction for operation. The **lever-operated** and **gear-operated** variants are the most common, each offering distinct advantages depending on the application requirements. According to the **NIST (National Institute of Standards and Technology)**, manual valves are often preferred in scenarios where simplicity and low maintenance are critical factors (NIST Reference).

**Key Features of Manual Butterfly Valves**

• Simple Structure: The mechanical design minimizes the risk of failure and reduces maintenance costs.
• Compact Design: Smaller size and lighter weight make them ideal for space-constrained environments.
• Cost-Effective: Lower initial investment compared to automated systems.
• Easy Installation: As outlined in the installation guidelines, the process is straightforward and requires minimal tools.

**Material Composition and Pressure Ratings**

The **materials** used in **manual butterfly valves** are chosen for their durability and compatibility with different media. 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.

The **pressure ratings** of these valves are standardized to ensure compatibility with various systems. They typically support:

• CLASS 125/150
• PN10/16/25
• 5K/10K/16K

**Technical Specifications Table**

Parameter	Details
Drive Types	Lever-operated, Gear-operated
Materials	Grey Cast Iron, Ductile Cast Iron, Stainless Steel, Carbon Steel
Pressure Ratings	CLASS 125/150, PN10/16/25, 5K/10K/16K
Standards Compliance	API 609, BS5155, MSS SP-67/68, EN593
Installation Requirements	Flange alignment, no gaskets between flanges, bolts tightened after full opening

**Applications and Industry Use Cases**

**Manual Butterfly Valves** are widely used across industries due to their versatility. Key applications include:

• Water Treatment: Controlling flow in municipal water supply systems.
• HVAC Systems: Regulating air and water flow in heating and cooling systems.
• Chemical Processing: Managing corrosive fluids with appropriate material selections.
• Oil and Gas: Isolating pipelines during maintenance or emergency shutdowns.

**Advantages of Manual Butterfly Valves**

Compared to **pneumatic** or **electric actuators**, **manual butterfly valves** offer several benefits:

• Lower Cost: No need for external power sources or complex control systems.
• Reliability: Fewer moving parts reduce the likelihood of mechanical failure.
• Quick Maintenance: Simple design allows for easy inspection and repair.
• Energy Efficiency: No energy consumption during operation.

**Installation Guidelines**

Proper installation is crucial for optimal performance. Follow these steps:

1. Flange Alignment: Ensure flanges are spaced to allow the valve to pass easily with the disc in a half-opened position.
2. No Gaskets: Avoid placing gaskets between flanges to prevent misalignment.
3. Bolt Placement: Insert all bolts with the disc in a half-opened position, but do not tighten the nuts immediately.
4. Final Tightening: Open the valve fully to verify pipeline alignment, then tighten the nuts.

**Company Background: Ningjin Thriveon Valve Co., Ltd.**

**Ningjin Thriveon Valve Co., Ltd.**, based in Hebei, China, is a leading manufacturer of **manual butterfly valves** and other industrial valve solutions. With a focus on quality and innovation, the company has established itself as a trusted supplier in the global market. Their commitment to **compliance with international standards** ensures that their products meet the highest performance and safety requirements (Company Website).

**Frequently Asked Questions (FAQ)**

Q1: What is a Manual Butterfly Valve?

A: A **manual butterfly valve** is a type of valve operated by hand, typically using a lever or gear mechanism. It is designed for applications where manual control is sufficient, offering a simple and cost-effective solution. For more details, visit the gear-operated butterfly valve page.

Q2: What are the Advantages of Manual Butterfly Valves?

A: **Manual butterfly valves** are easy to install, have a simple structure, and are lightweight. These features make them ideal for applications requiring minimal maintenance and quick adjustments.

**Conclusion**

**Manual Butterfly Valves** remain a cornerstone of fluid control systems due to their simplicity, reliability, and cost-effectiveness. Whether in **water treatment**, **HVAC**, or **chemical processing**, these valves provide a dependable solution for a wide range of applications. By understanding their technical specifications and advantages, users can confidently select the right valve for their needs. For more information, explore the comprehensive range of **manual butterfly valves** offered by **Ningjin Thriveon Valve Co., Ltd.** (Product Page).

**References**

NIST (National Institute of Standards and Technology) - Reference for industry standards and technical guidelines.