Cast Iron Wafer Type Butterfly Valve , PTFE Butterfly Valve Cast Iron

Standard Manual Operated Butterfly Valve 

Manual Butterfly Valve Introduction

A manual butterfly valve is a type of valve used to regulate and control the flow of fluids (liquids, gases, or slurries) in a pipeline system. It consists of a circular disc or vane that rotates around a central axis in order to open or close the valve. When the valve is fully open, the disc is positioned parallel to the direction of flow, allowing maximum flow through the pipeline. When the valve is fully closed, the disc is perpendicular to the direction of flow, preventing any flow through the pipeline.

The "butterfly" in the name comes from the shape of the disc, which is typically thin and flat, with a shape resembling that of a butterfly. The valve is operated manually using a handle or lever that is attached to the disc, which can be turned to control the position of the disc and therefore the flow of the fluid.

Manual Butterfly Valve Principle

The principle of a manual butterfly valve is based on the rotation of a circular disc or vane within a pipeline to control the flow of fluid. The valve consists of a disc that is mounted on a central axis and can be rotated by a handle or lever. When the handle is turned, the disc rotates around the axis, changing its position relative to the fluid flowing through the pipeline.

When the valve is fully open, the disc is positioned parallel to the direction of flow, allowing maximum flow through the pipeline. When the valve is partially closed, the disc is at an angle to the flow, reducing the flow rate. When the valve is fully closed, the disc is perpendicular to the flow, completely blocking the flow of fluid.

The design of the valve allows for quick and easy operation, with the ability to regulate and control flow rates with precision. The butterfly valve is also compact and lightweight, making it a popular choice for applications where space is limited or weight restrictions apply.

Application scope

Manual butterfly valves are commonly used in a variety of industries, including chemical processing, oil and gas, water and wastewater treatment, and food and beverage processing. They are often preferred over other types of valves because they are lightweight, compact, and require minimal maintenance.

Manual Butterfly Valve Parameter Table

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