Ball valve internal structure

The internal structure of the ball valve is relatively simple and well-designed, mainly composed of the following key components:

First, the sphere

Function: As a ball valve opening and closing parts, the middle of the ball with a channel, through rotation to control the media on and off.

Material: The sphere material is diverse, commonly used stainless steel, copper, cast iron, etc., to adapt to different working environments and media requirements.

Features: The surface of the ball is usually specially treated (such as polishing) to improve sealing performance, and can withstand high pressure and temperature.

Second, valve seat

Function: The seat is the positioning device of the ball, which is combined with the ball to form a seal and prevent the leakage of the medium.

Material: Valve seat material variety, including metal, rubber, PTFE, etc., according to the characteristics of the medium and the working environment.

Features: The design of the seat is reasonable, which can ensure that the ball is tightly fitted with the seat during rotation, forming a reliable seal.

Third, the valve stem

Function: The valve stem is the part that connects the ball and the operating mechanism, and drives the ball to rotate by rotating the valve stem.

Material: The stem material is usually matched to the ball to ensure adequate strength and corrosion resistance.

Features: The valve stem design is reasonable, the transmission is flexible, and can withstand a certain operating torque.

Fourth, operating mechanism

Function: The operating mechanism is used to control the rotation of the valve stem, so as to realize the opening and closing of the ball valve.

Type: including manual operation mechanism (such as handle, gear, etc.) and automatic operation mechanism (such as motor, pneumatic device, etc.).

Features: Manual operation mechanism is simple and intuitive, suitable for small diameter ball valve; The automatic operating mechanism can realize remote control and automatic control, which is suitable for large diameter and complex working conditions of ball valves.

Fifth, other components

Bearings: Some ball valves also have bearings inside to support the ball and reduce friction during rotation.

Seals: In addition to the seat, the ball valve may also have other internal seals (such as O-rings, fillers, etc.) to further improve the sealing performance.

Springs: In some ball valve designs, springs are used to assist in sealing or to provide preload.

Sixth, the overall structure characteristics

Simple structure: The internal structure of the ball valve is relatively simple, fewer parts, easy to manufacture and maintain.

Good sealing: Through the tight fit of the ball and the seat, the ball valve can achieve good sealing performance.

Easy operation: The opening and closing of the ball valve only need to rotate 90 degrees, easy and quick operation.

Wide range of application: Ball valve is suitable for a variety of media and working conditions, including high temperature, high pressure, corrosive media, etc.

In summary, the ball valve has a compact internal structure and reasonable design, which can meet the fluid control needs under various working conditions.