Ball Valves Are Sorted by Structure

Ball valve according to the structure can be divided into floating ball valve, fixed ball valve, flexible ball valve.

Floating ball valve structure is simple, good sealing, but the ball load all passed to the export seal, we should consider whether the sealing ring material can withstand the work of the ball media load. This structure is widely used in medium and low pressure ball valves.

For the fixed ball valve, ball of the ball is fixed, fixed ball valve has a floating seat, the valve seat has movement, so that the seal on the ball to ensure that the seal. Suitable for high pressure and large diameter valves.

For the flexible ball valve, the ball of the ball is elastic. Spherical and valve seat seals are made of metal materials, sealing pressure is very large, relying on the pressure of the medium itself has been less than the requirements of the seal. This valve is suitable for high temperature and high pressure medium. 

What Are The Advantages of Cast Steel Ball Valve?

Cast steel ball valve works by rotating the valve to make the valve open or close. Ball valve has light switch, small size, simple structure, in various industries have been widely used. Cast steel ball valve opening and closing parts driven by the stem, and around the axis of the stem for the rotation of the valve. Particularly suitable for fiber, micro-solid particles and other media. So, what are the advantages of cast steel ball valve?

1.easy to operate, open and close quickly, from full open to full clearance as long as the rotate 90 °, easy to remote control.

2.simple structure, small size, light weight.

3.In the case of full open or fully close, the ball and the sealing surface is isolated with media, it will not cause the valve sealing surface erosion.

4.a wide range of applications, from high vacuum to high pressure can be applied.

5.use advanced technology and high-quality materials to manufacture, high efficiency, long service life.

6.The current ball valve sealing surface material widely used plastic, good sealing, the vacuum system has also been widely used.

Types of Valves in Water Supply System

The valve, commonly utilized in water supply system, includes gate valve , globe valve , check valve, butterfly valve, etc.

Gate valve: Gate valve has small fluid resistance, small force. It allows fluid to flow in any directions. But gate valve has complicated structure. Sealing face of gate valve is easily polished by impurities or particles in water. When gate valve is usually opened, the disc may fall off, result system losing control.

Globe valve: Compared with gate valve, gate valve has simple structure, good sealing, and convenient maintenance. However, the force is larger than gate valve.

Butterfly valve: Butterfly valve can be opened or closed completely. Butterfly valve has small volume, light weight though it has large force. 

Check valve: It is mainly used to avoid back flow.Commonly utilized check valve is lift check valve and swing check valve.

The Main Reasons for The Failure of The Floating Ball Valve

Low-pressure floating ball valve is a low-pressure liquid level to control the amount of liquid into the control valve, it is combined with the following evaporative coil into a throttle and evaporator combination, float ball and valve needle is consist of lever, hinge connected into the liquid control valve. When the liquid level drops, the float drops, the valve needle is opened, the liquid volume increases. When the liquid level rises, the float rises with the liquid level, and the small valve is closed, the liquid level is reduced. So the float valve make the change of the liquid level as the power to adjust the flow.

In summary, the main reason for the failure of the float valve is due to frequent fluctuations of the liquid level inside the container, so the float valve opening and closing frequent, spool and seat is easy to wear and cause failure.

Working Principle of Cast Steel Ball Valve

Cast steel ball valve opening and closing parts are driven by the stem, and around the axis of the valve stem for the movement of the valve, mainly used to cut off or connect the pipe in the medium, can also be used for fluid regulation and control, hard seal V-type ball valve surfacing carbide alloy metal seat between the strong shear force, particularly suitable for fiber, micro-solid particles and other media. Generally divided into handle cast steel ball valve, pneumatic cast steel ball valve, electric cast steel ball valve, cast iron ball valve, stainless steel ball valve, copper ball valve.

Cast steel ball valve works by rotating the valve to make the valve open or close. Ball valve has light switch, small size, simple structure, in various industries have been widely used.