From the previous passage, we can simply understand of the globe valve and throttle valve. Next I will introduce the gate valve and butterfly valve.

1.Gate valves

The main components of gate valve are stem and disc, and the disc will move up and down under the drive of stem. Although the gate valve has good tightness and strong regulating function, its large volume, complex structure and long maintenance time are greatly restricted in the application of chemical system.

2.Butterfly valves

In the role of vertical rotation of the switch control, butterfly valve mainly plays a role of cutting and interception in the pipeline. The structure of butterfly valve is simple with strong ability to adapt to the environment. Control effect is more ideal.

Here are our gate valve and butterfly valve.

As the china DIN globe valve factory, ZJCLV also produce ball valve and butterfly valve. See more: www.clvvalve.com.

Globe Valves

 

What are Globe Valves?

Globe valves, a type of control valve, are used to stop, start and regulate the flow of media through a pipe. From the outside, they have a spherical body design. And inside, a plug-like disc sits on the end of a threaded rotating stem to raises and lowers to control media flow. Globe valves are part of the linear motion valve family, which means that the valve mechanism moves along a straight line.

How Does a Globe Valve Work?

Named for their spherical body shape, globe valves bodies are separated into two halves by an internal baffle. The seat on the globe valve disc can be screwed in to close the valve. Most automated glove valves use smoother stems not threaded ones. And use an actuator assembly to open and close.

Gate Valves

What are Gate Valves?

Gate valves are linear motion valves that are used only to start or stop media flowing through a pipe. They are shutoff valves instead of control valves, since they are not ideal for throttling.

Generally, they are designed with a flat or wedge-shaped disc on the end of a threaded stem, which is turned via a wheel and raises and lowers to operate the valve. Gate valves provide a tight shutoff, and  are commonly used for isolating media. Because they do not force media to change course (as in a globe valve) , gate valves cause little pressure drop.

Gate and globe valves often work in tandem inside a piping system. Gate valves can be designed with rising or non-rising stems, which is helpful for space optimization.

 

How Does a Gate Valve Work?

When a gate valve is activated, the stem will turn clockwise or counter clockwise to raise or lower the disc inside the pipe. In its closed position, the disc lodges between the seats in the base of the valve, providing a full stop at a right angle to the media flow. The disc can be shaped like a wedge, knife or parallel panel.

 

Ball Valves

What are Ball Valves?

Unlike gate or globe valves, ball valves are a type of quarter-turn valve that utilizes a bead shaped ball with a hole in the middle to control the flow of media. Called a bore or port, the hole in the middle of the ball allows media to pass through the valve body when opened, and is rotated 90 degrees to stop flow. The port is aligned perpendicular to the valve body in the closed position.

 

How Does a Ball Valve Work?

Ball valves are a type of quarter-turn valve which use a hollow, perforated and pivoting ball to control the flow. It opens when the hole of the ball is in line with the flow and closes once pivoted 90-degrees by the valves handle. The handle lies flat in alignment with the flow whilst open and perpendicular once closed. This allows for easy visual confirmation of the ball valves status.

Pros&Cons

 

	Pros	Cons
Globe Valves	Can regulate media flow. Can handle high-pressure, high-temperature, corrosive or viscous media	Create a high-pressure drop Introduce resistance to media flow
Gate Valves	Economical option for on/off control Multidirectional	Offer little resistance to media flow Not ideal for regulating media flow The sustained flow of media in a partially open position Can cause water hammer Prone to leaks: less durable than ball valves
Ball Valves	Long lasting and durable Versatile media compatibility Compact Provide fast cycle speeds Good for high-pressure, high-volume applications Offer little resistance to media flow	Not ideal for regulating flow Fast cycle time can lead to water hammer

 

As a producer of high-quality valves, ZJCLV can meet various customized requirements of customers. We can produce ball valves from 1/2 inch ball valves to larger ones.

See more: www.clvvalve.com

Valves are used to control the flow of gases, liquids and particulate solids. They come in many types, sizes, materials, pressures, temperature classes, and drive modes. Gate valve and ball valve are two distinct members of the valve family, which are generally used for two different types of flow control.

About Gate Valves

 

The gate valve has a flat closing element that slides in the medium flow to open or close the valve. In the bronze valve body often used in commercial and residence applications, the bronze disc moves up and down to open and close the valve. The valve is designed to keep the brass stem at the same height relative to the movement of the disc. A Teflon packing is used in the threaded cap to prevent leakage around the valve stem. The manual valve is driven by turning the cast iron hand wheel (a ball valve butterfly handle or a ball valve blue handle).

About Ball Valves

The ball valve has a spherical closing element, round or other shaped hole. Align the hole with the flow, open the valve, and close the solid flow outside the ball. The ball is located on the valve seat, and the valve rod is inserted into the top of the ball. The packing and gasket anti port gate valve around the valve stem has two ports, one inlet and one outlet. The above gate valves have threaded ends, and welding and flange connections are available.

Advantages of Ball Valves

1.The thrust bearing reduces the friction torque of the valve rod, which can make the long-term operation of the valve rod stable and flexible. 2.Anti static function: a spring is set between the ball, valve rod and valve body, which can export the static electricity generated during the switching process. 3.The fluid resistance is small, and the pneumatic ball valve is the one with the smallest fluid resistance among all valve classifications. Even the reduced diameter pneumatic ball valve has a relatively small fluid resistance. 4.The valve rod seal is reliable. Because the valve rod only rotates without lifting, the packing seal of the valve rod is not easy to be damaged, and the sealing capacity increases with the increase of medium pressure. 5.Because the main valve seat sealing ring material of the ball valve is Teflon, which is inert to almost all chemicals, and has the comprehensive characteristics of small friction coefficient, stable performance, not easy to aging, wide temperature application range and excellent sealing performance.

Advantages of Gate Valves

1.The flow resistance is small, the medium channel inside the valve body is straight, the medium flows in a straight line, and the flow resistance is small. 2.Compared with the stop valve, it is labor-saving when opening and closing, because whether it is open or closed, the movement direction of the ram is perpendicular to the medium flow direction. 3.The height is large, the opening and closing time is long, the opening and closing stroke of the ram is large, and the lifting and lowering is carried out through the screw. 4.Water hammer is not easy to occur because of the long closing time. 5.The medium can flow in any direction on both sides, which is easy to install. Both sides of the gate valve channel are symmetrical.

 

Ball Valve Details

 

There is no good or bad between ball valve and gate valve. Please buy the right valve according to your own needs.

The article is from ChuangLian Valve Co., Ltd. For more information, please find our website www.clvvalve.com