December 8, 2022

Ball And Needle Valves: Knowing The Difference

You might be building a simple piping system to help you move your materials through processes. A complex multi-system with automated controls, monitoring, and more flow control is most likely an essential part of your project.

Stainless steel valves are most likely to help with flow control. However, to ensure safe and long-lasting performance or prevent typical hazards. Choosing the correct valve, such as figuring out control valve vs gate valve among available designs, is essential. In this article, we will discuss Ball and Needle Valves and their differences.

What is a Ball Valve?

Ball valves acquire their name from their design. At the center of the valve is a ball with a channel running through it. By rotating the ball 90 degrees, you can expose this channel to the flow stream, generating an open or closed state. Moreover, the ball valve’s short throw makes it a good choice for controlling flow in that specific position has full open or closed conditions, which are common when fast switching between states is needed.

​​​​​​Additionally, the design permits an extraordinary airtight seal. Since the valve seat is self-cleaning and there are few components within the valve, cleaning and maintenance requirements are minimal.

What are the types of Ball Valves?

Ball Valves have two types. One is called Floating Ball, and the other is called Trunnion Valves, which describes how the ball is positioned within the valve. Types can be subdivided into body styles and configurations.

Floating Ball

The Floating Ball valves are considered the most popular valve. This type of valve is not fastened to the stem, allowing for much freedom. The upstream pressure helps create the seal by pressing the ball onto the downstream or rear seat.

Trunnion Valves

Unlike the Floating Ball, this kind of valve is designed with a pin to prevent the ball from dislodging. This design applies to systems with high velocity. The ball is well-supported by shafts or posts on the opposite sides. The shaft may or may not be a part of the ball. However, trunnion valves reduce friction between the ball and the seal.

What are the Functions of a Ball Valve?

Ball valves are ideal for quick rapid stop or start actions. They are considered quick-acting since the handle must turn 90 degrees to activate the valve. The quarter turn reduces the valve operation time and has a likelihood of wear leaking, and it may need plastic mold tooling from medical molding companies. If a great degree of precision is not required, ball valves can be used for throttling services. Due to the high velocity and pressure of the fluid during acceleration, the partially exposed seat erodes due to throttling. The deterioration will eventually result in valve leakage. If the manual ball valve is automated, the leakage is rectified and can move more rapidly in response to a signal indicating a change in position.