How to Choose Between Floating and Trunnion Ball Valves

How to choose between float ball valve and lug ball valve

Hello, field experts! When we are faced with the selection of key components in a fluid control system, making an informed decision between a float valve and a lug ball valve is undoubtedly a challenge. This article will delve into the design differences, working principles, application advantages and limitations of these two valves to help you make easy selection in actual work, gate valve manufacture.

Design differences

Float valve, named because its ball floats freely, usually consists of a valve body, valve cover, ball, valve seat, sealing ring and operating mechanism. Its design features are simple structure, reliable sealing and rapid opening and closing. However, in high pressure differential or high temperature environments, the ball of the float valve may shift, resulting in a decrease in sealing performance ball valve manufacture.

In contrast, lug ball valves use a fixed ball design that is connected to the valve body through two lugs. This design keeps the ball stable in high pressure differential and high temperature environments, ensuring reliable sealing performance. The lug ball valve has a slightly complex structure, but has excellent resistance to high pressure and high temperature.

working principle

The working principle of the float valve relies on the seal between the ball and the valve seat. When the valve is closed, the ball is tightly attached to the valve seat due to the pressure of the medium, forming a seal. When the valve is opened, the operating mechanism drives the ball away from the valve seat to allow fluid to pass, globe valve manufacture.

The working principle of the lug ball valve is similar, but the ball position is fixed. In the closed state, the medium pressure acts on the ball, pressing it tightly against the valve seat to achieve sealing. When the valve is opened, the operating mechanism drives the lug, causing the ball to rotate away from the valve seat, allowing fluid to pass.

Application advantages and limitations

Float valves have the advantages of simple structure, rapid opening and closing, and low fluid resistance. They are widely used in fluid control systems with medium and low pressures and temperatures. However, in high-pressure differential or high-temperature environments, the ball of the float valve may shift, resulting in a decrease in sealing performance, so it is not suitable for these extreme conditions, check valve manufacture.

In comparison, branch ball valves are suitable for extreme working conditions such as high pressure differences, high temperatures and corrosive media. Its fixed ball design ensures stable sealing performance in harsh environments. However, the lug ball valve has a complex structure, high manufacturing cost, and large fluid resistance, so it may not be the most economical choice in some common application scenarios.