What are the differences between gate valves and ball valves
date:2026-02-26 13:58
The valve seat of the ball valve has a spring inside, and the sealing design of the valve seat makes it difficult for debris in the medium to enter the valve seat. The valve seat is in long-term contact with the valve ball under the action of the spring, so when the valve is in motion, the valve seat has a certain scraping effect, which can scrape off the debris attached to the valve core after long-term operation, thus ensuring the sealing performance of the valve for a long time. Especially in high temperature and high pressure applications, due to the selection of materials with the same coefficient of thermal expansion for the valve seat, valve body, and valve ball, as well as the spring structure of the valve seat, the huge temperature difference and temperature drop when the valve is closed will not affect the valve's action, and the valve will not lock up. The valve seat of a gate valve is very narrow. In high-temperature applications, when the valve is closed, due to the lack of medium circulation, the temperature drops, causing the valve seat to tighten and exert a large compressive force on the valve plate. When opening the valve again, a large torque is required to overcome this clamping force, which can cause significant damage to the valve seat and affect its lifespan. This has affected the service life of the valve. Additionally, due to the self weight of the gate when the valve is closed, it can cause significant impact and noise to the valve.
The stroke of the ball valve is angular, so the installation space is small and the height is low.
The stroke of the gate valve is a straight stroke, so the installation space is large and the height is high.
