The ball valve can be divided into floating ball valve and fixed ball valve according to different working modes of the ball valve. What are the main differences between floating ball valve and fixed ball valve?
Working Principle
1.The ball of the China floating ball valve has only the upper valve stem, and the ball can be slightly displaced, so it is called the floating ball valve. There is a fixed shaft at the bottom of the fixed ball valve to fix the position of the ball, and it cannot be displaced, so it is called a fixed ball valve.The ball of DOCN floating ball valve will be displaced due to the pressure of the medium.
2.It should be tightly attached to the seat to achieve sealing, so it is necessary to consider whether the seat material can withstand the working pressure. The ball of DOCN fixed ball valve is fixed, it is driven by the pressure of the medium to move the valve seat, and the sealing is achieved by tightening on the ball.
Function and Use
1.China Floating ball valve is applicable to medium and low pressure, and the diameter is small. The fixed ball valve can withstand up to 2500LB, and the size can reach 60 inches.
2.Dongchen fixed ball valve can realize the function of double resistance and double discharge, while the floating ball valve is mostly one-way sealed. The fixed ball valve can block the upstream and downstream media at the same time. When the pressure in the valve body is greater than the tightening force of the valve seat spring, the valve seat will be pushed away, releasing the pressure.
3.Fixed ball valves usually last longer than floating ball valves.
4.Fixed ball valve torque is smaller than floating ball valve, so the operation is less effort.
5.Fixed ball valves over 4 inches have a grease valve, floating ball valves do not.
6.The sealing performance of Dongchen fixed ball valve is more reliable. PTFE single material seal is embedded in the stainless-steel seat, and the end of the metal seat is equipped with a spring to ensure sufficient preload of the seal. When the sealing face is worn, the valve can continue to ensure good sealing performance under the action of the spring.
Zhejing Dongchen Valve Technology Co., LTD