Butterfly valve and ball valve are two commonly used valves. We will encounter many problems when we install them. In this article,Bundor Valve has screened out a common problem and will introduce you when to use a ball valve and when to use a butterfly valve.
- According to the selection of flow capacity, the flow capacity of the ball valve is better than that of the butterfly valve, because when the butterfly valve is in the open state, a butterfly plate in the valve body channel occupies a part of the flow channel. The smaller the diameter, the larger the proportion of the flow channel they occupy.
- According to the use temperature selection, due to the sealing material and structure, the ball valve is not suitable for steam medium, while the butterfly valve can be used for conventional (below 350 ℃) saturated steam medium for heating.
- According to the selection of the stress of the pipe network, due to the valve structure, the stress that the butterfly valve can withstand is higher.
- According to the service life, the ball valve and the butterfly valve have a long service life, but the non-metal in the sealing structure of the ball valve plays an important role, and the metal-to-metal seal of the hard-sealed butterfly valve will have a longer service life.
- According to the selection of operating torque, the opening and closing torque of the triple eccentric metal-sealed butterfly valve is very small, and the contact area of the sealing surface of the ball valve increases with the increase of the caliber, and the opening and closing torque of the large-caliber ball valve will increase. It is very large, so in terms of large-diameter valves, butterfly valves are more suitable.
- According to the sealing performance, the sealing performance of the ball valve is better than that of the butterfly valve, and the ball valve is two-way zero leakage. Butterfly valves are bidirectional ANSI Class V (no visible leakage).
- According to the price selection, the price of the ball valve with diameter ≤DN250 will be better, and the price of butterfly valve with diameter ≥DN300 will be more advantageous.
