Comparison of the performance of the clip-type thin ball valve and gate valve

Which of the ordinary butterfly valves and gate valves with the same nominal pressure and the same nominal diameter is better in tightness and is not easy to leak?
The sealing performance of the gate valve is better than that of the butterfly valve, but there are also manufacturers whose butterfly valve has good sealing performance.
The gate valve is bulky and takes up a lot of space.
The ball valve is small in size and takes up little space.
When selecting specifically, consider the temperature of the medium, the seal of the valve and the packing.
The specification specifies a disc valve with a nominal diameter greater than 50.
The clip-on thin ball valve is a national key new product. The high-performance manual ball valve adopts a double eccentricity and a special inclined cone elliptical seal structure. The utility model solves the problem that the traditional eccentric butterfly valve is still in sliding contact friction when the opening and closing is 0° to 10°, and the sealing surface of the valve plate is separated at the instant of opening, and the effect of closing the contact or sealing is achieved, thereby prolonging the service life and sealing performance. Good purpose.