1. Working principle
Ball valve: The opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and can be closed tightly with a small torque. Ball valves are most suitable for on-off valves and V-shaped ball valves.
Gate valve: The opening and closing part is a gate. The direction of movement of the plunger is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate. Usually the sealing surface is welded with metal materials to increase wear resistance, such as welding, stainless steel, etc. The ram has a rigid ram and an elastic ram. According to the difference of the gate, the gate valve is divided into rigid gate valve and elastic gate valve.
2. Features
Ball valve: wear-resistant; good sealing performance; because the sealing ring of the hard-sealed ball valve is manually polished, it can be used only after the valve core and the sealing ring are fully matched. Therefore, its sealing performance is reliable; the switch is very light; because the bottom of the sealing ring of the hard-sealed ball valve uses a spring to make the sealing ring and the valve core closely fit, when the external force exceeds the spring preload, the switch is very light and has a long service life.
Gate valve: light in weight, the valve body is made of high-quality ductile iron, which is about 20% to 30% lighter than traditional gate valves. Easy to install and maintain; flat-bottomed door seat; one-piece packaging, not easy to fall off, good elastic memory; precision casting valve body, valve body adopts precision casting, precise geometrical dimensions make the inside of the valve body without any finishing to ensure the sealing of the valve Sex.
