One is to prevent the backflow of the medium, the other is to prevent the reverse phenomenon of the stop pump and the motor, and the third is to prevent the leakage of the container medium.
Classification of material 1. Cast iron check valve 2. Brass check valve 3. Stainless steel check valve 4. Carbon steel check valve 5. Forged steel check valve
The opening and closing part of the ball valve is a ball with a circular channel, rotating around the axis perpendicular to the channel, the ball rotates with the stem to achieve the purpose of opening...