This because the edge bevel is relatively large, so the cutting resistance is small, the notch is flat.Mainly used for cutting high demand, relatively thin materials, such as: film, thin plastic, etc.
3 piece ball valve Floating Ball Ball valve in which the ball is not rigidly held on its rotational axis and so is free to float between the seat rings Size and Range: Size: 1/2” ~ 2” Pressure Rating: 150LB ~ 2500LB Temperature: -196Deg. C ~ 600Deg. C App