기능

• The stem screw part is always hidden in the main body, and when the valve is opened, the stem and handle are in the fixed position and do not rise, and the opening degree of the valve is not known. Therefore, an indicator is attached to the internal threaded gate valve. The internal screw type has a lower overall valve height than the external screw type, and is always in place even when the stem is not raised and fully opened, making it suitable for underground pipes and piping in a limited and narrow space.