Rising national sliding valves;It is a type of valve that can be monitored by installing the monitoring key, which does not disrupt the flow in the full open position, the open location can be monitored with the movement of more or less.Butterfly causes lower pressure loss than the valves.Thanks to the screw shaft mounted in the body, the sliding movement is moved and the opening and closing of the valve is performed.Sealing is provided with rubber -coated bonds.It is used in fire installations.It is not used for control and flow adjustment.