Special Fire Signal Resilient Seated Gate Valve

Signal gate valve and signal butterfly valve are used in automatic spraying water pipeline in fire protection system to monitor the water supplying pipeline and can indicate the valve's opening in a long distance.Rising stem gate valve and opening indicator gate valve are often used in fire protection system,and if the installation position is high to the ground,rising stem gate valve is used and can show the valves opening clearly and if the installation position is low,opening indicator gate valve is used. Material No.