The shut-off valve is a kind of actuator in the automation system. It consists of a multi-spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve. The shut-off valve has a wide range of uses , which can be used to cut off gas, combustion air, cold air and flue gas.
The shut-off valve has a wide range of uses, which can be used to cut off gas, combustion air, cold air and flue gas. The gas shut-off valve cuts off the burner from the gas pipeline. The combustion-supporting air shut-off valve cuts off the burner from the combustion-supporting air pipeline. During the air supply period, the hot blast stove uses a burner shut-off valve to isolate the hot blast stove from the burner or the gas system and the combustion air system. The flue valve isolates the hot blast stove from the flue. The purpose of the cold blast valve is to separate the cold blast duct from the hot blast stove during the combustion period of the hot blast stove. When the pressure in the cold air pipe drops, the gas in the blast furnace may penetrate into the cold air pipe through the air mixing pipe and form explosive gas. To avoid this, a mixed air pipe is installed on the air mixing pipe between the air mixing control valve and the hot air pipe. Shut-off valve.
Mainly used in the following occasions:
1. Connect with the combustible gas leakage monitoring instrument. When the instrument detects the combustible gas leakage, it will automatically and quickly close the main gas supply valve, cut off the gas supply, and stop the occurrence of vicious accidents in time;
2. It is connected with the temperature and pressure controller of the thermal equipment. When the temperature and pressure of the detection point in the equipment exceeds the set value, the gas supply valve is automatically and quickly closed to stop the fuel supply;
3. Connect with the fire alarm system of the high-rise building. When a fire alarm occurs in the building, the gas supply in the building will be automatically cut off to prevent the occurrence of gas explosion;
4. ZCR gas emergency shut-off valve is installed in the gas supply pipe network of the city or factory, which can be centrally controlled in the control room, and remotely control the pipeline gas supply at the scene of the accident.