Security structure, the application of pneumatic valve and nominal menstruation

security pneumatic valve used in compression equipment, containers, or on the pipeline, as the overpressure protection device. When the pressure inside the equipment, containers, or line exceeds allowable values, pneumatic valve automatically opens, then the amount of emissions, in order to prevent the equipment, containers, or increase the pressure inside the piping to continue; When pressure is reduced to the specified value, pneumatic valve should be automatically closed in time, in order to ensure the safety of the equipment, containers, or line running. Security pneumatic valve can be driven directly by the system of pneumatic valve inlet pressure, in this case is provided by a spring or a heavy hammer mechanical load to overcome the effect of the medium pressure at the bottom of the pneumatic valve. They can also be driven by an institution to the forerunner, the agency through places a closing force to release or security pneumatic valve open or closed. Therefore, according to the drive mode security pneumatic valve can be divided into direct acting and pilot operated. Safe pneumatic valve can throughout the opening range, or in a considerable proportion of opening range open, can only within the scope of a small opening ratio, and then suddenly open to full open position. Therefore, safety pneumatic valve can be divided into ratio and the rev. Security structure, the application of pneumatic valve and the determination of nominal menstruation should be regulated, or should be with the statutory authority approval. Between different specifications, and its constraint terms and related definition may be different. Pneumatic valve in application security, must follow the requirements of the applicable specifications. For security pneumatic valve is a kind of automatic pneumatic valve, in terms of structure and performance parameters with general pneumatic valves have many differences. Easy to confuse the some special terms, in order to make the customers more clear understanding of the safety of pneumatic valves, and choose correctly.