Hi, this is the little housekeeper, industrial automation to the happiest day of a week again, holding the expectation of the holiday for tomorrow, will have more power to end the day's work? Today's little housekeeper to bring us relaxed and simple knowledge, accompany you have good weekend this week,

First, pneumatic control valve dynamic characteristic is the executing agency or a actuator combination valve positioner, the slower the production process, such as temperature control or level control, dynamic characteristics of valve generally not the limiting factor in terms of controllability, for faster system, such as the flow of fluid control, the regulator may have obvious lag, in loop control must be considered,

Pneumatic - valve class including regulating valve, throttle valve and the pressure reducing valve, its role is to adjust the medium pressure, flow parameters, such as regulating valve according to the structure is divided into nine categories: (1) the single-seat regulating valve; (2) two-seater regulating valve; (3) sleeve regulator; (4) the Angle regulator; (5) the 3-way regulating valve; (6) the diaphragm valve, (7) butterfly valve; (8) ball valve; Eccentric rotary valve (9), the former six straight travel, after three for quarter-turn, regulating valve, used for regulating the flow of medium, pressure and liquid level of pneumatic control valve is usually divided into direct single seat type and direct two-seater type two kinds, the latter has a large flow capacity, unbalanced and the characteristics of stable operation, so often especially suitable for large flow, high pressure drop and leakage less occasions,

Regulator includes both actuator and valve body, its role is to accept the control signal, controller sent to adjust the size of the medium inside the pipeline flow, so as to realize the automation of production process control,

Regulator is installed at the scene of the production, the use of conditions are generally poor. Especially the control medium has high pressure, high temperature, toxic, cryogenic, flammable and explosive, easy to crystallization, easy penetration, strong corrosion and the different characteristics such as high viscosity, the regulator can keep normal work will directly affect the safety and reliability of the automatic control system, therefore, the regulator is in the automatic control system is a very important part of,

Regulating valve according to its operation energy can be divided into pneumatic, electric and hydraulic three categories, they have their own advantages and disadvantages and applicable occasions, pneumatic control valve with compressed air as the energy, due to its simple structure, reliable operation, easy maintenance, low price and is suitable for the place for fire and explosion prevention, therefore widely used in chemical, petroleum, metallurgy, electric power and textile industries,