Self-regulating valve for regulating the field of industrial automation and process control of media flow, pressure, temperature, level and other parameters. According to the automation system control signal, automatically adjust the valve opening, in order to achieve medium flow rate, pressure, temperature and level of regulation. Following on about what it works:

1. Self-temperature control valve works (heating)

Temperature control valve is based on compression and expansion and contraction of liquid non-work principle. Self-heating temperature control valve, when the temperature drops below the set temperature of the controlled object, the temperature of the liquid bag contraction, the role of putting in force on the actuator decreases, spool components under the action of the spring force of the valve open, steam and hot oil to increase the flow of heating medium, so that the temperature rise in the controlled object, until the temperature of the controlled object to a set value, the valve is closed, the valve closed, the plant temperature drops, the valve has opened, the heating medium and into the heat exchanger, and the temperature rose, so the temperature is a constant value of the controlled object. Valve opening and the controlled object the size of the actual temperature and set temperature difference between relevant.

2, self-working principle of temperature control valve (cooling type)

Self-cooling temperature control valve works can refer to self-heating temperature control valve, only when the actuator and valve components under the action of spring force to open and close off the valve and the temperature contrast, the valve body through the cold medium, mainly used in the temperature of the cooling device control.

3, the self-operated flow control valve works

Accused the media input valve, the valve before the pressure P1 through the membrane under the control line input chamber, the pressure after throttling by the throttle input film room Ps, P1 and Ps is the difference