ZZWPE self operated electric temperature regulating valve

Working principle (cooling type)

The working principle of the self operated temperature regulating valve for cooling can refer to that of the self operated temperature regulating valve for heating. However, when the valve core component opens and closes under the action of the actuator and spring force, it is opposite to the temperature closing valve, and the valve body is filled with cold medium, mainly used for temperature control in cooling devices.

working principle

After the controlled medium is input into the valve, the pressure P1 in front of the valve is input into the lower membrane chamber through the control pipeline. The pressure Ps after throttling by the throttle valve is input into the upper membrane chamber. The difference between P1 and Ps, i.e. ¡÷ Ps=P1 Ps, is called the effective pressure. The balance between the thrust generated by P1 acting on the diaphragm and the thrust difference generated by Ps acting on the diaphragm and the spring reaction force determines the relative position of the valve core and valve seat, thereby determining the flow rate through the valve. When the flow rate through the valve increases, that is, ¦¤ Ps increases, P1 and Ps act on the lower and upper diaphragm chambers respectively, causing the valve core to move towards the valve seat, thereby changing the flow area between the valve core and the valve seat, increasing Ps. The thrust of the increased Ps acting on the diaphragm, combined with the spring reaction force and the thrust of P1 acting on the diaphragm, is balanced at a new position to achieve the purpose of controlling the flow rate. On the contrary, the same applies.   

Self regulating valves are used to adjust process parameters such as medium flow rate, pressure, temperature, and liquid level in the field of industrial automation process control. According to the control signal in the automation system, the opening of the valve is automatically adjusted to achieve the regulation of medium flow rate, pressure, temperature, and liquid level.

Ordering Instructions

Name and model of regulating valve

Nominal pressure Mpa

Nominal diameter (mm)

Rated flow coefficient (Kv)

Inherent flow characteristics

medium name

Working temperature and range

Operation mode of the whole machine

Pressure set point and adjustment range

Valve body, valve internals, and packing materials

Attached attachments