Details to consider when choosing a pressure regulating valve

In some occasions, if a pressure regulating valve (including a vent valve) is selected, the actual possible pressure difference should be properly expanded, that is, the actuator is required to provide a larger force. Otherwise, perhaps when there is an abnormal situation in the process, the actual pressure difference between the front and rear of the regulating valve is large, and there is a danger that it cannot be closed or opened.

In the production process of the accessories of the regulating valve, the control system puts forward various special requirements for the valve. Therefore, the regulating valve must be equipped with various auxiliary equipment (referred to as accessories) to meet the needs of the production process. The accessories of the regulating valve include: 1. The valve positioner is used to improve the operating characteristics of the regulating function of the regulating valve and complete the correct positioning.

The valve position switch shows the working position of the upper and lower limit strokes of the valve. When the air source of the control valve fails, keep the valve in the opening position before the air source fails. The solenoid valve completes the electromagnetic switching of the gas circuit to ensure that the valve is in the desired safe opening position when the power supply fails. Wheel organization When the controller of the control system fails, it can be switched to the manual method to operate the valve.