Archive for category Process Valving
In case you missed last month’s webinar with Jordan Valve on back pressure regulators, we’ve put together some of the key points.
The Control Loop:
Sensing element: measures the process variable being controlled, and send an output to the controlling instrument
Controlling instrument: calculates the error (difference in signal from sensing element and the desired setpoint) and sends corrective signal to final control element
Final control element: varies the flow to change the controlled variable to the required setpoint
Let’s start with the basics.
What is a pressure regulator?
A pressure regulator is a normally-open valve used to regulate or reduce undesirable, high upstream pressure. The pressure regulator must be installed at the START of a system, before any pressure-sensitive equipment.
The valve is held open by springs, and a screw that sets spring force. When outlet pressure exceeds the setpoint, the valve will close. When the valve closes, pressure is reduced downstream.