The medium passes through the valve as the arrow indicates. The flow rate is determined by the position of the valve plug and the gap between the plug and seat. When there is no pressure (control line disconnected and no pressure applied), the valve remains shut due to the force exerted by the set point springs. The upstream pressure to be regulated is tapped before the valve and relayed through the external control line to the actuator, where it transforms into a positioning force. This force moves the valve plug in response to the spring force, which can be adjusted using the set point adjuster. As the force from the upstream pressure rises above the adjusted set point, the valve opens in proportion to the pressure change.

It is advisable to install the regulator in horizontal pipelines, positioning the actuator housing above the valve, facing upwards. Ensure that the medium's flow direction aligns with the arrow marked on the valve body. In scenarios where the blanketing gas may liquefy, forming condensate in the control line, this can damage the regulator. To prevent this, install the control line at a slight incline, allowing condensate to flow back into the tank. The control line should slope gently towards the pressure tapping point at the tank. Maintain a distance between the pressure tapping point and the regulator of at least twice the nominal diameter (DN). While typically installed horizontally, the regulator can also be fitted in vertical pipelines, provided the flow moves from bottom to top.