Direct-acting LPG pressure regulators have a basic design, as their sensing element is directly connected to the actuator, and their operation does not require an external power source.

Indirect-acting pressure regulators for LPG use an external power source to drive the actuator.

The pressure drop from high to low is achieved in a single step using single-stage pressure regulators.

The pressure drop from high to low is achieved in a single step using single-stage pressure regulators.

The two regulators that make up the first and second stages of a two-stage gas pressure regulator are connected to each other. Since these regulators reduce pressure in two stages, they are the most accurate and reliable. The first stage reduces the pressure from high to medium, and the second stage reduces it from medium to low. Both stages of the two-stage gas pressure regulator are fully matched in terms of performance, so no further adjustment is required for either of them. In addition, these regulators are very compact and affordable. When liquid propane-butane tanks and consumers are located in close proximity to one another, they are used in the process of autonomous gas supply.

The current pressure is measured by a sensor, which then transmits this information to the controller.

The actuator (spring-loaded, pneumatic, hydraulic, or electric) determines the output value required and sends the corresponding signal to the controller.

The control device compares the signals received from the sensor and the setpoint device, calculates the action required to adjust the current value to the desired value, and transmits a control signal.

The actuator receives a command and converts it into a control action;

The control mechanism moves to the position specified by the command.