What does a self-acting valve mean in the lubricating oil system of the rich gas compressor in an FCC unit?

A self-acting control valve does not require an external control signal; instead, it integrates parameter measurement and regulation to form an independent on-site control system.

Generally, the pressure measurement point is located on the main supply pipe before the oil reaches the unit, after the oil cooler and filter; the check valve is situated on a bypass of the main supply pipe, with the flow eventually returning to the oil tank

Does the self-acting valve regulate the oil pressure by itself?

The ZZYP/N/M type self-acting single-seat/double-seat/sleeve pressure control valve is composed of components such as the valve body, valve seat, valve core, and balance spring. It is a valve that requires no external power source; it operates automatically by utilizing the pressure changes of the medium being regulated. Based on mechanical principles, it uses the controlled medium to generate force that drives the movement of the valve core up and down, thereby achieving automatic regulation and providing energy savings by maintaining a constant pressure or reducing pressure before or after the valve. The biggest advantage of this product is its ability to operate in environments without electricity or gas, and the pressure setting can be adjusted freely within a certain range during operation. It features a quick-opening flow characteristic, offering rapid response and excellent sealing performance; it is widely used in various industrial devices in sectors such as petroleum, chemicals, power plants, light industry, and printing and dyeing for the automatic control of pressure of gases, liquids, steam, and other media.

The ZZYP/N/M type self-acting single-seat/double-seat/sleeve pressure control valve is composed of components such as the valve body, valve seat, valve core, and balance spring. It is a valve that requires no external power source; it operates automatically by utilizing the pressure changes of the medium being regulated. Based on mechanical principles, it uses the controlled medium to generate force that drives the movement of the valve core up and down, thereby achieving automatic regulation and providing energy savings by maintaining a constant pressure or reducing pressure before or after the valve. The biggest advantage of this product is its ability to operate in environments without electricity or gas, and the pressure setting can be adjusted freely within a certain range during operation. It features a quick-opening flow characteristic, offering rapid response and excellent sealing performance; it is widely used in various industrial devices in sectors such as petroleum, chemicals, power plants, light industry, and printing and dyeing for the automatic control of pressure of gases, liquids, steam, and other media.