Key technologies for natural gas pressure regulators mainly include their classification based on working principles, performance parameters and characteristics of different models, and the continuously developing testing, safety, and efficiency improvement technologies within the industry.
A gas pressure regulator is a device that automatically changes the gas flow rate through a regulating valve to maintain a specified outlet gas pressure. They are generally classified into two types: direct-acting and indirect-acting. A direct-acting pressure regulator consists of a measuring element (diaphragm), a transmission component (valve stem), and a regulating mechanism (valve). When the outlet pressure changes, the valve opening is adjusted by balancing the diaphragm and spring forces. An indirect-acting pressure regulator consists of a main regulator, a pilot valve, and an exhaust valve. The pilot valve controls the pressure in the space beneath the diaphragm of the main regulator to regulate the valve. Direct-acting pressure regulators are suitable for small liquefied petroleum gas (LPG) pressure reducing valves and individual users, while indirect-acting pressure regulators are suitable for gas storage and distribution stations, regional pressure regulating stations, and large-scale dedicated user pressure regulating stations.