(l) Station and Yard Pressure Regulating Device Station and yard pressure regulating device refer to the pressure regulating system of gas source, gate station, storage and distribution station, gas distribution station, gasification station, gas mixing station, gas filling station, etc. It is designed and constructed according to the technological requirements of stations and yards. Generally, the inlet and outlet pressures of pressure regulating devices such as stations are relatively high, and can be installed in the open or indoors according to conditions and requirements; the pressure regulating devices of stations are generally equipped with metering equipment to measure the gas entering and leaving the station.

(2) Network pressure regulating device Network pressure regulating device refers to the pressure regulating system set by changing the pressure on the pipe network at all levels in the transmission and distribution system. The inlet and outlet pressure is determined by the pressure level of the transmission and distribution system. Network voltage regulators are generally located in dedicated buildings. Generally, there is no need to install metering equipment in the network voltage regulating device, and the network voltage regulating device can be divided into the network connection voltage regulating device and the regional voltage regulating device.

Network connection pressure regulating device Network connection pressure regulating device: When the pressure level of the pipe network in the gas transmission and distribution system is three or more, the outlet pressure of the pressure regulating device is above medium pressure, and the pipe network is not directly related to a large number of users. Connected network voltage regulator.

The outlet pressure of the pressure regulating device in the regional pressure regulating device transmission and distribution system is a low pressure network pressure regulating device whose pipe network is directly connected to a large number of users. The regional pressure regulating device supplies air to users within a certain area.

(3) The dedicated pressure regulating device is a pressure regulating system that directly supplies gas to industrial users or large commercial users directly from the urban gas transmission and distribution system. The special pressure regulating device should be designed with measuring equipment. According to the inlet pressure and environmental conditions, it can be installed in the open air, in a single, single-story building, in a single-story building adjacent to the gas building, in a production workshop of a single, single-story building, in the top floor of the gas building, and on the roof platform . The special pressure regulating device can also be installed in the pressure regulating cabinet or the pressure regulating box according to the scale.

(4) User pressure regulating device The user pressure regulating device is a pressure regulating system used to supply one household or one (or several) residential users. The pressure regulating device for one household is generally set at the gas appliance, and the inlet pipe section has a relatively high pressure and is laid indoors. Therefore, necessary safety measures should be taken to ensure safe operation. The pressure regulating device for one (or several) residential users is generally installed in the courtyard or in a metal box hung on the outer wall of the building.