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1. What are the components of a CNG dispenser?
1. A compressed natural gas dispenser is a specialized equipment that provides compressed natural gas fuel filling services to compressed natural gas vehicles and is equipped with metering and pricing devices. It consists of electronic control devices, filters, one-way valves, solenoid valves, mass flow meters, pressure transmitters, break valves, gun barrels, etc. The following are the main components: a mass flow meter is a measuring instrument that can directly and accurately measure the mass of fluid flowing through it. It is not affected by changes in pressure, temperature, and viscosity during its working process. The solenoid valve for dispenser on the gas dispenser is controlled by an electrical signal to open and close, thereby controlling the opening and closing of the gas circuit of the gas dispenser. 4. Break away the safety device on the coupling valve of the gas dispenser. Under the rated pull-out force, it can be disconnected into two sections and ensure automatic sealing of the opened sections. At the same time, it can be reconnected to ensure the normal use of the gas dispenser. The pressure protection device on the safety valve gas dispenser. When the pressure inside the gas dispenser exceeds the normal working pressure P (i.e. the set opening pressure of the safety valve), the safety valve opens to relieve pressure; When the pressure drops below the P value, it will automatically shut down to ensure that the gas dispenser can work normally. A pressure sensor is a device that outputs an electrical signal that can be processed based on pressure changes within the gas dispenser system. The control in sequence is based on the grouping of gas cylinders on the gas station, and the gas filling control is carried out by filling the car gas cylinders with gas machines in the order of low, medium, and high.
2. One article helps you understand flow meter pressure loss
Detailed explanation of flow meter pressure loss Flow meter pressure loss is one of the key indicators of flow meters, used to characterize the pressure difference between the input and output ends of the flow meter, and is also the lowest pressure difference to ensure the normal operation of the flow meter.
. The following is a detailed analysis of pressure loss in flow meters.1. Definition of flowmeter pressure loss is a parameter used to describe the pressure difference (P1-P2) between the input (P1) and output (P2) of the flowmeter. It is the minimum pressure difference required to ensure the normal operation of the flowmeter and is also one of the basic parameters of the flowmeter. During the use of flow meters, the magnitude of pressure loss directly affects the energy consumption of the system, the measurement accuracy of the flow meter, and the stability of the system.
2. Principle flowmeter is an instrument that indicates the measured flow rate and/or the total amount of fluid within a selected time interval.
. It usually converts the flow information of gases or liquids into electrical signals for subsequent processing and display. During this process, the internal structure and principle of the flowmeter will result in a certain pressure loss. Specifically, when converting flow information into electrical signals, flow meters usually need to first convert the flow information into changes in calorific value, pressure, or electromagnetic fields, and then convert