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Standard gas pressure reducer special gas pressure reducing valve Laboratory pressure gauge explosion-proof shock-proof manufacturer directly operated instruments
Model: MY-151
Measuring range: 0-1.25 (MPa)
Applicable medium: pressure reducer
New upgrade PRO pressure reducer,
Standard gas reducing valve,
Manufacturer direct selling standard gas pressure reducing valve,
"Standard gas pressure reducing valve" usually refers to the valve device used for standard gas pressure reduction, the following is a detailed introduction to it:
Definition and function
A standard gas reducing valve is a device specifically designed to reduce a standard gas from a high pressure state to a suitable pressure range for use. Its main role is to ensure that the standard gas can be stable and accurate pressure output, so as to ensure that the flow rate and pressure of the standard gas meet the requirements of the instrument and equipment in various analysis, detection or calibration applications, so as to obtain accurate and reliable measurement results.
Structural characteristics
Valve body: Generally made of high-strength, corrosion-resistant metal materials, such as brass, stainless steel, etc., to ensure safety and reliability when subjected to high pressure gas. The channel inside the valve body is precisely machined to ensure smooth and stable gas flow. Spool and seat: Spool and seat are key components that control gas flow and pressure. The coordination accuracy between them is very high, usually using a hard seal or soft seal structure. Hard seal has good wear resistance and corrosion resistance, suitable for high pressure, high temperature and other harsh conditions; Soft seals have better sealing performance and can effectively prevent gas leaks, but may require more frequent maintenance under high pressure.
Spring: The spring is an important component that provides the resetting force of the spool. By adjusting the stiffness and preload of the spring, the opening pressure and adjusting range of the pressure reducing valve can be changed. Generally, high-quality spring steel is used to make springs to ensure their elastic stability during long-term use.
Adjustment knob: The adjustment knob is used to manually adjust the output pressure of the pressure reducing valve. The user can change the opening of the spool by rotating the adjusting knob according to the actual needs, so as to achieve accurate control of the output pressure. The adjustment knob usually has a good feel and scale indication, which is convenient for the user to operate and set the pressure.
When the high pressure standard gas enters the pressure reducing valve, the gas acts on one side of the valve core, producing an upward force. When this force is greater than the preload force of the spring, the spool begins to move upward, opening the valve, and gas flows out through the gap between the spool and the seat. With the outflow of gas, the outlet pressure of the pressure reducing valve gradually increases, when the outlet pressure acts on the other side of the valve spool and the spring force reaches balance, the valve spool stops moving, and the valve remains at a certain opening, so that the outlet pressure is stable at the set value.
Application field
Gas analysis Instruments:
In gas analysis instruments such as gas chromatograph, GMS, and infrared spectrometer, the standard gas reducing valve is used to accurately reduce the pressure of the standard gas into the instrument, which is used as the standard material for calibration and quantitative analysis to ensure the measurement accuracy and reliability of the instrument.
Environmental Monitoring:
In the field of environmental monitoring such as atmospheric monitoring and water quality monitoring, the standard gas reducing valve can be used to reduce the pressure of the calibration standard gas to the monitoring instrument, such as sulfur dioxide analyzer, nitrogen oxide analyzer, etc., to ensure the accuracy and comparability of the monitoring data. Industrial process control: In the industrial production process of chemical industry, steel, electric power, etc., the standard gas pressure reducing valve can be used to reduce the pressure of various process gases to the production equipment or control system to meet the requirements of the gas pressure and flow of the production process to ensure the stable operation of the production process and the consistency of product quality. Laboratory research: In chemical laboratories, materials laboratories and other scientific research places, standard gas pressure reducing valves are often used in various experimental devices to provide stable standard gas pressure for experiments to ensure the accuracy and repeatability of experimental results. Key points of selection
Pressure range: According to the actual use of the standard gas pressure and the required output pressure range to select the appropriate pressure reducing valve. Ensure that the rated pressure of the reducing valve can meet the maximum input pressure requirements of the standard gas, and its adjustment range can cover the required output pressure range.
Flow requirements: Select the rated flow of the pressure reducing valve according to the flow requirements of the equipment or system using standard gas. Generally, the pressure reducing valve with rated flow slightly greater than the actual flow should be selected to ensure that the normal operation of the system will not be affected by insufficient flow during use. Accuracy requirements: For some applications that require higher pressure accuracy, such as high-precision gas analysis instruments, a pressure-reducing valve with higher precision should be selected.
In general, the higher the precision of the pressure reducing valve, its price is relatively high, so it needs to be considered according to the accuracy requirements and budget of the actual application.
Gas compatibility: Different pressure reducing valves may be suitable for different types of gases. When selecting the standard gas reducing valve, it is necessary to ensure that its material and seals have good compatibility with the standard gas used to prevent chemical reactions between the gas and the pressure reducing valve, affecting the performance and service life of the pressure reducing valve, and even leading to safety accidents such as gas leakage. Connection mode: The inlet and outlet connection mode of the pressure reducing valve should match the connection mode of the system or equipment using standard gas. Common connection methods include threaded connection, sleeve connection, flange connection, etc., which should be selected according to the actual situation. Maintenance and maintenance Regular inspection: regularly check whether the appearance of the pressure reducing valve is damaged, corrosion, etc., check whether the sealing performance of the valve is good, if there is a leak, the seal should be replaced in time. At the same time, check the accuracy of the pressure gauge. If there is any deviation, calibrate or replace it.
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