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1. Can the installation head of a thermal gas mass flowmeter rotate?
The head of a thermal gas mass flowmeter can usually rotate, which is a standard design function. 1. The design of the meter head rotation function is mostly limited, such as the meter head of a digital gas mass flowmeter that supports rotation from 300 ° to 360 °, in order to adapt to different pipeline installation directions and on-site reading requirements. Rotating structures usually use universal joints or flange connections with locking functions, which can fix the meter head at any angle. 2. Specific rotation ability • Rotation range: Mainstream brands (such as Endress+Hauser, Siemens, Emerson) can rotate the meter head by more than 300 ° • Locking method: using anti slip gear disc structure or locking nut design to avoid vibration induced displacement • Cable protection: internal wiring adopts redundant design to prevent cable twisting during rotation. 3 Installation precautions: When rotating the meter head, it is necessary to: • Loosen the fixed bolts/nuts first, adjust them to the target angle, and then re lock them • Ensure that the sealing ring is intact to prevent water vapor from entering (the protection level usually needs to maintain IP67) • Avoid exceeding the calibrated rotation limit (usually with physical limit devices). 4 Some explosion-proof (Ex d/IIC T6) or high-voltage products with special model differences may limit the rotation angle, please refer to the product manual for details. For example, some models restrict 180 ° rotation to avoid explosion-proof joint surface failure. It is recommended to refer to the installation manual of the corresponding model before operation, as the specific rotation mechanism may v
2. Unit of thermal gas flowmeter
The unit of thermal gas flowmeter mainly depends on the measurement principle and display settings, usually in volume flow units or mass flow units.
. 1. Absolute flow rate unit • cubic meter/hour (m ³/h): The most commonly used unit of volumetric flow rate, suitable for industrial process control. • liters per minute (L/min): commonly used in small pipelines or laboratory environments. • Standard cubic meter per hour (Nm ³/h): Refers to the volumetric flow rate of gas at standard conditions (0 ° C, 101.325kPa), used for trade settlement and energy consumption measurement2. Mass flow unit • Kilogram per hour (kg/h): A unit for directly measuring gas mass flow rate, with high accuracy and not affected by temperature and pressure. • Ton/hour (t/h): Used for high flow gas measurement, such as power plant flue gas monitoring
3. Other commonly used units • Foot ³/minute (CFM): British unit, commonly used in ventilation systems in North America. • Gallons per minute (GPM): mainly used for liquid measurement, but some gas flow meters can also switch display
4. Unit conversion and setting - Contemporary thermal flow meters usually support multi unit switching and need to be set in the instrument menu. -If the display unit is SCFM (standard cubic feet per minute) or SLPM (standard liters per minute), it means that it has been automatically compensated to the standard state. -Attention: The volumetric flow rate in non-standard conditions can only be converted to accurate values by compensating with temperature/pressure sensors
5. Selection and usage precautions - For industrial sites, Nm ³/h or kg/h should be preferred to
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