Overview of E+H Flowmeter Selection
E+H flowmeter detection technology has been widely used in national defense, scientific research, industrial and agricultural production, energy management, and environmental protection.Correct and reasonable E+H flowmeter selection directly affects enterprise production control results, product quality, and even usage safety. This article focuses on the principles, steps, classifications, and precautions of E+H flowmeter selection to provide reasonable solutions for flow measurement.
Principles of E+H Flowmeter Selection
E+H flowmeter selection should be based on production requirements, starting from instrument supply and actual conditions, and comprehensively consider the three elements of safety, accuracy, and economy.
Safety and Reliability
First, the measurement method must be reliable, and accidents must not be caused by mechanical strength or electrical circuit failures during flow measurement. Second, E+H flowmeters should not affect the safety of the production system under normal production or fault conditions. For example, in fuel plants and flammable gas occasions, explosion-proof E+H flowmeters should be selected.
Adaptability to Fluid Characteristics
Determine the form and specifications of the E+H flowmeter according to the properties and flow conditions of the fluid being measured. Different media (conductive/non-conductive, clean/dirty, liquid/gas/steam) require different measurement principles.
Steps of E+H Flowmeter Selection
Step 1: Determine Accuracy Requirements
Clarify the measurement purpose: whether it is only necessary to roughly determine whether the fluid is flowing or whether precise measurement is required. This is the primary basis for E+H flowmeter selection.
Step 2: Preliminary Selection by Exclusion Method
- After determining that an E+H flowmeter must be installed, understand the usage requirements and various conditions in detail.
- According to the fluid type and characteristics, use the exclusion method to select E+H flowmeters suitable for different media.
- Combine the principles of safety, accuracy, and economy to finally determine the model.
Types and Applicable Scope of E+H Flowmeters
| Type | Applicable Medium | Main Features |
|---|---|---|
| Electromagnetic flowmeter | Conductive liquids (including corrosive), temperature ≤180℃ | High accuracy, no pressure loss, good stability; lining and electrode materials need to be reasonably selected |
| Vortex flowmeter | Clean liquids, gases, steam | Measuring tube fully stainless steel, corrosion resistant and high pressure resistant, high accuracy, explosion-proof optional, some with temperature and pressure compensation |
| Ultrasonic flowmeter | Various liquids | Non-contact measurement, not affected by anti-corrosion, pressure, or temperature, can be disassembled without stopping flow, suitable for large pipelines |
| Micro-flow flowmeter | Liquids with micro flow | Lower limit as low as 2.1m³/h, high accuracy, resistant to high temperature, high pressure, and corrosion |
Electromagnetic Flowmeter Selection
Electromagnetic E+H flowmeters are mainly suitable for flow measurement of conductive liquids, with temperature not exceeding 180℃. The advantages are high accuracy level, no pressure loss, and good stability. They can measure various corrosive solutions and have excellent chemical resistance after reasonable selection of lining materials and electrode materials.
Vortex Flowmeter Selection
E+H vortex flowmeters are suitable for the measurement of various clean liquids and gases. The measuring tube wall is fully stainless steel, with good corrosion resistance and high pressure resistance, and high accuracy level. They are especially suitable for clean fluid measurement, such as trade measurement (natural gas transmission and distribution pipelines), process control (petrochemical, power, industrial boilers), and standard devices. Multiple explosion-proof grades are available, suitable for explosive occasions. E+H intelligent turbine flowmeters also come with a temperature and pressure compensation system.
E+H vortex flowmeters can measure gases, liquids, and steam, are insensitive to changes in fluid physical properties, output pulse signals proportional to flow velocity, have no zero drift, wide rangeability, small pressure loss, and flexible installation methods (pipeline type or insertion type, horizontal, vertical, or inclined). Suitable media include non-conductive liquids (excluding electromagnetic flowmeters), steam, and superheated steam.
Ultrasonic Flowmeter Selection
E+H ultrasonic flowmeters use the ultrasonic principle and adopt a non-contact method. They are almost unaffected by fluid measurement environment factors such as anti-corrosion, pressure, and temperature, and are suitable for flow measurement of various liquids. Their outstanding feature is that they can be disassembled without stopping flow; only the probe needs to be clamped on the pipeline, which greatly facilitates installation and use, and is especially suitable for E+H flowmeter selection for large pipelines and large pipe networks.
Micro-flow Flowmeter Selection
E+H micro-flow flowmeters are a type of turbine flowmeter, specially used for micro-flow measurement. They have an extremely low lower limit (up to 2.1m³/h), high accuracy, and high stability. The overall design meets the characteristics of high temperature resistance, high pressure resistance, and corrosion resistance. For micro-flow measurement, E+H micro-flow flowmeters are an ideal choice.
Precautions for E+H Flowmeter Selection
- Clarify fluid properties (conductivity, corrosiveness, cleanliness, temperature, pressure).
- Determine the required accuracy level and range.
- Consider installation conditions (pipe size, installation method, explosion-proof requirements).
- Evaluate economy, including procurement cost, maintenance cost, and after-sales service.
Our company provides a one-year warranty service for all sold E+H flowmeters and provides various E+H flowmeter technical support and installation guidance. Therefore, the after-sales service of the E+H flowmeter manufacturer is also an indispensable consideration factor in selection.