The selection method and basis of electric control valve are important links to ensure that the valves can accurately and reliable meet specific process requirements and operating conditions.
The following provides a detailed explanation of the selection method and selection criteria for electric control valves:
I. Selection methods
1. Clarify requirements and working condition analysis.
Understand the process requirements: First, clarify the specific role of the electric control valve in the process flow, such as adjusting flow, pressure, temperature or achieving switch control.
Analyze working conditions：Analyze in detail the medium characteristics(such as temperature, pressure, flow, viscosity, corrosiveness), working environment(such as explosion-proof, dust-proof, moisture-proof requirements) and operation mode(such as continuous operation, intermittent operation, remote control, etc.).
2. Choose the right valve types.
Choose appropriate valve types according to the working conditions, such as globe valves, ball valves, butterfly valves, regulating valves, etc. Different types of valves differ in structure, sealing performance, flow characteristics, etc.
3. Determine the material and actuator.
Material selection: Select appropriate valve material according to the chemical properties, temperature and pressure conditions of the medium to ensure that the valve can operate stably for a long time.
Actuator selection: Select the appropriate according to the control requirements and operating conditions, including electric, pneumatic or hydraulic. For electric actuators, parameters such as power, speed and voltage also need to be considered.
4. Evaluate performance and reliability.
Evaluate the performance parameters of the valve, such as flow coefficient, leakage level, operating torque, etc., to ensure that the valve can meet the process requirements.
Consider the reliability and durability of the valve and choose products with reliable quality and stable performance.
5. Consider installation and maintenance.
Evaluate the installation space and installation method of the valve to ensure that the valve can be conveniently install in the pipeline system.
Consider the maintainability of the valve and convenience of replacing wear parts to reduce maintenance costs and downtime.
6. Compare and select.
Comprehensively compare electric control valves of different brands and models, and weigh them in terms of performance, price, brand reputation, after-sales service, etc.
Choose the product with the best price performance ratio to ensure maximum return on investment.
II. Selection basis
1. Process conditions.
Select the appropriate valve type and material according to the specific requirements of the process.
2. Fluid characteristics.
The characteristics of temperature, pressure, flow and viscosity of the medium directly affect the selection of the valve.
3. Working environment.
The explosion-proof, dust-proof and moisture-proof requirements of the working environment are also important bases for selection.
4. Control requirements.
Control requirements such as control accuracy and response time determine the choice of actuators and the performance parameters of valves.
5. Economical.
Under the premise of meeting the process requirements, consider the cost, maintenance cost and long-term operating cost of the valve and select economical and reasonable products.
6. Security and reliability.
Ensure that the selected valves have good safety and reliability to ensure the smooth progress of the process and the safety of personnel and equipment.
In summary, the selection method and basis of electric control valve is a process of comprehensive consideration of multiple factors.
By clarifying requirements, analyzing working conditions, selecting appropriate valve types and materials, evaluating performance and reliability, considering installation and maintenance, comparing and selecting, you can ensure that the selected electric control valve can accurately and reliable meet specific process requirements and operating conditions.
