How to Choose the Metering Solenoid?
To choose the correct metering solenoid, you need to know both the application requirements and the technical specifications.
1. Definition of Application Requirements
Firstly, you need to define what you want the solenoid to control. Consider:
Fluid type
Operating environment
Space for installation
Operating frequency
Desired lifetime
The mechanical and electrical design depends on the application.
2. Select the Correct Voltage
The possible voltage values are:
6V DC
12V D.C.
24VDC
The effect of voltage on the power consumption, temperature and magnetic force should be studied.
3. Required Force Check
The solenoid needs to provide enough force to produce the desired movement.
The key factors are:
The load requirement
Frictional force
Safety buffer
Operation position
If the force chosen is too low, the operation will be unstable.
4. Determine the Stroke Distance
The stroke is the distance that the plunger moves.
The longer stroke usually requires:
Larger magnetic structure
More power consumption
Larger product size
5. Assess the Duty Cycle
The duty cycle impacts the heat generation.
If the solenoid is used:
All the time
Often
Sometimes and sometimes not
6. Lifetime Requirements Evaluation
The many industrial applications require more than 100,000 operations. Evaluate the following criteria.
Material quality
Spring endurance
Wear resistance
7. Choose a reliable supplier
The successful supplier should be able to provide:
Engineering support
Prototype testing
Quality inspection
The ability to design to order
Choosing the right metering solenoid will increase system reliability, reduce maintenance expenses and improve product performance.
How to Avoid Common Metering Solenoid Design Mistakes
Do not select the force without considering the loading conditions.
Do not design the solenoid without calculating the heat correctly.
Ignoring the duty cycle requirements is a mistake.
“Don’t choose a stroke longer than necessary.
The installation tolerances cannot be overlooked.
The environment should always be considered:
thermal
humidity
dust on floor
corrosion corrosion.
The magnetic circuit can be designed to avoid low efficiency.
Test the prototypes before mass production.
Choose the appropriate materials for the plunger and housing.
Work with the experienced solenoid manufacturers to design the solenoid.
