Shanghai Mislier Pump Industry Co., LTD is a company specializing in the research and development, manufacturing, sales and service of water pumps. Founded in Shanghai in 2010, after years of development and accumulation, it has developed into an outstanding enterprise in the water pump industry integrating R&D, manufacturing, sales and service.
Why Choose Us
100% Satisfaction Guarantee
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Extensive Experience
Our team of professionals have been in the business for quite some time. Let us deliver solutions that work the first time!
Fair & Competitive Pricing
Our pricing structure is designed to make a modest profit so that we can continue to be a Hero another day.
WLD160 series integrated intelligent vfd constant pressure system is specially designed based on users' needs which can meet the applications of water supply in different occasions and improve the quality of water supply system.
Variable Frequency Drive Water Pump
Variable frequency drive water pump with superior performance and rich function, can meet the requirement of water supply in different occasions and improve the quality of water supply system to achieve the effect of energy saving and environmental protection.
Vfd booster pump small size, full function, energy saving and environmental protection is the best choice for household pump equipment.
Control Over Flow Rate
Valves and fixed speed drives are an inefficient way to regulate a pump's flow rate because they cause pressure drop and friction loss. The advantages of using a VSD to regulate pump speed, therefore, include dynamic flow control and reduced energy consumption. A VSD can maintain a constant flow rate while greatly reducing or eliminating the need for valves.
Match Speed To Demand
Another advantage of using a VFD with a water pump is the ability to operate the pump at lower speeds when demand is low. This technique, called "modulation," significantly reduces energy expenditure and can prolong the life of the pump by reducing wear and tear.
Pump systems are often oversized to meet peak demand but operate at a fraction of their potential flow rate most of the time. A correctly sized VSD can save energy by reducing pump speed during off-peak periods.
Reduce Maintenance Costs
VSDs reduce maintenance costs and prevent damage to pipes and valves from sudden changes in flow rate. Pressure sensors can be used in conjunction with the VSD to maintain a consistent pressure level throughout the system, regardless of changes in demand or flow rate.
VSDs control pumps by automatically 'softstarting' and stopping the pump mechanism, which reduces the risk of pipes and valves being damaged during rapid flow changes. Using a VSD can also prevent short-term overloading of the electrical supply every time the pump starts, and avoid mechanical shocks that may damage pipes, joints, or seals.
What Is Variable Frequency Drive Water Pump
A variable frequency drive water pump, or a VFD water pump, is a type of pump that is designed to regulate the speed and output of the pump according to the specific needs of the system. This is achieved by using a variable frequency drive controller that can adjust the speed of the motor that powers the pump.
Variable Frequency drives are a great way to control the speed of a pump. With many pumping applications, you encounter affinity laws. This means you save energy and cost with a VFD at a high rate while you decrease the speed. You also reduce mechanical stress when you control flow through a VFD rather than with valves.
If you know that a VFD is right for your pumping application, the next question is which one to use? There are many brands, and each brand has multiple series. There are several factors to consider when choosing the VFD to run your pump.
Load and Overload
Sizing VFDs is always based on the overload needs of the motor and driven equipment, in this case a pump. VFD manufacturer labeling of overload is not standardized. Many use terms like light duty, normal duty, and heavy duty.
To simplify your evaluation, look at the overload percentage over 60 seconds. A variable torque rating means the VFD will allow the motor to run up to 110% or 120% of its rated amps for one minute. A constant torque rating means the VFD will allow 150% for that same time.
Environment
Where you place your inverter is also important. There are a few variables to watch for that tend to be more common in pumping situations than in general applications.
Liquid
There are two main concerns with liquid. The first is direct contact, like splashing or washing down equipment. Some VFDS operate near the pump and may become wet. For this protection, you should enclose it in an appropriate panel, rated NEMA 4 or 4X.
If it is outside and rain or snow is the concern rather than splashing, then you would likely want to put the VFD in a NEMA 3R enclosure.
The other concern with liquid is humidity. Many pumping applications have high humidity, either naturally or because of the surrounding processes. Letting electrical equipment function in a humid environment can cause premature failures. Look into heaters, filters, and enclosures to solve this issue.
Heat
Pumps are often outdoors or in warm manufacturing facilities. Heat is one of the biggest killers of all electrical equipment, including VFDS. If the VFD is not kept in a climate-controlled area like an electrical room, it needs to have appropriate cooling fans or air conditioning units.
Chemicals
Many pumps are moving chemicals or are near products that need to be cleaned with chemicals. Not only will the liquid from chemicals damage a VFD, but corrosive materials and gases can also cause damage.
If you are concerned that chemicals may be an issue, you should investigate NEMA 4X enclosures. You also should reach out to our experts to talk through your situation as these ratings and protection methods can get complicated quickly.
Lead Length
Pump systems often have a long cable running from the VFD to the motor. This is especially prevalent in down well pump applications. Long lead lengths between the drive and motor can lead to reflective wave phenomenon, or DV/DT. This can cause your motor to prematurely fail.
If you have a cable over a couple hundred feet, you should look into output filters. These may be load reactors, DV/DT filters, or sine wave filters based on your situation.
Just because you have a submersible or down well pump does not mean your motor is far from the VFD. It's possible that your motor is at the top of a well with your pump at the bottom. Make sure you're confident in the lead length between the VFD and motor as that is what causes DV/DT.
Which VFD to Choose?
Once you've evaluated the factors above, you should be ready to choose your VFD. For lighter applications like centrifugal pumps, you'll often want to find a VFD labeled as "general purpose." For tougher applications like positive displacement pumps, look for "industrial" or "heavy duty" VFDS.
Variable Frequency Drive Water Pumps: A Simple Guide to Their Uses and Benefits
Why Do You Need variable frequency drive water pumps?
If you want to regulate the flow rate of your water pressure booster pumps, then you will need a VFD. It will give you dynamic control over the flow and reduce/increase the water level in your tank and the volume of water at which it is being supplied.
For the low water demand, the motor needs to slow down, so the supply is kept low accordingly. For the high demand, the pump needs to speed up accordingly. Thus, the pump needs to operate at maximum flow using maximum energy, meaning maximum costs. This is why you need variable frequency drive water pumps.
These drives save the booster pump from inefficient uses of resources when maximum flow is not necessary. With 90% of the cost coming from energy consumption, energy saving can create a significant impact on the pump's lifetime cost.
Rather than using traditional methods of controlling the level of water in your tank, such as the installation of float switches, you can use VFDs that are designed to manage flow variations.
Benefits of variable frequency drive water pumps
There are several advantages of running a water booster pump from a variable speed drive. Have a look at them:
Increases/decreases flow rate to meet specific water pressure requirements.
Minimizes pump maintenance by keeping the equipment running at its maximum efficiency and lowering total system pressure.
Boosts energy efficiency to power the water booster pump.
Decreases the cost of every gallon pumped.
Eliminates or lowers the number of control valves that need individual sensor installation and maintenance.
Gains full control over motor speed without making any switch to costly DC motors.
What Else?
Keep in mind that pumping abrasive slurries is challenging due to high viscosity. This can damage your pump, which is only designed to run at a fixed speed. Here, VFDs may allow you to pump slurries and adjust on the fly to changes in the liquid being pumped. This is a great perk for industrial applications.
How to Pick the Right variable frequency drive water pumps?
VFDs alone can't power a booster pump. Also, not all pump motors work well with VFDs. Thus, you will need guidance when it comes to choosing the right variable frequency drive water pump. Luckily, we can help you pick the best solution for your water pump room dimensions. Our pump motors are able to withstand the harmonics and frequencies of variable frequency drive water pumps. They also don't offer high-grade insulation and are able to operate the pump at a slower than usual speed without interrupting the heat loss pattern.

Variable Frequency Drive Water Pump Maintenance Checklist
Before performing maintenance checks on variable frequency drive water pumps, consult the manufacturer's manual. We've created an inspection checklist to help you keep on top of maintenance. This checklist aims to carry out a set of checks monthly or weekly.
Determine the Maintenance Frequency
Consult the manufacturer's manual to determine the timing to schedule your pump maintenance. Pick an appropriate time when the system is down. Machines should be properly shut down before performing any maintenance or inspection. Here, proper isolation is essential for electrical and hydraulic systems.
Visually Inspect the Pump
Inspect the variable frequency drive water pump regularly for any signs of wear and tear. Look for leaks, cracks, or other signs of damage to the casing, impeller, motor, and other pump parts. Make sure that the pump's bearings are adequately lubricated. Check the shaft seal for leaks and call a professional if you notice any leakage. Also, inspect the pump pressure and discharge gauges for abnormal readings.
Check the Pump's Alignment
Check the alignment of the variable frequency drive water pump's motor and the shaft to ensure they are correctly aligned. Misalignment can cause excessive damage to domestic variable frequency drive water pumps. Inspect the pump's foundation to ensure no loose frames and bolts. Also, check the vital components of the pump for any rust or degradation.
Test the Pressure Value
Testing the variable frequency drive water pump's pressure relief valve helps you ensure it is not stuck closed. This will require checking the electrical connections of the motor, switch, and other components to ensure they work correctly. Also, inspect and clean the suction strainer to ensure it is not clogged with debris.
Check the Pump's Performance
You need to check the pump's performance periodically. This includes measuring the variable frequency drive water pump flow rate, pressure, and other key parameters. Compare the results with the manufacturer's specifications. Additionally, check the pump for excessive vibrations that may indicate misalignment, wear, or other pump issues.
Clean the Pump
Be sure to clean the pump's exterior to prevent any dirt build-up. Please note that this check is not exhaustive, and the maintenance requirements may vary depending on the specific pump model. Thus, you should always refer to the manufacturer's specifications.

If you've been searching for a water pump, you may have come across variable frequency drive (VFD) pumps. But, what is a variable frequency drive water pump exactly? A variable frequency drive water pump, or a variable frequency drive water pump, is a type of pump that is designed to regulate the speed and output of the pump according to the specific needs of the system. This is achieved by using a variable frequency drive controller that can adjust the speed of the motor that powers the pump.
One of the main benefits of a variable frequency drive water pump is its ability to save energy and reduce costs. By regulating the speed of the pump to match the specific requirements of the system, a variable frequency drive water pump can avoid wasting energy and reduce the overall operating costs of the system. This is particularly useful in applications where the water demand varies throughout the day or seasonally, such as in irrigation systems or industrial applications.
Another advantage of a variable frequency drive water pump is its ability to provide better control and reliability compared to traditional fixed-speed pumps. With a variable frequency drive pump, the system can adjust to changes in demand quickly and efficiently, preventing over-pressurization or under-pressurization of the system. This can result in a more consistent and reliable water supply, reducing the likelihood of system failures and costly repairs.
Certificate
Founded in Shanghai in 2010, after years of development and accumulation, it has developed into an outstanding enterprise in the water pump industry integrating R&D, manufacturing, sales and service.




Our Factory
Shanghai Mislier Pump Industry Co., LTD is a company specializing in the research and development, manufacturing, sales and service of water pumps. Founded in Shanghai in 2010, after years of development and accumulation, it has developed into an outstanding enterprise in the water pump industry integrating R&D, manufacturing, sales and service.
In compliance with market development, we continue to strengthen our research and development capabilities. After years of growth, our current main water pump types include vertical pumps, booster pumps, solar pumps, horizontal pumps, pipeline pumps, swimming pool pumps and sewage lifting station, etc., covering a wide range of It is used in rural life, municipal engineering, construction water conservancy, industrial manufacturing and other fields. We have a high-quality professional technical team and a factory base of more than 25 acres, with advanced production technology and equipment, a first-class water pump equipment workshop, and a dedicated water pump product design department. The workshop has large laser cutting machines, CNC punch machines, CNC bending machines, CNC shearing machines, robot automatic welding machines, automatic bending machines, variable pump injection molding machines of different tonnages, and multiple standard assembly lines, with strong water pump design and processing capabilities. We are committed to providing customers with efficient, stable, safe and economical water pump solutions.





FAQ
Q: Is a VFD well pump worth it?
Q: Can I put a VFD on my pool pump?
Q: Do I need a VFD on pump?
Q: What are the benefits of VFD for pumps?
Reduced Maintenance. ...
Minimizing Unexpected Problems And Addressing Water Hammer Issues. ...
Energy Savings. ...
Achieving Energy Savings In Residential Environments. ...
Better Visibility. ...
Solving Problems With Variable Speed Drives.
Q: Should I leave my variable speed pool pump on all the time?
Q: How often should you run a variable speed pool pump?
Q: Can all pumps use a VFD?
Q: What is the difference between VFD pump and normal pump?
By using the VFD water booster pump, you can quickly create a constant-pressure water system with obvious energy-saving effects. Here are the benefits of using VFD pumps. Energy: Compared to traditional pumps, VFD pumps can help you save 20-40% on electricity.
Q: Do you run pool pump while swimming?
Q: How does a VFD control a pump?
Q: What is the purpose of a variable speed drive installed on a pump?
Q: What is the lifespan of a VFD?
Q: What is the life expectancy of a VFD?
Q: Can a VFD slow down a motor?
Q: How long should a variable speed pump last?
Q: How many hours a day should a variable speed pool pump run?
Variable-Speed Pump
With a variable-speed filter pump, that would equate to roughly 8-12 hours, depending on your pool volume by gallons. Most pool owners run their variable-speed pump at different speeds throughout the day but many end up running their pump for an average of 10-12 hours to be on the safe side.
Q: Do I need a pressure tank with a VFD pump?
Q: Which water pump is more efficient?
Q: What is the difference between VFD pump and normal pump?
By using the VFD water booster pump, you can quickly create a constant-pressure water system with obvious energy-saving effects. Here are the benefits of using VFD pumps. Energy: Compared to traditional pumps, VFD pumps can help you save 20-40% on electricity.
Q: How many hours a day should my Pentair pool pump run?
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