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Filter Testing Equipment

 
 
Development path of ZWH (Ziwei Test)
1996

Shenyang Ziwei Electromechanical Equipment CO.,Ltd. was established and started business.

1997

The first domestic plastic pipe pressure resistance burst test bench was developed successfully.
The first domestic valve test bench was developed successfully.

1998

Keep innovating.
The first domestic bathroom nozzle pressure flow test system was developed successfully.

2001

Breakthrough field.
The pilot unit of experimental training base of National Building Energy Conservation Testing Center.

Why Choose Us

Professional Team
ZWH pays great attention to the development of employees, the company has developed to the present day, which has emboldened the loyalty, enthusiasm and creativity of all employees, thus forming a team with appeal, cohesion and centripetal force.


One-stop Solution
We can offer a range of services, from consultation and advice to product design and delivery. It is a convenience for the customers, as they can get all the help they need in one place.


Rich Experience
Dedicated to strict quality control and attentive customer service, our experienced staff is always available to discuss your requirements and ensure complete customer satisfaction.


After-Sale Service
Professional and thoughtful after -sales team, let you worry about us after -sales Intimate service, strong after -sales team support.

First 123 Last

What is Filter Testing Equipment?

 

 

Is mainly used to evaluate the performance and efficiency of Filter Testing Equipment to ensure that they meet the requirements of specific application scenarios. Filter Testing Equipment can be used in a wide variety of applications such as air quality control, water treatment, automotive industry, biomedical and food industry.
The quality of air we breathe is continuously being improved by using Filter Testing Equipment. Filter Testing Equipment protect firefighters from inhaling harmful gases, and help protect humans from air pollution in general.

Benefits of Filter Testing Equipmen

 

Improved Equipment Lifespan
By identifying and addressing contamination issues early, Filter Testing Equipment can extend the lifespan of equipment and components. Contaminants can accelerate wear and tear on critical parts, leading to premature failure. Proper maintenance based on Filter Testing Equipment results can mitigate this risk.

 

Enhanced System Efficiency
Clean fluids and air are essential for maintaining the efficiency of mechanical systems. Clogged or dirty filters can lead to reduced system performance and increased energy consumption. Filter Testing Equipment ensures filters are changed at the right time, minimizing system downtime and energy waste. Filters that are plugged can and do lead to by-pass.

 

Reduced Environmental Impact
Proper Filter Testing Equipment helps prevent leaks and spills of contaminated fluids, which can have adverse environmental effects. By ensuring filters are changed or cleaned when necessary, Filter Testing Equipment contributes to environmentally responsible operations.

 

Increased Safety
In some industries, equipment reliability is critical for safety. For example, in aviation, hydraulic systems must operate flawlessly to ensure safe flight. Filter Testing Equipment helps maintain the reliability and safety of critical equipment.

Type of Filter Testing Equipment
Air Filter Performance Test Bench
Air Filter Performance Test Bench
Air Filter Performance Test Bench
Air Filter Performance Test Bench

Gravity Filtration Equipment
Gravity filtration equipment uses the hydrostatic pressure of a pre-filter column above the filter surface to generate the flow of the filtrate. Common products include bag filters, gravity nutsches, and sand filters.


Bag Filter
Bag filters are used mainly as collection equipment. They use bag-shaped woven-fabric or felt filters. Bag filters are not recommended for process filtration.


Sand Filter
The sand filter is the most common type of gravity filter. It is constructed of a tank containing layers of gravel and sand or pulverized anthracite. The size of the bed particle decreases from bottom to top of the bed. This granular bed forms the filter media. Sand filters are clarifying equipment used, although a cake may form on the surface. They are used almost exclusively for water conditioning.


Vacuum Filtration
Vacuum filtration is a category of liquid-solid separation equipment and filtration equipment that encompasses many different types of products. Vacuum filters are available in batch (vacuum nutsches and vacuum leaf filters) and continuous (drum filters, disk filters and horizontal filters) operating cycles. Continuous vacuum filters are widely used in the process industry. The three main classes of continuous vacuum filters are drum, disk, and horizontal filters.


Pressure Filtrationfiltration Equipment
Pressure filters operate at superatmospheric pressures at the filtering surface. The media is fed to the machine by diaphragm, plunger, screw and centrifugal pumps, blowcase,s and streams from pressure reactors. Most pressure filters are batch, or semi-continuous, machines. Rotary drum pressure filters and some others have continuous operating cycles. Continuous machines are more expensive and less flexible than batch machines.

How do I test my Filter Testing Equipment for Integrity?
 

There are several ways Filter Testing Equipment can be tested for integrity. The most common and effective tests are discussed below. Regardless of which test you use, the cartridge filter must be fully wetted. Here is an example of the pre-wetting procedure.

Forward Flow Diffusion Test

Most filter manufacturers use a Forward-flow Diffusion Test as a final test before product release. This involves making sure the filter is properly wet out (usually with water but could be done with alcohol/water mixtures for hydrophobic Filter Testing Equipment), then applying a controlled upstream pressure somewhat below the bubble point of the membrane. This allows diffusional flow through the liquid layer but no bulk flow through open pores. This diffusional flow rate is validated against bacteria retention to ensure sterilizing or bioburden reduction performance.

In-process this is accomplished by installing a high-purity pressurized air (or nitrogen) line upstream of the Filter Testing Equipment to be tested. After installing and flushing the Filter Testing Equipment, the specified pressure is applied and the flow rate is measured. This can be performed manually by installing a mass flow meter in the airline, allowing the air flow rate to stabilize and recording the value to ensure it meets the filter manufacturer’s specifications. For installations requiring frequent integrity testing (i.e. pre- and post-every batch), an automated integrity test system (available from several suppliers) can be installed.

Pressure Decay Test

A simpler integrity test for less critical applications is a Pressure Decay Test. This requires the same air (or nitrogen) source and an accurate pressure gauge but does not require a mass flow meter. To perform this test, after the Filter Testing Equipment are installed and flushed, a specified pressure is applied to the Filter Testing Equipment, and the air feed valve is closed. After a defined time interval, the pressure is noted, and the pressure decay is calculated (initial pressure minus final pressure). The allowable pressure decay to guarantee integrity could vary depending on the type and number of Filter Testing Equipment installed. This test again relies on the diffusional flow allowed at a defined pressure below the bubble point (hence the drop in upstream pressure), and the allowable pressure decay is calculated accordingly.

Bubble Point Test

Another option for testing integrity is measuring the bubble point of a filter. This is more typically performed on Filter Testing Equipment before installation into the system, but proper plumbing could be performed after installation as well. Measuring the bubble point requires installing the filter(s) into a housing, and making sure they are fully wet out with the required fluid (usually water for hydrophilic Filter Testing Equipment or an alcohol/water mixture for hydrophobic Filter Testing Equipment). The housing is connected to an upstream air source, and the downstream line is directed into a vessel containing water in which bubbles could be seen. The upstream pressure is slowly increased until a steady stream of bubbles is noted in the downstream vessel.

What is the Purpose of Filter Testing Equipment?

Filter testing equipment is mainly used to evaluate the performance and efficiency of Filter Testing Equipment to ensure that they meet the requirements of specific application scenarios. Filter Testing Equipment can be used in a wide variety of applications such as air quality control, water treatment, automotive industry, biomedical and food industry. Depending on the application, the objectives of filter testing equipment can be various: 

 

Testing Filtration Efficiency: This is a basic test that essentially evaluates the efficiency of a filter in removing particles of a specific size or other contaminants. This may involve testing aerosol filtration efficiency for air Filter Testing Equipment, or particulate filtration efficiency for water Filter Testing Equipment.

 

Testing Of Multiple Modes Of Filtration: For example, some advanced test equipment can test two different modes of filtration, adsorption filtration and mechanical filtration, simultaneously. This can analyse in detail the performance of the filter in dealing with complex situations.

 

Pressure Resistance And Flow Rate Test: By measuring the performance of the filter under a specific flow rate or pressure, the pressure resistance and optimal working parameters of the filter can be evaluated.

 

Life And Clogging Test: Some test equipment can simulate repeated filtration operations during actual use to measure the life of the filter and how long it takes for problems such as clogging to occur.

 

Structural Integrity Testing: During filter production, test equipment can be used to detect the presence of defects in the physical construction of the filter, such as cracks or tiny perforations.
The needs of each filter application scenario may vary, so selecting the right test equipment and conducting proper test analysis is critical to ensure that filter testing equipment performs as expected in real-world use.

How Filter Testing Equipment Works

When theFilter Testing Equipment is working, the water to beFilter Testing Equipmented enters the water inlet, flows through theFilter Testing Equipment screen, and enters the pipeline required by the user through the outlet for process circulation. The particulate impurities in the water are trapped inside theFilter Testing Equipment screen.

 

With such a continuous cycle, more and more particles are trapped, and the filtration speed becomes slower and slower. However, the imported sewage continues to enter, and theFilter Testing Equipment holes will become smaller and smaller, thus creating pressure between the inlet and outlet. When the differential pressure reaches the set value, the differential pressure transmitter transmits an electrical signal to the controller. The control system starts the drive motor to drive the shaft to rotate through the transmission assembly. At the same time, the sewage outlet opens and is discharged from the sewage outlet.

 

When theFilter Testing Equipment After cleaning, the pressure difference drops to the minimum value, the system returns to the initialFilter Testing Equipmenting state, and the system operates normally.

 

TheFilter Testing Equipment consists of a shell, a multi-elementFilter Testing Equipment element, a backwash mechanism, and a differential pressure controller. The diaphragm in the housing divides the inner cavity into upper and lower chambers. The upper chamber is equipped with multipleFilter Testing Equipment elements, which fully enriches theFilter Testing Equipmenting space and significantly reduces the volume of theFilter Testing Equipment. A backwash is installed in the lower chamber. Suction cups.


During operation, the turbid liquid enters the lower chamber of theFilter Testing Equipment through the inlet, and then enters the inner chamber of theFilter Testing Equipment element through the partition hole. Impurities that are larger than the gap in theFilter Testing Equipment core are trapped, and the clean liquid passes through the gap to the upper chamber and is sent out from the outlet. TheFilter Testing Equipment adopts a high-strength wedge-shapedFilter Testing Equipment screen and automatically cleans theFilter Testing Equipment element through pressure difference control and timing control.

 

When impurities in theFilter Testing Equipment accumulate on the surface of theFilter Testing Equipment element, causing the inlet and outlet pressure difference to increase to the set value, or when the timer reaches the preset time, the electric control box sends a signal to drive the backwash mechanism.

 

When the backwash suction port is directly opposite theFilter Testing Equipment element inlet, the drain valve is opened. At this time, the system is depressurized and drained. A negative pressure zone appears inside the suction cup and theFilter Testing Equipment element with a relative pressure lower than the water pressure outside theFilter Testing Equipment element, forcing part of the net circulating water to flow from theFilter Testing Equipment element. The outside flows into the inside of theFilter Testing Equipment element, and the impurity particles adsorbed on the inner wall of theFilter Testing Equipment element flow into the grate plate with the water and are discharged from the drain valve.

 

The specially designedFilter Testing Equipment creates a jet effect inside theFilter Testing Equipment element, and any impurities will be washed away from the smooth inner wall. When the pressure difference between the inlet and outlet of theFilter Testing Equipment returns to normal or the timer setting time expires, during the entire process, the material does not flow and backwashing consumes less water, achieving continuous and automated production.

 

The water to be treated by theFilter Testing Equipment enters the body through the water inlet, and the impurities in the water are deposited on the stainless steelFilter Testing Equipment, resulting in a pressure difference. The pressure difference change between the inlet and outlet is monitored through the pressure difference switch. When the pressure difference reaches the set value, the electronic controller sends a signal to the hydraulic control valve to drive the motor.

 

After the equipment is installed, technicians will debug it and set the filtration time and cleaning conversion time. The water to be treated enters the body from the water inlet, and theFilter Testing Equipment starts to work normally. When the preset cleaning time is reached, the electric controller supplies the hydraulic control valve. , drive motor signal, triggering the following actions: the motor drives the brush to rotate, cleaning theFilter Testing Equipment element, and at the same time, the control valve opens for sewage discharge.

Precautions when using Filter Testing Equipment

 

 

Before using theFilter Testing Equipment, you must check whether the accessories and sealing rings are complete and whether they are damaged, and then install it as required.


The new filter must be cleaned with detergent (please do not use acid cleaning). After cleaning, use high-temperature steam to sterilize and disinfect the cleaned filter.

Well, avoid contamination.


When installing the Filter Testing Equipment, do not connect the inlet and outlet in reverse. The port on the edge of the filter bottom plate is the liquid inlet, and the pipe connected to the filter element socket is the clean liquid.

New filter elements are packaged in plastic bags by the manufacturer in a clean production plant. Do not tear the plastic packaging when not in use. Use filter elements with higher requirements.
After installation, it must undergo high-temperature steam sterilization.


When the filter element is inserted into the port, the filter element must be vertical. After inserting into the port, the pressure plate holds the tip fins and the screws are tightened until they stop. Filter element inlet for 226 interface


Finally, it should be rotated 90 degrees and clamped. This is the key to installation. If you are not careful, the sealing will not be achieved, water will leak easily, and the use requirements will not be met.


When the filtered liquid enters, the bleed switch on the filter should be turned on to allow the liquid to fill the column, otherwise the filtration effect will not be good.


When filtering, the pressure used is generally around 0.1MPa, which is enough to meet production needs. As time and flow increase, the micropores of the filter element will become clogged.
Plug, the pressure increase should generally not exceed 0.4MPa, and the maximum should never exceed 0.6MPa. Otherwise, the filter element will be damaged or punctured.


When backwashing the filter element, be sure to use sterile water, otherwise it will contaminate the filter element. Backflush method, the original outlet is changed into the inlet, and the sterile water is poured in in the opposite direction (note that It is advisable to close the original liquid filtration pipeline) and open the sewage outlet. The operator will see that the filtrate is obviously improved.


When the production is completed and not in use, try to drain the filtrate. The downtime is not long. Generally, do not open the machine. Do not unplug the filter element. If the downtime is long or the filter
The liquid should not be stored overnight. The filter element and filter must be cleaned when the machine is shut down (you can also use the backflush method).


For optional matching, pay attention to the required flow, pressure, and pump lift. Generally, vortex pumps, infusion pumps, etc. are suitable for selection. Centrifugal pumps
Pump is not suitable.

 
Our Factory

 

Development path of ZWH (Ziwei Test)
1996: Shenyang Ziwei Electromechanical Equipment CO.,Ltd. was established and started business.
1997: The first domestic plastic pipe pressure resistance burst test bench was developed successfully.
The first domestic valve test bench was developed successfully.
1998: Keep innovating.
The first domestic bathroom nozzle pressure flow test system was developed successfully.
2001: Breakthrough field.
The pilot unit of experimental training base of National Building Energy Conservation Testing Center.

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Certificate
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FAQ
 

Q: What is filter testing equipment used for?

A: Filter testing equipment is utilized to evaluate the efficiency and performance of filters designed to remove particulates, contaminants, or impurities from air, liquid, or gas streams.

Q: How does filter testing equipment determine filtration efficiency?

A: By passing a known concentration of test particles through the filter and measuring the concentration of particles in the effluent stream, the equipment calculates the filtration efficiency based on the reduction in particle count.

Q: What types of filters can be tested with this equipment?

A: Air filters, liquid (water) filters, HEPA (High-Efficiency Particulate Air) filters, industrial particulate filters, and many others can be tested for their filtration capabilities.

Q: Can this equipment be used to test filters for biological contaminants?

A: Yes, some filter testing equipment can be adapted or specifically designed to assess the effectiveness of filters against biological agents like bacteria, viruses, and fungi.

Q: What is the importance of maintaining calibration on filter testing equipment?

A: Accurate results depend on properly calibrated equipment. Regular maintenance ensures that measurements remain precise and reliable, which is critical for quality control and meeting regulatory standards.

Q: What factors affect the selection of filter testing equipment?

A: Factors include the type of filter media, the size of particles to be filtered, the required flow rate, the test aerosol used, and the specific performance characteristics being evaluated.

Q: What is the role of aerosol generators in filter testing?

A: Aerosol generators produce a consistent and measurable distribution of test particles, which are necessary for accurate assessment of filter performance.

Q: How often should filter testing equipment be serviced?

A: The service interval depends on the frequency of use and the manufacturer's recommendations. Typically, preventative maintenance should be performed annually or as per usage logs.

Q: Can filter testing equipment be integrated into existing quality control processes?

A: Yes, filter testing equipment is designed to be integrated into manufacturing and quality control workflows to ensure that filters meet the required performance standards.

Q: What is the significance of real-time monitoring in filter testing?

A: Real-time monitoring allows for immediate feedback on filter performance during testing, which helps identify issues and make adjustments promptly, enhancing overall testing efficiency.

Q: What is the typical lifespan of filter testing equipment?

A: The lifespan of filter testing equipment varies depending on the quality of the equipment, the frequency of use, and the level of maintenance provided. High-quality, well-maintained equipment can last for several years.

Q: What support do manufacturers provide for filter testing equipment?

A: Manufacturers typically offer installation services, operator training, maintenance support, repair services, and sometimes software updates to ensure the longevity and accuracy of their equipment.

Q: What is the impact of environmental conditions on filter testing?

A: Environmental factors such as temperature, humidity, and airflow can influence test results. Therefore, filter testing equipment is often housed in controlled environments to minimize variability.

Q: What role does data logging play in filter testing?

A: Data logging records all pertinent test parameters and results, which is essential for tracking performance trends, conducting historical comparisons, and meeting regulatory reporting requirements.

Q: Can filter testing equipment be automated?

A: Many modern filter testing systems are partially or fully automated, which reduces the potential for human error, increases testing throughput, and allows for more complex test protocols to be executed.

Q: What is the process for certifying a new filter design with filter testing equipment?

A: Development of a new filter design involves rigorous testing to meet specified performance criteria. Once the filter meets the required standards, it can be certified for commercial use.

Q: What is the difference between qualitative and quantitative filter testing?

A: Qualitative tests provide a pass/fail result based on visual inspection, while quantitative tests provide numeric data on filtration efficiency and other performance metrics.

Q: What advancements are being made in filter testing equipment technology?

A: Advancements include improved aerosol generation techniques, higher precision measurement tools, enhanced automation, and integration with Internet of Things (IoT) technologies for remote monitoring and analysis.

Q: What is a filter test?

A: The goal of liquid filtration testing is to remove solid particles from a liquid. Since filtration is the process of removing particles from a fluid, particle counters are a tool frequently used to test the functioning of the filter.

Q: What is the purpose of filter integrity test?

A: Integrity testing sterilizing filters after a batch has been filtered can detect if the integrity of the filter has been compromised during the process. Detecting a failed filter alerts operators to a problem immediately after batch processing, eliminating delay and allowing rapid reprocessing.

We're well-known as one of the leading filter test equipment manufacturers and suppliers in China for our cheap products and good service. Please feel free to buy customized filter test equipment at competitive price from our factory.

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