Filter presses result in the driest cake with the cleanest filtrate when compared to other dewatering equipment for a respective application. Proper selection of cloths, plates, pumps and ancillary equipment/process, such as precoat, cake wash and cake squeeze is critical to optimal operation of the dewatering system.
Filter presses are proven effective on hundreds of applications across many markets and are capable of dewatering particle sizes down to 1 micron. They can be easily sized for a full range of capacities from .25cuft to 1000cuft and remove up to 99% of suspended solids.
See product videos related to filter press accessories and material handling solutions: click here.
Current customers of our filter presses, industrial dryers and traveling water screen assemblies can take advantage of our ToolDox Portal. Your equipment is serialized and comes with specific drawings and specifications. Access them online to request parts through an easy user interface. Click on the link below to learn more.
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J-Press® Plate Shifters are engineered systems to provide efficient cake removal.
Control Panels, the right controls for the right job.
Safe, effective hydraulic systems for filter pressses of all sizes
We provide a full range of custom-build accessories and material handling solutions for your filter press and other equipment. View the gallery on the right. Watch filter press accessory videos.
Safety is important which is why we provide a variety of options for filter presses.
Carefully chosen filter cloths are critical to proper filtration and dewatering
The correct filter plate is critical to the dewatering process
J-Press® Overhead Filter Press is the State-of-the-Art Filter Press engineered to meet your specific dewatering application needs
High-performance solution for higher capacity dewatering operations
Versatile dewatering device ideal for larger throughput which can withstand the harshest of environments.
Self contained mobile dewatering system designed for rugged conditions
Cost-effective solution for producing high solids filter cake with extremely high clarity in the liquid effluent.
Mainly for the oil industry, a lightweight, compact filter press containing an integral skid and roll bars
We know what a filter press does, but what happens between the plates, inside the chambers?
Look Inside!This can vary greatly depending on your process and application. It can be anywhere from 10 minutes to 10 hours or more. We can do a test to determine the answer for your specific application. For a quote on testing, we require a completed data form.
This depends on your process. Cloth selection is as much an art as it is a science. Based on our 1,000 years of combined experience and lab testing, we can make an expert recommendation to you. We supply cloths based on criteria you give us and based on sample processing we do in our lab. Should your process change, we recommend that your cloth type be evaluated for suitability.
The following is general information to help you understand cloths and how they work. For detailed questions, call our customer service department at 800.245.3006.
Cloths for non-gasketed plates are hung over the plate, extending from top to bottom, and are held in place by eyelets that fit over the cloth-pins on top of the plates. With the non-gasketed plate, the filter cloth provides the seal between the plates. Leakage will occur during operation even though Evoqua supplies the non-gasketed plate cloths with latex edging. The latex will cut down the wicking action somewhat, but will not eliminate it.
The gasketed plate allows less leakage than the non-gasketed plate due to an O-ring seal around the chamber and filtration ports. The gasketed cloth has a high-density sash cord sewn around the cloth's perimeter that is caulked into a groove on the plate.
The type of cloth used is determined by the type of process or application performed by the filter press, the operating environment, and the performance required by the filtering media (filter cloths).
The filter cloths come in many different materials including polypropylene, polyester, cotton, and other synthetic materials. The cloths are made from monofilament fibers, multifilament fibers, or spun fibers. The smooth surface characteristic of monofilament fibers can help to improve cake release properties. The uniform circumference of monofilaments also enables fabrics to be produced with consistent pore sizes. Multifilament and spun fibers are produced by twisting several smaller diameter monofilament fibers together into a single strand. They are used to produce fabrics that require a very tight weave and fabrics where high flow rates are not critical.
Filter cloths also come in many different styles of fabric weave.
Mesh opening or pore size is also an important consideration when selecting the proper filter cloths for a particular application. The mesh opening or pore size is determined by the number of fibers, size of the fiber, and the type of weave. These factors in turn govern flow rates, particle retention, and the strength of the fabric itself. As shown below, these two fabrics, having the same type of open area, will have similar flow rates, but the fabric on the left will retain finer particles.
This is difficult to determine from just looking at your filter cloth. The question assumes you bought your filter press from us, in which case we will have your information on record.
Call us with your serial number at 800-245-3006.
If you did not buy your filter press from us and you have questions about your cloth you should still call the number above, and we can walk you through some steps to help figure out your problem. We can also send slurry samples to our in-house lab to help assess your situation. Call us for a conversation.
There is no micron rating on filter cloths. They are rated by air permeability.
It depends on your process, but general guidelines are as follows:
Up to 5 cu. ft. 1" air operated diaphragm pump
5 to 15 cu. ft. 1½" air operated diaphragm pump
15 to 25 cu. ft. 2" air operated diaphragm pump
25 to 50 cu. ft. 3" air operated diaphragm pump
50 cu. ft. and above multiple pumps
We furnish a full line of feed pumps. Please call our customer service department at 800-245-3006 for your best sizing and price.
It depends on your process, but general guidelines are as follows:
A 1" pump should have a 5 hp compressor.
A 1½" pump should have a 10 hp compressor.
A 2" pump should have a 12-15 hp compressor.
A 3" pump should have a 20 hp compressor.
Changes in chemical and physical treatment may alter the performance of your filter press. We can assist you in optimizing your press performance by performing lab testing. Please contact our customer service department at 800-245-3006.
This usually means it is time to clean your filter cloths.
Possible causes are:
Dirty filter cloths. What to do: clean or replace filter cloths.
Malfunctioning (low) feed pump. What to do: clean and adjust as needed.
Incorrect treatment or treatment change. What to do: contact customer service at 800-245-3006.
It depends on:
The amount of opening space left in your press
How much clean-out space you want to sacrifice
If your press has an expansion piece
You may be able to buy new, longer sidebars if you have a bolt-on style press.
Call customer service at 800-245-3006.
Safely, none.
We can provide you with a back-up plate if you need to reduce the capacity of your press.
Call customer service at 800-245-3006.
This is difficult to determine from just looking at your filter cloth. The question assumes you bought your filter press from us, in which case we will have your information on record.
Call us with your serial number at 800-245-3006.
If you did not buy your filter press from us and you have questions about your cloth you should still call the number above, and we can walk you through some steps to help figure out your problem. We can also send slurry samples to our in-house lab to help assess your situation. Call us for a conversation.
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