Online Filter Press

Description

An industrial filter press is a high-performance mechanical system designed for efficient solid-liquid separation via pressure filtration. Across demanding sectors—such as wastewater treatment, chemical processing, mining, and pharmaceuticals—this heavy-duty equipment plays a pivotal role in dewatering slurries, recovering valuable materials, and purifying liquids. Understanding how a filter press functions, its operational phases, and its core engineering advantages helps industrial operators optimize facility workflows and achieve maximum cost-efficiency.

How an Industrial Filter Press Works: The Mechanics of Pressure Filtration

The core function of a filter press revolves around utilizing applied pressure to segregate liquid and solid phases from a heterogeneous mixture. The step-by-step operational cycle unfolds through distinct mechanical phases:

Slurry Feeding: A specialized heavy-duty industrial pump feeds a pressurized slurry (a suspension of solid particles in a liquid matrix) into the filter assembly.

Chamber Pressurization: The slurry fills sequential, sealed chambers created by interlocking filter plates covered with specialized industrial filter cloths (available in materials like polypropylene, polyester, or nylon).

Filtration and Cake Building: Under intense pressure driven by a hydraulic clamping system, the liquid component (filtrate) passes seamlessly through the porous filter cloth, leaving the solid particles trapped inside. These accumulated solids form a dense layer known as a filter cake.

Discharge and Cycle Reset: Once the chambers reach capacity and maximum dryness is achieved, the hydraulic system retracts the plates. The solid filter cake is discharged either manually or via automated mechanical systems, readying the unit for the next run.

Salient Features of Online Filter Press

The cartridge does not need to be lifted for routine servicing; only the cover requires lifting.
Built in strict compliance with the latest industry standards and engineering excellence.
Offered in plate diameters of 4, 8, 14, 18, 24, and 33 inches.
Compatible with centrifugal, gear, or lobe pumps.

Equipped with a built-in pressure gauge, safety valve, and air vent.
Delivers exceptional, crystal-clear filtration results.
All product-contact components are manufactured from SS 304, SS 316, or SS 316L.
Leaves minimal hold-up of unfiltered slurry to significantly boost overall productivity.

Working Principle of Online Filter Press

Filtration Process

Feed and Pressure: Liquid enters the machine’s filter under positive pressure.

Downward Flow: The fluid moves downward, passing through side openings in the filter plates.

Separation: The filter media traps impurities, allowing only the clean filtrate to enter the central channel—formed by interlocking pressure cups linked to the outlet.

End of Cycle: Filtration proceeds until the cake capacity reaches saturation or the filtration rate drops significantly due to a decrease in cake resistance.

Product Advantages

Cost-Efficient: Our meticulously engineered filter press offers high economic value.

High Efficiency: Dependable and designed to prevent waste, ensuring every drop is recovered.

Technical Specifications of Online Filter Press

Diameter of Plate	No. of Plates	Output LPH	Plate Height	Filtering Area m²	Cake Holding Space m³	Motor	Size of Pump	Plate Thickness
8	4	250	25mm	0.1507	0.002893	1 H.P.	½”	1.2mm
8	6	400	25mm	0.1886	0.004340	1 H.P.	½”	1.2mm
8	8	500	25mm	0.2260	0.00579	1 H.P.	½”	1.2mm
14	8	1000	38mm	0.6130	0.02778	2 H.P.	1″	1.2mm
14	10	1200	38mm	0.7960	003472	2 H.P.	1″	1.2mm
18S	8	2500	50mm	1.160	0.05007	3 H.P.	1 ½”	1.5mm
18D	15	5000	25mm	2.169	0.04050	3 H.P.	1 ½”	1.5mm
18D	12	4000	50mm	1.745	0.07801	3 H.P.	1 ½”	1.5mm
18S	23	7000	25mm	3.338	0.06349	3 H.P.	1 ½”	1.5mm
24D	10	9000		2.53	0.14256	5 H.P.	2″	1.5mm
24S	18	16200		4.37	0.1132	5 H.P.	2″	1.5mm
24D	13	11700		3.22	0.18533	5 H.P.	2″	1.5mm
24S	24	21000		5.75	0.15081	5 H.P.	2″	1.5mm

Note:

The flow rate is mentioned in terms of water with 5% activated carbon with filter media as polypropylene cloth.
Filtration rated depends on viscosity of liquids, quality of filter pads and nature of sediments in liquid to be filtered.

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.

Types of Filter Press

Zero Hold Up Filter Press

Sprkler Filter Press

Stainless Steel Filter Press

Pharmaceutical Filter Press Machine

GMP Filter Press Machine

Sugar Syrup Filter Press

Applications of Other Machines

Pharmaceutical Industry
Nutraceutical Industry
Herbal Industry
Ayurvedic Industry
Biotech Industry
Cosmetic Industry
Chemical Industry

Optional Features of Online Filter Press

Flame Proof Motor & Starter.

Viewing Glass & Sampling Port.

PU Wheels.

Filter Media as per client’s requirements.

Key Features of Online Filter Press

Closing the Press — Hydraulic or manual systems clamp a series of filter plates together, creating sealed chambers lined with filter cloths.

Filling — A pump feeds the slurry into the chambers under increasing pressure.

Filtration — Liquid passes through the cloths and exits via ports, while solids build up as a cake in the chambers.

Cake Drying (Optional) — Air or water may blow through to further dewater the cake.

Opening and Discharge — Plates separate, and the dry cakes drop out for removal.

Cycle Repeat — The process is batch-based, with cycles lasting 30 minutes to several hours depending on the material.

This results in very dry cakes (often 25–40% moisture or lower) and clear filtrate, making it efficient for dewatering.

FAQ for Online Filter Press

What is an Online Filter Press?

An Online Filter Press is a high-performance industrial mechanical system designed for efficient solid-liquid separation through pressure filtration. It is used to dewater slurries, recover valuable materials, and purify liquids in demanding sectors such as wastewater treatment, chemical processing, mining, and pharmaceuticals.

How does an Online Filter Press work?

The process involves several phases: a heavy-duty pump feeds pressurized slurry into sealed chambers formed by interlocking filter plates covered with filter cloths. Under hydraulic pressure, liquid (filtrate) passes through the cloth while solids form a dense filter cake. Once full, the plates open and the cake is discharged (manually or automatically), ready for the next cycle.

What are the key salient features of the Online Filter Press?

Key features include easy servicing (only the cover needs lifting, not the cartridge), compliance with the latest industry standards, availability in plate diameters of 4, 8, 14, 18, 24, and 33 inches, compatibility with centrifugal/gear/lobe pumps, built-in pressure gauge/safety valve/air vent, crystal-clear filtration results, SS 304/316/316L product-contact parts, and minimal hold-up of unfiltered slurry for higher productivity.

What materials are used for the product-contact parts?

All product-contact components are manufactured from high-grade stainless steel—SS 304, SS 316, or SS 316L—to ensure corrosion resistance, durability, and suitability for hygienic applications.

What plate sizes and configurations are available?

The Online Filter Press is offered with plate diameters of 4, 8, 14, 18, 24, and 33 inches. Different models vary in the number of plates, filtering area, cake-holding capacity, motor power, and pump size to match various output requirements (measured in LPH).

What is the working principle of the filtration process?

Liquid enters under positive pressure and flows downward through side openings in the filter plates. Filter media traps impurities while clean filtrate moves into a central channel formed by interlocking pressure cups linked to the outlet. Filtration continues until cake capacity is reached or the rate drops significantly due to increased resistance.

What are the main advantages of using this Online Filter Press?

It is cost-efficient with high economic value and delivers high efficiency by preventing waste and recovering every drop of filtrate. It produces very dry filter cakes (often 25–40% moisture or lower) and clear filtrate, optimizing industrial workflows and reducing operational costs.

In which industries is the Online Filter Press commonly used?

It is widely applied in the pharmaceutical, nutraceutical, herbal, Ayurvedic, biotech, cosmetic, and chemical industries, as well as wastewater treatment, mining, and other processes requiring reliable solid-liquid separation.

How is the filter cake discharged and what is the typical cycle?

After filtration, the hydraulic system retracts the plates. The solid cake is discharged either manually or by automated systems. The process is batch-based, with cycles lasting from about 30 minutes to several hours depending on the material being filtered. Optional air or water blow-through can further dry the cake.

What factors affect the filtration rate and output?

Flow rates (given for water with 5% activated carbon using polypropylene cloth) depend on the viscosity of the liquid, the quality of the filter media/pads, and the nature of the sediments. Power voltage can be adjusted to meet local requirements, and technical specifications may be modified as needed.