Selection of Feed Pumps For Filter Press


A feed pump is a type of pump that controls the rate at which a fluid, like fuel, is moved. A low-pressure feed pump makes sure that filtered fuel is delivered continuously to the injection pump. The fuel feed pump only activates when the engine is running. The most widespread feed pumps are centrifugal, screw, core, diaphragm, plunger pumps, etc. Commonly most of the pumps used in industry are centrifugal pumps, which include common pumps, stainless steel pumps, mud pumps, slurry pumps, corrosion-resistant plastic pumps, etc.

What is a Filter Feed Pump?

A typical piece of filtration and separation equipment that is used in mining, sludge, food, and other industries is the filter press. Since the early 18th century, it has been extensively used in the chemical industry, pharmacy, metallurgy, dyestuff, food, brewing, ceramics, and other industries.

Sujal New Filter Press Pumps 2022

These feed pumps are high-pressure pumps and basically of two types:

  • Positive Displacement Feed Pumps
  • Centrifugal Feed Pumps

Commonly, a supporting feeding pump must be used with a filter press. But how many different kinds of feed pumps exist? What are the guidelines for choosing the filter press pump? How do you choose the appropriate feed pump for a filter press?  Want to know how then keep reading the blog.

Features of Filter Press Pump:

  • Easy maintenance with replaceable parts:

These pumps are easy to maintain due to the feature of replaceability and interchangeability.

  • Specially designed for the positive suction head:

These pumps are specially designed on positive suction technology due to which they intake fluid from one side without reverting back. 

  • Long-life due to replaceable wearing parts:

Feed pumps have a long life cycle due to the replaceability factor as well as the factor of most latest and most robust design.

Working Principle of Filter Press Pump:

Filter presses are a pressure filtration method, therefore when the filter press feed pump increases pressure, particles accumulate within the chambers until they are entirely full of solids. Once the chambers are full, the cycle is complete and the filter cakes are ready to be released.  Also, many higher capacity filter presses use fast-action automatic plate shifters which speed cycle time. Some filter presses are specifically designed for fully automatic, 24-hour operation in harsh environments such as mines or chemical manufacturing plants.

Filter presses work in the direction of sludge being pumped into the machine so that solids are distributed smoothly during the cycle. The filter cake is formed when solids accumulate on the filter fabric; the filtrate leaves the filter plates via the intersection ports into the numerous, delivering clean filtered water.

Filter presses use a force filtration method, so as the filter press feed pump increases pressure, solids accumulate within the compartments until they are completely full of solids, forming the cake. The cycle is complete when the compartments are full, and the filter cakes are ready to be released. Fast action automatic plate shifters are used in many higher capacity filter presses, lowering cycle time. Some filter presses are ideally built for fully automated.


How To Choose The Right Feed Pump:

While you are selecting a similar pump for the filter press you must be going through these 3 points:

1. The Filter Area of the Pump:

It’s important to know the filter area of the filter press being used in the working environment, such as 50m², 100m², 200m², 250m², 300m², and more.

Usually, the filter area of the plump is the prime part for the manufacture of a pump. 

According to the requirement, the manufacturer matches the extent of the pump. While you are selecting the feed pump the filter press is the main part of the filter press pump.

2. The Engagement Ratio of Pump:

In accordance with the sludge provided. Customers should supply the engagement ratio of the sludge, to be transported after choosing the type of feed pump, and manufacturers will choose the feed pump materials based on the variable.

3. Material of the Pump:

The materials used in feed pumps include cast iron, common alloy, high chromium alloy, stainless steel, and other materials. If the sludge is not particularly caustic, the high chromium alloy filter press pump is presently the most useful in the market. This type of material has some wear and corrosion resistance. Furthermore, the service life is much longer than that of an iron pump and the price is much lower than stainless steel material.

Things to Consider Before Buying the Feed Pump:

Operating Pressure:

Most filter-press pumps function between 8 and 15 bar, and the pressure must be distributed uniformly for the greatest results. You will need a pump that can manage your specific separation process and generate the requisite constant pressure.

Secondary Pumps:

To run a filter-press pump, several displacement pump systems are often utilized in combination to develop the required pressure. It’s critical to have the correct overall system developed depending on the size of your plant and the processing that has to be done.

Determine the Pump Lift:

Higher the lift of the feed pump, the better it is. When the actual filter pressure exceeds the pressure needed by the filter press, the filter cloth’s service life is frequently reduced.

Environment Condition:

If you work in an industry that has severe environmental laws, selecting the proper pump is important at that time. You must keep away dangerous material from the environment. On the other hand, you must keep outside pollutants out of the pump system. These must be considered when selecting your pump.

Capacity of Pump:

Knowing the type of fluids you are going to use in the pump is one of the good factors. This allows you to decide the type of pump you need. Then you must determine the size and dial in certain pump combinations. You must determine how much you need to process in a day, week, or year and use that information to pick or build a pump system that provides you with the required flow rate.


Sujal Engineering developed the SFP Series of Filter Press Pumps, which are the best in the market. Suspensions are filtered under high pressure using our filter press pump to separate the liquids from the solids. It is at the center of the filter press system.

We utilize the reliable infrastructure and cutting-edge technology to meet the needs of all the industries and attend to the needs of every single person. Therefore, if you’re looking for the best pumps, get in touch with us by clicking here, and a member of our staff will respond with details according to your needs.

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