Pressing Onward: A Dewatering Blog

Learning The Lingo Of Filter Presses

By Michael Stock


Learning_Lingo-1.jpgIn every industry there’s lingo, a whole language known only by those in the industry. And if you don’t know the lingo, it can be difficult to communicate effectively.  Filter presses are no exception.  Whether you’re purchasing a press, ordering spare parts, or troubleshooting, it can be difficult to talk about a filter press if you don’t know the language. 

Here’s a quick guide to help you speak with confidence about your J-Press® filter press:

The Basics

A filter press separates solids from a liquid. The material enters the filter press as sludge/slurry and exits the filter press as cake or filtrate.

  • sludge/slurry: The solids-laden liquid that enters the filter press
  • cake: the solids collected on the filter cloths and are discharged after the filtration cycle
  • filtrate: the liquid that exits the filter press during the filtration cycle


Head vs. Tail

If you’re wondering which end is up: 

The head of the filter press, or the manifold end, is the side where the slurry enters and exits. The head plate is the first plate in the filter pack and can be distinguished by its drainage eyes that go through the entire plate.

The head plate is marked with a single dot on the side to show that it is first in the sequence and continues the pattern of 1 dot, 3 dots, 1 dots, 3 dots…all the way to the end of the filter pack where the tail plate rests.

The tail end of the press, or the follower end, is the opening and closing end of the press.  The tail plate is the last plate in the filter pack and may or may not have a feed eye going through it (depending on whether your filter press is equipped with double-end feed). The tail plate can be marked with either a single dot or three dots depending on the number of plates in the filter pack.


The Body

The body of the basic J-Press® filter press is made up of two main components—the filter pack and the skeleton (or press frame).

  • The press frame (or the skeleton) holds the filter pack together against the pressure developed during the filtration process. The press frame is made up of the stationary head, the follower, the cylinder bracket and the sidebars
  • The sidebars run the length of the press and support the filter plates. Overhead style presses do not have sidebars; they have an overhead support beam
  • The stationary head is the end of the press where the manifold piping is located, and the slurry is pumped through the press.
  • The follower (also known as the movable head) is what opens and closes the filter press. It pushes the filter plates toward the stationary end and creates the pressure needed to run the filtration cycle.
  • The filter pack is where the actual liquid/solid separation process takes place. It is made up of filter plates and filter cloths.

Lingo-overhead-pres.jpgOverhead filter press

On the tail end of the press is the hydraulic unit, which controls the follower during opening and closing.

  • The cylinder bracket is the leg located on the tail end of the filter press. It holds the hydraulic cylinder and the control package.
  • The hydraulic pumping unit holds the hydraulics that power the hydraulic cylinder to push the follower, which opens and closes the filter press.

regardless of your industry or application we speak your language! we know dewatering equipment better than anyone, and have worked with almost every process. call (844) 450-2920.

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