Leaf Filter Elements

Pressure leaf filter elements are essential components of pressure leaf filters, which are widely used in various industries for liquid-solid separation. Pressure leaf filters consist of a vertical or horizontal vessel with a number of filter leaves inside. The leaf filter elements – filter leaves are made of stainless steel or other corrosion-resistant materials and have fine pores that allow the liquid to pass through while retaining the solid particles. The leaf filter elements are arranged in a vertical or horizontal configuration inside a pressure vessel. The vessel is filled with the slurry (the mixture of liquid and solid particles) to be filtered. The pressure inside the vessel forces the liquid to flow through the mesh, leaving behind the solid particles on the surface of the leaf filter elements. The solid particles form a cake that can be removed by backwashing, scraping, or vibrating the leaf filter elements.

leaf filter elements
leaf filter rescreening and repair

A typical pressure leaf filter elements, which is also called leaf, consists of 3/5/7 layers (ply) of stainless steel wire mesh, binder, nozzle, handle, etc. The 5 layers of metal mesh are 2 layers of dense filter mesh on the surface, 2 layers of support mesh in the middle and 1 layer of drainage mesh in the innermost layer. The leaf closure can be riveted, welded, bolted, or a combination of the above.

Leaf filter elements structure
leaf filter elements working principle

The structure of the pressure leaf filter elements varies depending on the type and application of the pressure leaf filter. However, a typical leaf filter element consists of the following parts:
– A central stem that connects the leaf filter element to the manifold and allows the filtrate to flow out of the vessel.
– A drainage mesh that covers both sides of the stem and provides support for the filter medium.
– A filter medium that covers the drainage mesh and forms the actual filtering surface. The filter medium can be made of woven or non-woven fabrics, metal meshes, or synthetic membranes, depending on the filtration requirements.
– A frame that surrounds the filter medium and provides rigidity and stability to the leaf filter element.
– A gasket that seals the edge of the frame and prevents leakage of the filtrate or the slurry.
The leaf filter elements are designed to provide a large filtration area in a compact space, as well as high filtrate clarity and easy cake discharge. Depending on the type of pressure leaf filter, the leaf filter elements can be arranged vertically or horizontally, and can be equipped with cake breakers or vibrators to facilitate cake removal. The leaf filter elements can also be cleaned or replaced periodically to maintain their performance and extend their lifespan.

Leaf filter elements features

– All sizes and shapes
– Most binders and chambers available
– Suitable for use with both vertical and horizontal pressure leaf filters
– Stainless steel 304(L), 316(L), 904L or super duplex. Other alloy materials on request.
– Leafs engineered for balance and tension
– Exceptional dimensional stability
– Available in different mesh types and layer combinations
– Extensive range of reinforced frame types with riveted, welded or bolted box profiles suited to the application
– Excellent pre-coating properties
– High filtration efficiency, filtrate quality and flux rates
– Five layers (ply) of stainless steel wire mesh design
– The top layer of the screen can be customized to the application
– Leaf re-screening, repair or replacement of filter leaves
– Synthetic Leaf Covers

leaf filter elements
Your benefit

– High filtration capacity: Leaf filter elements can handle large volumes of slurry with high solids content and viscosity.
– High filtration efficiency: Leaf filter elements can achieve high clarity and purity of the filtrate by removing fine particles and impurities.
– Low maintenance: Leaf filter elements are easy to clean and replace, requiring minimal downtime and labor.
– Long service life: Leaf filter elements are resistant to wear, corrosion, and temperature variations, ensuring reliable performance and durability.
– Customization: Leaf filter elements can be customized according to different specifications, such as size, shape, material, pore size, etc.

Leaves from SEPARATECH assuring you of peak filtration performance and the most cost-effective filtering operation.

Vertical pressure leaf filter elements

Vertical leaves are used exclusively in horizontal vessels and most often in vertical vessels. This leaf arrangement allows for quick release of the filter cake and discharge by gravity. Constant flow throughout the cycle is required to maintain cake formation.

Horizontal pressure leaf filter elements

Horizontal leaves are used to permit interrupted flow. During periods of low or zero flow, the cake is held on by gravity. A sluicing discharge is used to wash the cake off the leaves. A tailings leaf is available with this configuration.

Various wire mesh

The Twilled Weave is produced by passing each fill wire alternately over and under two warp wires. The pattern is staggered on successive warp wires, giving the appearance of parallel diagonal lines. This weave allows the use of proportionately heavier wires in a particular mesh count (number of openings per lineal inch) than is possible in plain weave. This cloth has a wide application capable of supporting greater loads and finer filtrations.

The Dutch Weave is produced by the use of coarse mesh (mesh wire, woven wire mesh, wire mesh basket) in the warp and a fine mesh with relatively smaller wire in the fill. This weave results in greater strength with very fine openings and is primarily used as a filter cloth. The shape and position of the openings aid particle retention and increase filter cake formation.

The Plain Weave is the most commonly used and simplest wire cloth weave. Each warp wire (wire running-parallel to length of cloth) passes alternately over and under the wires running traversely through the cloth (fill or shoot wires) at 90 degree angles. It has an extremely wide range of applications.

The Twilled Dutch Weave is produced by a combination of the features of the Dutch Weave and the Twilled Weave. Fill wires are passed alternately over and under two warp wires forming a fine mesh in one direction and a coarse mesh (mesh wire, woven wire mesh, wire mesh basket) in the other. This type of weave is capable of supporting greater loads than the Dutch Weave, with finer openings than the Twilled Weave. It is used in applications where the filtering of heavy material is necessary.

pressure leaf filter elements
leaf filter metal wire mesh
Pressure leaf filter elements manufacturing video
Why choose SEPARATECH for pressure leaf filter elements?

SEPARATECH is a professional manufacturer and supplier of leaf filter elements for various applications. SEPARATECH has more than 20 years of experience in designing, producing, and installing leaf filter elements for pressure leaf filters. SEPARATECH offers:
– High-quality products: SEPARATECH uses advanced technology and equipment to ensure high-quality standards and customer satisfaction.
– Competitive prices: SEPARATECH offers competitive prices for its products without compromising on quality or service.
– Fast delivery: SEPARATECH has a large inventory of ready-made leaf filter elements that can be shipped within 2-4 weeks after order confirmation.
– Customization service: SEPARATECH can customize leaf filter elements according to customer requirements, such as size, shape, material, pore size, etc.
– Technical support: SEPARATECH provides technical support and guidance for customers before, during, and after sales.

If you are looking for pressure leaf filter elements for your pressure leaf filters, look no further than SEPARATECH. Contact us today to get a free quote and consultation. We will help you find the best solution for your filtration needs.

Contact SEPARATECH now for new construction or repair to existing vertical, horizontal, circular or roto-leaves for any model filter.