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LIDERING
Paper Industry

Paper Industry

Product catalog summary

Overview: The document provides detailed information on various mechanical seals and components used in the paper industry, focusing on their applications, specifications, and the processes they support.

Mechanical Seals: The document describes several mechanical seals designed for specific applications in the paper industry. These include:

LDC40-F/LDC40C: Variants designed for high recirculation of production fluid.
LMS24: Designed for fan pumps handling water and pulp mixtures.
LSC90: Single cartridge seal for paste-like products, used in digesters and pumps.
LWS30/LWS30A: Wave spring seal for condensate pumps and mixers.
LSC40-FQ: Quench system for lubrication and cooling, used in digesters and vacuum pumps.
LMS10D/LDC90: Double cartridge seal for bleaching towers and pulp applications.
LMB85 LRB17: Rubber bellow seal for simple fluid transfer applications.

Fabrication Process: The document outlines the paper manufacturing process, highlighting the role of mechanical seals in various stages:

Grinder: Converts wood into chips.
Digester: Removes lignin using white liquor at high temperatures and pressure.
Chemical Recovery: Concentrates and burns black liquor to generate steam.
Screen: Separates impurities from fibers under specific conditions.
Washing: Removes chemical traces from the paste.
Storage Towers: Stores processed pulp, ensuring material homogeneity.
Bleaching Towers: Bleaches cellulose paste using various chemicals.
Fan Pump: Mixes pulp with water for the paper-making machine.
Head Box: Forms the paper sheet by intercrossing fibers.
Pulper: Dissolves pulp or recycled paper in water, separating fibers.

Applications and Industries: The document lists various industries where these seals are applicable, including maritime, water treatment, food and beverages, chemical, recycling, oil and gas, and energy sectors.

Materials and Design: The seals are made from materials like aramid fibers and PTFE, designed to withstand high temperatures and abrasive conditions, particularly in areas like the digester.

Catalog excerpts

Paper Industry

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Fabrication process 3. RECOVERY OF CHEMICALS This process, also known as kraft pulping, gives rise to a subproduct, black liquor, which contains the used chemicals and dissolved lignin. Converts wood into tiny pieces called “chips”. The digester eliminates lignin. White liquor (NaOH + Na2S) is used for this purpose, at temperatures of between 165-170 °C and a pressure of 7 Kg/cm2. The end result is pulp and traces of lignin dissolved in water. Black liquor is concentrated by evaporation and burned in a recovery boiler to generate high pressure steam. Its function is to separate impurities from...

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Mechanical seals with special designs, for working with pastes and in chemically aggressive conditions. Variable requirements, depending on the machinery used: high pressures and speeds, high temperatures and vibrations. Fabrication process In paper manufacturing, the cellulose fibres are mixed with water, giving rise to dense mixtures and products that often require a seal with a design that favours the lubrication of the contact surfaces, or facilitates special assemblies (API 52, 54). 3. RECOVERY OF 2. DIGESTER 1. GRINDER MECHANICAL SEALS This process, also kno black liquor, which con Converts...

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Lidering S.A.R.L. France Tel. 04 72 67 02 67 Lidering GmbH Deutschland Tel. 0211 522 890 94 S.A. Lidering N.V. Belgique-Belgie Tel. +34 93 480 44 22 Lidering Mechanical Seals, S.A. Panama Tel. 397-1572 www.lidering.com email: [email protected] iEPI INDUSTRIES family of companies Maritime Industry Water Treatment Industry Food and Beverages Industry Chemical Industry Recycling of waste Industry A Recycling of waste Industry

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Paper Industry

Paper Industry

Catalog excerpts

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