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Paper mill boiler chemical cleaning - why, when and how?

Excess deposits inside recovery boiler tubes may cause failure of the tubes, resulting in injuries to personnel, equipment damage and lost production. This article describes the need for and methodology of performing chemical cleaning of your recovery boilers.

Off machine coater yield loss at the reel, a case study

An OMC suffered from excessive loss at the reel due to offsets, bursts and wrinkles. A new drum with double grooving and tungsten carbide coating solved the problem.

Nondestructive measurement of boiler tube scale deposit thickness

Excessive scale deposit on boiler tubes results in costly energy losses and excessive boiler unavailability. A well planned and executed boiler chemistry control program is essential to prevent tube failure.

Valmet manufactures exact duplicates of your air heater seals

Air heater seals reduce operating costs and improve heat rate. Valmet manufactures a complete range of exact replacement-in-kind seal assemblies.

Care, handling, storage and cleaning of stainless steel headboxes

Under normal conditions, stainless steel is corrosion resistant due to a protective chrome oxide film. However, special care should be taken when storing, handling and cleaning stainless steel, especially in headboxes.

Follow safety rules when handling spools and parent reels

Due to the size and weight of parent rolls and reel spools, handling accidents can cause serious injury or death and costly equipment repairs. However, handling accidents can be avoided if basic safety rules are followed.

Follow these guidelines for periodic maintenance of roll doctors

Always refer to the roll doctor OEM supplier's manual for maintenance information. However, the following are guidelines for periodic maintenance and lubrication for typical roll doctors assemblies.

Review this brief list of calendering terms and definitions

Several terms are in common use to describe calendering equipment, including general operation, temperature control systems and frame design types. This article provides a brief list of terms and definitions.

Airide maintenance - construction, assembly and adjustment

Airides require minimum maintenance, but should still be inspected and adjusted or replaced periodically. The rubber can get hard and brittle and start to leak.

Fabric guiding - basic rules, guidelines and setup procedures

Guiding of all types of fabrics follows similar basic rules, guidelines, and setup procedures. Here are some of the most important ones…