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Off-machine coater splicing is affected by several parameters

Splicing efficiency on coaters averages about 98%. Variables that affect the splicing process include primary roll speed match, paster roll speed match, paster roll gap, paster roll pressure, paper caliper/hardness profiles, splice tape pattern and tail length.

Understanding coater blade angle vs. loading tube pressure

For a given blade tip bevel, when load tube pressure is increased, the blade angle will decrease, resulting in the blade running on its heel for a while. This, along with the additional bending pressure at the blade tip, will reduce coat weight. It is important to understand the interaction between blade angle, blade tip angle and loading tube pressure.

SymSizer size press uneven nip loading solved, a case study

This case study is for a size press which had intermittent problems with sheet breaks when the rolls were nipped up. The problem did not occur every time, so it was difficult to troubleshoot.

Indah Kiat Perawang 50% time savings in doctoring, case study

When IKPP Perawang wanted to boost machine runnability and performance, they challenged Valmet's specialists to find potential areas for improvement.

Common fluids valves explained: Pressure reducing valve

Pressure reducing valves are used to create and hold a pressure setpoint in a downstream hydraulic branch. Valmet uses sandwich style valves because they are easy to fit in a stacked hydraulic valve block circuit.

Measuring applied and residual coat weight on applicator rolls

Starch and coating is applied to the applicator roll using a rotating rod. The amount of coating applied to the roll is the most important variable for good coat weight control. This article describes a method of measuring the wet film on the fly across the size press, using a simple measurement tool.

Vibration monitoring and analysis in tri-nip press, case study

A paper machine experienced vibration in its tri-nip press on the tending side only. Valmet condition monitoring and vibration analysis used synchronous time averaging (STA) to assist in solving the problem.

A solution for jumbo roll bouncing in the secondary arms

A mill reported that their jumbo rolls were bouncing. This started after their reel's flattened secondary arm rollers were replaced with fresh, round rollers...

Innovation is embedded in our DNA

It is our DNA to design and manufacture high-quality products that respond to customer demands and requirements. In the past decades, our company’s technology has evolved along with the trends that have shaped the manufacturing sector in general.

Availability service guarantees the delivery of valves to Terrafame mine in six hours

Availability service is a service format developed by Neles to guarantee that the client receives the necessary components within the required timeframe. Based on its agreement, Terrafame’s multi-mineral mine in Sotkamo gets new valves delivered within six hours.