Humidification is required in the production of Printed Circuit Boards (PCBs) to eliminate the build-up of static. Uncontrolled static electrical discharge can damage PCBs rendering them useless. This damage is only detected at the end of the production line and if left unchecked can significantly lower production yields.

The flow soldering machines used in the production of PCBs produce a lot of heat. As the air heats in the manufacturing area it becomes drier and is therefore more prone to static electrification.

By maintaining a humidity of around 55% relative humidity (%rH) ±3%rH, this electrical charge is dissipated eliminating the risk of accidental discharge on to the PCBs.

Cold water humidifiers such as the JetSpray and the HumEvap MC3 can provide up to 12°C adiabatic cooling as well as maintain humidity levels. This can assist in acheiving an ideal manufacturing temperature of 20°C and reduce the demand on cooling equipment and chiller running costs.

Humidifiers can add moisture to air handling units feeding air to the process environment or for facilities without central air conditioning plant, humidifiers can add moisture directly to the atmosphere.

As this type of manufacturing requires a clean environment, when spray humidifiers are used then they should be supplied with pure reverse osmosis water. The PureFlo RO water filter is an ideal filter to produce RO water for this type of application as it has a high efficiency (<90%) and can supply up to 300 l/hr of RO water and requires no additional tanks or pumps.

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