Most of pulp&paper plants and crude refineries among others industrial facilities, and also an increasing number of waste water treatment plants, protect their electronics from environmental corrosivity.

During the productive process, some acid and/or corrosive gases are released, such as hydrogen sulphide, SO2, ozone, nitric oxides, etc. These gases come into the electrical rooms through the doors and windows, HVAC systems or others, creating a highly corrosive environment inside and thus affecting electronic instrumentation.

To protect electronics from this environmental corrosivity we must keep them away from corrosive gases. How could we do this? First of all, we have to ensure that all the indoor air has been chemically filtrated with the proper system. Then we have to reach some possitive pressurization inside (20 Pa is the goal).

Alphasorb 8

The chemical adsorbent most appreciated in this case is the impregnated activated alumina, rather caustically or with potassium permanganate. Depending on the gas mixture, should be needed an air filtration system filled with several stages in series of chemical filtration with different medias able to remove every reported contaminant.

In this way Alphachem has a broad range of filtration and presurization units ready to create a corrosive-free environment that will protect your electronic instrumentation from pernicious effects of environmental corrosivity:


  •  Alphachem SFM units. Can supply up to 25,000 m3/h of corrosion-free air. It is used for presurization of control rooms and also for filtration of recirculated air or intake air, when concentrations of corrosive gases are moderate.
  • Alphachem PBS units. Strongly recommended when high corrosive gases concentrations are present. Quite usefull for electrical rooms pressurization in some industries with severe environmental corrosivity, specially in petrochemical & refining.

    Gas filtration unit

    Alphachem SPV-1000

  • Alphachem SPV units. Performe a double task:– Room presurization– Filtration of indoor air.This equipment is widely used in small control rooms, up to 150 m2.


To learn more about these equipments and solutions feel free to contact us.