Page 20 - Apollo - Industrial Applications Guide

DEFINITION:

Merriam - Webster’s Dictionary defines
CAUSTIC as:
1) capable of destroying or eating away by chemical action : corrosive
The name caustic comes from the Latin word causticus, from Greek kaustikos, from kaiein to burn. First known use dates
back to the 14th century.

CHARACTERISTICS:

TYPES:
Caustics are corrosive in nature can damage another surface or substance
through contact. In the case of humans most frequent contact winds up being Sodium Hydroxide
to the skin or eyes. Irritation and ulcerated burns can occur. The greater concern (Lye or Caustic Soda)
is exposure through Inhalation or ingestion. Inhalation can cause damage to Potassium Hydroxide
the repertory system. Ingestion can cause damage to the gastrointestinal tract. (KOH or Caustic Potash)
Calcium Hydroxide

GENERAL NOTE: It conceivable that some corrosive applications would include Fugitive
Emissions requirements. It is important to look at the compatibility of all the valves
components not just the body material. You should take into account all items that come MARKETS:
in contact with the media such as ball, stem, bearings, springs, seats, stem packing, body
seals and even fillers used in the seals. In the case of caustics be aware that the use of glass Etching Glass
filled PTFE, which is normally impervious to most chemical attack, is a concern. Caustics Process Engraving
can destroy the glass fillers leaving you with leaking seals. It is just as important to look
at the external components of valves as the internal components. The atmosphere can Surfactants
sometimes be as aggressive, or more even so than the internal process. Another word of Bleaching
caution, concentration of the media and temperature changes can make a huge difference Pharmaceuticals
in how aggressive chemical attack can be. Once you reach a certain point, even a ten degree Chemical Synthesis
temperature increase can mean the difference between acceptable or not.
Rayon
Film Manufacturing
Pulp & Paper
Rubber reclamation
Drain Cleaners
Textile Processing

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