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Copyright ©2001 Liberty Group
Atlas & Yukon Second Stage
Cleaning Procedures
s e c t i o n
4
s e c t i o n
Cleaning Procedures
Acidic Cleaning Procedure
(For Equipment Used With Compressed Air)
Introduction
This procedure provides complete instructions for cleaning reusable,
non-wearing components and parts of regulators and valves used with
standard Grade E compressed air. Acidic Cleaning must also be per-
formed as a prerequisite to performing Aqueous Cleaning — an addi-
tional procedure that is necessary for cleaning component parts of
equipment used with mixtures of oxygen enriched air (EAN/Nitrox)
containing more than 24% oxygen.
Acidic cleaning is a five step procedure that includes:
▼
Degreasing and pre-scrub, plastic parts cleaning
▼
Tap water rinse
▼
Ultrasonic acid bath
▼
Sodium bicarbonate neutralizing bath
▼
Distilled or de-mineralized water rinse
Required Equipment
❏ Ultrasonic Cleaner – Essential to provide the most effective
removal of corrosion and scale from metal parts. It is impossible to
attain the same level of cleaning with any other method. Preferred
features include a built-in timer and a heater.
❏ Screen Dip Basket – Provided with most ultrasonic cleaners,
allows the parts to be fully immersed in each solution, and trans-
ferred from one container to the next.
❏ Separate Containers – It is important to use four separate con-
tainers, including the well of the ultrasonic cleaner, to hold each
solution so that the parts can be transferred quickly in the correct
sequence and with minimal delay. Each container should be ap-
proximately the same shape and size as the well of the ultrasonic
cleaner, so that the dip basket fits completely inside.