Aqua Lung MISTRAL SECOND STAGE Посібник з технічного обслуговування - Сторінка 14

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Aqua Lung and Apeks Regulators and Nitrox

When it comes to issues of nitrox safety and compatibility, the concerns lie primarily with the regulator's ﬁ rst stage as it is subjected

to high inlet pressures. High inlet pressures lead to adiabatic compression or heating of the gas. The Aqua Lung or Apeks regulator

product described in this manual, when properly cleaned and assembled, is authorized for use with enriched air nitrox (EAN) that does

not exceed 40% (EAN 40). It is authorized because it has undergone adiabatic compression testing and the authorized service kit

components and lubricants are compatible in elevated oxygen environments. During cleaning, a mild detergent must be used to remove

condensed hydrocarbons (compressor oils) from the inside passageways of the ﬁ rst stage. For the ﬁ rst stage to remain EAN40 compat-

ible, only use hyperﬁ ltered compressed gas ( hydrocarbons < 0.1 mg/m3). Ordinary compressed breathing air (Grade E) usually does

not meet this criterion. Once ordinary breathing air is used, the ﬁ rst stage is no longer EAN40 compatible until it is cleaned and serviced

again.

Although regulator second stage components are not exposed to high pressure EAN, Aqua Lung and Apeks recommend that the same

cleaning procedures be followed for the complete regulator. This prevents the possibility of cross contamination and guarantees the

cleanliness of the entire regulator.

Cleaning Brass and Stainless Steel Parts

1. Preclean in warm, soapy water* using a nylon bristle tooth brush.

2. Thoroughly clean parts in an ultrasonic cleaner ﬁ lled with soapy water. If there are stubborn deposits, household white distilled

vinegar (acetic acid) in an ultrasonic cleaner will work well. DO NOT place plastic, rubber, silicone or anodized aluminum parts

in vinegar.

3. Remove parts from the ultrasonic cleaner and rinse with fresh water. If tap water is extremely "hard," place the parts in a bath

of distilled water to prevent any mineral residue. Agitate lightly, and allow to soak for 5-10 minutes. Remove and blow dry with

low pressure (25 psi) ﬁ ltered air, and inspect closely to ensure proper cleaning and like-new condition.

Cleaning Anodized Aluminum, Plastic & Rubber Parts

Anodized aluminum parts and parts made of plastic or rubber, such as box bottoms, box tops, dust caps, etc., may be soaked and

cleaned in a solution of warm water mixed with mild dish soap. Use only a soft nylon toothbrush to scrub away any deposits. Rinse in

fresh water and thoroughly blow dry, using low pressure ﬁ ltered air.

CAUTION:

Do not place plastic and rubber parts

in contact with acid solutions. This could alter

their physical properties and cause degradation

and premature breakdown.

Cleaning MP Hoses

1. Hose ﬁ ttings: Ultrasonically clean with soapy water; vinegar OK on tough corrosion

2. Run soapy water through hose if needed

3. Thoroughly rinse with fresh water

4. Blow out hose before installing

Cleaning Corrugated Hoses

Clean using a mixture of liquid dishwashing detergent and hot water. Use a 2 ¾" diameter bottle-brush with nylon bristles to clean

the inside of the hoses. Rinse in fresh water and hang to air dry completely.

Lubrication and Dressing

Wear powderless, latex gloves when handling and lubricating o-rings. Keeping internal parts free from skin oils and other contaminates

is important when running enriched air nitrox through a ﬁ rst stage. All o-rings should be lubricated with Christo-Lube

the o-rings with a very light ﬁ lm of grease, and remove any visible excess by running the o-ring between thumb and foreﬁ nger. Avoid

applying excessive amounts of Christo-Lube grease, as this will attract particulate matter that may cause damage to the o-ring.

*Soapy water is deﬁ ned as "household" grade liquid dishwashing detergent diluted in warm water.

Procedure A: Cleaning and Lubricating

(All Aqualung Regulators)

MCG-111. Dress