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26 Cards in this Set
- Front
- Back
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Decribe the automatic drain separators on a divers air compressor.
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Automatic drain separators
are commonly small and installed between the stages of air compressors. |
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Why are moisture separators needed in diving systems?
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Moisture separators are installed in diving systems to collect and remove as much moisture as possible before the air is delivered to the storage flasks.
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What are the two types of separators used in diving systems?
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The two types of separators
used in diving systems are automatic drain and the manual drain. |
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What is the most common type of H.P. Moisture Separator?
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The most common type of H.P.
Moisture Separator found in diving systems is the MIL-F-22606 |
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Where can you find the MIL-F-22606 moisture Separator?
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The MIL-F-22606 Moisture Separator can be found in the Navy stock system.
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What date is used to establish the recertification test cycle when installing a refurbished moisture separator flask?
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When installing a refurbished flask, the date the unit is actually placed into service
is the date used for establishing the recertification test cycle. |
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True or False?
All diving systems with compressors must have a moisture separator located upstream of the compressor? |
False. All diving systems with compressors must have a system moisture separator located DOWNSTREAM of the compressor.
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Where must the moisture separator be installed for maximum efficiency?
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For maximum efficiency, the separator must be installed in a straight length of pipe at least 10 pipe diameters downstream of the nearest valve or fitting.
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Where are moisture separators located compared to the compressor after-coolers and the system filters?
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The separator should be located downstream of the compressor after-coolers to trap the condensation resulting from the air cooling
process but prior to the first system filter. |
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Why are moisture separators always installed prior to the backpressure regulator?
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They should always be installed prior to the
backpressure regulator to prevent damage to the backpressure regulator from compressor pressure fluctuations. |
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True or False?
Moisture separators are also effective in removing a high percentage of the oil vapor from divers air. |
True. These separators are also effective in removing a high percentage of the oil vapor normally discharged
by oil lubricated compressors. |
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How is moisture removed from manually operated moisture separators?
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All manually operated separators must be provided
with drain valves to remove collected moisture. DUHHH! |
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What is the MIL-F-22606 moisture separators constructed of?
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MIL-F-22606 moisture separators are constructed of HY80 steel.
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Except for the MIL-F-22606 what are the other divers air compressor moisture separators typically made of?
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Other moisture separators vary in their construction materials, but are typically fabricated from stainless steel or bronze.
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When selecting a moisture separator for a divers air compressor what 3 variables determin the separator size?
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The separator capacity (size) is selected based on the compressor output pressure, temperature, and flow.
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What is the Floodable
Volume of a Mil-F-22606 moisture separator? |
0.5 cubic feet
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During compressor
operation, how often is the moisture separator blown down? |
Separators shall be blown down at least once per hour of compressor operation.
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If there are two compressors discharging into one moisture separator, how often is the moisture separator blown down?
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If there are two compressors discharging into one moisture separator then bleed-down shall occur at least once every half-hour while both
compressors are operating. |
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On compressors with interstage separatore that are manually opperated how often must they be blown down?
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Manually drained compressor
separators must be drained at least every 15 minutes during compressor operation. |
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Compressors with automatic
separator blow-down shall be checked... A. periodically B. every :15 C. every :30 to ensure proper operation. |
Compressors equipped with automatic separator blow-down shall be checked...
A. periodically to ensure proper operation. |
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In accordance with PMS how often are the external inspection for the MIL-F-22606? How often are all other moisture separators inspected?
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MIL-F-22606 separators
require annual inspections, all others require 18 month inspections. |
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How often are MIL-F-22606 moisture separators tested
by Ultrasonic (UT) or Acoustic Emission (AE)? |
MIL-F-22606 H.P. moisture
separators shall be tested by Ultrasonic (UT) or Acoustic Emission (AE) testing at least every 7 years. |
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How often are "non" MIL-F-22606 moisture separators tested and by what means?
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Stainless steel and bronze
moisture separators receive an internal and external visual inspection at intervals not to exceed 18 months. |
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What are the cleaning requirements for all moisture separators?
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Moisture separators shall be
cleaned to the same requirements as the system where they are installed. |
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When are moisture separators required to be cleaned?
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Cleaning is required when the separator is initially
installed and anytime cleanliness is lost. |
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How are moisture separators required to be tagged?
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All moisture separators require a tag to be affixed upon completion of the recertification testing.
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