separators for use in removing undissolved water and solid contaminants from petroleum fuels.

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MIL-PRF-52666F

2.4 Order of precedence. In the event of a conflict between the text of this document and the

references cited herein, the text of this document takes precedence. Nothing in this document,

however, supersedes applicable laws and regulations unless a specific exemption has been

obtained.

3 REQUIREMENTS

3.1 First article. When specified (see 6.2), complete F/S unit(s) shall be subjected to first

article inspection in accordance with 4.2.

3.2 Materials. The manufacturer shall select materials for F/S capable of meeting all the

operational and environmental requirements specified herein. All metal parts in contact with the

fuel shall be free of zinc, cadmium, copper and their alloys. The use of lightweight materials,

such as composites, should be considered. Materials used shall be compatible with petroleum

fuels containing water and inhibitors as specified in MIL-PRF-52308 with no evidence of

deleterious effect. The materials specified herein are recommended, but are not mandatory.

Recycled, recovered or environmentally preferable materials shall be used to the maximum

extent possible (see 6.7). The F/S should have a minimum useful life of 15 years.

3.2.1 Material deterioration, prevention and control. The F/S shall be fabricated from

compatible materials, inherently corrosion resistant or treated to provide corrosion and

deterioration protection for the F/S's expected service life in any operating and storage

environment.

3.2.2 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with each

other unless protected against galvanic corrosion.

3.2.3 Identification of materials and finishes. The contractor shall identify the specific

material, material finish or treatment for use with component and subcomponent and shall make

information available upon request to the contracting officer or designated representative.

3.3 Operational requirements. The F/S shall be lightweight, portable, durable and capable of

being assembled/disassembled in 30 minutes or less to replace expendable components.

3.3.1 Military fuels and additives. The F/S specified herein shall satisfactorily process all

aviation, diesel and motor fuels, for ground and shipboard use, containing the maximum

allowable concentrations of all required and allowed fuel additives at the prescribed flow rates.

3.3.2 Water removal. The F/S shall remove water at the maximum water injection rate of

5 percent (%) at 115 % of rated flow. The effluent fuel samples shall contain not greater than

5 parts per million (ppm) by volume of undissolved water when measured with a type II or type

III Aqua-Glo water detector, in accordance with ASTM D 3240. (Results to the nearest whole

number as ppm of undissolved water in fuel.)