MIL-PRF-83990A
3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided that
the materials meet or exceed the operational and maintenance requirements, and promote
economically advantageous life cycle costs.
3.3 Design. The oven shall be an upright, fully insulated, electrically heated, automatically
controlled, completely self-contained design of the type, class, style and size as specified in 6.2 and
shall conform to the requirements of NFPA 86D, Class A. Heavy duty and/or industrial grade
components and materials are required with the objective of ensuring long service life under shop
or laboratory service conditions.
3.3.1 Safety. The oven shall be provided with safety features and devices for the protection of
personnel, equipment and the work being processed. Parts which are hazardous to personnel shall
be guarded. Equipment and components shall be selected and applied which are "fail-safe", when
possible.
3.3.2 Materials. All materials used in the fabrication of the oven and related equipment shall
be of a quality necessary to produce an oven to meet the requirements herein and shall not
deteriorate, corrode, rust, or fail when exposed to conditions likely to occur during service usage.
3.3.3 Lubrication. Provisions shall be made for the lubrication of all moving parts except
sealed bearings, to reduce wear and maintain efficiency. Lubrication points shall be readily
accessible.
3.3.4 Accessibility. All parts subject to wear or breakage and all parts which require periodic
maintenance shall be readily accessible for adjustment and replacement.
3.3.5 Interchangeability. All parts shall be manufactured to standards which permit
replacement without modification of parts or equipment.
3.4 Construction. The oven shall be constructed of parts which are free of harmful defects
and repairs. All surfaces shall be clean and free of harmful or extraneous materials. All edges
shall be either rounded or beveled unless sharpness is required to perform a necessary function.
The structure shall be capable of withstanding, without damage, normal forces encountered during
transportation, delivery, and operation of the oven at its maximum capacity.
3.5 Components, systems, and performance.
3.5.1 Air circulation.
3.5.1.1 Type I. Air shall circulate by gravity/convection in patterns which shall promote even
heat distribution throughout the working chamber.
3.5.1.2 Type II. A forced air circulating system shall provide air movement within the oven to
promote even heat distribution throughout the working chamber and provide means for accurate
temperature control. The temperature variation between any two points within the oven shall be no
greater than 10 degrees F.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business