MIL-DTL-5523E
3.6 Interchangeability. All parts having the same manufacturer's PIN shall be directly and completely
interchangeable with each other with respects to installation and performance. Subassemblies composed of selected
mating components must be interchangeable as assembled units, and shall be so indicated on the manufacturer's
drawings. The individual components of such assembled units need not be interchangeable.
3.6.1 Special tools. The design shall be such that special or unusual tools will not be required for normal
maintenance and inspection of the valve.
3.7 Weight. W eight shall be maintained as low as possible, consistent with the requirements of this specification.
The weight of the assembled valve shall be specified in the manufacturer's assembly drawings.
3.8 Finish.
3.8.1 Surface roughness. Surface roughness finish, as required, shall be established, and shall be specified on the
manufacturer's drawing in accordance with ASME B46.1. Determination of surface finishes shall be made with stylus
type instruments as specified in ASME B46.1. If surface defects are unacceptable, it shall be specifically designated
that all imperfections will be within stated limits or that prescribed special inspection procedures will be followed. At
least where a surface of 16 micro-inch roughness height or finer is designated, the essential process description for
its generation shall be in addition to surface measurements that constitute part of the requirement for compliance.
When necessary, waviness and lay shall be specified.
3.8.2 Coating. Upon request of the procuring activity, the contractor shall provide test data or perform specific tests
which are considered necessary to determine that the material and plated coatings employed in the component are
suitable for the intended service.
3.9 Lubricants. It is desired that only hydraulic fluid conforming to MIL-PRF-5606, MIL-PRF-83282 or
MIL-PRF-87257 be used to lubricate seals during installation and assembly of hydraulic components. A light coating
of hydraulic fluid conforming to MIL-PRF-6083 will be permitted. If other lubrication is necessary, the means of
lubrication and the lubricant used must be approved by the procuring activity. Lubrication shall be so accomplished
that no disassembly for relubrication is necessary during endurance testing or normal service life. Copious use of
petrolatum shall be avoided.
3.10 Physical defects inspection. All magnetizable highly stressed parts shall be subjected to magnetic inspection in
accordance with ASTM E1444. Non-magnetizable highly stressed parts shall be inspected by a suitable process for
detecting physical defects. Where such inspection is necessary, it shall be specified on the manufacturer's drawings.
3.11 Identification of product.
3.11.1 Name plate. Each valve shall be identified by means of a durable identification plate, clearly and permanently
marked with the following information, and shall be attached in accordance with MIL-STD-130.
Valve, Relief, Hydraulic Pressure (Relief pressure range)
Type I
Specification MIL-DTL-5523
MS or AN PIN
Stock No.
Manufacturer's PIN
Manufacturer's Serial No.
Contract or Order No.
Manufacturer's Name or Trade mark or Code
3.12 Hydraulic pressure setting. All hydraulic pressure relief valves which are furnished under contract, other than
direct Government procured and indirect shipment such as spares, shall be set by means of a power-driven pump to
deliver rated flow at the differential pressure required by the specific contract (+25, -0 psi for Class YZ, +50, -0 psi for
Class AB, and +100, -0 psi for Class CD), with a return port back pressure of 200+25 psi for Class AB and CD valves
only. This pressure setting shall be impressed on a led seal, or equivalent, attached to the lockwire of the unit. As
the pressure adjustment is altered, this seal shall be destroyed and replaced with a new seal properly stamped with
the new pressure setting and attached to the lockwire. When emergency circumstances dictate, the valve may be set
with a hand pump to first flow at the minimum rate of 1.5 cc (30 drops) per minute, at the pressure of 95 percent of
the specified setting value. This is the emergency setting pressure.
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business