NPFC - MIL-STD-2193
SHIP HYDRAULIC SYSTEM COMPONENTS
|Publication Date:||9 February 2018|
This standard provides design, construction, and testing requirements that are common to most components used in ship hydraulic (power transmission and control) systems. This standard does not establish configuration requirements, pressure, flow, or performance requirements for any specific component.
The purpose of this standard is to standardize the design, construction, and testing requirements for hydraulic components used in shipboard hydraulic systems, such as valves and actuators. This standard provides the design, construction, and testing requirements for military specifications for ship hydraulic components and the design, construction, and testing requirements in specifications developed by shipbuilders and contractors for the acquisition of ship hydraulic components.
Components to military specifications. When a component is procured to military specification, the tests in this standard apply only to the extent identified in the component military... View More
Components to military specifications. When a component is procured to military specification, the tests in this standard apply only to the extent identified in the component military specification.
Commercial components and components to shipbuilder prepared specifications. Every test need not be applied to each component. The procuring activity has the responsibility for determining if any of the tests may be deleted based on the following guidance:
a. For standard commercial components being used within the applicable design parameters (e.g., pressure, temperature, speed, environment, etc.), the tests for adverse tolerance and extreme temperature functioning are not required.
b. Reliability and maintainability requirements need be included in the component specification only when required by the shipbuilding or other higher level specification.
c. High-impact shock requirements need not be applied if the components are used solely in a system not subject to these requirements.
d. The contamination sensitivity test may be limited to those electro-hydraulic servo valves, electric driven motors, and hydraulic pumps not in accordance with a military or industry specification listed in Acquisition Streamlining and Standardization Information System (ASSIST) Online. However, contaminant sensitivity test procedures do not specify fail/pass criteria. Accordingly, the fail/pass criteria may be specified in the procurement specification. (NAVSEA Hydraulics TWH, SEA 05Z4, should be consulted regarding contamination sensitivity test procedures and fail/pass criteria.)
e. For some tests, guidance on the applicability of the test is identified in the test procedure.
Design and installation guidance for O-ring assembly. SAE-AS4716 and SAE-AS5857 provide design features and installation methods to prevent damage to seals on O-ring assembly.
Seal gland design. For existing Navy hydraulic component designs, continued use of seal gland designs in accordance with MIL-G-5514 is technically acceptable. All new component designs are to conform to the seal gland design requirements specified herein.View Less