SAE ARP4946
SAE ARP4946 2000-OCT-01 Aerospace - Valves Check Hydraulc Arcraft and Mssle
This SAE Aerospace Recommended Practice (ARP) establishes the general requirements for spring-loaded, normally closed check valves for use in Type I, Type II, or Type III aircraft and missile hydraulic systems having nominal operating pressure shown in Table 1.
Purpose:
The purpose of this document is to provide, in one document, the general requirements for design, construction, acceptance, and qualification test requirements for hydraulic system check valves (see Table 2).
Classification:
The check valves shall be of the classes based on the applicable operating pressures (see Table 1).
Field of Application:
This document applies to hydraulic system check valves which are installed into components, manifolds, or tube lines or are of a cartridge type valve design.
Standard Parts:
Check valves shall be furnished in the sizes specified on the applicable specification sheet. Standard parts shall be used wherever they are suitable for the purpose and shall be identified on the drawing by their part numbers. In the event there is no suitable corresponding standard part in effect, nonstandard/commercial parts may be used provided they conform to all requirements of this specification.
Specification Sheets:
The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between the requirements of this recommended practice and the specification sheet, the latter shall govern.