1、MIL-V - 5524BtASG) . 4 JUNE 1957 Class Maximum rated hydraulic system pressure - psi 1500 1,500 3000 3,000 Superseding MIL-v-5524A 17 March 1950 (See section 6.) MILITARY SPECIFICATION VALVES, CHECK, HRALIC, AIRCRAFT, TYPE I SYSTEW This specification has been approved by the Department of the Air Fo
2、rce and by the Navy Bureau of Aeronautics. 1. SCOPE 1.1 Scope.- This specification covers the detail requirements for aircraft hydraulic check valves for use in type I systems (-6s to +160F). sizes, as specified (see 6.3): 1.2 Cassificati0n.- Valves shall be of the following classes, styles, and 1.2
3、.1 Classes.- Check valves shall be furnished in the classes specified in table I. TABLE I Pressure ratings TABLE II Drawings for check valves 1 Stile I CF I CYla I AN 207 AN 2 9 - MS288W - AN6280 f . THIS DOCUMENT CONTAINS / Hydraulic, Aircraft, Petroleum Base MIL-0-6083 Oil; Preservative, Hydraulic
4、 Equipmnt MJLJi-8 7 75 Hydraulic System Components, Aircraft, General Specification for S28890 Valve, Hydraulic Check, 3,000 PSI. Flareless, Type I Systems D-GS Air Farce-Navy Aeronautical Standard Drawings AN6207 AN6249 AN6280 Valve - 1500 PSI Hydraulic Check Valve - 3000 PSI Hydraulic Check Valve
5、- 3000 PSI Hyraulic Check Internal Ports (Copies of specifications and standards required by contractors in connection dth specific procurement functions should be obtained frm the procuring activity or as directed by the contracting officer.) 3. REQUUIREMENTS 3.1 Qualification.- “he hydraulic check
6、 valves furnished under this specification shall. be a product which has been tested and has passed the Qualification tests specified herein. 3.2 General.- “he requiremnts of Specification MIL-H-8775 apply as requirements of this specification with the exceptions and additions specified herein. 3.2.
7、1 in the event the requiranents of the general specification and this speci- fication conflict, the requirements of this specification shall govern. offers fhe least resistance to flow and the minimum possible weight consistent with the requirements of this specification. fied in the applicable AN d
8、rawings and MS standards specified in table II. 3.3 Design and construction.- The design of the check valves shall be one that 3.3.1 The configuration, dimensions,and other details of design shall be as speci- 4. QUALITY ASSURANCE PROVISIONS 4.1 . Classification of tests.- valves shall be classified
9、 as follows: The inspection and testing of the hydraulic check a) Quaification tests (see 4.3) b) Acceptance tests (see 4.4) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.2 4.3. General.- The quaity assurance provisions shall be in accordance w
10、ith Speci- fication MIL-ii-tl775 and as specified herein. this specification, as described under h.7, “Test methods,n and in the der listed in tables III and IV. Qualification tests.- Qualificat5on tests shall consist of ail the tests of TABIE III Manufacturers Qualification tests Required on sample
11、 No. 1 (e) o“ Quaification test -4- UA te it shall then be allowed to check before the static head of fluid decreases to 1 psi. the cessation of fluid flow shall be the checking time and shall not exceed l-lE seconds. Checking time.- The valve shall be held in the vertical position defined The time
12、between the release of the PO pet and The valve poppet shall be mechanically actuated to its full open position 6 - I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. Hydraulic line dimensions valve size -4 -5 -6 -8 -10 -12 -i5 Tube OD (in.) Tube le
13、ngth (in.) l4 l5 l.642 1342 i/4 5/16 19-1/2 23 21 1 4.6.3.2 Crackingp ressure.- ire raualy increasing pressure shall be applied at the valve inlet in the free-flw d otion beginning with zero. Cracking pressure shall be observed and ahall be nut less than 2 psi nor greater than 8 psi. Cracking pressu
14、re is defined as the pressure at which the poppet is unseated allawing flaw equal to or exceed- ing 2 cc per minute through the valve in the free-flow direction. 4.6.4 Press.pre rq.- Fressure drop through the valve shall be measured at a flaw equal to the rated flou capacity. manometer connected acr
15、oss the check valve may be used for accurate measurement of the pressure drop. drop through the valve 0,000 cycles of operation at During the first 45,000 cycles 7 the rate of 30 to 100 cycles per minute. Each cycle shall consist of flow through the valve at the rated flou capacity for the she, foll
16、owed by a reversal of the direction of the flow and aFplication af the maximum rated pressure. of this test, the peds pressure, which occurs during the pressure application portion of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L MIL-V-5524B Lb 7
17、797706 OLB473Li L I each cycle, shall be 125 *5 percent of the maximum rated pressure. A typical test setup for endurance cycling is indicated in figure 2. Leakage, as specified in 4.6.2.2, shall be checked upon completion of 22,500 cycles, and the requirements.of that test shall be satisfied. Upon
18、conpietion of 50,000, leakage and operation, as specif$ed in 4.6.2.1 and 4.6.3, mspectively, shall be checked, and the requireyents of those tests shall be satisfied. 4.6.6 High- and lar-temperature functioning.- 4.6.6.1 feet of hydraulic oil in the reverse-flow direction. at a temperature not warme
19、r than -6SF for 72 hours if the valve contains nonmetallic parts other than datic seals. this period may be reduced to 24 hours. After this period, the valve poppet shall be actuatedmechanically at least 2 times. Leakage, as specified herein for Acceptance tests, and operation shall be checked at th
20、e end of the test, and the requirements of those tests (4.6.2.2 and 4.6.3, respectively) shall be satisfied. of 160F. While the temperature is being raised, sufficient mechanical actuations shall be made to determine satisfactory operation throughout the temperature Mge. tests shall be made without
21、waiting for the temperature of the whole unit ta stabilize. Lar temperature.- The valve shall be connected to a static head of 1 to 3 If ail parts of the valve except for static seals are metallic, This arrangament shall be maintained 4.6.6.2 Intermediate.- The test arrangement shall be warmed rapid
22、ly to a temperature These check 4.6.6.3 High temperature.- The temperatures shall be maintained at 160F for a length of time sufficient to allai all parts of the check valve to attain this temperature. With a head of 1 to 3 feet of hydraulic oil on the valve, in the reverse-flow direction, the poppe
23、t shall be actuated mechanically at least Leakage, as specified herein for Acceptance tests, and operation shall be checked at the end of the test, and the requirements of those tests (4.6.2.2 and 4.6.3, respectively) shall be satisfied. 2 tines. 4.6.7 Proof pressure.- The proof pressure specified i
24、n table I: BU be applied to the outlet port, wi%h the inlet port Open, at least 2 successive times and held 2 min- utes for each pressure application. The poppet shall be unseated between applications of the test pressures. There shall be no evidence of leakage, failure, or pemnanent set. Proof pres
25、sure Class I Minimum proof pressure (psi) 1500 I 2.250 4.6.8 Burst pressure.- Pressure shall be applied to the inlet port, with the output The valve shall withstand this burst pressure for a period During port plugged, at a maxjmum rate of 25,000 psi per minute until the burst pressures speci- fied
26、in table XI are obtained. of 2 minutes, the QualFfication test, the pressure may be increased above that apecified in order to secure data on actual burst pressures. The valve shall not rupture under this pressure or leak externally. TABLFIXI Burst pressure I Provided by IHSNot for ResaleNo reproduc
27、tion or networking permitted without license from IHS-,-,-1 I MIL-V-5524B 1b m 7777706 0184735 3 m K . MIL-V- 8 8 5 a fi w E 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-55246 Lb m 7777706 0384736 5 m 5. PREPARATION FOR DELIVERP 5.1 Genera
28、l.- The preparation far eliver-y requirements shaU be in accordance with Specification MIL-H-8775. 6. NOTES 6.1 General.- In addition to the Hotes specified herein, the Notes of Specification MIL-H-8775 -applicable to this specification. 6.2 intended use.- The check valves covered by this specificat
29、ion are intended for The fruiction af the check valves is to allow free flow in use iIi aircraft hydraulic systems conforming to Bpecification MIL-H-O, at operating pressures that do not exceed the values specified herein, with hydraulic fluid conforming to Specification MIL-0-5606. one direction on
30、ly, and prevent flou in the opposite direction. - Valves covered by this specification uere formerly procured which speclfication was later renmberad Cover Sheet MIL-V-5524. 6.b It is understood that check valves suppli.ed under contract will be identical in every respect to the sample tested and fo
31、und satisfactory, and to the detail drawings thereof, except for changes previously approved by the overnment. Any unapproved changes frmthe qualjfcatian sample or fromthe drawings will constitute a cause for rejection. awards will bemade only for such products as have, prior to the bid opening date
32、, been tested and approved for inclusion in the applicable Qualified Products List whether or not such products have actuallybeen so listed by that date. are urged to arrange to have the products that they propose to offer to the Federal Government, tested for qualification in order that they may be
33、 eligible to be warded contracts or orders for the products covered by this specification. ation pertaining to qualification of products covered by this specification should be addressed to the Connuander, Wright Air Development Center, Wright-Patterson Air Force Base, Ohio, the activity responsible
34、 for qualification, with a copy to the Bureau of Aeronautics, Navy Department, Washington 25, D. C. 6.5 Provisions for qualification.- With respect to products requiring qualification, 6.5.1 The attention of suppliers is called to this requirement, aid manufacturers Requests for inform- NOTICE: When
35、 Government drawings, specifications, or other data are used for any purpose other than in connection with a definitely related Goverment procurement operation, the United States Govern- ment thereby incurs no responsibility nar any obligation uhatsoever3 and the fact that the Qoverrnnent may have f
36、ormulated, furnished, or in any way suppied the said drawings, specifications, or other &ta is not to be regarded by implication or otherwise as in any manner licensing the holder or any rlher person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be reJated thereto. Custodians: Navy - Bureau of Aeronautics Air Force . 10 Preparing Activity: Air Force Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
