1、IlILITAI(P SPECIFICATION VALVE, NONFERIEDUS, FOR USE VITH HALOGENATED REFRIGERANTS This specification is mandatory for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 1.2 Classification. Scope. This specification covers manually operated valves for use with halogenated
2、 refrigerants. Valves shall be cf the following types and classes, as specified (see 6.1): Type I - Diaphragm, nonback seating, packless. Class 1 - Shut-off service, angle, brazed. Class 2 - Shut-off service, straight, brazed. Class 3 - Shut-off service, angle, brazed to flare. Class 4 - Shut-off se
3、rvice, straight, flare. Class 5 - Shut-off service, straight, three-way flare. Class 6 - Throttling service, angle, brazed. Class 7 - Throttling service, straight, brazed. Class 8 - Charging, drain or purge, service, angle, brazed to flare. Class 9 - Charging, drain or purge, service, straight, braz
4、ed to flare. Class 1 - Shut-off service, angle, brazed. Class 2 - Shut-off service, straight, brazed. Class 1 - Shut-off service, angle, brazed. Class 2 - Shut-off service, straight, brazed. Class 3 - Shut-off service, angle, brazed to flare. Class 4 - Shut-off service, straight, flare. Class 5 - Sh
5、ut-off service, straight, three-way flare. Class 6 - Throttling service, angle, brazed. Class 7 - Throttling service, straight, brazed. Class 8 - Charging, drain or purge, service, angle, brazed tc flare. Class 9 - Charging, drain or purge, service, straight, brazed to flare. Type II - Packed, back
6、seating. Type III - Diaphragm, back seating, packless. 2. APPLICABLE DOCILDNTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal form a part of the specification to the extent specified herein: SPECIFICATIONS FEDHLAL QQ-E613 - QQ-E626 - -QQ-B-7
7、50 - QQ-C-502 - QQ-N-281 - 424-763 - Brass, Leaded a Non-Leaded; Flat Products (Plate, Ear, Sheet, and Strip). Brass, Leaded and Non-Leaded; Rod, Shapss, Forgings, and Flat Products with Finished Bronze, Phosphor; Ear, Plate, Rod, Sheet, Strip, Flat Wire, and Structural and Special Copper Rods and S
8、hapes; and Flat Products with Finished Edges (Flat Wire, Strips, and Nickel-Copper-Alloy Bar, Plate, Rod, Sheet, Strip, Wire, Forgings, and Stmctural and Steel Bars, Wire, Shapes, and Forgings, Corrosion-Resisting. Edges (Ear and Strip). Shaped Sections. Bars). Special Shaped Sections. MILITM MIL-V-
9、3 - Valves, Fittings, and Flanges (Ekcspt for Systems Indicated Herein); Packaging of. MIL-S-901 - Shock Tests, H.I. (High-Impact); Shipboard Machineq, Equipment and &stems, Require- MIL-C-15726 - Copper-Nickel Alloy, Rod, Flat Products (Flat Wire, Strip, Sheet, Bar, and Plate) FSC 4130 ments for. a
10、nd Forgings. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILV-20064E MILITARY (oontfd.) MILI-45208 - Inspeotion System Requirements. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with speoifi
11、c proourement functions should be obtained from the procuring activity or as directed by the oontracting officer . ) herein. shall apply. 2.2 Other publications. The following documents form a part of this specification to the extent specified Unless otherwise indicated, the issue in effect on date
12、of invitation for bids or request for proposai &ERICAN SOCIF2Y FOR TESTING AND MATERIALS (Am) B62-63 - Composition Bronze or Ounce Metal Castings. m-66 - Copper-Silicon Alloy Rod, Bar and Shapes. BI%-66 - Copper and Copper-Alloy Forging Rod, Ear, and Shapes. B145-63 - Leaded Red Brass and Leaded Sem
13、i-Red Brass Sand Castings. D1170-62 - Nonmetdlic Gasket Materials for General Automotive and Aeronautical Purposes. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) Street, Philadelphia, Pa. 19103.)
14、B16.22-63 - Wrought Copper and Bronze Solder-Joint Pressure Fittings. WO. 1-69 - Refrigeration Flare-Type Fittings. (Application for copies should be addressed to the American National Standards Institute, Inc., 1430 Broad- liFIM CLACSIFICATION COXMITPEE way, New York, New York 10018.) Uniform Freig
15、ht Classification Rules. (Application for copies should be addressed to the Uniform Classification Committee, 202 Union Station, (Technical society and technical association specifications and standards are generally available for 516 West Jackson Boulevard, Chicago, Illinois 60606.) reference from
16、libraries. They are also distributed among technical groups and using Federal agencies.) 3. mm=s 3.1 First article samule. Unless otherwise specified (see 6.1) and within the time limit specified in the contract or order and prior to subission of aqv complete units for final acceptance the supplier
17、shall urnish a first article sample for inspection (see 4.2) to detemine conformance with this specification (see 6.3). Approval of the first article aample by the command or agency concerned shall not relieve the supplier of Me obligation to supply equipment conforming %o this specification. first
18、article sample will be acceptable without prior written approval from the contracting officer. materials will be considered in lieu of those specified, but their use will only be permitted after the commend or agency concerned has been satisfied by test or other means that the proposed substitutes f
19、ully meet the eervice requirements cf this specification. No changes or deviations from the 3.2 Material. All material used in the construction of the valves shall be as specified herein. Alternate 3.2.1 Bodies. borneta or caw. 3.2.1.1 For types I and III valves, bodies, bonnets or caps up to and in
20、cluding 5/8 inch shall be con- structed of forged brass In accordance with QQ-5626, composition 21. aast brass. Valves above 5/8 inch may be forged or 3.2.1.2 For type II valves, bodies, bonnets or caps shall be constructed of forged brass or cast bronze Cast valves shall be of braes in accordance w
21、ith ASTM E-145, alloy a. in accordance With QQ-E-426, QQ-J3-750, ASTI4 B-124, alloy 2 or ACTM B-62, as applicable. Bonnets shall be of the flange type or suoh other types as may be determined suitable for Military use. mes I and III valves shall be provided with either a fixed or removable handwheel
22、, as apeoifiedm6.7j, conetructed of corrosion-resistant metal, a die cast alloy with a suitable protective finish or maileable iron with a suitable protective ooating. 3.2.3 Protection aminst corrosion. In order to prevent deterioration due to corrosion, bolts, nuts, studs, pins, screws, and such ot
23、her fastenings or fittings as may be required, shall be of corrosion-resisting steel, copper, brass, bronze, copper-nickel, copper-silicon or nickel-copper alloy in accordance with QQ-s-763 , WC-502, QQ-E-613, QQ-E-750, MIL-C-15726, ASTM E-98, alloy B and QGN-281, respeotively. 3.2.2 Handwheela. 2 P
24、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-20064E 43 W 7777706 0233308 5 ia-v-20064E 3.2.3.1 All internal parts of valves such as seats, disks, stems and springs that come in contact with the refrigerant shall be of a corrosion-resistant ma
25、terial. considered satisfactory as a corrosion-resistant material for internal parts. The treatment of ferrous material by plating is not Valve stems shall be of a materiel . and hardness to prevent galling. 3.3 m. Valves shall be of the sizes shown in tables I through N as specified (see 6.1). Tabl
26、e I - Valve types I and III. Vertical center line of valve to face of side connection 1 Class 1 Classes 3 and 8 Class 6 1.Enimum 1.laximm Minimum 1.am Hhimum 1.laXirmim Valve size 1-5/16 1-5/16 1-1/2 I-1/2 2-1 /2 2-1/8 1 -?/16 1 -7/16 1-15/16 1 -9/32 1-5/16 1 +/I6 1-11/16 1-5/16 1 -?/I 6 1 -1 5/16 1
27、 -7/8 1-5/16 1-5/16 1-5/16 1-5/8 1 -?/8 2-1/8 1 -?/16 1 -7/16 1-15/16 I. 2. Tolerances are -+ 1/32. All dimensions are in inches. Table II - Valve type II. Vertical center line of valve to face of side connection Valve Class 1 size blinimm I Mhimum 7/8 1-1/8 1 -3/8 1-5/8 2-1/8 2-5/8 3-1/8 1-1 3/16 2
28、 2. 2-11/32 2-23/32 3 3-5/8 4-5h 6 4-5/8 NOTES: 1. 2. Tolerances are -+ 1/32. All dimensions are in inches. Table III - Valve types I and III. II End to end dimension I Center line of run End to end to face of branch I dimension (run) I connection Valve Class 2 Class 4 Class 7 Class 9 Class 5 Class
29、5 size Min. Max. Min. Max. Min. 1k. Min. 1.h. Islin. . Max. lin. 1/4 2-5/8 2-25/32 2-5/8 2-25/32 2-5/8 2-25/32 2-5/8 2-25/32 2-5/8 2-25 32 2-5/8 2-25/32 % 3-1/8 3-11/16 3-1/8 S-lL 2-5/8 3-11/16 5/8 3-1/2 4 3-5/8 4 3-3/8 4 7/8 4-3/8 4-13/16 - - 4-7/16 &1/2 -I- - - - _- _ _ 1-1/8 5-3/16 5-15/16 - - 4-
30、3/8 4-15/16 - - - - - -_ _ irm: 1. 2. Tolerances are -+ 1/32. All dimensions are in inches. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILV-20064E Table Ff - Valve type II. I t End to end dimension I Class 2 Valve Minimum I size I 7/8 4-1/4 1-
31、1/8 4-7/8 1 -3/8 5-1/4 1 -5/8 6-1/2 2-1/8 8 -5/a 9-5/8 3-5/8 12-3/4 3-1/8 11 4-1/8 14 NOTES: 1. 2. Tolerances are -+ 1/32. All dimensions are in inches. &3/4 a-1/2 5-3/16 6-7/16 6-3/4 11 12 I4 15 3.4 -. Valves shall be for use with halogenated refrigerants. The valves shall be designed for a Types I
32、I and III valves shall be designed meximum operating pressure of 300 pounds per square inch gage (psig). to withstand high shock and shall have successfully passed the high shock requirements in accordance with -lLS-901. repair or replacement without the necessity of applying heat to the valve or br
33、eaking line connections. brazed joints are used for valve assembly, the brazing shall be done with silver solder or equally satisfactory material. Valves shall be of such a design that the internal working parts may be removed for inspection, Where 3.4.1 Valves shall be provided with rising stem to
34、indicate an open or closed position and shall be arranged to close with a right hand (clockwise) motion of the handwheel or operating wrench when facing the end of the valve stem. Stem disks shall not rotate on the seat during closing or opening. (upper stem) shall not rotate on the diaphragm during
35、 closing or opening. The operating screw (upper stem) and threaded valve bonnet shall be of materials having a sufficient difference in hardness to minimize thread galling. may or may not back seat when the valve is completely open. against the bonnet when the valve is completely open. the body or b
36、ody bushing when the valve is completely open. valve body with a shouldered seal. stem by crimping or other mechanical means such as locking screws or nuts. crimping only, a suitable vent shall be provided between the seat disk and lower stem to discharge any entrapped refrigerant to prevent possibl
37、e dislodgment of the seat disk. The operating screw The operating screw (upper stem) shall back seat on the valve bonnet. The lower stem on type I valves The lower stem on type III valves shall back seat against The lower stem on type II valves shall back seat The lower stem assembly shall be screwe
38、d into the All valve seat disks shall be securely retained and fastened to the lower Where seat disks are retained by 3.4.2 Bodies of valves shall be so fitted that the valve seat may be easily refaced. 3.4.3 Orifice. Valves, except those used for throttling or expansion purposes, shall have an unre
39、stricted flow area at least equivalent to the area of a circle having a diameter equal to the nominal pipe size. tubing and shall be male flare or female solder joints. ANSI B70.1. 3.4.4 Connections. All valve connections shall be designed for outside diameter (od) size refrigeration The male flare
40、connections shall be in accordance with The female solder joint connections shall be in accordance with ANSI B16.22. 3.4.5 Au. straight type valves, except type I, class 5 and class 9, shall have in-line connections. 3.6.6 Preswes. readily open and close and shall not leak across the seat at an oper
41、ating pressure of 300 psig (see 4.5.2 and 4.5.3). Valves shall not show evidence of leakage at 300 psig operating pressure. Valves shall Valves shall withstand 450 psig test pressure applied as indicated (see 4.5.1 ) . 3.5 Marldng. Valves shall have distinctly cast or stamped on the side of the body
42、 or on a plate secured to the top of the handwheel the following information: (a) (b) Trademark or name of mnufacturer. Catalog number, size of valve, specifcation and type number. Type I valves, classes 6 and 7, shall show in addition the letters EXP. thereto shall show a directional arrow with the
43、 word Wpenll. the marking it shall not project outside the handwheel nor jut in such a manner as to be dangerous to handle. Valves shall have distinctly cast or stamped on one side of the hy an arrow indicating direction of flow which will show that the inlet pressure is under the valve seat except
44、for type III valves that are designed to be nondirectional. Valve handwheels or plates attached Where a plate under the handwheel is used for 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1.-v-20064E 3.6 3.6.1 B. Types I and III diaphra-p. packle
45、ss. Valves shall be furnished in the following sizes (outside diameter of tubing) (see tabhs I and III): Inches Classes All All All 1/4 , NOTE: Classes 8 and 9 shall have same size tube for brazed and flare ends. 3.6.2 Stem release. ing of the stem and seat. Provision shall be made to permit opening
46、 of the valve under pressure without stick- 3.6.3 Mounting. 3.6.4 Classes 8 and 9. Mounting flanges or lugs shall be provided on all straight type valves. Classes 8 and 9 valves shall be provided with a seal cap for the male flare end connection. shall be fastened to the valve by a brass chain of su
47、fficient length to permit easy removal of the cap. The seal cap shall be of nonferrous material and shall contain a retained type gasket. The cap 3.7 Type II. packed. back seating. 3.7.1 B. Valves shal be globe valves, class 1, angle and class 2, straight, provided with wing caps and furnished in 7/
48、8, I-1/8, 1-3/8, 1-5/8, 2-1/8, 2-5/8, 3-1/8, 3-5/8 and 4-1/8 inch sizes (see tables II and m. 3.7.2 Packing. Valves shall be of the back seating type to permit repacking under pressure. The valve stem stuffing box and gland shall be designed so the packing may be replaced while the valve is under pr
49、essure. Packing shall be of a plastic type, either moulded rings or continuous strip, containing asbestos fiber and graphite, and shall be suitable for use with halogenated refrigerants. Equally effective material satisfactory to the command or agency concerned will be acceptable. 3.7.3 Gaskets. Retained type gaskets shall be used in all seal caps to prevent loss. Bonnet gaskets shall be made of compressed asbestos fiber m
