1、m-la-ti MIL-S-64052 47 7777906 O252775 I $-.- - i + MIL-S-64052 29 April 1988 SPRAY GUN, PAINT, HEAVY DUTY, PRESSURE FEED This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. Scope 1.1 Scope. This specification covers Pressure Feed, Heavy Duty, Pain
2、t Spray Gun assemblies, including the gun, cup, gages, regulator and valves, here after referred to as spray gun. 2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification to the extent specified
3、herein. specified, the issue of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. Unless otherwise SPECIFICATIONS FEDERAL TT-E-489 PPP-B-60 1 PPP-B-621 PPP -B-636 PPP-F-320
4、 PPP-T-76 MILITARY MIL-P-23377 MIL-C-46 168 Enamel, Alkyd, Gloss (For Exterior and Interior Surfaces) Boxes, Wood, Cleated-Plywood Boxes, .Wood, Nailed and Lock-Corner Box, Shipping, Fiberboard Fiberboard: Grade) and Cut Shapes Tape, Packaging Paper (For Carton Sealing) Corrugated and Solid, Sheet S
5、tock (Container Primer Coatings: Coating, Aliphatic Polyurethane, Chemical Agent Epoxy-Polymide Chemical and Solvent Resistant Res i st ant Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Comman
6、der, US Army Armament Research and Development Engineering Center, ATTN: using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. SMCAR-ESTS, Rock Island, IL 61299-7300 by I f- -.+ 1 I FSC 4940 THIS DOCUMENT CONTAINS 7
7、PAGES. APEC N/A - . ._ DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-S-64052 44 W O6 025i776 T MIL-S-64052 MIL-P-52 192 MIL-T-8 1772 STANDARES FEDEM FED-STD-H28 MIL
8、ITARY MIL-STD- 1 O5 MIL-STD- 1 29 MILSTD- 130 MILSTD-889 MIL-STD-1190 - Primer Coating, Epoxy - Thinner, Aircraft Coating - Screw-Thread Standards For Federal3ervices - Sampling Procedures and Tables for Inspection - Marking For Shipment and Storage - Identification Marking of US Military Property -
9、 Dissimilar Metals - Minimum Guidelines For Level C Preservation, by Attributes Packing and Marking (Copies of specifications, standards, handbooks, drawings, and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity o
10、r as directed by the contracting officer.) (Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. may be available in or through libraries or other informational services, ) specification and the references cited
11、 herein (except for associated detail specification specification sheets or Ms standards) , the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. These documents als
12、o 2.2 Order of precedence. In the event of a conflict between the text of this 3.1 First arbicle. When specified in the contract or purchase order, a sanple shall be subjected to first article inspection (see q.2.1 and 5.2.1). 3.2 Design and construction. The spray gun shall be a conplete functional
13、 assembly consisting of the gun, cup, gages, regulator, valves, gaskets, tO11 rings, bushings and seals, The spray gun shall be new and of the manufacturers current commercial design, commercial/industrial production use. operation and designed with an air pressure fluid material atomizing/mixing ai
14、r cap. The spray gun shall be designed for pressure feed, The spray gun shall be designed and constructed to facilitate its complete disassembly and reassembly for cleaning and repair using simple hand tools, without damaging the spray gun and all spray gun components, The spray gun shall contain no
15、 burrs, slivers, or galling of the interior and exterior surfaces of the air and fluid passages before, during, and after each disassembly and reassembly, constructed of materials which are chemically conpatible with the coatings, enamels, lacquers, paints, solvents and thinners encountered during l
16、ife cycle use and cleaning of the spray gun. Materials which are chemically compatible shall be those materials that will not deteriorate or otherwise reduce life cycle operational functions/characteristics. The internal orifice of the fluid nozzle shall be The spray gun shall be designed for heavy
17、duty The spray gun shall be for hand held The spray gun and its components shall be 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-3.4.2 Threaded aluminum interfacing. Threaded aluminum/aluminum alloy parts or components of the spray gun shall not b
18、e screwed, fastened, or affixed to the male/female threaded aluminum parts of components. mating (male/female) threads and fasteners provides for physical bonding of the aluminum alloy materials, which interferes with and prevents, disassembly and reassembly of the spray gun without damage and degra
19、dation. Oxidation and corrosion of MILS-64052 centered to the functional exterior surface of the fluid nozzle within plus/minus 0.001 inch. the functional external surface of the fluid nozzle, shall not deviate more than 0.0015 inch when measured around the annular radial opening (see Figure 4, 3.13
20、.4 and 3.13.5). The spray gun shall include a pop-off pressure safety relief valve (see 3.13.2). The annular radial opening between the center hole of the air cap and 3.3 Interchangeability_. All parts of the spray gun shall be manufactured to definite standards and tolerances. interchangeable witho
21、ut requiring modification of the part or its mating components. All parts subject to possible future replacement shall be assigned a manufacturers part number and shall be identified in the repair parts nanual. parts shall provide the same or better form, fit, function, and performance as the parts
22、provided-or initially instailed in the end item. 3.4 Material. All parts of the spray gun shall be fabricated from new materials. In no event shall such processes as welding, peening, or filling with cold solders or metallic pastes be used for reclaiming any parts of the spray gun. All spray gun par
23、ts, except the gun body, in contact with the sprayable materials (see 3.7.1) shall be fabricated of bronze, brass, or stainless steel. All respective parts of the spray gun shall be All replacement 3.4.1 Dissimilar materials. Contact between dissimilar metals shall be avoided wherever possible on th
24、e spray gun and all accessory and ancillary equipment. such contact cannot be avoided, suitable protection against corrosion shall be applied in accordance with ?IILSTD-889. When 3.5 Threads, The design, manufacture and configuration of threads shall conform to FED-STD-H28 and the applicable detaile
25、d standards referenced therein. 3.6 Gaskets, O-rings, bushings, seals. The spray gun shall include gaskets/O-rings/bushings/or other seals herein referred to as llgasketslf to assure that there are no internal or external air, paint, or mixture leakages. All gaskets, O-rings, seals, and bushings con
26、tained in or provided with the spray gun shall be composed of materials which will not undergo mechanical or chemical degradation after repeated and prolonged exposure to coatings, enamels, lacquers, paints, thinners, and solvents. Non-mechanical seals, such as glues, epoxies and anaerobics shall be
27、 prohibited for use as sealants in the spray gun. 3.7 Performance and product characteristics. The spray gun shall be complete so that the spray gun can be used for any operation specified herein. 3.7.1 Sprayable material. The spray gun shall be capable of spraying liquid materials such as enamels,
28、lacquers, primers, shellacs, varnishes, polyurethanes, stains, paints, and the two part aliphatic polyurethane coatings, conforming to MIL-P-52192, MIL-P-23377, MIL-C-46168, and MIL-T-81772, which have been thinned to a viscosity of 25 to 30 seconds using a Number 4 Ford cup at +77 degrees Fahrenhei
29、t (F) plus/minus 5 degrees F. on metal surfaces, placed at any orientation to the operator, including overhead. The spray gun shall satisfactorily spray the materials 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-S-64052 3.7.2 Sprayable materia
30、l finish. The spray gun shall provide the capability to apply black to charcoal color pigmented acrylic paint over a 3 feet by 3 feet square area with a coating finish equal to or better than the commercial automotive passenger car finish provided by General Motors, Ford, Chrysler, and American Moto
31、rs (see Figure 3). 3.7.3 Spray pattern. The spray guns shall produce a round pattern with the pattern control valve closed, and a symmetrical fan spray pattern with the pattern control valve open (see Figure I. The minimum effective dimensions of the spray pattern shall be that area of the pattern w
32、hich has 100 percent coverage. guns shall not produce any defective patterns as shown in Figure 2, namely a heavy bottom or top pattern, a heavy left or right side pattern, or a heavy center, or split pattern. The spray pattern shall not change in shape when the air cap is rotated. The spray guns, w
33、hen filled with a pigmented alkyd gloss enamel exterior automotive paint conforming to TT-E489 Type I, Class A, black to charcoal in color, having a viscosity of 25 to 30 seconds using a Number 4 Ford cup at +77 -degrees F. plus/minus 5 degrees F., shall produce the symmetrical fan and round spray p
34、attern as specified in Table I without any paint runs within the pattern area, when held stationary and perpendicular to the spraying surface at a distance of 7.5 to 8.5 inches inclusive and operate for not more than one second. In accordance with 3.2, the spray gun shall produce round and symmetric
35、al spray patterns, in accordance with Figure I; then, the spray gun shall be completely disassembled and thoroughly cleaned and all packing, gaskets, and other seals, shall be replaced. The spray gun shall be reassembled and retested for the round and symmetrical spray patterns in accordance with Fi
36、gure 1. The spray TABLE I. Spray Pattern Size Minimum Effective Dimensions of Fan Spray Patterns: Major Axis: 9 inches Minor Axis: 2 inches Minimum Effective Diameter of Round Spray Patterns: 2 inches 3.8 Air consumpti.on and fluid pressure. 3.8.1 Air consumption. TABLE II: Air Consumption and Press
37、ure and Fluid Volume The spray guns shall produce the normal spray patterns specified in Figure 1 and 3.7.3 within the air consumption, liquid flow, and air pressure limits specified in Table II. Air volume: Air Pressure: Fluid Fled: 7-8 cubic feet per minute (CFM)* 55 to 65 pounds per square inch A
38、t least 14.5 ounces per minute 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-S-64052 49 W 9999906 0252779 5 H MIL S-64052 * barometric pressure and +70 degrees F. The volume of air flow shall be corrected to 29.92 inches of mercury standard 3.8
39、.2 Li uid ressure. The spray gun shall produce the spray patterns as specified + see Figure I and 3.7.3) at liquid pressure of not more than 20 pounds-force per square inch gage (psig). 3.9 Impact resistant. The spray gun, with the one quart cup removed and with the nozzle and connections protected
40、shall withstand being dropped six times through a free fall of not less than six feet to a concrete floor without damage or deformation to the spray gun or any of its parts or components sufficient to degrade the performance operation specified herein of the spray gun. 3.10 Operational endurance. wi
41、thout damage or deformation, and perform satisfactorily as specified herein, after 10,000 actuations (full trigger strokes) of the spray gun trigger while under 55 to The spray gun and all components shall withstand 65 psigo 3.10.1 Hydrostatic pressure. The spray gun, with the one quart cup removed,
42、 shall withstand, without damage or deformation, and perform satisfactorily (see 3.7) after a hydrostatic pressure of not less than 250 psig for not less than one (1) minute. After being subjected to this hydrostatic pressure, the spray gun, with the one quart cup removed, shall meet or exceed the a
43、ir leakage requirements (3.12.1 to 3.12.4). 3.11 Use simulation requirement. In accordance with 3.2 and 3.7.3, the spray gun shall complete fifty (50) spraying cycles with a five (5) minute interruption at mid-point in the fifty (50) cycie tesi t simulate actual use conditions, with a pigmented alky
44、d gloss enamel exterior automotove paint conforming to TT-E-489 Type I, Class A. A spraying cycle shall be defined as: a single pull (engagement) of the spray gun trigger which results in the following sequential events: 1) The air valve opening to permit air passage through the spray gun, 2) the li
45、quid material valve opening to permit the passage of air and enamel through the spray gun, 3) the deactivation (disengagement) of the spray gun trigger which shall close the liquid material valve to prevent the passage of liquid material through the spray gun, 4) not less than five (5) seconds nor m
46、ore than ten (10) seconds shall elapse from the time the liquid material valve is opened until the liquid material valve is closed, 5) the liquid material valve shall remain closed (spray gun passing air but not spraying liquid) for not less than fifteen (15) seconds. 3.12 Air leakage requirements.
47、leakage requirements of (see 3.12.1 to 3.12.2). The spray gun shall meet or exceed the .sir 3.12.1 Air leakage requirement No. 1. When the following pre-conditions have been fulfilled (see pre-conditions a., b., and c. below), the spray gun shall not be damaged or deformed after being subjected to a
48、ir pressure of not less than 100 psig for not less than two (2) minutes. When the air pressure source is shut off by a supply line valve to isolate the air pressure captured in the spray gun, the captured air pressure, 100 psig or more, in the isolated spray gun shall not drop more than ten (10) psi
49、g in not less than one (1) minute. Pre-conditions of Air Leakage Requirement No. 1: a. Remove the spray gun cup, the material inlet connection shall be capped, plugged, or blocked to prevent the escape of air through the material inlet connect ion. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-MIL-S-64052 Y4 494740b 0252780 1 MIL-S-64052 b. The spray gun trigger shall not be activated. c. The air and liqu
