DLA A-A-55748-1995 SPRAYERS INSECTICIDE MANUALLY-CARRIED HAND-OPERATED-COMPRESSION《手动压缩人工搬运杀虫剂用喷雾器》.pdf

1、A - A-55 7 4 8 W 9999974 OLbb9L 251 W I INCH-POUND I March 27, 1995 A-A-55748 COMMERCIAL ITEM DESCRIPTION SPRAYERS , INSECTICIDE, MANUALLY -CARRI ED : HAND-OPERATED- COMPR ESS ION The General Services Administration has authorized the use of this commercial item description as a replacement for Mili

2、tary Specification MIL-S-14102, which is cancelled. 1. SCOPE. This commercial item description covers manually carried, hand- operated-compression insecticide sprayers. manual spraying of insecticides and fungicides. The sprayers are intended for 2. CLASSIFICATION. The sprayers shall conform to the

3、following sizes. Operating capacity is defined as maximum liquid fill of the tank when first used - 3/4 liquid fill and 1/4 air capacity with all accessories in place: Size 1 - 1 gallon operating capacity. Size 2 - 2 gallon operating capacity. 3. SALIENT CHARACTERISTICS. 3.1 DescriDtion. equipped wi

4、th a hand-operated air pump for pressurization, hose, cut-off valve, lance, nozzle and other accessories as specified herein. The sprayers shall be of the cylindrical type and Benefic ia1 comments, recommendat ions , add it ions , de let ions, clarifications, etc., and any other data which may impro

5、ve this document should be sent to: Defense Construction Supply Center, P.O. Box 3990, ATTN: Columbus, Ohio 43216-5000. DCSC-VSS, AMSC N/A FSC 3740 O I STR I BUT I ON STA TEMENT A. un1 imi ted. Approved for public release; distribution is Licensed by Information Handling ServicesProvided by IHSNot f

6、or ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55748 9999974 OLbbSL8 198 A-A- 55748 3.2 Materials. The entire tank, including the removable filler-hole cover, shall be made of stainless steel conforming to ASTM A 167, UNS S30200 or S30400 or made of forged brass. T

7、he springs shall be made of stainless steel conforming to ASTM A 313, UNS S30200 or better. All other parts that normally come in contact with the insecticide shall be of the same type of stainless steel specified above, or of brass, bronze, or copper alloy. Joining materials or welds and heat-affec

8、ted zones shall be corrosion resistant. All tubing shall be stress corrosion resistant. 3.3 Dimensions. The maximum height of the tank from the bottom of the base to the uppermost point of the top shall not exceed 11 inches (27.9 cm) for size 1 and 22 inches (55.9 cm) for size 2. The height from the

9、 base of the sprayer to the handle in its lowest position shall not exceed 6 additional inches (15.2 cm) above the height of the tank. The diameter of the tank shall not exceed 9 inches (22.9 cm). 3.4 Neiaht. shall not exceed 8 pounds (3.6 kg) for size 1 and 10 pounds (4.5 kg) for size 2. The weight

10、 of the sprayer, when empty but equipped for operation, 3.5 Jank markings . with horizontally embossed lines to indicate the fill charges. shall appear at 0.5 gallon (2L) intervals. The maximum fill charge shall be at 3/4 of the total tank capacity. manufacture. The tank shall be marked in a legible

11、 and permanent manner The fill marks Other markings shall indicate the year of 3.6 Tank fittinss. 3.6.1 Fastenincis for lance. The tank shall be fitted with a pair of fastenings to secure the nozzle and lance and when specified (see 7.2.3), extra fastenings for an extension lance. to the extent that

12、 they may be bent back to their original shape and remain functional. Fastenings shall withstand dropping No set screws shall be used for fastenings. 3.6.2 Filler hole. The filler hole shall be not less than 3.7 inches nominal (94 mm) in diameter, if circular, or in minor axis, if oval. It shall hav

13、e no sharp edges. tank with a chain capable of withstanding a breaking strain of not less than 110 pounds (50 kg). The filler hole cover shall be attached to the 3.6.3 iveted fittings. Rivets used for securing lance brackets or other external fittings shall not penetrate the pressurized portion of t

14、he tank. 3.6.4 Press Ure-relief (safetv) val ve. The tank shall be equipped with a fixed pressure-relief valve for whenever an air-inlet valve is used to prevent pressurization in the tank beyond the limits prescribed for safety or operational purposes. Threaded fittings subject to pressure shall be

15、 c hanne 1 ed . 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. A-A-55748 3.6.5 Plus for pressure gauae oDeninq. opening into which a pressure gauge can fit to provide an air-tight and liquid-tight closure, should the gauge not be required (see n

16、otes). A plug shall be provided for the 3.7 Pump. 3.7.1 Construction. welded construction if made of stainless steel or brass. The pump cylinder shall be a separate part, independently detachable from the tank, tank top, or any other component of the sprayer. be cone-shaped to facilitate reassembly

17、of the plunger cup. The pump cylinder shall be of seamless or electrically The upper part of the cylinder shall 3.7.2 Check valve. polysulfide (i .e., Thiokol) or fluorocarbon (i .e. , Viton), shore hardness 67-73, or equal, and shall be air-tight and liquid-tight. It shall be so designed as to prev

18、ent any leaking of liquid into the pump cylinder over a period of 15 minutes when the tank is pressurized between 65-70 psi (447.8 - 482.2 Kpa) and the check valve is fully submerged. The pump check valve shall be of synthetic rubber such as 3.7.3 Plunuer shaft. a solid rod or a tube. The plunger sh

19、aft shall be of steel and may be either 3.7.4 Plunaer cug. lhe plunger cup shall be not less than 0.06 inch (1.5 mm) thick and the cup skirt shall be not less than 0.5 inch (13 mm) in length. It shall be fungus resistant. 3.7.5 Plunaer cup assembly. The plunger cup assembly shall be so constructed t

20、hat whenever positive downward pressure is applied to the plunger rod when in the raised position, the plunger cup skirt is pressed against the pump cylinder wall to form a seal and provide pressurization. 3.7.6 Handle. The pump handle shall be of the D-type and shall have a grip of not less than 3.

21、56 inches (9 mm) inside the grip support. shall be so designed that a complete stroke of the pump may be obtained with the pump handle turned to any position. assembly, including the handle, its components, and its junction with the plunger rod, shall not be less than that of the plunger rod. Whatev

22、er the material of manufacture, it shall be nonabsorbent. lhe pump handle The compression strength of the 3.7.7 Handle lock ina . dev ice. The plunger shaft shall be f quick-acting locking device that, when applied, will secure assembly nearest to the lowest operating position for carry tted with a

23、the plunger ng 3.8 pip tube. The dip tube shall be constructed of brass, stainless steel, or other suitable material, and shall extend to within approximately 0.4 inch (10.2 min) of the bottom of the tank. shall be cut at an angle to prevent blockage. The dip tube shall be securely supported at the

24、point where it emerges from the tank. The end of the tube within the tank 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-55748 3.9 Strainers . Two strainers shall be provided. The two strainers shall be of equal dimensions located at different

25、 points easily accessible in the discharge line between the entry to the dip tube and the entry ports of the cut-off valve. One strainer shall be provided in the cut-off valve. The strainers shall be made of stainless steel, bronze, copper alloy, or any material of equal or superior durability and c

26、orrosion resistance. strainers shall have sufficient structural strength or shall be mounted in such a way that they will not be subject to accidental puncture or collapse. They shall be easily removable and replaceable without special tools, and it is preferable that they be pushed into place rathe

27、r than screwed. Flow through the strainers shall be from the outer surface inward. The strainers shall allow easy passage of liquid. 3.10 Hose. Unless otherwise specified (see 7.2.4), hose shall be of polychloroprene rubber, polyvinyl chloride or similar material and shall be resistant to pesticide

28、formulations or oils. A length 5 feet (1.5 m) with an inside diameter between 0.25 to 0.375 inch (6.4 to 9.5 min) shall be provided with each sprayer. The hose shall have one or more plies of reinforcement made from cotton duck, cotton yarn, or synthetic fiber, of at least two-end yarn. The material

29、 shall be evenly and firmly woven and free from unsightly defects such as dirt, knots and lumps, as well as from irregularities of twist. The tube and cover shall be free from pitting and shall be uniform in thickness. The reinforcement shall be lapped (not sewn) at least 0.5 inch (13 mm) and shall

30、be well frictioned on both sides with a rubber compound that shall firmly join the plies to the rubber tube and cover and to each other. The 3.11 Hose con nections. preferably by the worm-drive clamp. The connections shall have no sharp edges and a minimum of extended projections liable to catch on

31、clothing or other objects. faces or opposing flattened surfaces. Nuts of adequate strength and size may be permitted if couplings are fabricated to enable air-tight and liquid-tight joints to be made by thumb pressure at the highest designated operating pressure. Hoses shall be retained on connectio

32、ns or couplings Threaded terminal connections shall have finished, hexagonal 3.12 Cut-off valve. 3.12.1 Constr uction. All metal parts of the valve body shall be made of brass, bronze, anodized aluminum, or stainless steel. so constructed that inner and outer parts are readily accessible for frequen

33、t cleaning without the use of special tools. 3.12.2 Connec tions. Valves shall be equipped with screw threads at inlet and outlet ports. The outer surfaces of the valve, adjacent to the screw threads, shall have opposing faces, to permit the use of a wrench, if tools are required for its removal. Kn

34、urled faces or wing nuts of adequate shape The valves shall be 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-8-55748 = 9999974 0366921 782 A-A-55748 and size may be used provided that the valve can be loosened and tightened adequately by the pr

35、essure of thumb and fingers alone, without the use of tools, at the highest designated operating pressure. 3.12.3 Valve handle. to permit actuation by hand. The valve handle and all associated parts shall conveniently fit the operators hand without discomfort, and shall have no sharp edges or projec

36、tions. The pressure required to move the handle on a lever-type valve from the closed to the open position shall be not more than 30 pounds per square inch (207 Kpa). be less than 3.5 inches (9 cm) measured from the pivot. 3.12.4 Leakace. around the packing when subjected to normal operating pressur

37、es over a period of one year. 3.13 lance. The lance shall be brass or stainless steel and of seamless construction and shall be easily detachable. It shall have the same thread and size at both ends so that any number of lances in series, or the nozzle alone, may be connected directly to the cut-off

38、 valve housing. Joints shall be leakproof and body facings shall have hexagonal or flattened faces. Nuts of adequate shape and size may be used if couplings are fabricated to enable air-tight and liquid-tight joints to be made by thumb pressure at the highest designated operating pressure. required

39、to ensure a tight fit. inches (40-50 cm) in length, measured between the external faces of the jo i nt s. The handle shall be conveniently located on the valve The length of the valve handle shall not Cut-off valves shall not drip or leak through the valve or When specified, (see 7.2.5), a gasket sh

40、all be Standard lances shall be between 16 and 20 3.14 w. 3.14.1 escriotioq. in which droplets are formed by forcing the spray material through an orifice. It shall consist of a droplet-producing nozzle tip plus a nozzle body and nozzle cap. The nozzle tip shall be removable and replaceable without

41、the use of tools, and shall not leak after reassembly. gaskets of polyethylene or equivalent materials shall be required. The spray nozzle shall be of the hydraulic-energy type When specified (see 7.2.6), 3.14.2 Nozzle assembly. tip shall be constructed from stainless steel, ceramic or brass. 3.15 G

42、askets. All gaskets shall be capable of being readily fitted to the sprayer. the parts into which the joints are made. Polyethylene or gaskets of other suitable material may be used for working with water suspensions. The nozzle assembly consisting of the body, cap and Where possible, gaskets shall

43、be wholly or partially recessed into 3.16 ODtional items. When required, the following items shall be specified (see 7.2.7): 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-5.5748 9999974 O366922 639 = A-A-55748 3.16.1 Air-inlet valve. An air-

44、inlet valve (automobile type) for the purpose of supplying air pressure to the sprayer from an outside pump or high-pressure source. With such an inlet valve, a highly reliable pressure/relief (safety) valve shall be required (see 3.6.4). 3.16.2 Regula ted delivery system. A regulated flow-delivery

45、system, consisting of a complete nozzle assembly and disc flow regulator. discharge rate and distribution pattern shall be as specified (see 7.2.8). 3.16.3 Constant-Dressure reaulator. The sprayer may be equipped with a constant-pressure regulator inserted in the discharge 1 ine, adjustable to produ

46、ce tip pressures in the program operating range, as specified (see 7.2.9). The 3.16.4 Lances. Extra lances for use as extensions. These may be the same length as furnished with the sprayer or as specified (see 7.2.10). telescopic lances may be provided (see 7.2.11). 3.16.5 Swivel nozzles. by hand. A

47、dditional swivel nozzles shall be as specified (see 7.2.12). 3.16.6 Multiple spray n ozzle. A multiple spray nozzle which has an adjustable cone spray and straight stream application. Leakproof Leakproof swivel nozzles that can readily be rotated 3.16.7 Soo seneck attachment. A gooseneck attachment

48、consisting of a section of lance, curved 120 degrees, with 8 inches (20cm) length of tubing, with a coupling on each end to permit attachment to the lance nozzle body. 3.16.8 Goosenec k lance. A nine inch gooseneck lance with an extra 20 inch (50.8 cm) extension lance. Additional fastenings will be

49、required on the tank for the attachment of the lance. A clip for the lance will not be required. 3.16.9 Nylon nozzle body. A nozzle body and cap made of shockproof nylon (containing not less than 2 percent moisture by weight) in place of the normal brass fitting. 3.16.10 Noz zle aaskets. Gaskets of polyethylene, or equivalent material, in such places and number in the nozzle body as required to make that unit easily and quickly disassembled and assembled without tools. such a manner