1、BRITISH STANDARD BS4115:1993 Specification for Compression knapsack sprayers UDC 632.982.1-182.4:631.348-182.4BS4115:1993 This British Standard, having been prepared under the directionof the Agricultural Machinery and Implements Standards Policy Committee, waspublished under the authorityof the Sta
2、ndards Boardand comes into effect on 15 October1993 BSI08-1999 First published January1967 Second edition October1993 The following BSI references relate to the work on this standard: Committee reference AGE/15 Draft for comment92/79523 DC ISBN 0 580 22415 5 Committees responsible for this British S
3、tandard The preparation of this British Standard was entrusted by the Agricultural Machinery and Implements Standards Policy Committee (AGE/-) to Technical Committee AGE/15, upon which the following bodies were represented: Agricultural Engineers Association British Agrochemicals Association Ltd. Br
4、itish Crop Protection Council British Plastics Federation Health and Safety Executive Imperial College of Science and Technology Long Ashton Research Station Ministry of Agriculture, Fisheries and Food National Farmers Union Silsoe Research Institute Amendments issued since publication Amd. No. Date
5、 CommentsBS4115:1993 BSI 08-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definition 1 4 Design 1 5 Materials 2 6 Performance 2 7 Marking 2 Annex A (normative) Tests 3 Figure 1 Typical apparatus for testing tank fatigue 6 List of refe
6、rences Inside back coverBS4115:1993 ii BSI 08-1999 Foreword This British Standard has been prepared under the direction of the Agricultural Machinery and Implements Standards Policy Committee. It supersedes BS4115-1:1967, which is now withdrawn. A British Standard does not purport to include all the
7、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pa
8、ges1 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS4115:1993 BSI 08-1999 1 1 Scope This British Standard specifies requirements for th
9、e design, materials and performance of compression knapsack sprayers used to apply approved pesticides. It applies to sprayers of over5l capacity. NOTESprayers of5l or less, i.e.garden sprayers, are outside the scope of this standard. 2 Normative references This standard incorporates, by reference,
10、provisions from specific editions of other publications. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to BS4115 only when incorporated in
11、 it by updating or revision. 3 Definition For the purposes of this British Standard, the following definition applies. 3.1 compression knapsack sprayer a device which consists of a tank, equipped with a hand-operated air pump for pressurization. Air pressure in the tank forces the liquid through a h
12、ose, cut-off valve and lance to the spray nozzle NOTEThe device is normally intended to be worn on the operators back but may, optionally, be mounted on a trolley for transport purposes. 4 Design 4.1 The sprayer shall be designed such that it does not leak from any of its component parts under all w
13、orking conditions. When tested in accordance withA.1 andA.2, leakage from the sprayer shall not exceed the limits specified inA.1. When tested in accordance withA.3, there shall be no functional failure of any individual component. When tested in accordance withA.4, the surface retention of any spil
14、t liquid shall not exceed the limits specified inA.4. 4.2 The tank shall have a clearly visible, permanent indicator or a permanently marked embossed line to indicate the maximum operating capacity of liquid; this shall be not more than three-quarters of the total capacity of the tank. 4.3 The tank
15、with all fittings shall be capable of withstanding a pressure of five times the maximum working pressure, which shall be marked clearly and permanently on the tank. 4.4 The total mass of the sprayer with fittings when filled to operating capacity shall not exceed20kg. 4.5 A removable strainer shall
16、be fitted upstream of the trigger valve to ensure reliable operation of the valve. 4.6 A funnel shall be provided to fit into the tank opening. This shall have sufficient open surface area to allow liquid flow without splashing or spillage during the filling of the tank and for displaced air to esca
17、pe. The strainer in the tank filler hole shall be capable of handling the entire tank contents without spillage when tested in accordance withA.5. 4.7 There shall be a device to indicate the pressure inside the tank. There shall also be a device to prevent the pressure in the tank from exceeding7bar
18、 1) . There shall also be a device to provide constant pressure not exceeding4bar at the nozzle. 4.8 The tank orifice shall be designed to allow any residual pressure to escape before the lid can be removed. The orifice shall have a minimum internal diameter of50mm. 4.9 Threaded fittings of the pres
19、surized part of the tank that have a diameter greater than13mm shall be channelled to provide a release of pressure before complete removal of the fitting in order to safeguard the operator. 4.10 The sprayer shall be so designed as to leave a maximum residue of50ml in the tank when exhausted after u
20、se in the normal operating position. 4.11 The pump shall be designed to achieve the maximum working pressure in the tank in not more than50 complete strokes when filled to maximum operating capacity. The pump handle shall be so designed that, when locked in its lowest position, it provides a carryin
21、g handle. As an option, the sprayer may be fitted with a carrying strap, which shall be made of non-absorbent material and shall be at least50mm wide. When tested in accordance withA.6 the strap shall not break. 4.12 The nozzle shall consist of a common body and cap conforming to BS6356-2:1985 or BS
22、6356-6:1992, to which a range of different-sized nozzle tips can be fitted. NOTEA variable cone that requires adjustment by hand is not suitable. 1) 1bar=10 5 Pa=10 5 N/m 2 .BS4115:1993 2 BSI 08-1999 4.13 The sprayer, whether full or empty, shall remain upright and stable when stood on a smooth surf
23、ace inclined at5 horizontal with the lance correctly stored and with the sprayer in any orientation. 4.14 There shall be provision on the sprayer to store the lance and nozzle assembly when not spraying. 4.15 The sprayer shall have no sharp edges or projections that may injure the operator. 4.16 Hos
24、e connections shall be re-usable without the use of sealants. 4.17 The tank outlet shall be located to withstand impact. 5 Materials 5.1 All parts of the sprayer shall be made of materials which shall show no signs of deterioration after being tested in accordance withA.7. 5.2 All parts of the spray
25、er shall be protected against rust and corrosion. NOTEOnly spray mixes recommended by the manufacturer should be used. 5.3 No wood or absorbent materials shall be used in any part of the sprayer. 5.4 Solder containing lead or tin as a major component shall not be used in the sprayer construction exc
26、ept on joints between the lance, nozzle body, or cut-off valve. NOTEStrainers may be fabricated using solder providing they are replaceable items. 6 Performance 6.1 When the sprayer is tested in accordance withA.8, no fatigue failure of the tank or fittings shall occur. 6.2 When tested in accordance
27、 withA.9, the cut-off valve shall show no leakage nor loss in performance. 6.3 When tested in accordance withA.10, the whole sprayer with fittings shall show no signs of impact damage. 6.4 When tested in accordance withA.11, the hose shall show no permanent distortion, leakage or deterioration of th
28、e hose material. 7 Marking The tank of the sprayer shall be marked clearly and permanently with the following information: a) the number and date of this British Standard, i.e.BS4115:1993 2) ; b) the manufacturers name or trade mark; c) year of manufacture; d) manufacturers type number; e) manufactu
29、rers serial number; f) the maximum working pressure. 2) Marking BS4115:1993 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solel
30、y the claimants responsibility. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS4115:1993 BSI 08-1999 3 Annex A (normative) Tests NOTEAll test results should be recorded. A.1 Leakage test A.1.1 Principle The tank is filled with wat
31、er containing a tracer dye for a stated period of time and the whole sprayer is then examined for leaks. A.1.2 Procedure Fill the tank with water and a suitable tracer dye to the recommended fill mark capacity. With the trigger valve in the closed position, place the tank on a bench600mm from the fl
32、oor and hang the hose and trigger/lance assembly from the sprayer. Leave for15min and then visually examine the whole sprayer for leakage, especially noting hose connection, nozzle trigger valve and the filler hole closure. Examine all entries to the tank for hoses, pump, filler hole lid and the rel
33、ief valve if fitted. NOTEThis test should be conducted without any pressure in the tank. It should be conducted with the tank cylinder in the horizontal position. This is because some compression sprayers may leak with no pressure from the filling hole; this is especially the case with elliptical fi
34、ller holes which are sealed by a cam action and rely on tank pressure for sealing. A.1.3 Test results Leakage of spray liquid in a test period shall be within the following limits: a) a maximum of5ml from hose connectors, control valves on the lance and similar sites; b) a maximum of7ml from the tan
35、k, lid and pressure relief valve. A.2 Inversion leak test A.2.1 Procedure Fill the tank in accordance withA.1.2. Invert the sprayer for5min and examine for any leakage. NOTEThis test should be conducted without any pressure in the tank. A.2.2 Test results Leakage of spray liquid in a test period sha
36、ll be within the limits specified inA.1.3. A.3 Hydrostatic test A.3.1 Principle The tank is filled with water containing a tracer dye and pressurized for a stated period of time. The whole sprayer is then examined for leaks. A.3.2 Apparatus A.3.2.1 External piston pump A.3.2.2 Blanking device, to su
37、bstitute for nozzle. A.3.2.3 Metal safety cage A.3.3 Procedure Fill the tank completely with water and a suitable tracer dye. By the use of an external piston pump(A.3.2.1) connected to the spray lance after removal of the nozzle, pressurize the test circuit to maximum working pressure. The trigger
38、valve should be open and the nozzle replaced by a blanking device(A.3.2.2). Examine all areas for leaks after15min of pressurization. After depressurizing the sprayer, remove the hand lance assembly and connect the external test pump to the sprayer hose. Remove or blank off any safety relief valves.
39、 Apply twice the maximum working pressure, plus10% but not less than1000kPa, for1min. The tank shall be enclosed in a safety cage(A.3.2.3). NOTEIt is emphasized that this test is hydrostatic and non-pneumatic. Care is particularly important when conducting this test. If the tank is of non-metallic c
40、onstruction, conduct the test at a temperature of21 C. A.4 Tank surface retention test A.4.1 Principle All external surfaces of the sprayer are wetted with a tracer dye for a specified period of time. The surfaces are then swabbed and the amount of dye recovered is then measured. A.4.2 Procedure Wit
41、h the sprayer standing on a firm horizontal surface, pour a tracer dye solution over the sprayer so as to wet all external surfaces. Wait for a period of2min with the sprayer standing on a clean and absorbent surface. Then swab the outer surfaces of the sprayer with an absorbent material. Determine
42、by fluorimetry or spectrophotometry the quantity of dye absorbed by the swabs. At the same time, inoculate clean swabs with an accurately measured quantity of the tracer which is then recovered to verify the stability and recovery of the tracer from the swabs. A.4.3 Test results A sprayer shall pass
43、 the test if no more than7ml of tracer dye solution are recovered from the surface of the sprayer. A.5 Strainer performance test A.5.1 Principle Liquid is poured into the tank to ascertain that the strainer in the filler hole does not cause spillage. A.5.2 Apparatus A.5.2.1 Unprofiled bucket, of app
44、roximately7l capacity.BS4115:1993 4 BSI 08-1999 A.5.3 Procedure Pour the entire contents of the tank from an unprofiled bucket(A.5.2.1) at a rate of0.22l/s into the tank, through the funnel in the tank filler hole. Examine for spillage. A.6 Strap drop test A.6.1 Principle The sprayer with filled tan
45、k is suspended by its strap and then dropped repeatedly through a specified distance to ascertain that it does not break. A.6.2 Apparatus A.6.2.1 Horizontal bar, of75mm outside diameter. A.6.3 Procedure Fill the tank completely to its design capacity with water and then hang the sprayer by its strap
46、 from a solid support comprising a horizontal bar of75mm outside diameter(A.6.2.1), simulating its carriage on the shoulder of the operator. Then lift it a distance of300mm and allow it to drop and hang by the strap25times. Examine the strap. A.7 Solvent compatibility test A.7.1 Principle The tank i
47、s filled with a test solution which is brought into contact with all parts of the sprayer for a specified period of time. The parts are then examined against their original specification. A.7.2 Materials A.7.2.1 Test solution, consisting of40% (V/V) kerosene,20% (V/V) toluene and40% (V/V) xylene. A.
48、7.3 Procedure A.7.3.1 Fill the tank with test solution(A.7.2.1). Ensure that the test solution is in contact with all parts of the sprayer as in normal use for48h. Replace the nozzle with a bleed valve and open the trigger valve so that air is removed and solvent contact achieved. After cleaning the
49、 sprayer, allow to drain and dry for24h. If the sprayer is supplied with a regulated delivery system, test similarly all seals, gaskets and washers which are part of that system. A.7.4 Test results All seals, gaskets and hoses shall be re-usable. A.8 Tank fatigue and durability test A.8.1 Principle The tank with all fittings is subjected to5000 pressure cycles at0kPa to500kPa or the maximum working pressure to determine that there is no failure of the tank or fittings. NOTEAlthough the distortion may not be readily perceptible to the eye, a compression-sprayer tank be
