1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 12809:2011Crop protection equipment Reciprocating positivedisplacement pumps andcentrifugal pumps TestmethodsBS ISO 12809:2011 BRITISH STANDARDNational forewordThis Britis
2、h Standard is the UK implementation of ISO 12809:2011.The UK participation in its preparation was entrusted to TechnicalCommittee AGE/15, Equipment for crop protection and applicationof liquid fertilizer.A list of organizations represented on this committee can beobtained on request to its secretary
3、.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 67861 5ICS 65.060.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published un
4、der the authority of theStandards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate Text affectedBS ISO 12809:2011Crop protection equipment Reciprocating positive displacement pumps and centrifugal pumps Test methodsMatriel de protection des cultures Pompes volu
5、mtriques alternatives et pompes centrifuges Mthodes dessai ISO 2011Reference numberISO 12809:2011(E)First edition2011-08-01ISO12809INTERNATIONAL STANDARDBS ISO 12809:2011ISO 12809:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All rights reserved. Unless otherwise specified, no part of this publication
6、 may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel.
7、 + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 12809:2011ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o
8、f preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmenta
9、l, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main t
10、ask of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attenti
11、on is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 12809 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture and forestry,
12、 Subcommittee SC 6, Equipment for crop protection.ISO 12809:2011(E) ISO 2011 All rights reserved iiiBS ISO 12809:2011BS ISO 12809:2011INTERNATIONAL STANDARD ISO 12809:2011(E)Crop protection equipment Reciprocating positive displacement pumps and centrifugal pumps Test methods1 ScopeThis Internationa
13、l Standard specifies test methods and the environmental conditions for evaluating the performance of positive displacement pumps and centrifugal pumps designed for crop protection equipment.It is not applicable to pesticide metering pumps for injection systems.2 Normative referencesThe following ref
14、erenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5681, Equipment for crop protection Vocabulary3 Terms and defin
15、itionsFor the purposes of this document, the terms and definitions given in ISO 5681 and the following apply.3.1suction pressurepressure at the suction fitting of the pump3.2reference suction pressurepressure at the suction fitting of the pump, taking into account the pressure drop that is present w
16、hen the pump is installed on the sprayer3.3delivery pressurepressure at the delivery fitting of the pump3.4rated pressuremaximum pressure at which the pump can be used continuously when installed on the sprayer, as declared by the manufacturer3.5rotating speednumber of revolutions of the pump shaft
17、in the considered time interval3.6volumetric flow ratevolume of the testing liquid that flows through the pump3.7power consumptionpower given to the pump by the power source, measured at the inlet shaft of the pump3.8adjustment valvevalve for adjusting the liquid flow ISO 2011 All rights reserved 1B
18、S ISO 12809:20113.9delivery fittingbody of pipelines collecting the liquid coming from the pump and routing it to the delivery pipeline4 Accuracy of measurementsTemperatures shall be measured with an accuracy of 1 C.Length shall be measured with an accuracy of 1 mm.Suction pressure shall be measured
19、 with an accuracy of 1 kPa.Delivery pressure shall be measured with an accuracy of 1 % of the full scale. The full-scale value shall not exceed twice the maximum value that has to be measured during the test.Rotating speed shall be measured with an accuracy of 1 %.Flow rate shall be measured with an
20、 accuracy of 1,5 %.Load torque shall be measured with an accuracy of 5 %, at least for values greater than the 25 % of the maximum torque.5 Test liquidClean water without solids in suspension.6 General test conditions6.1 Test bench6.1.1 The test bench shall have a main circuit containing the devices
21、 for flow control and pressure adjustment. To simulate the installation of the pump on the sprayer, the test bench shall have a “nozzle line” (section A in Figure 1) and an extra circuit (section B in Figure 1) able to simulate the cleaning conditions, with part of the flow coming back directly to t
22、he suction line of the pump.6.1.2 The suction line connects the pump with the tank. It shall be fitted with an air inlet valve, a suction pressure adjustment valve and a suction pressure gauge. For self-priming pumps, the h value shall be (400 100) mm. For non-self-priming pumps, the h value shall b
23、e (100 20) mm. The start of the suction line shall be free, without non-return valves. See Figure 1.6.1.3 The delivery line shall be fitted with a pressure gauge, a pressure adjustment valve and the device for flow rate measurement (see Figure 1). The output of the delivery line shall be connected t
24、o the tank in order to guarantee the re-circulation of the test liquid. Ensure that the back flow does not create turbulence in the suction line.6.1.4 The extra circuit shall be fitted with a by-pass flow-rate adjustment valve and a shut-off valve able to isolate this part of the circuit.6.1.5 The l
25、evel of the liquid in the tank shall be equal (10 mm) to the top of the pump housing. Set the level when all the lines are filled with the test liquid.ISO 12809:2011(E)2 ISO 2011 All rights reservedBS ISO 12809:2011Key1 tank 8 delivery pressure adjustment valve2 air inlet 9 shut-off valve3 air inlet
26、 valve 10 flow rate measurement4 suction pressure adjustment valve 11 nozzle flow-rate adjustment valve5 suction pressure measurement 12 shut-off valve6 pump to be tested 13 shut-off valve7 delivery pressure measurement 14 by-pass inputA nozzle lineB extra circuit to simulate the cleaning conditions
27、Figure 1 Hydraulic circuit6.2 Installation of pumpThe pump shall be fixed on the test bench following the indications given by the manufacturer, and especially those concerning the positioning of the pump and the dimension of the fixing device.The pump shall be connected to the test bench by non-col
28、lapsible pipelines, both at the suction and delivery side.The internal diameter of the suction line shall be as follows: for hoses, equal to or greater than (max. + 5 %) the internal diameter indicated by the manufacturer; for fittings, equal to or greater than (max. + 20 %) the internal diameter in
29、dicated by the manufacturer.The internal diameter of the delivery line shall be equal to or greater than (max. + 50 %) that indicated by the manufacturer.6.3 Environmental conditionsThe air and testing liquid temperatures shall be not less than 10 C and not more than 35 C, except for centrifugal pum
30、ps, for which the testing liquid temperature shall be not less than 20 C and not more than 30 C.6.4 Pressures6.4.1 Suction pressureThe suction pressure, expressed in kilopascals (kPa), shall be measured at the suction fitting indicated in 6.1.ISO 12809:2011(E) ISO 2011 All rights reserved 3BS ISO 12
31、809:20116.4.2 Reference suction pressureThe reference suction pressure value shall be (25 2) kPa.That reference value shall be set once at the beginning of the test (by means of valve 4, shown in Figure 1) at the maximum rotating speed indicated by the manufacturer and with the delivery pressure set
32、 to (5 1) % of the rated pressure. It will rise during the test, reducing the rotating speed, because of the reduction of the pressure drop.6.4.3 Delivery pressureThe delivery pressure, expressed in kilopascals (kPa), shall be measured at the delivery fitting, before the adjustment valve.6.5 Rotatin
33、g speedThe rotating speed shall be expressed in revolutions per minute (r/min).6.6 Flow rateThe flow rate shall be expressed in cubic decimetres per minute (dm3min1).The flow rate can be determined using a flow meter or by collecting the liquid in a separate tank for a measuring time and weighing.Du
34、ring the measurement, the level of the liquid in the suction tank shall not change by more than 50 mm from the level specified in 6.1.5.6.7 Load torqueThe load torque, expressed in newton metres (Nm), shall be determined by measurements on the inlet shaft of the pump.6.8 Power consumptionThe power c
35、onsumption, indicated in kilowatts (kW), shall be calculated as the rotating speed multiplied by the load torque, using the following equation:Pn C= pi30 000whereP is the power, in kilowatts (kW);n is the rotating speed, in revolutions per minute (r/min);C is the load torque, in newton metres (Nm).7
36、 Test methods7.1 GeneralAfter installation of the pump on the test bench and before starting the tests, ensure visually that all connections work properly without leakage at the maximum pressure and without air inlet at the maximum depression in the suction line.If present, set the pressure of the p
37、ressure damper as indicated by the manufacturer.ISO 12809:2011(E)4 ISO 2011 All rights reservedBS ISO 12809:2011Use the test liquid specified in Clause 5.7.2 Flow rate at the reference suction pressure7.2.1 Test conditionsEnsure that valves 11, 12 and 13, as indicated in Figure 1, are closed.Set the
38、 reference suction pressure as defined in 6.4.2 by means of valve 4, as indicated in Figure 1.Use valve 8, as indicated in Figure 1, for the adjustment of the delivery pressure.Before each setting, ensure that the pump is correctly primed.The tests shall be performed setting the delivery pressure so
39、 as to have the maximum and minimum pressures indicated by the manufacturer and at least two other values equally spaced in the range. In every case, the test shall be performed at the maximum and minimum rotating speeds of the pump, as indicated by the manufacturer, and at least at two other values
40、 equally spaced in the range.If the pump has variable volume, perform the test at the maximum and minimum volumes, as indicated by the manufacturer, and at least at two other values equally spaced in the range.For each combination of the above parameters, measure the flow rate.7.2.2 ResultsReport th
41、e results of these tests in a chart or graph (for an example, see A.1).7.3 Flow rate at variable suction pressure7.3.1 Test conditionsEnsure that valves 11, 12 and 13, as indicated in Figure 1, are closed.The tests shall be performed with the delivery pressure set to (10 1) % of the rated pressure,
42、which shall be at least (100 10) kPa, and at the maximum rotating speed, as indicated by the manufacturer.Start with the suction pressure set to (60 2) kPa and repeat the test at increasing suction pressures in steps of (10 2) kPa up to (10 2) kPa.Measure the flow rate for each suction pressure.7.3.
43、2 ResultsReport the results of these tests in a chart or graph (for an example, see A.2).7.4 Power consumption7.4.1 Test conditionsThe test conditions shall be as specified in 7.2.1.7.4.2 ResultsReport the results of these tests in a chart or graph (for an example, see A.3).ISO 12809:2011(E) ISO 201
44、1 All rights reserved 5BS ISO 12809:20117.5 Priming capacity Normal flow7.5.1 Test conditionsThe test shall be performed under the following conditions: at the maximum rotating speed, as indicated by the manufacturer; with the delivery pressure set to (5 1) % of the rated pressure and to at least (1
45、00 10) kPa; with the suction pressure set to the reference suction pressure defined in 6.4.2; with lengths of suction line equal to (3 0,1) m, (5 0,1) m and (7 0,1) m, and with the suction line in the horizontal position.During the test, record the value of the delivery pressure at intervals not gre
46、ater than 0,5 s.7.5.2 Test procedureEnsure that valves 11, 12 and 13, and air inlet valve 3, as indicated in Figure 1, are closed.Start the pump, wait until it is correctly primed and adjust to reach the specified conditions (suction pressure, delivery pressure, rotation speed). Open the air inlet v
47、alve for (30 1) s. Shut off the air inlet valve and simultaneously start the pressure recording. Stop the test when the delivery pressure reaches the set value ( 5 %) and remains at that level for at least 5 s.Determine the time passed between the closure of the air inlet valve and the achievement o
48、f the set pressure.For each length of suction line, repeat the test three times.7.5.3 ResultsReport the three values of time measured and their mean value for each test, in seconds (s).7.6 Priming capacity Re-circulation circuit7.6.1 Test conditionsThe test shall be performed under the following con
49、ditions: at the maximum rotating speed, as indicated by the manufacturer; with the delivery pressure set to (10 1) % of rated pressure and to at least (100 10 kPa); with the suction pressure set to the reference suction pressure defined in 6.4.2; with lengths of suction line equal to (3 0,1) m, (5 0,1) m and (7 0,1) m, and with the suction line in the horizontal position; with the length of the by-pass line set to (1 0,1) m, with the same diameter as the suct
