CEN/TC 197 - Pumps

This document specifies methods and procedures for testing, calculating, and determining the Energy Efficiency Index (EEI) of submersible multistage pump units.

This document specifies performance requirements (methods and procedures for testing and calculating) for determining the Minimum Efficiency Index (MEI) of rotodynamic glanded water pumps for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this document are described in the Annex A. These pumps are designed and produced as duty pumps for pressures up to 16 bar for end suction pumps and up to 25 bar for multistage pumps, for all pumps designed for fluid temperatures between −10 °C and +120°C. Also covered are 4" (10,16 cm) and 6" (15,24 cm) submersible multistage pumps designed for fluid temperatures between 0 °C and 90 °C.

This document contains technical safety requirements for the design, equipment and testing of brushless vehicle washing systems and vehicle washing systems with brushes for, indoor and outdoor operation, i.e. roll-over vehicle washing systems, vehicle washing tunnels, manually movable vehicle washing facilities.
This document does not apply to hand-guided high pressure cleaners which are covered by
EN 60335 2-79:2012, to water recycling systems, buildings and doors for entering the traffic zone, for powered ride-on machines and powered walk-behind machines with a traction drive.
NOTE   Signals (example doors, lighting systems) can be provided by the vehicle washing system.
This document contains requirements for the protection of persons and objects from accidents and damages during use and operation of vehicle washing systems.
Persons to be protected are:
-   operators,
-   maintenance and monitoring personnel,
-   persons in the vicinity of vehicle washing systems,
-   persons sitting in the vehicle during cleaning.
Objects to be protected are:
-   vehicles.
Significant hazards associated with vehicle washing systems are listed in Clause 4. These hazards have been established by a risk assessment according to EN ISO 12100 and require measures to eliminate the hazard or to reduce the risk. These measures are specified in Clause 5 of this document.
The safety requirements assume that vehicle washing systems are regularly maintained by trained and competent persons according to the manufacturer's information and that the operators, with the exception of users of self-service washing systems, have been instructed in the handling of vehicle washing systems.

This document specifies methods and procedures for testing, calculating and determining the Energy Efficiency Index (EEI) of rotodynamic glanded single pump units for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this document are described in the normative Annex A.

TC origin: text change in text below Figure A.3 and correction of Formula (C.3)

This document contains safety-related requirements for high pressure water jet machines with drives of all kinds (e.g. electric motor, internal combustion engine, air and hydraulic) in which pumps are used to generate pressure. This document deals with all significant hazards, hazardous situations and events arising during assembly, erection, operation and servicing relevant to high pressure water jet machines, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Annex ZA). All references to high pressure water jet machines within this document includes machines for one or more of the following industrial applications:
- cleaning;
- surface preparation;
- material removal;
- readjustment of concrete;
- cutting.
NOTE 1 List of significant hazards is given in informative Annex D.
This document applies to mobile and fixed high pressure water jet machines, in which the water pressure is generated by a pressure generator/pump and in which the maximum allowable working pressure is more than the upper limit fixed in the scope of EN 60335-2-79:2012.
NOTE 2 35 MPa is currently the upper limit for machines covered by EN 60335-2-79:2012.
This document does not cover:
- requirements of the Pressure Equipment Directive 2014/68/EU;
NOTE 3 In some cases, specific parts can be in the scope of that directive, but their application is not dealt with in this document.
- high pressure cleaners which are dealt with in EN 60335-2-54:2008, EN 60335-2-54:2008/A11:2012, EN 60335-2-54:2008/A11:2012/AC:2015, EN 60335-2-54:2008/A1:2015 and EN 60335-2-79:2012;
NOTE 4 EN 60335-2-54:2008, EN 60335-2-54:2008/A11:2012, EN 60335-2-54:2008/A11:2012/AC:2015 and EN 60335-2-54:2008A1:2015 applies to steam cleaners for household use. EN 60335-2-79:2012 applies to high pressure cleaners having a rated pressure not less than 2,5 MPa and not exceeding 35 MPa, as well as steam cleaners and those parts of hot water high pressure cleaners incorporating a steam stage which have a capacity not exceeding 100 l, a rated pressure not exceeding 2,5 MPa and a product of capacity and rated pressure not exceeding 5 MPa.
- additional hazards due to the incorporation of high pressure water jet machines into other process-technology machines;
- specific hazards associated with explosive atmospheres, use on ships or ambient temperatures outside the range 5 °C to 40 °C;
- hazard due to the nature of liquids used for jetting, other than that due to pressure;
- hazards associated with the drives or specific hazards due to any heat generation function. However, the hazards due to high temperatures of touchable surfaces are dealt with;
- high pressure water jet machines which are manufactured before the date of its publication as EN;
- hazards due to noise for what concerns the declaration of noise emission values in the instructions.
NOTE 5 Noise emission measurement and noise declaration will be dealt with in an upcoming amendment to this document.
Tests according to this document are type tests unless they relate to routine (informative) tests to be carried out during series manufacture.
NOTE 6 Routine tests are described in informative Annex C.
Compliance with EN 1829-1 and EN 1829-2 provides the full requirements for high pressure water jet machines.

This document specifies all the information necessary to carry out efficiently and under standardized conditions the determination, declaration, and verification of the airborne noise emission of liquid pumps or pump units (see 4.1). It specifies the noise measurement methods and the operating and mounting conditions that shall be used for the test.
Noise emission characteristics include emission sound pressure levels at specified positions and the sound power level. The determination of these quantities is necessary for
—          declaring the noise emission values, and
—          purpose of noise control at source at the design stage.
The determination of these quantities is also necessary for comparing the noise emitted by liquid pumps on the market.
The use of this document ensures the reproducibility of the determination of the airborne noise-emission characteristics within specified limits determined by the grade of accuracy of the basic airborne noise measurement method used. Noise measurement methods according to this document are engineering methods (grade 2) and survey methods (grade 3).
This document does not deal with the characterization of the structure-borne sound and liquid-borne noise generated by liquid pumps.
NOTE       This document is specified in EN 809+A1 for noise measurements of the pump (or pump unit).

This document describes a methodology to evaluate energy efficiency performance of pump units based on a non-dimensional numerical value called Energy Efficiency Index (EEI).
This document covers pump units consisting of:
-   one single or several rotodynamic water pump(s), including where integrated in other products, and driven by a motor system, consisting of an electrical motor, and either:
-   a terminal box which only enables to operate the pump unit at constant motor stator frequency and thereby (nearly) constant rotational speed, or
-   a CDM (Complete Drive Module) which enables to operate the pump unit at variable rotational speed depending on a varying demand of flow rate and/or discharge or differential pressure.
NOTE   A CDM is also often called VSD (Variable Speed Drive).
Pump units as defined above are treated as extended products in respect to their energy efficiency.

This document specifies methods and procedures for testing, calculating and determining the Energy Efficiency Index (EEI) of rotodynamic glanded single pump units for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this document are described in the normative Annex A.

This document sets the requirements for conducting and reporting the results of a pumping system energy assessment (hereafter referenced as "assessment") that considers the entire pumping system, from energy inputs to the work performed as the result of these inputs.
The objective of a pumping system energy assessment is to determine the current energy consumption of an existing system and identify ways to improve system efficiency.
These requirements consist of
—          organizing and conducting an assessment,
—          analysing the data from the assessment, and
—          reporting and documenting assessment findings.
This document is designed to be applied, to open and closed loop pumping systems typically used at industrial, institutional, commercial, and municipal facilities, when requested.
This document is focused on assessing electrically-driven pumping systems, which are dominant in most facilities, but is also applicable with other types of drivers, such as steam turbines and engines. The document does not
a)    specify how to design a pumping system,
b)    give detailed qualifications and expertise required of the person using the International Standard although provides a list of body of knowledge in Annex C,
c)    address the training or certification of persons,
d)    specify how to implement the recommendations developed during the assessment, but does include requirements for an action plan,
e)    specify how to measure and validate the energy savings that result from implementing assessment recommendations,
f)     specify how to make measurements and how to calibrate test equipment used during the assessment,
g)    specify how to estimate the implementation cost or conduct financial analysis for recommendations developed during the assessment,
h)    specify specific steps required for safe operation of equipment during the assessment. The facility personnel in charge of normal operation of the equipment are responsible for ensuring that it is operated safely during the data collection phase of the assessment,
i)     address issues of intellectual property, security, confidentiality, and safety.

This European Standard gives details of a test procedure for packings to be used to seal the stuffing boxes of centrifugal pumps. It gives provisions on the design of test equipment, standard test parameters and reporting criteria. It does not specify performance criteria which should be agreed between supplier and customer, but does define 3 tightness classes.
When necessary, this European Standard is also applicable to packings used on other rotary equipment such as mixers and agitators.

This European Standard specifies a test code for the vibro-acoustic characterization of glandless circulators with pump housing having a rated power input P1 ≤ 200W, intended to be used in heating installations, domestic hot water service installations and cooling systems, and is limited to glandless circulators with threaded connections of 11/2 inch. The test code comprises the test rig, the measurement method and the test conditions.
This European Standard applies to glandless circulators, which are manufactured after the date of issue of this European Standard.
The characterization principle is based on measuring the structure-borne and the fluid-borne power transmitted respectively by vibration and pressure fluctuations in the pipe connected to a glandless circulator.

This European Standard specifies the procedure for calculating the energy efficiency index (EEI) of standalone circulators.

This European Standard specifies general performance requirements and general requirements and procedures for testing and calculation of the energy efficiency index (EEI) for glandless circulators having a rated hydraulic output power of between 1 W and 2500 W designed for use in heating systems or cooling distribution systems.
All known hazards which are likely to occur at normal installation and operation are covered by the European Standards EN 809 and EN 60335-2-51.
As regards safety for electro-technical parts of circulators, EN 60335-2-51 applies.

This European Standard specifies the procedure for calculating the energy efficiency index (EEI) of circulators integrated in products.

ISO 17769-1:2012 specifies terms, letter symbols and units related to the flow of liquids through rotodynamic and positive displacement liquid pumps and associated installations. It serves as a means of clarifying communications between the installation designer, manufacturer, operator and plant constructor. It identifies the units in common usage, but all additional legal units can be used.
ISO 17769-1:2012 deals solely with conditions described by positive values for the rate of flow and pump head.

ISO 17769-2:2012 specifies terms, letter symbols and units related to the flow of liquids through rotodynamic and positive displacement liquid pumps and associated installations. It serves as a means of clarifying communications between the installation designer, manufacturer, operator and plant constructor.
ISO 17769-2:2012 identifies the units in common usage, but all additional legal units can be used.
ISO 17769-2:2012 deals mainly with pumping systems.

ISO 9906:2012 specifies hydraulic performance tests for customers' acceptance of rotodynamic pumps (centrifugal, mixed flow and axial pumps). It is intended to be used for pump acceptance testing at pump test facilities, such as manufacturers' pump test facilities or laboratories. ISO 9906:2012 can be applied to pumps of any size and to any pumped liquids which behave as clean, cold water.
It specifies three levels of acceptance:
grades 1B, 1E and 1U with tighter tolerance;
grades 2B and 2U with broader tolerance;
grade 3B with even broader tolerance.
It applies either to a pump itself without any fittings or to a combination of a pump associated with all or part of its upstream and/or downstream fittings.

This European Standard deals with the special technical safety requirements for liquid pumps and pump units operating with agrifood-stuff. This European Standard is intended to be used with EN 809 to give the additional requirements for hazards arising from the pumping of substances intended for human and domestic animal consumption (see Clause 4).
This European Standard also establishes requirements and/or measures for the reduction of risks during use, including misuse foreseeable by the manufacturer.
This European Standard is not intended to be used for pumps and pump units at any stage in the public water supply, nor for pumps handling pharmaceutical products, nor for any other application for which more appropriate standards exist.
The pumps and pump units covered by this European Standard are the following:
- rotodynamic pumps;
- rotary positive displacement pumps;
- reciprocating positive displacement pumps.
Pumps dealing with agrifood-stuff which are not indicated in this scope are potentially covered by
EN 1672-2:2005+A1:2009.
This document is not applicable to liquid pumps for agrifoodstuff applications which are manufactured before the date of its publication as an EN.

MINOR AMENDMENT!!!     MINOR AMENDMENT!!!     MINOR AMENDMENT!!!     MINOR AMENDMENT!!!

MINOR AMENDMENT!!!     MINOR AMENDMENT!!!     MINOR AMENDMENT!!!     MINOR AMENDMENT!!!

Specifies basic dimensions and gives alternative numbers and locations of baseplate fixing holes to suit individual installations. Covers the baseplate numbers from 2 to 9. The data given are intended primarily for use with pumps in accordance with ISO 2858, coupled to foot-mounted electric motors for installation on a foundation.

Specifies the main parameters and describes the pump designation which consits of three numbers. The table covers flange sizes from 50 mm up to and including 200 mm. A figure shows the side view and the front view of the pump.

TC - Correction of 6.1.1, last sentence - Mechanical engineering

2010-06-14 EMA: This standard has been cited in OJ C97/2010 (2010-04-16) under directive 94/9/EC whereas consultant had specified that the standard should not be cited under that directive. The box has been unticked (see e-mail from PM sent to dataservice on 2010-06-10).
2010-05-26 EMA: Consultants added following e-mail from PM sent to dataservice on 2010-05-26.
TC - Correction brought to an amended paragraph in 5.2.2.1 in the English mother reference version.

2010-04-26 EMA: Consultants added following e-mail from PM sent to dataservice on 2010-04-26.
TC - Correction of figure (replacement of figure) in 6.2, Table 6, 1st column and 1st line - Mechanical engineering - Machinery

2010-04-26 EMA: Consultants added following e-mail from PM sent to dataservice on 2010-04-26.
TC - Correction of a mathmatical sign in Figure 23a) (replacement of Figure 23a)) - Mechanical engineering - Machinery

This standard specifies the hydrostatic test procedure to be applied to pressure containing parts of all types of liquid pumps including any auxiliary equipment making up a pump unit as described in the scope of EN 809:1998, except :
-   domestic water pumps within the scope of EN 60335-2-41:1996 or EN 60335-2-51:1997 ;
-   domestic circulation pumps within the scope of EN 1151:1999 ;
-   submersible pumps within the scope of prEN 13386:1998 ;
-   fire-fighting pumps with primers within the scope of prEN 1028-1:1993 and prEN 1028-2:1993 ;
-   pump parts with a maximum allowable working pressure below 0.1 bar.
Requirements are included for applying a hydrostatic test at different pressures to separate zones within a pump which are subject to different allowable maximum working pressures.
This standard is for pumps and pump units which are placed upon the market after the publication date of the standard.

This European Standard establishes the technical safety requirements for:
-   constructing;
-   assembling;
-   erecting;
-   operating;
-   servicing;
a liquid pump or pump unit. It contains a list of significant hazards, which can arise with the use of a liquid pump or pump unit, and establishes the requirements and/or protective measures which will lead to a reduction of the risks.
Liquid pumps covered by this European Standard are:
-   rotodynamic pumps;
-   rotary positive displacement pumps;
-   reciprocating displacement pumps;
supplied separately without drive (electric motor or internal combustion engine).
In general, pumps are defined as being terminated by their inlet and outlet connections as well as by their shaft ends. Pumps supplied in this form are usually called bareshaft pumps. They are 'machines' in the definition of the Machinery Directive.
The assembly of a bareshaft pump with its driver can require measures that are outside the scope of this European Standard.
Pump units are described as:
Liquid pumps together with a driver and including transmission elements, baseplates, and any auxiliary equipment.
This European Standard does not deal either with the technical safety requirements for the design or manufacture of drivers nor of auxiliary equipment. It does not set down either requirements for the risks directly arising from means provided for the portability, transportability and mobility of pump units during or between periods of their operation, nor the requirements for transmission shafts linking a tractor or other
self-propelled machinery to a pump.
This European Standard does not cover pumps and pump units for the following applications:
-   pumps and pump units whose only power source is directly applied manual effort;
-   pumps and pump units for medical use used in direct contact with the patient;
-   pumps and pump units specially designed or put into service for nuclear purposes which, in the event of failure, can result in an emiss

This standard covers the requirements for sealless rotodynamic pumps that are driven with permanent magnet coumpling, or with canned motor and are mainly used in chemical process, water treatment and petrochemical industries.

This CEN Technical Report lays down stipulations relating to installation conditions for sudden change in section or direction (elbows, tee fittings, junctions) and the most widely used accessories at the inlet and outlet of pumps (valves and fittings) in order to minimise the effect of disturbances in the flow of liquid thereby created upstream and downstream from the pump and on the operation of the pump.
NOTE 1   The recommendations given in this document permit to solve a majority of the most current cases.
These recommendations relate to three aspects of installation:
   the fitting of the pump to pipework by convergent and divergent pipes;
   in the case of elbows, tees and branching, their direction with respect to the axis of the pump;
   the minimum clearances to be adhered to between a disturbing (elbow, valve, etc.) and the mounting flange of the pump.
This document applies to the installation of rot dynamic pumps (centrifugal, mixed flow and axial flow) fitted in piping. It applies to pumps having intake diameters equal to or less than 500 mm. The recommendations may be adapted in agreement with the pump manufacturer for intakes having dimensions exceeding 500 mm or for special applications. This document is not applicable to pumps of which the inlet is located in reservoirs, sumps or tanks and which will be dealt with in a subsequent standard.
The recommendations in this document are only valid under the following conditions:
   Newtonian fluids having a maximum viscosity of 2.10-4 m2/s;
   occluded gas content at pumping temperature and inlet pressure not exceeding 2 % by volume for water and
                4 % for other fluids;
   solids content (small particle size, such as sand) not exceeding 1 % by volume, nor 1 % by weight;
   in piping with diameters D1 and D2 (see Figure 11), flow rate velocity, should be in the following ranges:
   3 m/s to 5 m/s at inlet;
   4 m/s to 10 m/s at outlet.

This CEN Technical Report provides information for the calculation of maximum permissible forces and moments allowed on the flanges of various types of horizontal and vertical shaft rotodynamic pumps, caused by the reaction to pipework that is rigidly connected to the installation. This document does not take into account the effect of any elastic or deformable linkages, such as bellows, elastic joints, self butting sliding joints, etc.
This CEN Technical Report is not applicable to multistage monobloc pumps, whose outlets are remote from the installation plane, or to horizontal shaft pumps mounted vertically for installation reasons, such as, fixing to a vertical wall.

1.1   This technical Report contains recommendations for the design of pump intakes and the installation of pumps.
As far as possible, these recommendations should be adhered to in order to obtain correct operation of the plant.
These recommendations are applicable regardless of the flow rate of the plant:
   plant which works with clear water (or relatively unclouded) and relatively non-aerated water or any other liquid having physical and chemical properties which are similar to those of water;
NOTE   This document nevertheless contains several general recommendations for operation with cloudy (or very cloudy) water.
   pumping plant which has its own floor.
1.2   This document deals with various intake configurations:
   Clause 3 contains recommendations which apply to intakes with vertical suction inlet;
   Clause 4 contains recommendations applicable to intakes with top suction inlet;
   Clause 5 contains recommendations applicable to intakes with floor suction inlet;
   Clause 6 contains recommendations applicable to intakes with side-wall suction inlet.

This European Standard applies to hoses, hose lines and connectors intended to be used with high-pressure water jet machines within the scope of prEN 1829-1.
This European Standard deals with all significant hazards, hazardous situations and events relevant to the equipment in the scope, when it is used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see clause 4).
This European Standard deals with safety requirements to minimise the significant hazards which can arise from assembling, operating and servicing of hoses, hose lines and connectors for use with high pressure water jet machines (see clause 5).
NOTE 1   This European Standard does not cover leak shields since they are not part of a hose line.
The hazard due to scalding from hot liquid or from irritation / burning of any added chemicals is not covered in this European Standard.
This European Standard is not applicable to hoses, hose lines and their accessories, which are manufactured before the date of its publication as EN.
NOTE 2   For products of similar application that are outside of the scope of this European Standard and for which there is no alternative document available the relevant Clauses of this European Standard may be used.

TC - Correction of last paragraph of 9.5 (list of inspection documents extended)
AFNOR - Translation improvement in the 1st paragraph of Clause 1

This European Standard describes specified types of acceptance tests for rotary positive displacement pumps for applications other than fluid power, excluding progressing cavity and peristaltic type pumps.
This European Standard applies to the testing of pumps with and without drivers.
This European Standard covers a selection of tests to establish a uniform demonstration of the pump's ability to perform satisfactorily. It does not, however, cover all tests that may be needed for particular pump types or applications, e.g. tests for hazardous liquids or single shaft multiple pump units. Furthermore, it does not cover any noise and vibration tests, priming tests nor any hydrostatic pressure tests. Some pump types with integral relief valves may require more extensive relief valve tests than described in this European Standard. For dosing and metering applications, further tests to demonstrate the dosing and metering abilities of the pumps may be necessary.
NOTE   Extrapolation of test results to non-tested pumps is not described in this European Standard. Such extrapolation could be made or mass-produced pumps with reference to pertinent quality assurance methods and standards.

ISO - Taking over of an ISO Technical Corrigendum

ISO 16330:2003 specifies the technical requirements, other than safety and testing, for reciprocating positive displacement pumps and pump units. It applies to pumps which utilize reciprocating motion derived from crankshafts and camshafts and also direct-acting fluid driven pumps. It does not apply to reciprocating positive displacement pumps, nor pumping water, where the whole pump is lubricated with the liquid being pumped.

1.1 This International Standard specifies the requirements for seal-less rotodynamic pumps that are driven with
permanent magnet coupling (magnet drive pumps) or with canned motor, and which are mainly used in chemical
processes, water treatment and petrochemical industries. Their use can be dictated by space, noise, environment
or safety regulations.
Seal-less pumps are pumps where an inner rotor is completely contained in a pressure vessel holding the pumped
fluid. The pressure vessel or primary containment device is sealed by static seals such as gaskets or O-rings.
1.2 Pumps will normally conform to recognized standard specifications (e.g. ISO 5199, explosion protection,
electromagnetic compatibility), except where special requirements are specified herein.
1.3 This International Standard includes design features concerned with installation, maintenance and
operational safety of the pumps, and defines those items to be agreed upon between the purchaser and
manufacturer/supplier.
1.4 Where conformity to this International Standard has been requested and calls for a specific design feature,
alternative designs may be offered providing that they satisfy the intent of this International Standard and they are
described in detail. Pumps which do not conform with all requirements of this International Standard may also be
offered providing that the deviations are fully identified and described.
Whenever documents include contradictory requirements, they should be applied in the following sequence of
priority:
a) purchase order (or inquiry, if no order placed), see annexes D and E;
b) data sheet (see annex A) or technical sheet or specification;
c) this International Standard;
d) other standards.

++TC forecast updated following TC Resolution 5/2000 (sj 2000-12-11)++

This European Standard defines the principal dimensions for the internal installation of single and multiple mechanical seals with (rotating) spring units into the pump sealing cavity according to ISO 3069 as minimum cavity dimensions as typical for centrifugal pumps in accordance with EN 22858 and EN 733. It also gives the seal designations and material codes to be used.

This European Standard establishes the technical documentation for the enquiry, proposal, purchase order for rotodynamic pumps during contract execution or deliveries to the industry.

This European Standard defines the procedures to be used for the verification of the guaranteed performance of a pump when supplied together with a motor and an inverter to control operating speed. It defines also the method of demonstrating the compatibility of the elements forming the pump unit. The application of this standard should be by agreement between the purchaser and the supplier.

This European Standard specifies the dimensional requirements for the installation of machine tool electrical motor driven coolant pump units of the sump and suction type. This standard is applicable to coolant pump units having nominal capacities in the range 20 litres/min to 250 litres/min. This standard does not apply to coolant pump units of positive displacement pump design.

This standard specifies the technical requirements, other than safety and testing, for rotary positive displacement pumps and rotary positive displacement pump units. This standard does not apply to rotary positive displacement pumps for fluid power applications.

Forms the first of a set dealing with tests of pumps and specifies precision class tests (former class A). Engineering class I and class II tests (former classes B and C) will be the subject of a further standard. Defines the terms and quantities that are used and specifies general requirements for tests. Does not specify constructional tolerances.

Covers class III requirements for centrifugal pumps of single stage, multistage, horizontal or vertical construction (coupled or close-coupled) with any drive and any installation for general application. Includes design features concerned with installation, maintenance and safety of such pumps including baseplate, coupling and auxiliary piping but excluding the driver, if it is not an integral part of the pump.

Consists of a basic text covering general requirements. The technical requirements refer only to the pump unit. Includes design features concerned with installation, maintenance and safety of such pumps, including baseplate, coupling and auxiliary piping. The selection of the class to be used is made in accordance with the technical requirements for the application for which the pump is intended. The class chosen is to be agreed between purchaser and manufacturer/supplier.

This European Standard specifies the designations, nominal duty point and main dimensions of heavy duty side channel pumps with a nominal pressure of 40 bar. NOTE: Depending on special circumstances e.g. temperature, materials, sealing ofthe shaft etc., excess operating pressure need not attain the value of the nominal pressure under any circumstances.