CIRCULATING PUMPS

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CIRCULATING PUMPS - Technical Documentation

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  • Technical Documentation

    CIRCULATING PUMPS

    CP

    07E

    N

  • Business Units

    Serial Motors

    New Businesses

    Home Appliances

    Project Motors

    We set your ideas in motion. We do not merely manufacture motors, but instead

    turn the ambitious concepts of our customers into modern, innovative and

    reliable products, which are unique and point the way to the future. We bring

    our customers closer to their goals with reliability, creativity and flexibility.

    Vision

  • General

    Circulating pumps with wet rotor and screwed connections, type 1RS

    Circulating pumps with wet rotor and flanged connections, type 1CVR and 1CV

    Circulating pumps with dry rotor and flanged connections, type CS

    III

    Chapters

    1

    I

    II

    IV

  • Index

    I

    2

    Certificates and standards 3

    6

    10

    16

    I General characteristics 4

    Application and c 4

    Installation

    hoice of pump

    5

    6

    7

    8

    9

    10

    11

    12

    1

    1

    1

    1

    II Circulating pumps with wet rotor and screwed connections,

    type 1RS

    III Circulating pumps with wet rotor and flanged connections,

    type 1CVR and 1CV

    IV Circulating pumps with dry rotor and flanged connections,

    type CS

    Application, design and parts

    Technical data and designation

    Diagrams of hydraulic characteristics

    Measurement drawing, dimensions, electrical

    characteristics and masses

    Application, design and parts

    Technical data and designation

    Diagrams of hydraulic characteristics

    Measurement drawings, dimensions, electrical

    characteristics and masses 5

    Application, design and parts 6

    Technical data and designation 7

    Diagrams of hydraulic characteristics 8

    Measurement drawing, dimensions, electrical

    characteristics and masses 20

  • Title of standard Standard no.

    Pumps and pump units for fluids - general safety demands

    Safety of machines - basic terms, general principles for designing

    Part 1: Basic terminology and methodology

    Safety of machines - basic terms, general principles for designing

    Part 2: General principles and specifications

    Safety of home appliance and similar electrical devices.

    Part 1: General requirements

    Safety of home appliance and similar electrical devices.

    Part 1: Special requirements for stationary circulating pumps for heating systems

    Safety of machines - electrical equipment of machines Part 1: General demands

    Rotodynamic pumps. Circulating pumps with electrical power not exceeding 200W

    for heating installations and warm consumption water.Requirements, testing, designation.

    Rotating electric machines. Part 1: Designated characteristics and drive characteristics

    Electromagnetic compatibility. General emission standards.

    Part 1: Apartments, commercial and light industry, environment.

    Electromagnetic compatibility. General emission standards.

    Part 2: Industry, environment.

    Electromagnetic compatibility. General standards of resistance.

    Part 1: Apartments, commercial and light industry, environment.

    Electromagnetic compatibility. General standards of resistance.

    Part 2: Industry, environment.

    Pumps for liquids and pump stations. Noise test. Class 2 and 3.

    Electromagnetic compatibility. Requirements for electrical devices for home

    appliances, for electrical and similar devices. Part 1: Emission.

    EN 809

    EN 292-2

    IEC 60335-1

    IEC 60335-2-51

    EN 60204-1

    EN 1151/99

    EN 60034

    EN 50081-2

    EN 50081-2

    EN 50082-1

    EN 50082-2

    EN 12639

    EN 55014

    EN 292-1

    Circulating pumps hold all the required certificates anddeclarations in accordance with the directives of European Union.Circulating pumps for the domestic appliances are tested andsafety attested by TV Rheinland and meet all the requirements inareas of electromagnetic compatibility.Circulating pumps with dry rotor are accommodated to demandsfrom directives of the "New Approach" and the followingstandards, and are therefore signed with the CE sign.

    Factory of electric machines SEVER was founded in 1923. In theearly eighties of the previous century, the production span hasbeen extended to production of pumps. ATB SEVER is a subsidiaryof ATB Austria Antriebstechnik AG since 2005. and is recognized byit's experience and tradition in production of circulating pumpswith wet and dry rotor.Certification of quality management system has been carried outin 1997.ATB SEVER has a certificate issued by the certification bureau SZSBeograd according to JUS ISO 9001/2001.

    Well esteemed certification bureaus (TV Rheinland, BureauVeritas, Lloyd's Register, CENE laboratory) that certify productsconduct supervision and accept certificate of quality managementsystem.

    Certificates and standards

    3

    StandardsCirculating pumps are in accordance with national laws and meet the requirements of the following standards

    Note:- Upon the customer demand, designs of circulating pumps in accordance with other standards and regulations are also possible.

    I

  • Application and choice of pump

    General characteristics

    4

    Data are valid for systems installed at altitudes up to 300 m abovesea level, and if the altitude is higher, pressure needs to beincreased by 0.1 m for every 100 m of altitude increase.

    Minimal required pressure at the pump inlet

    Application

    Transported fluid

    Choice of pump

    Choosing the circulating pump with wet rotor considering theworking characteristics

    Regular supplies of warm water for consumers in systems ofcentral heating is one of the highly relevant issues of urbancommunities.Circulating pumps are meant for forced circulation of fluids in:

    systems of central heatingcooling systemssolar systemsindustrial applications.

    Depending on the application, presupposed fluids in the systemare:

    softened water of certain quality, according to the regulations,free from acids, bases, residues and hard particleswater mixed with glycol based liquids for anti-freezingproperties

    Choosing the pump needs to consider several issues such as:pump application, rating, dimensions and connection, technicalcharacteristics and areas of application, design, fluid to betransported, used materials.The catalogue lists data needed for correct choice of a pump anddata for correct functioning of the system, without appearance ofcavitation or additional noise due to fluid flow velocity.In order to avoid the appearance and harmful effects of cavitation,it is necessary to take into consideration several parameters:

    static pressure of transported fluidtemperature of transported fluidminimal pressure at the pump inlet.

    Danger of cavitation increases if the transported liquid has highertemperature and lower pressure.

    1

    1)

    NOTE:

    If the content of glycol is more than 20% of fluid, it is necessary to conductcorrection of hydraulic characteristics of the pump.

    I

    50 95

    temperature Co

    110pump of type

    Hs, m

    0,5 8 11

    0,5 6 10

    0,5 8 11

    1RS

    1CVR 40, 50

    1CV 40, 50, 65, 80

    Q m /h3

    Hm

    max

    Circulating pump with wet rotor should be chosen such that therequired working point is on the Q-H characteristic of the pump atthe highest rotational speed or as near to it as possible. If therequired working point is between characteristics of two pumps,then the pump with lower characteristic should be chosen.

    For correct choice of these pumps it is necessary to know reliablythe highest required working point of the pump. Considering theworking characteristics, pumps are being chosen so that workingpoint is in the area of high efficiency, meaning, in the area ofsecond and third third of Q-H characteristics. If the workingconditions are not well known, it is recommended to select thepump of higher power.

    Depending on the application, a certain type of mechanical seal isbeing installed in the pumps with dry rotor.Standard type of mechanical seal is being installed in pumps fortransport of softened water and water mixed with liquid againstfreezing with content of glycol up to 20%.Life of mechanical seal is being decreased if the pump is beingused in difficult environment: water of inappropriate quality withhard particles, high pressure and temperature.

    For correct operation of a system that incorporates a pump withwet rotor it is necessary to have some value of pressure on thepump inlet. Values of the minimal required pressure on the pumpinlet Hs[m] are shown in the table.

    Choosing the circulating pump with dry rotor considering theworking characteristics

    Mechanical seal

    Minimal pressure on the intake of the pump with wet rotor

    Q

    Hm

    m /h3

    higher characteristic

    lower characteristic

    working pointdemanded

  • Installation

    General characteristics

    5

    Cavitation reserve NPSH

    Flow velocity of transported fluid

    Installation of pumps with wet rotor

    Cavitation reserve (NPSH) is pump characteristic and determinesminimal pressure at the pump inlet. It is the boundary value forpump operation at which cavitation does not appear yet or theappearing cavitation shall not cause any damage.Values of NPSH are characteristics quoted in the catalogue, andare obtained by measuring. When choosing the pump, the quotedvalues need to be enlarged by a safety add on of 0.5m.

    Flow rates of transported fluid are shown on some graphs ofQ-H characteristics.During the process of system design, it is necess