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Data sheet ERHARD non slam nozzle check valve
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Data sheet ERHARD non slam nozzle check valve - flowtec.at · ERHARD non slam nozzle check valve ... water cycle – from hydrants, butterfly valves and knife gate valves through

May 25, 2018

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  • Data sheet ERHARD non slam nozzle check valve

  • 2 ERHARD non slam nozzle check valve

    ERHARD non slAm nozzlE cHEck vAlvE

    The innovative non-return valve for maximum economyAn optimised flow cross-sectional area as well as a valve disc and valve stem gasket designed for minimum flow resistance ensure minimum head losses with the ERHARD non slam nozzle check valve. This enables highly economic operation especially in pumping stations. Valve disc, spring and closing travel have been engineered in such a way [2] that the ERHARD non slam nozzle check valve reacts that quickly even in highest flow delays (e. g. in a vertical line) that only minimal return flow velocities occur, with the flow being gently slowed, thus reducing water hammers to a minimum.

    Thanks to its compact form (face-to-face dimension to DIN EN 558, basic line 14), the adjustable spring force as well as its use in any installation position, the ERHARD non slam nozzle check valve can be used for a wide range of applica-tions up to pressure ratings of PN 40 in the natural and drinking water sector as well as in purified wastewater. The body is made from spheroidal cast iron EN-JS1030 (EN-JS1025 for PN 40), the body insert is made from bronze. The resilient-seated piston is rubberised to W270. All internal parts can be easily replaced and the guide bushes are maintenance-free. The ERHARD non slam nozzle check valve is internally enamelled for protection against corrosion and the outside has been coated with EKB in blue. Position indication is optionally available [3].

    1 2 3

    operating instructionsBA43E000

    with position indication: BA43E001

  • 3 ERHARD non slam nozzle check valve

    THE ovERviEw

    Brief specifications:valve disc (Dn80-300): zinc-free bronze / elastomer KTW / W270 valve ring (Dn350-600): 1.4404 / elastomer KTW / W270internal body: zinc-free bronzeGuiding stem: stainless steelGuiding bush: high-performance polymerBody: ductile cast ironspring: stainless steelProtection outside: ERHARD EKB fusion bonded epoxyProtection inside: ERHARDvitreous enamel

    Dimensions and weights

    Area of operations Minimum back-pressure DN80-300: 4 mWSMinimum back-pressure DN350-600: 8 mWSMax. working temperature +60 CFull opening at approx. 2 m / s

    We need the following data for preparing a quotation:Nominal size DNTemperature rangePosition of installationPressure rating PNFlow velocities (min. / max.)Case of applicationType of flow medium / analysisCharacteristic curve of the plantPlease contact us. We will be glad to advise you.

    nominal size Dn

    face-to-face dim. l(En558-

    basic line 14) mm

    weightapprox..

    kg

    Flange outside diameter Dmm

    locking (Hub) mm

    Pn10/16 Pn 10 Pn 16 Pn 25 Pn 40DN 80 180 14 200 200 200 19

    DN 100 190 19 220 235 235 20DN 125 200 27 250 270 270 23DN 150 210 32 285 300 300 32DN 200 230 50 340 340 360 375 35DN 250 250 70 400 400 425 450 43DN 300 270 97 455 455 485 515 49DN 350 290 135 505 520 39DN 400 310 165 565 580 44DN 500 350 275 670 715 56DN 600 390 480 780 840 71

    Hydraulic characteristic curves

    kv-v

    alue

    (m3 /h

    )

    Flow velocity (m/s)

    = ( DN2 )2 DN ... mm78,57 kv

    kv-v

    alue

    (m3 /h

    )

    Flow velocity (m/s)

    = ( DN2 )2 DN ... mm78,57 kv

    00 1 2 3 4

    500

    1000

    1500

    2000

    2500

    3000

    3500

    4000

    4500

    5000

    DN 300

    DN 250

    DN 200

    DN 150

    DN 125DN 100DN 80

    00

    2500

    5000

    7500

    10000

    12500

    15000

    1 2 3

    DN 600

    DN 500

    DN 400

    DN 350

  • 4 ERHARD non slam nozzle check valve

    0,1

    1

    100

    10

    0

    100

    70

    50

    40

    60

    90

    80

    30

    20

    10

    0 1 2 3 4 5

    0,1

    1

    100

    10

    0

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    0 1 2 3 4 5

    0,1

    1

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    0

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    0 1 2 3 4 50,1

    1

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    0

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    0 1 2 3 4 5

    0,1

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    0 1 2 3 4 5

    Flow velocity (m/s)

    Flow velocity (m/s)

    Flow velocity (m/s) Flow velocity (m/s)

    Flow velocity (m/s)

    Flow velocity (m/s)

    DN 80 PN 40, Zeta-value at 5 m / s: 0,85

    DN 125 PN 40, Zeta-value at 5 m / s: 0,69

    DN 200 PN 10 / 16, Zeta-value at 5 m / s: 0,51 DN 250 PN 10 / 16, Zeta-value at 5 m / s: 0,69

    DN 100 PN 40, Zeta-value at 5 m / s: 0,63

    DN 150 PN 10 / 16, Zeta-value at 5 m / s: 0,48

    -va

    lue

    [-]

    -va

    lue

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    -va

    lue

    [-]

    -va

    lue

    [-]

    -va

    lue

    [-]

    -va

    lue

    [-]

    Pres

    sure

    loss

    [mba

    r]Pr

    essu

    re lo

    ss [m

    bar]

    Pres

    sure

    loss

    [mba

    r]

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    sure

    loss

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    essu

    re lo

    ss [m

    bar]

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    sure

    loss

    [mba

    r]

    zETA-vAluEs

    Diagrams valid for cavitation free operation.

  • 5 ERHARD non slam nozzle check valve

    Zeta-value with increasing speed

    Zeta-value with decreasing speed

    Pressure loss Dp

    0,1

    1

    100

    10

    0

    100

    70

    50

    40

    60

    90

    80

    30

    20

    10

    0 1 2 3 4 5

    0,01

    0,1

    1

    1000

    100

    10

    0

    140

    120

    80

    60

    100

    40

    20

    0 1 2 3 4

    0,01

    0,1

    1

    1000

    100

    10

    0

    100

    80

    60

    90

    40

    20

    10

    30

    50

    70

    0 1 2 3 4

    0,01

    0,1

    1

    1000

    100

    10

    0

    180

    120

    80

    60

    100

    160

    140

    40

    20

    0 1 2 3 4

    0,01

    0,1

    1

    1000

    100

    10

    0

    120

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    60

    100

    40

    20

    0 1 2 3 4

    Flow velocity (m/s)

    Flow velocity (m/s)

    Flow velocity (m/s)

    Flow velocity (m/s)

    Flow velocity (m/s)

    DN 300 PN 10 / 16, Zeta-value at 5 m / s: 0,74

    DN 400 PN 10 / 16

    DN 600 PN 10 / 16

    DN 350 PN 10 / 16

    DN 500 PN 10 / 16

    -va

    lue

    [-]

    -va

    lue

    [-]

    -va

    lue

    [-]

    -va

    lue

    [-]

    -va

    lue

    [-]

    Pres

    sure

    loss

    [mba

    r]Pr

    essu

    re lo

    ss [m

    bar]

    Pres

    sure

    loss

    [mba

    r]

    Pres

    sure

    loss

    [mba

    r]Pr

    essu

    re lo

    ss [m

    bar]

    zETA-vAluEs

    Diagrams valid for cavitation free operation.

  • Note: Specifications may be changed without notification at any time.Copyright: No copying without express written permission of ERHARDERHARD is a Registered Trademark. 46249 EN (11/15)

    TALIS is the undisputed Number One for water transport and water flow control. TALIS has the best solutions availa-ble in the fields of water and energy management as well as for industrial and communal applications. We have nu-merous products for comprehensive solutions for the whole water cycle from hydrants, butterfly valves and knife gate valves through to needle valves. Our experience, innovative technology, glo-bal expertise and individual consultation processes form the basis for developing long-term solutions for the efficient treatment of the vitally important resource water.

    www.talis-group.com

    ERHARD GmbH & co. kGPostfach 1280D-89502 HeidenheimMeeboldstrasse 22D-89522 HeidenheimPHonE +49 7321 320-0FAx +49 7321 320-491E-mAil info@erhard.deinTERnET www.erhard.de