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  4. JD745X multifunctional pump control valv
  • JD745X multifunctional pump control valve
  • JD745X multifunctional pump control valve
  • JD745X multifunctional pump control valve
  • JD745X multifunctional pump control valve
JD745X multifunctional pump control valveJD745X multifunctional pump control valveJD745X multifunctional pump control valveJD745X multifunctional pump control valve

JD745X multifunctional pump control valve

  • Product Item:JD745X
  • Design specification: JB/T10674
  • Structure length: JB/T10674, GB/T 12221
  • Connecting flange: GB/T9113, HG/T20592, HG/T20615, JB/T 79
  • Pressure temperature: GB/T 17241.7, GB/T12224
  • JD745X multifunctional pump control valve,pump control valve
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    Description

    JD745X multi-function pump control valve

    Overview

    JD745X multi-function pump control valve is composed of main valve, regulating valve and nozzle system. The valve body adopts direct-flow valve body. The main valve control chamber is a diaphragm or piston type double control chamber structure. The control chamber is one more than the general hydraulic control valve. The control function of the main valve is increased, and the slow opening of the pump outlet is realized. Full open, slow close, cut-off and other multi-functional control, to achieve a valve, one-time regulation of the pump outlet multi-functional control.

    The nozzle system of this product is controlled by a regulating valve. By setting the opening of the regulating valve, the required control parameters, such as the opening speed of the main valve, the slow closing speed and so on, can be easily realized.

    Working principle

    When the pump starts, the water pressure acts on the lower chamber of the main valve disc and the control chamber. This pressure opens the main valve. The water in the upper chamber of the control chamber is slowly discharged to the outlet through the control valve B, and the main valve opens slowly. Setting the opening of the regulating valve can get the opening speed of the suitable main valve. When the pump stops working, the inlet water pressure drops rapidly and closes most of the opening quickly under the self-weight and spring pressure, which prevents the remaining opening from slowly closing under the combined action of the water pressure in the upper chamber and the water pressure in the lower chamber.

    Setting the opening and opening ratio of the regulating valve A and B can get the proper valve opening and closing speed.

    Work characteristics

    1. Prevent the water hammer effect is good, will slow open, check the speed of closure, slow shut and other elimination of water hammer technology integration, to prevent the pump does not start hammer and stop the pump backflow and water hammer on the water supply pipeline and pump damage.

    2. Easy operation, no need to distribute another control system for the valve, the valve with the pump to open and stop automatically and in order to complete the control function. Proper control parameters can be obtained by setting control valve opening.

    3, the valve body uses a full channel, DC, streamlined design. The hydraulic loss is small and the energy saving effect is good.

    Functions and uses

    The valve is installed at the outlet end of the pump, and the functions of slow opening, full opening, quick closing and slow closing are realized sequentially.

    This product is used in high-rise building water supply system and other water supply system pump outlet pipeline to prevent and weaken the water hammer water hammer when the pump is opened and closed, prevent water backflow to protect the pump, maintain pipeline safety.

    Main technical parameters

    Nominal Pressure
    (MPa)
    Shell Test
    (MPa)
    Sealing Test
    (MPa)
    Fluids Fluids Temp
    (°C)
    1.0 1.5 1.1 Water 0-80
    1.6 2.4 1.76
    2.5 3.75 2.75


    Dimensions


    DN L D D1 n-d H
    1.0MPa 1.6 (MPa 2.5 MPa 1.0MPa 1.6 MPa 2.5 MPa 1.0MPa 1.6 MPa 2.5 MPa
    50 205 165 165 165 125 125 125 4-18 4-18 4-18 293
    65 216 185 185 185 145 145 145 4-18 4-18 8-18 328
    80 250 200 200 200 160 160 160 8-18 8-18 8-18 364
    100 320 220 220 235 180 180 190 8-18 8-18 8-22 418
    125 365 250 250 270 210 210 220 8-18 8-18 8-22 481
    150 415 285 285 300 240 240 250 8-22 8-22 8-26 543
    200 500 340 340 360 295 295 310 8-22 12-22 12-26 673
    250 605 395 405 425 350 355 370 12-22 12-26 12-26 792
    300 698 445 460 485 400 410 430 12-22 12-26 12-30 927
    350 787 505 520 555 460 470 490 16-22 16-26 16-30 957
    400 914 565 580 620 515 525 550 16-26 16-30 16-33 1188
    450 978 615 640 670 565 585 600 20-26 20-30 16-36 1218
    500 978 670 715 730 620 650 660 20-26 20-33 20-36 1256
    600 1150 780 840 845 725 770 770 20-30 20-36 20-39 1600
    700 1300 895 910 960 840 840 875 2430 24-36 24-42 1750
    800 1450 1015 1025 1085 950 950 990 2433 24-39 24-48 1900

    Installation

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