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Van điện từ, van khí,ZCRB electromagnetic emergency shut-off valve gas emergency shut-off valve DN25 32 40 50 65 80 100
  • Van điện từ, van khí,ZCRB electromagnetic emergency shut-off valve gas emergency shut-off valve DN25 32 40 50 65 80 100

Van điện từ, van khí,ZCRB electromagnetic emergency shut-off valve gas emergency shut-off valve DN25 32 40 50 65 80 100

  • Đăng ngày 14-11-2018 09:43:20 AM - 791 Lượt xem
  • Mã sản phẩm: ZCRB

    • Tình trạng sản phẩm:


    First, the gas emergency shut-off valve - an overview

     
     ZCRB series gas emergency shut-off valve is a new type of safety matching device for gas pipeline engineering, mainly used in the following occasions:
     
    1. Connect to the flammable gas leak monitoring instrument. When the instrument detects the leakage of flammable gas, it automatically closes the main gas supply valve, cuts off the supply of gas, and timely stops the occurrence of a vicious accident.
     
    2. Connect to the limit temperature (or pressure) safety controller of the thermal equipment. When the temperature or pressure of the detection point in the equipment exceeds the set limit value, the air supply valve is automatically closed quickly to stop the supply of fuel.
     
    3. Connect to the central fire alarm system of the high-rise building. When a fire occurs in the building, the gas supply in the building is automatically cut off to prevent the gas explosion.
     
    4. Set BZCK gas emergency shut-off valve in the gas supply pipe network of the city or factory, which can be centrally controlled in the central control room, remotely remotely controlled, and emergencyly shut down the pipeline at the accident site.
     
    This series of products has excellent technical performance, low load loss and high reliability. It is suitable for flammable gases such as gas, natural gas and liquefied petroleum gas. It is widely used in gas supply pipe network systems, gas heat plant workshops, gas boiler rooms and residential facilities.

    Second, the valve function and working principle 

    This series of valves is a normally open pulse-trigger type solenoid valve with accident self-locking and manual reset function.
    1. The valve is in the normally open state during daily work, and the solenoid valve coil is in a power-off state and does not consume electrical energy.
    2. When the accident occurs, the valve coil is energized instantaneously, triggering the valve to close quickly and enter the self-locking state. At this time, even if the power is removed, the valve is still in the self-locking closed state and will not automatically re-open.
    3. This valve adopts pilot-operated valve flap, which is easy to open. Even if the pressure reaches 6bar, it is very easy to open. The diameter is larger than DN125. The lever handle is used to make the valve reach the target switch with low effort and speed.
    4. When the staff handles the accident and manually restarts the valve, the gas supply will be resumed.
    A normally closed emergency shut-off valve with a power-off shut-off is also available upon request.

    Third, the gas emergency shut-off valve - technical parameters:
     
    1. Applicable to gas, natural gas and liquefied petroleum gas.
     
    2, valve specifications: threaded connection G1/2 ", G3 / 4", G1 "; flange connection DN25 ~ 350
     
    3, working pressure: 0.5bar ~ 6bar
     
    4, electrical protection level: CEI IP65/IP67
     
    5, explosion-proof grade: Eexm II T4 / Eexm II T5
     
    6, working voltage and electric power: AC AC220V, 50Hz/14V; DC DC12V/8.5W, DC24V/8.5W
     
    7, operating coefficient: uninterrupted output or pulse type
     
    8, electrical connection: plug-in (regardless of positive and negative)
     
    9, coil power: ≤ DN100, AC AC 220V at 20 ° C, 50Hz / 24VA DC DC24V, / 24W coil model: MF-1 (2 ≥ DN100, AC AC220V at 20 ° C, 50Hz / 90VA DC DC24V, / 85W coil model: ZCLF-1(2)
     
    10, working environment temperature: -15 ~ 60 ° C
     
    11, sealing material: NBR rubber
     
    12, valve body material: brass, stainless steel, carbon steel
     
    13, valve closing time: less than 1 second

    Fourth, the manual reset operation process

     
    When the valve is cut off and the pipeline leak is removed, the staff needs to manually pull up the manual reset lever when the manual reset is required. When the “click” is heard, the valve is completely opened.At this time, even if you release your hand, it will not be cut off. (unless the valve coil is energized again).
     
    Note: Manual reset must be operated when the solenoid valve coil is de-energized.
     

    Five, gas emergency shut-off valve - performance specifications:

    Pressure Level
    Normal temperature test pressure
    case
    seal
    Low pressure seal
    Nominal pressure (MPa)
    1.6
    2.4
    1.76
    0.6
    2.5
    3.75
    2.75
    0.6
    4.0
    6.0
    4.4
    0.6
    proper temperature
    -15~60°C
     

    Sixth, gas emergency shut-off valve - main parts and materials:

    Part Name
    material
    "-1 thread"
    DN25-DN350 (flange)
    Valve body
    brass
    Carbon steel (stainless steel)
    Self-locking body
    Brass (aluminum alloy)
    Valve stem
    stainless steel
    stainless steel
    Sealed river
    NBR rubber
     
     

    Seven, gas emergency shut-off valve - specifications and installation size table

    Specification (DN)
    L
    H
    D
    D1
    D2
    Z-¤d
    Remarks
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
     
    25
    160
    180
    115
    85
    65
    4-¤14
    Flange connection
    32
    180
    200
    135
    100
    78
    4-¤18
    40
    200
    200
    145
    110
    85
    4-¤18
    50
    230
    220
    160
    125
    100
    4-¤18
    65
    290
    255
    180
    145
    120
    4-¤18
    80
    310
    320
    195
    160
    135
    8-¤18
    100
    350
    380
    215
    180
    155
    8-¤18
    125
    400
    405
    245
    210
    185
    8-¤23
    150
    480
    458
    280
    240
    210
    8-¤23
    200
    600
    530
    335
    295
    265
    8-¤23
    250
    650
    600
    390
    350
    320
    12-¤23
    300
    750
    650
    440
    400
    368
    12-¤23
    350
    850
    750
    500
    460
    428
    12-¤23
         

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