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Products Flange duckbill valve

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Flange duckbill valve

The flange duckbill valve can effectively prevent the invasion of sea water and sediment. Due to the difference between the discharge speed of the sewage diffuser and that of the traditional water diffuser, when the density of the water jet is lower than that of the traditional diffuser, there will be a certain difference between the discharge rate of the sewage diffuser and that of the seawater diffuser

Product alias: Flange duckbill valve
Product specification:【 DN32mm-DN1800mm】
Connection mode: flange
Product certification: ISO9001-2008
Scope of application:【 Acid, alkali, corrosion, oil, hot water, cold water, etc.]

  • Product introduction
  • Product advantages
  • Product diagram
  • technical parameter
  • Ordering instructions

    Flange type Duckbill valve It can effectively prevent the invasion of sea water and sediment. There is a certain density difference between seawater and discharged sewage. When the sewage discharge is small, the traditional outlet diffuser will cause seawater intrusion into the diffuser due to the decrease of jet velocity at the nozzle, and the sediment in the seabed environment will be brought into the diffuser. And the flange type Duckbill valve The outlet is closed when the discharge is zero, and it can maintain a high jet velocity when the discharge is low, so it can prevent the invasion of seawater and environmental sediment.

    The flange duckbill valve can effectively prevent the invasion of sea water and sediment. There is a certain density difference between seawater and discharged sewage. When the sewage discharge is small, the traditional outlet diffuser will cause seawater intrusion into the diffuser due to the decrease of jet velocity at the nozzle, and the sediment in the seabed environment will be brought into the diffuser. The outlet of the flange duckbill valve changes with the change of the discharge rate. When the discharge is zero, it can maintain a high jet velocity under the condition of low discharge, so as to prevent the invasion of sea water and environmental sediment.
    Flange rubber duckbill valve products are mainly used in waterproof system, drainage system, pump outlet, lifting pump station and submerged aeration system. Main features of the product: rubber flange and valve body are connected into one, which is convenient for installation. The valve body adopts full rubber design, which will not cause silting and jamming, reduces the maintenance cost and allows the solid particles to pass through smoothly.
    Flange rubber duckbill valve size standard: Generally speaking, there are two installation sizes in China. One installation dimension is connected with the national standard flange. This is very early when the duckbill valve was designed. In order to match with the national standard, the flange standard of duckbill valve with diameter below 800 was specified. The center distance and outer diameter of flange of 10kg bolt hole in the national standard and the outer diameter of flange were involved in the design of duckbill valve with diameter of more than 800. The other is its own size, which is different from the national standard.
    It is made of rubber flange, valve body and duckbill. It is equipped with gasket metal flange. It can be connected with metal flange naturally. It can be directly installed on tank, pipeline and cofferdam. During installation and connection, the size of flange and connecting flange shall be corresponding to each other to ensure the sealing after the connection is tight, and pay attention not to damage the flange lip of rubber blowdown check valve.
    The rubber flange is connected with the valve body to facilitate installation. The valve body adopts full rubber design, which will not cause silting and jamming, reduces the maintenance cost and allows the solid particles to pass through smoothly.
    1. The flange and pipe assembly of flange duckbill valve shall be checked with tools and methods. The inclination deviation of the cut end face shall not be greater than 1% of the outer diameter of the pipe and shall not exceed 3mm.
    2. When assembling flange and pipe of flange duckbill valve, flange angle square should be used to check the verticality of flange.
    3. The size of flange gasket should be consistent with the size of flange gasket.
    4. The flange of flange duckbill valve shall not be buried in the ground. The flange of buried pipeline or non passing trench pipeline shall be provided with inspection well, and the flange shall not be installed in floor, wall and casing.
    5. The flange connection of flange duckbill valve should be concentric with the pipe, and the bolt should be free to penetrate. The flange bolt holes shall be installed in the middle of the span, and the flanges shall be kept parallel, and the deviation shall not be greater than 1.5/1000 of the flange outer diameter, and shall not be greater than 2 mm. It is not allowed to eliminate the skewness by using the method of tightening the bolts with strength.
    6. The flange connection of flange duckbill valve should use the same specification of bolts, and the installation direction should be consistent. After the bolts are tightened, they should be close to the flange without any fine seam. When a washer is needed, each bolt shall not be more than one, and the tightened bolt should be flush with the nut.
    7. When tightening the bolts, the bolts should be symmetrically crossed to ensure that the stress on the gasket is uniform.  

     Flange duckbill valve

    [product appearance and structural dimensions]
    Connection dimensions of hf41x-fl flange duckbill valve
    Serial number model Nominal diameter of pipe Length (L) Height (H)
    one HF100-240-FL002 one hundred two hundred and forty two hundred
    two HF150-340-FL002 one hundred and fifty three hundred and forty two hundred and sixty-five
    three HF200-420-FL002 two hundred four hundred and twenty three hundred and twenty-five
    four HF250-520-FL002 two hundred and fifty five hundred and twenty four hundred and twenty-five
    five HF300-620-FL002 three hundred six hundred and twenty five hundred and twenty-five
    six HF350-700-FL002 three hundred and fifty seven hundred six hundred and twenty-five
    seven HF400-800-FL002 four hundred eight hundred seven hundred and twenty-five
    eight HF450-900-FL0025 four hundred and fifty nine hundred eighty-two
    nine HF500-980-FL002 five hundred nine hundred and eighty nine hundred and twenty-five
    ten HF600-1060-FL002 six hundred one thousand and sixty one thousand and twenty-five
    eleven HF700-1160-FL002 seven hundred one thousand one hundred and sixty one thousand one hundred and twenty-five
    twelve HF900-1500-FL002 nine hundred one thousand and five hundred one thousand five hundred and twenty-five
    thirteen HF1000-1600-FL002 one thousand one thousand and six hundred one thousand six hundred and twenty-five
    fourteen HF1200-1880-FL002 one thousand and two hundred one thousand eight hundred and eighty one thousand nine hundred and fifty
    fifteen HF1400-1880-FL002 one thousand and four hundred two thousand two thousand three hundred and twenty
    sixteen HF1600-1880-FL002 one thousand and six hundred two thousand and three hundred two thousand six hundred and fifty
    seventeen HF1800-1880-FL002 one thousand and eight hundred two thousand and six hundred two thousand nine hundred and sixty
    eighteen HF2000-1880-FL002 two thousand two thousand and eight hundred three thousand and three hundred
    1. If the customer has special requirements for the product, the following instructions shall be provided in the order contract:
    (1) Structural length
    (2) Connection form
    (3) Nominal diameter, full bore, reduced diameter, pipe size
    (4) Service medium, temperature and pressure range
    (5) Our factory can make and design special products according to the special requirements of customers.
    2. Our factory can configure and design special products according to the special requirements of customers.
    3. If the customer provides the determined product type and model, the customer shall correctly explain the meaning and requirements of the model, and sign the contract under the condition that both parties understand and agree.

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Hu ICP Bei No. 10030623 copyright Shanghai Luoying pipeline equipment Co., Ltd Mirror image must be investigated