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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.

Product alias: Flange duckbill valve
Product specifications:【 DN32mm-DN1800mm】
Connection mode: flange
Product certification: ISO9001-2008
Scope of application:【 Acid, alkali, corrosion, oil, hot water, cold water, etc.]
Product material: ~No pollution, no lead and other toxic substances
Product color: Black, physical color see the commodity display picture

  • Quality stability: the implementation of the whole process of quality monitoring, meticulous, all-round detection!
  • Reasonable price: efficient internal cost control, reduce expenses, and benefit customers!
  • Fast delivery: advanced production line, sufficient stock, shorten the delivery time!
  •  Flange duckbill valve

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Purchase hotline: 021-6221-2627

Product advantages

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 integrated into one, which is very 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.
There are two standard sizes of rubber valve for installation 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 ~ 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. The other installation size is its own size, which is different from ~ 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 ensure absolute sealing after fastening, and the flange lip of rubber blowdown check valve shall not be damaged.
The rubber flange is connected with the valve body, so the installation is very convenient. 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.

Product features

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 flange duckbill valve should be provided with soft gasket when connecting, the peripheral dimension should be neat, and the gasket size should be consistent with the flange sealing surface.
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 bolt diameter of the flange should not be greater than 1.000, and the deviation between the bolts should not be greater than 1.2 mm.
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.

classic case

Shanghai Luoying supplies professional flange duckbill valve to Taicang chemical treatment project

On the afternoon of January 18, the resource utilization and chemical treatment project of kitchen waste in Taicang City of Jiangsu Province officially started.
Taicang kitchen waste resource utilization and ~ chemical treatment project completed the environmental impact assessment, feasibility study, land purchase, project approval by the national development and Reform Commission, stability assessment, energy assessment and safety assessment in 2015. The job assessment has entered the expert review stage, and the general planning scheme has been submitted to the housing and Urban Rural Development Bureau for review. At present, the planning drawings are being submitted for approval and publicity, the construction drawings are reviewed and handled, and the construction units are bidding and signing contracts and receiving electricity Relevant preparations before construction such as water connection. It is expected that the civil work will be completed and put into trial operation by the end of this year.
Shanghai Luoying supplies professional flange duckbill valve to Taicang chemical treatment project. Luoying flange duckbill valve can effectively prevent seawater and sediment invasion. 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.

Product diagram

 Flange duckbill valve

Parts materials

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 Flange duckbill valve

No Part Material
one Body NR, Cr, IIR, NBR, FKM and EPDM
two Flange Cast and forged carbon steel (Q235), stainless steel (201, 304, 316, 321), plastic (CPVC, PVDF, PPH, UPVC, RPP)

technical parameter

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 Flange duckbill valve

Matching pipeline diameter Valve step Pipeline touching (B >)
1/2″~3/4″

fifteen

fifteen

1″~1-1/4″

twenty

twenty

1-1/2~2-1/2 twenty-five

twenty-five

3″ forty

forty

4″

fifty

fifty

6″

fifty

fifty

8″ fifty

fifty

10″ fifty

fifty

12″~14″ one hundred

one hundred

16″~20″

one hundred and fifty

one hundred and fifty

24″~36″

two hundred

two hundred

42″ two hundred and fifty

two hundred and fifty

48″~60″ three hundred

three hundred

72″ four hundred

four hundred

Description: DN800 ~ 1800 (32 ″ ~ 72 ″) double hoops

Product service

Professional manufacturing, professional services, Luoying to create more value for you!
"Continuous improvement of service" is the theme of "continuous improvement of service". Luo Ying strictly in accordance with ISO9001-2000 quality system certification requirements, strict quality control, responsibility to people, to ensure the healthy operation of production, sales and service. To strengthen communication with users, we will wholeheartedly provide customers with high-quality products and perfect services. Hereby, Luo Ying makes the following commitments:

Product standards
The products are designed, manufactured and accepted in strict accordance with Chinese GB, Hg standards and American API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
Pre sales service
Product introduction, technical exchange, non-standard product design, troubleshooting.
Service in sale
1. Keep the contract, ensure timely supply, keep in touch with customers at any time. 2. For special or complex products, our factory arranges technical personnel to train and guide users in the use, troubleshooting, adjustment and maintenance of products.
after-sale service
1. The warranty period of Luoying's products is 12 months from the date of delivery, and the "Three Guarantees" service (return, replacement and repair) is implemented.
2. During the use of the products, our factory regularly organizes technical and inspection personnel to visit and consult users for feedback on product quality, use status and improvement opinions, so as to further improve product quality.
3. After sales service personnel rush to the scene within 24-36 hours (48 hours outside the province).
4. For after-sales service, users are required to fill in the quality feedback form after service, and make appraisal opinions, so as to jointly improve the product quality and service quality of Luoying.

Ordering process and instructions

1. Please fax customer purchase list to 021-64207088 e-mail: Luoying @ luoyingsh.com or call 021-622122627.
2. Receive the customer purchase list, provide the customer with product model selection and quotation (price list).
3. Specific agreement: delivery date, special requirements and other matters.


Ordering instructions
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) 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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contact us

  • Customer service hotline: 021-6221-2627
  • Business QQ: 319992131
  • Fax: 02706488
  • Email: info@luoyingsh.com
  • Company address: Building 10, north side of Songzheng highway, Shihudang Town, Songjiang District, Shanghai
  • Post code: 201201

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