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Installation method of duckbill valve

  • Release time: 02-19
  • Number of visits: 197 times
  • Column: Company news
  • Editor: Zixuan
Introduction: Duckbill valve is also called back pressure flexible check valve, rubber check valve, rubber blowdown check valve, etc. duckbill valve is made of natural rubber. There are no redundant mechanical components in production and use, and there is no noise, fault and maintenance free during startup. With small opening pressure, 1 cm water head can be opened, and generally, the head loss part may be reduced to a minimum The medium used is weak acid-base and sewage.

   Duckbill valve It is also called back pressure flexible check valve, rubber flexible check valve, duck beak type flexible check valve, etc, Duckbill valve Using all natural rubber, there is no redundant mechanical components in production and use, no mechanical transmission intervention during startup, no noise, no fault, no maintenance; the opening pressure is small, 1 cm water head can be opened, under normal circumstances, the head loss part may be reduced to a minimum degree, and the medium used is weak acid and alkali and sewage. It is widely used for the discharge of flood water and waste water of coast, beach and wharf, and the sewage of coastal city. It has good antifreeze performance and can be used in alpine areas. It is a green valve. Rubber drain check valve : for sewage system: Rubber drain check valve It can prevent flood and sewage from flowing into underground water channel and basement, and avoid heavy loss. Duckbill valve: odor barrier: installed in the pipeline: Rubber blowdown check valve can prevent the odor diffusion of sewage or odorous fluid, and can drain water at any time.  

1、 Installation method

1. The installation site must have a unified planning and command before installation, and do not operate at will; strictly following the installation and operation instructions and the relevant technical data of duckbill valve is an important guarantee to obtain good performance of duckbill valve, and also an early guarantee for us to provide you with good service.

2. Try to determine the valve structure and installation conditions before the valve is installed, so as to prevent the valve from being used accidentally.

3. When the duckbill valve moves, it should follow the vertical movement. If you need to use the cable, please put the cable in the middle of the duckbill valve. During the installation and hoisting of duckbill valve, multi-point hoisting is also required, instead of single point lifting; for installation of duckbill valve above DN 1200, there should be wood strut inside to prevent deformation and scratch of duckbill valve; meanwhile, the center of gravity on both sides should be balanced. A and the lifting method are shown in the figure

4. After the installation of duckbill valve, the vertical line of the valve should be vertical, and the upper angle should be 15-20 mm or 1-2 degrees inward than the lower angle. As shown in Figure B Flange duckbill valve Installation method, the installation of clamp type (sleeve type) duckbill valve shall also comply with this requirement.  

5. When installing duckbill valves above DN800 (including DN800), supporting devices (or hoisting structures) to prevent sagging shall be provided, as shown in Fig. B. Moreover, after the installation of duckbill valve, the bottom of duckbill valve should not contact with the installation plane, which should be at least 50cm higher than the installation plane, so as to ensure the suspension of duckbill valve.  

6. When installing the duckbill valve with the size of more than DN 1400 (including DN 1400), the end of the installation pipe should be equipped with appropriate metal reinforcing frame device. In the application of excessive external back pressure of duckbill valve, appropriate metal reinforcing frame device should also be added.  

2

1. During the loading and unloading of duckbill valve with size of more than DN 1800 (including DN 1800), the foot ring fixed on the lower clamp or flange of duckbill valve shall be used for lifting or lowering. The lifting foot ring shall not be used for moving duckbill valve.

2. It is strictly forbidden to cut the surface with sharp tools during loading and unloading, transportation and installation.  

3. The valve is strictly forbidden to contact with engine oil and strong radiation light.

4. It is strictly prohibited to cover the duck mouth when exposed to the sun.

5. During the trial run of duckbill valve, or when the pump is stopped during operation, there shall be no negative pressure inside the pipe where duckbill valve is installed.

6. Regular inspection of the support and lifting device of duckbill valve is an important means to ensure the performance of duckbill valve. The lifting duckbill valve without support must be installed with relevant devices.

7. Regularly check the trash removal grid upstream of duckbill valve to prevent the performance degradation of the trash removal grid, resulting in excessive floating or sediment in the duckbill valve, which may affect the performance of the valve.  

8. During the installation of the project, the lifting feet must be removed before the duckbill valve falls down (when the large-diameter duckbill valve is placed, there are lifting feet at the bottom)

Duckbill valve is also called back pressure type flexible check valve, rubber flexible check valve, duckbill type flexible check valve, etc. the duckbill valve adopts all natural rubber, and there is no redundant mechanical components in production and use, and there is no mechanical transmission intervention during startup. The duckbill valve produced by Shanghai Luoying can realize the function of positive outflow and reverse check of sewage, and the product quality meets the ~ standard.

Products with high sales volume

 Square duckbill valve

Square duckbill valve

The square mouth can effectively prevent the invasion of sea water and sediment. seawater
 Built in duckbill valve

Built in duckbill valve

Built in machine, system and drain valve
 Clamp type duckbill valve

Clamp type duckbill valve

The clamp type duckbill valve is a special structure, which has a "duckbill" shape and a "positive" shape

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