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Duck billed check valves are generally made of natural rubber or chloroprene rubber and artificial fibers through special processing. Because its shape resembles a duckbill and the front end is flat, it is called a duckbill check valve. Classification of duckbill check valves: According to the connection method, they are generally divided into flange type duckbill valves and clamp type duckbill valves; According to material, it can be divided into natural rubber duckbill valves and chloroprene rubber duckbill valves.
1. Automatically open and close according to the water pressure difference, safe and reliable.
2. The positive opening has low water resistance, low starting pressure, and the flow rate is automatically adjusted according to the water pressure.
3. The reverse check has good sealing performance, no leakage, and prevents backflow. The greater the back pressure, the better the effect.
4. Anti corrosion, anti-aging, strong adaptability, and long service life.
Main data of duckbill check valve | ||||
| Pipe Size ID | Length | Height | Flange Outside Diameter | |
| DN(mm) | NPS | L(mm) | H | A |
| 50 | 2 | 150 | 100 | 150 |
| 80 | 3 | 220 | 140 | 200 |
| 100 | 4 | 250 | 200 | 225 |
| 150 | 6 | 340 | 265 | 275 |
| 200 | 8 | 420 | 325 | 338 |
| 250 | 10 | 520 | 425 | 400 |
| 300 | 12 | 620 | 525 | 485 |
| 350 | 14 | 700 | 625 | 525 |
| 400 | 16 | 800 | 725 | 588 |
| 450 | 18 | 900 | 825 | 625 |
| 500 | 20 | 980 | 925 | 688 |
| 600 | 24 | 1120 | 1025 | 800 |
| 700 | 28 | 1180 | 1125 | 969 |
| 800 | 32 | 1350 | 1400 | 1080 |
| 900 | 36 | 1500 | 1525 | 1150 |
| 1000 | 40 | 1600 | 1725 | 1325 |
| 1200 | 48 | 1840 | 1950 | 1485 |
Note: for duckbill check valve, if there are other standard requirements or special flange needs to be customized, please provide written drawings, standards and information, we can customize duckbill check valve for you.
1.Factory price
2.20 years of manufacturing experience, 7 years of export experience
3.Strict quality inspection, the quality far exceeds the industry standard.
4.Mold a variety of specifications, support customization, OEM
5.Provide free samples
6.Large inventory
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The main feature of a duckbill check valve is that the flange and duckbill one-way valve are integrated, making installation very convenient. It adopts an all rubber design, which will not cause blockage and jamming, reduce maintenance costs, and enable solid particles to pass smoothly. Therefore, the main application scope of duckbill check valves is: waterproof systems, drainage systems, pump outlets, lifting pump stations, submerged aeration systems.


Q1: What is rubber material?
A1: EPDM, CR, NBR, etc. This depends on the work environment and media.
Q2: Is the flange galvanized?
A2: Yes, we have electronic galvanized and hot-dip galvanized flanges. We also have painted flanges.
Q4: What is the minimum order quantity?
A4: 1 piece, you can also use it as a sample to test the quality of our product, and then you can order from us.
Q3: Can I customize the logo?
A3: Yes, we can provide OEM and ODM services for you.
Q4: Can you provide drawings?
A4: Yes, we can provide you with the drawings of the duckbill check valve. Please contact us to obtain the drawings of the duckbill check valve.
Q5: Can we get the sample?
A5: Yes, we can provide you with samples to test the quality of our products.
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