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duckbill check valve

  • Product Name:  duckbill check valve
  • Product Details:  duckbill check valve

Duckbill Check Valve
Duckbill check valves are widely used in the demanding applications of many industries, are precision-molded, one-piece elastomeric valves that provide reliable backflow prevention at low pressure differentials.  Duckbill check valves allow free flow with positive differential pressure.  With negative differential pressure, backflow is checked.  Pressure drop across the valve is a feature unique to duckbill check valves.  They can be designed to operate in a few millimeters (inches) of water to several hundred KPa (psi), depending on valve size, geometry and compound characteristics.  Duckbill check valves are also designed to start functioning at specific opening and closing pressure ranges, depending on your specifications.

Features and Benefit
·Reliable backflow prevention
·100% elastomeric construction eliminates maintenance forged gate valves
·Will not corrode, warp bronze gate valve or freeze open or shut
·1”-2” Cracking Pressure, Low Head loss
·Curved Bill enhances sealing around debris
·Custom built for each application based on pressure and flow conditions
·Available in diameters from 1/2" (12mm) to 96” (2400mm)

Slip On Duckbill Valves


The duckbill valve slip on type is a slip-on design with an integral nylon reinforced rubber sleeve, and furnished with heavy-duty clamps. The Valve can be easily installed over the pipe end. Normally, GYLDT manufactures Slip On duckbill valves from DN50mm to DN2400mm, but we can supply the valves with any dimensions to meet your needs.


Flange Duckbill Valves


The Duckbill Valve Flanged Type is manufactured with a nylon reinforced rubber flange design, and furnished with galvanized carbon steel or stainless steel 304/316 retaining ring flange. The valves can be installed directly to the pipe flanges. Normally, GYLDT manufactures flanged type duckbill valves from DN150mm to DN2400mm, but we can supply the valves with any dimensions to meet your needs. .


Housed Duckbill Valves



The Duckbill Valve Series Housed Type is manufactured exactly the same as Flanged Type in rubber valve body, but finished with a carbon steel shell, which makes the Series Housed duckbill valve a part of the pipe line. The Valves can be installed easily between the pipes with flanges. Normally, GYLDT manufactures Housed duckbill valves from DN150mm to DN1200mm.


Flanged in-line Duckbill Valves



The Flanged Duckbill Valve in-line Type is manufactured with a nylon reinforced rubber flange design, which is used to be bolted between the pipe flanges, and the valves can act as part of the pipe line, no need for spare space. Normally, GYLDT manufactures in-line Type duckbill valves from DN50mm to DN1800mm.


Slip in-line Duckbill Valves



The series Duckbill Valve Slip In is a similar shape as series Duckbill Valve Slip On, but is a slip-in design. It is special manufactured for application where there is no flange joint, can be easily inserted the pipe. And the valves can act as part of the pipe line, no need for spare space. Normally, GYLDT manufactures Slip In type duckbill valves from DN50mm to DN1800mm.


Customized Duckbill Valves



The series Customized Duckbill Valves are provided for customers' special requirements, we can manufacture duckbill valves as per different shape with different rubber, and the connection will as per request for special location and application. But GYLDT makes Customized Duckbill Valves no stock in inventory, we produce as per requirement.
Contact GYLDT for more information when you design for a drainage system.


Slip on Type Data Sheet:


SIZE
VALVE DIMENSIONS
Standard Dimensions for Clamp
I.D.
OD(mm)
F/F(mm)
W(mm)
Weight(kg)
φ(mm)
PCS
Bolt Diameter×Length (mm)
w(mm)
Weight(kg)
(mm)
150
159
270
247
1.8 
183
2
12×50
25
0.6 
200
219
340
306
5.4 
246
2
12×50
25
0.7 
250
273
416
380
7.2 
300
2
12×60
25
0.9 
300
325
484
480
12.2 
360
2
12×70
30
1.1 
350
377
534
540
20.2 
420
2
12×70
30
1.3 
400
426
630
605
26.4 
480
2
14×80
30
1.5 
450
480
670
645
28.8 
530
2
14×80
35
1.7 
500
530
737
750
34.4 
580
2
14×80
40
2.3 
600
630
862
880
67.6 
680
2
14×90
40
2.6 
700
720
932
950
83.0 
780
4
16×100
40
3.0 
800
820
1060
1220
127.0 
890
4
16×100
40
3.8 
900
920
1115
1320
155.0 
1000
4
16×100
45
4.2 
1000
1020
1260
1430
173.0 
1100
4
16×100
45
5.0 
1200
1220
1490
1620
252.0 
1300
4
16×110
50
6.0 
1400
1420
1562
1960
330.0 
1500
4
18×120
50
10.3 
1500
1520
1557
2060
410.0 
1600
4
18×120
55
11.2 
1600
1620
1670
2140
523.0 
1700
4
18×120
55
12.0 
1800
1820
1975
2700
613.0 
1900
4
18×120
60
15.4 
2000
2020
2115
2860
765.0 
2100
4
22×120
60
17.0 
2200
2220
2542
3500
820.0 
2330
4
27×200
60
37.4 
2400
2420
3121
3838
942.0 
2540
4
27×200
60
40.8 

Note:
1. The inner diameters are matched to the pipe outer diameter on which installed.
2. The weight is approximate.
3. The dimensions are not integrated in the above table, contact Liangda for more information.
4. We can make duckbill valves with any inner diameters upon request.
5. PCS are the number of half part of the clamps
6. The usual material of the clamp is stainless steel 304, other material availble upon request.
7. Duckbill valves of dimensions in the above table are available in inventory. Any other dimensions and designs available upon request