Series RH81 Flanged Duckbill Check Valve
Series RH81 Flanged Duckbill Check Valves are non-return axial water flow valves made of layers fabric and rubber material reinforced. And widely used for large pipe diameter flows with low back pressures, such as sea coast, sand beach, sea port, city release water,etc.
With simple design, one piece rubber construction, which provided a safe and dependable backflow prevention service. The valves have a low opening pressure and is self- draining which eliminates standing water and maximizes storage volume in the upstream pipe.
Series RH81 Flanged Duckbill Check Valves are manufactured of flexible rubber material reinforced with fabric material. Its geometry consists of a shot piece of duckbill-like rubber tube at one end, a round flange typically clamped onto a pipe port at the other, and a saddle shape at the middle.
Features:
1.100% rubber construction.
2. Won’t corrode, warp or freeze open or shut
3. 1’’ opening pressure, low head loss.
4. Low cost both valves and installation.
5. Low maintenance costs
6. Cannot be propped open.
A. Tamper and vandal proof.
B. Children and animals cannot enter.
C. Backflow prevention assured.
7. Zero operating costs, Zero life-cycle costs.
8. Non-slamming, no noise, no vibration.
9. Absolute backflow prevention saves money.
A. Reduces flood liability.
B. Lowers re-treatment costs.
C. Helps to eliminate compliance violations.
D. Reduces beach erosion.
E. Keeps infrastructure form shutting down (Roads, Airports and Businesses).
F. Eliminates complaints from constituents.
10. Rubber construction and less environmental impact from rust and corrosion.
11. Prevents buildup of mussels.
12.Silp-on , flanged, curved bill type or other type is on your request.
Materials of Construction:
EEV Duckbill check valve is available in Nature Rubber, Buna-N, EPDM, Viton. Other materials are available on requests. The shell of duckbill valve actually is sandwich structure which consists of 3 upper layers of rubber and 2lower layers of rubber with 2 layers of fabric reinforcement in the middle. Each rubber layer is 2mm thick, each woven fabric layer is around 1mm thick. So the total thickness of the rubber matrix hosting fabric reinforcement is approximately 12-13mm.
Dimension series RH81 Flanged Duckbill Check Vlaves:
|
Item
|
Size
|
Pipe O.D
|
L(MM)
|
W(MM)
|
Flange OD
|
|
1
|
XL100-F
|
100
|
195
|
170
|
220
|
|
2
|
XL125-F
|
125
|
230
|
190
|
250
|
|
3
|
XL150-F
|
150
|
270
|
230
|
285
|
|
4
|
XL200-F
|
200
|
320
|
310
|
340
|
|
5
|
XL250-F
|
250
|
360
|
380
|
394
|
|
6
|
XL300-F
|
300
|
450
|
460
|
445
|
|
7
|
XL350-F
|
350
|
560
|
540
|
505
|
|
8
|
XL400-F
|
400
|
650
|
620
|
565
|
|
9
|
XL450-F
|
450
|
750
|
700
|
615
|
|
10
|
XL500-F
|
500
|
850
|
780
|
670
|
|
11
|
XL600-F
|
600
|
950
|
940
|
780
|
|
12
|
XL700-F
|
700
|
1060
|
1060
|
890
|
|
13
|
XL800-F
|
800
|
1200
|
1220
|
1015
|
|
14
|
XL900-F
|
900
|
1260
|
1400
|
1115
|
|
15
|
XL1000-F
|
1000
|
1450
|
1550
|
1230
|
|
16
|
XL1200-F
|
1200
|
1720
|
1850
|
1455
|
|
17
|
XL1400-F
|
1400
|
2010
|
2160
|
1675
|
|
18
|
XL1500-F
|
1500
|
2180
|
2380
|
1915
|
|
19
|
XL1600-F
|
1600
|
2280
|
2480
|
2115
|
|
20
|
XL1800-F
|
1800
|
2600
|
2780
|
2325
|
Note:
1.Flanges can be drilled to ANSI, DIN, BS, or any other standards.
2.Custom size is available.
Duckbill Valve
