Rubber Duckbill Check Valves

The Rubber Duckbill Check Valves from Chongqing Jeri Marine, are specifically designed for use in sewage treatment plants, outfalls, and tidal operations. They’re a cost-effective solution for controlling back pressures, and are a fully passive flow device, requiring no maintenance, no outside power sources or manual assistance to operate.Rubber Duckbill Check Valves opens by inner pressure difference, and closes by outer pressure. When in the forward work, the tiny water pressure can open the valve, and the pressure is greater, the valve opening is larger. In the reverse working, the valve naturally closes.
The Rubber Duckbill Check Valves are recommended as direct replacements for ineffective, maintenance-ridden flap type check valves, which are commonly known to seize, rust, or bind in unwanted positions. The Rubber Duckbill Check Valves provide backflow protection from occurrences including:
1、Sewage slurries
2、Outfalls to ocean fronts from heavy rainfall activity
3、Land erosion due to back flow conditions
4、Invasion of saltwater to freshwater pond

The Rubber Duckbill check valves are an efficient and economical way to control back pressure from sewage treatment plants, outfalls, and tidal operations, and serve other applications as well. They are extremely tough, and require no maintenance or any assistance to operate, and offer quiet operation and low opening pressure.

The Rubber Duckbill check valves are available in several styles, including Series CPF for flanging directly to pipes, storm water headwalls, and Series CPO for direct clamping. CPI mounts between existing flanges in piping systems, and Series CPJ flanges into systems with a full metal body jacket.

Step up to the quality Rubber Duckbill check valves to replace maintenance problem flap type check valves that may seize, rust, or bind with obstructions.

Product name：Rubber Duckbill check valves

Size：DN32-DN2000

Standard or Nonstandard：Standad

material of flange：Cast steel, carbon steel, stainless ,ductile ironsteel

flange standard:DIN/ANSI/JIS/BS

material of body:NR, EPDM, NBR

Feature:Long Life

Color:Black

pressure(PN)：0.6~1.6

Media:water, flood, sewage, acid, alkali

Temperature of Media:Normal Temperature

Parameter
Type	Nominal dia. of pipe	L for length	H for height	C for external dia. of flange
JR50-150-F	50	150	100	150
JR80-220-F	80	220	140	200
JR100-250-F	100	250	200	225
JR150-340-F	150	340	265	275
JR200-420-F	200	40	325	338
JR250-520-F	250	520	425	400
JR300-620-F	300	620	525	485
JR350-700-F	350	700	625	525
JR400-800-F	400	800	725	588
JR450-900-F	450	900	825	625
JR500-980-F	500	980	925	688
JR600-1120-F	600	1120	1025	800
JR700-1180-F	700	1180	1125	969
JR800-1350-F	800	1350	1400	1080
JR900-1500-F	900	1500	1525	1150
JR1000-1600-F	1000	1600	1725	1325
JR1200-1840-F	1200	1840	1950	1485

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Product Description

1,Rubber Duckbill Check Valves is a new water supply and drainage valve with full rubber structure, duck-mouthed appearance and functions of positive flow-in and reserve cut-off.
2,Rubber Duckbill Check Valves are manufactured with different design mechanism and different rubber products by special processing.
3,At positive operation the water flow inform entrance and the valve will be open at weak hydraulic pressure.
4,The hydraulic pressure is higher, the valve gate will open more greatly and the water flow is greater.
5,At reserve operation, the valve gate closes naturally and seals tightly cut-off valve, the back pressure is higher, the valve gate closes more tightly and the seal effect is better.

Rubber Duckbill Check Valves are used widely in various drainage exits to prevent from pouring backwards and flowing backwards in city planning, water conservancy and sewage disposal etc, it is the ideal product to replace flap valve.

2. Product characteristics:

The advantages are specially marked in comparison with traditional flap valve:

A) Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance.

B) Positive start has little water resistance and start-up pressure and the flow can be adjusted naturally according to hydraulic pressure.

C) Reserve cut-off has good seal without leakage to prevent from flowing backwards. The back pressure is higher and the effect is barrier.

D) Anticorrosion, aging resistance, deformation resistance, strong adaptability and long use life

E) Wide size scope, nominal diameter of DN50-DN3000.

Application scope:

1) Excellent performance and wide application scope

2) Applicable for sewage system

3) Applicable for discharge system

4) Applicable for dyke discharge

5) Applicable for the drainage of airport and freeway

6) Applicable for sewer discharge

7) Applicable for sewage lagoon discharge

8) Smell separation

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