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Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade

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Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade

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Brand Name : Lianghe

Model Number : XH41

Certification : ISO 9001:2015

Place of Origin : China

MOQ : 1 Set

Price : $12.9-$38.9 per set

Payment Terms : T/T, D/A, D/P, Western Union, MoneyGram, L/C

Supply Ability : 1200 per sets

Delivery Time : 5-10 work days

Packaging Details : Inside: Plastic Film ,Outside: Wooden Case

Product name : Flange rubber duckbill check valve

Size : DN32-DN2000

Material of body : NR, EPDM, NBR

Material of flange : Carbon steel, stainless steel,ductile iron steel

Pressure : (PN)0.6~1.6

Media : Water, flood, sewage, acid, alkali

Function : Prevent Backflow

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Marine flange duckbill valve seawater corrosion resistant 0.1Bar low pressure start-up export-grade quality assurance

A flange duckbill check valve is a type of check valve that features a unique, flexible, and non-mechanical design, resembling a duck's bill. The "flange" in its name refers to its connection type, meaning it's designed to be bolted between two flanges in a pipeline system.

What it is the flange duckbill check valve?

Design: The core of a duckbill check valve is a one-piece, flexible elastomeric body, typically made from rubber (like Neoprene, EPDM, Natural Rubber, Buna-N, Viton, etc.). This sleeve is shaped like a duck's bill at one end, forming a slit that acts as the valve's opening and closing mechanism.

Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade

How does flange duckbill check valve work:


Passive Operation: It's a completely passive device, meaning it requires no external power source (electricity, air, etc.) or manual intervention to operate. It relies entirely on the fluid pressure differential.


Forward Flow (Opening): When there is sufficient forward pressure from the fluid in the pipeline, it pushes against the "bill" of the valve. This pressure causes the flexible lips of the duckbill to open or "flex" apart, allowing the fluid to flow through. As the pressure or flow rate increases, the opening widens, minimizing head loss.

Backflow Prevention (Closing): When the forward flow stops or reverse pressure (backpressure) occurs, the pressure on the outside of the duckbill (or the lack of forward pressure) causes the flexible lips to squeeze tightly together. This effectively seals the valve, preventing any backflow of fluid. The greater the backpressure, the tighter the seal.

Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade

Flanged duckbill valve connection data

Model

Pipe Nominal

Diameter

Length(mm) High(mm)

Flange outside

diameter(mm)

XH4150-150-F 50 150 100 150
XH4180-220-F 80 220 140 200
XH41100-250-F 100 250 200 225
XH41150-340-F 150 340 265 275
XH41200-420-F 200 420 325 338
XH41250-520-F 250 520 425 400
XH41300-620-F 300 620 525 485
XH41350-700-F 350 700 625 525
XH41400-800-F 400 800 725 588
XH41450-900-F 450 900 825 625
XH41500-980-F 500 980 925 688
XH41600-1120-F 600 1120 1025 800
XH41700-1180-F 700 1180 1125 969
XH41800-1350-F 800 1350 1400 1080
XH41900-1500-F 900 1500 1525 1150
XH411000-1600-F 1000 1600 1725 1350
XH411200-1840-F 1200 1840 1950 1485

Flange type duckbill valve assembled and shipped

Uzbekistan customers ordered a batch of DN300 PN10 stainless steel flange duckbill valves for use at the seaside

Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade

Flanged duckbill check valves are widely used in demanding environments where reliable backflow prevention is critical, especially in:

Wastewater Treatment Plants and Sewage Systems: Preventing backflow in sewers, sludge lines, and effluent discharge.


Stormwater Outfall Systems: Managing stormwater discharge into rivers, lakes, or the ocean, preventing tidal or river backflow into drainage systems.

Flood Control: In flood mitigation systems, pump stations, and drainage systems for airports, roads, and shopping centers.


Submerged Outfall Diffusers: Ensuring one-way flow in underwater discharge pipes.

Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade


Product Tags:

EPDM duckbill valve

      

0.1Bar low pressure duckbill valve

      

seawater corrosion resistant duckbill valve

      
China Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade wholesale

Marine Flange Duckbill Valve Seawater Corrosion Resistant 0.1Bar Low Pressure Start-up Export Grade Images

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