Duckbill Check Valve

Duckbill check valves, 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.

•normally open one-way check valves
•prevents backflow leakage when minimal backpressure is applied
•can be installed easily into hole and sealed by compressing flange


Duckbill check valve features:

Reliable backflow prevention
100% elastomeric construction eliminates maintenance
Will not corrode, warp 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)

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 dimensions rubber flange available as per requirement.
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.



Plastic bags , wooden box , or as requested

Item: rubber check valve
Type: duckbill
Material: fluorosilicone
Hardness: 55±5 shorea
Inner diameter: 5.72mm
Outer diameter: 11.15mm
Opening pressure: 0-1kpa
Color: red/black
Sample: 2 pieces free samples

Item: rubber duckbill check valve
Material: nbr/epdm/fkm/silicone/fvmq
Hardness:55¡¨¤5 shorea
Opening pressure: 0-3kpa
Type: duckbill
Color: red/black/white/clear





Poly bag, carton( 5 types dimensions )

Material: silicone/epdm/fvmoq/nbr and so on
Raw material brand: momentive, dupont, shinetsu, wacker, lanxess
Material standard: astm d2000, sae j200, jis and so on
Size : according to your requirements.
Products function: accurate flow control. Controling the fluid flow to one direction, at the same time , prevent fluid to flow in the opposite direction.
Mold style: compression, injection, extrusion, lsr injection
Application: be suitable for auto industry, medical equipment, household appliances, and liquid
Distributor, vacuum pressure pump, liquid soap dispatcher, and so on
Lead time: according to clients' requirements
Package: pe bag+outer carton or according to clients' requirements

1, Product Information:
All ZHW Series F80 rubber check valves are available in a wide selection of back pressure capabilities and elastomers, including GB certified material. Because of the wide array of available configurations, there?s sure to be a ZHW Series F80 valve to suit your application.
ZHW Series F80 rubber check valves won?t freeze or deform, and they function solely on the inlet and back pressure which are present in each unique situation.
Each rubber check valve is designed by some of the most experienced rubber technicians in the industry, and are carefully constructed using the finest engineered materials available. All of our Series F80 valves are precisely manufactured to ensure proper operation, and will provide years of unhindered, trouble-free service.


2, Product Applications:
1). Sewage systems
2). Stormwater outfall
3). Drainage systems
4). Flood control systems
5). Drainage from dams
6). Pumping stations / wet wells
7). Drainages in airports and highways
8). CSO / SSO / Effluent discharge
9) Drainages in sewers
10). Submerged outfall diffuser nozzles
11). Drainage from sewage reservoirs
12). Coarse bubble air diffusers, Sparging nozzles

3, Product Features:
All-rubber construction to resist abrasive slurries
ISO standard construction
Ultra-quiet operation, with no water hammer
Unique design to prevent backflow
Negligible maintenance and energy costs
Will not warp or freeze
Quick interchange with any flap type check valve
Available in sizes from 1� to 96�

Body ABS
Inner Silicone
Type Duckbill
Opening Pressure 2.5~4.5 Kpa
Back Pressure = 500 Kpa
Common Inner Material Silicone/NBR/VITON/FVMQ/EPDM
Common Body Material
PP/ABS/PA66/PVDF
Common Port Size
1/4'', 1/8'', 1/16'', 3/8'', 3/16'', 5/16''
Experience 5-year History
Certificate ISO9001: 2008

Body PC
Inner Silicone
Type Diaphragm/Luer lock
Opening Pressure 0-1 Kpa
Back Pressure =300 Kpa
Common Inner Material Silicone/NBR/VITON/FVMQ/EPDM
Common Body Material
PP/ABS/PA66/PVDF
Experience 5-year History
Certificate ISO9001: 2008
Our factory support OEM/ODM, confirm the details as follows, then we will help you design a perfect valve or we can introduce a similar valve that in stock:
1) Where does the valve you use in?
2) What kind of medium the valve come into contact with? Water, air, gasoline, lubricator or other?
3) What is your using temperature?
Note: The 1)2)3) will make us choose the best material to make the valve for you.
4) What is the working pressure about the valve you require?
5) What is the rate of flow?
6) What is the opening pressure?
7) What is the max back pressure?
8) What is the approximate size of the valve? Such as diameter, ID and OD.
9) What is your annual quantity?

Product Grade: As per Client Requirement (MS/SS, etc)
Minimum and Maximum Price: As per Request
Price Units: USD
Incoterms: As per Mutual Understanding with Buyer
Product Origin: India
HS Code: Provided as per product
Minimum Order Size: NO MOQ (We can cater small quantities also)
Packaging Details: For Export Material (Export Quality Wooden Box)

Brass Swing Check Valve

BS 5154

Pressure Rating : PN-20

Material : Forged Brass

Description : Screwed in Cover

Ends : Screwed Female to BS:21

Item Code : FLB00045

Size : 15mm

Notes :

Available Valve Size : 15mm to 50mm