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Corrosion Resistant Maintenance Free Duckbill Check Valve with ZTC Certification for Waterproof Systems

Corrosion Resistant Duckbill Check Valve

Maintenance Free Rubber Duckbill Valve

ZTC Certified Duckbill Non Return Valve

Place of Origin:

China

Brand Name:

JINGNING

Certification:

Model Number:

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Corrosion Resistant Maintenance Free Duckbill Check Valve with ZTC Certification for Waterproof Systems

Product Details

Size:

DN200

Certificate:

ISO9001,CE，ZTC

Connection:

Flange

Warranty Time:

18months

Key Word:

Rubber Expansion Joints Manufacturers

Flange Material:

Q235, SS304, SS316

Rubber Material:

EPDM, NBR, NR

OEM:

20Years' Experience

Sample:

Freely

Payment & Shipping Terms

Minimum Order Quantity

Price

$10.1~$98.2/pc

Packaging Details

Wooden Box

Delivery Time

5-8 work days

Payment Terms

L/C,D/A,D/P,Western Union,T/T,MoneyGram

Supply Ability

5000 Sets/Week

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86-150-93112546

joints@chnflex.com

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Product Description

Rubber Expansion Joints Manufacturers Duckbill Check Valve DN50-DN3000

Rubber Expansion Joints Manufacturers provide a full range of high-quality rubber expansion joints and duckbill check valves from DN50 to DN3000, designed for reliable performance in water supply, wastewater, irrigation, and industrial pipeline systems. Our rubber expansion joints are engineered to absorb vibration, reduce noise, and compensate for thermal movement or misalignment, ensuring long-term protection of pumps and piping equipment. The duckbill check valve offers a simple, maintenance-free solution for backflow prevention, using its flexible rubber "duckbill" outlet to allow forward flow under pressure and instantly seal when flow reverses.

Features & Benefits

100% full rubber structure, which can meet various anti-corrosion requirements (different rubber materials can be selected according to the actual demand)
No blockage and excellent sealing performance
Long service life, no fault and maintenance free operation
No moving parts or mechanical components, eliminating noise and manual operation requirements
Low opening pressure - valve can open with water head more than 0.01M
Minimizes head loss in pipeline systems
Flexible installation options to meet customer requirements
Convenient installation with low cost and operational expenses

Technical Specifications

Pipe Size ID	Length	Height	Flange Outside Diameter
DN(mm) \| NPS	L(mm)	H	A
50 \| 2	150	100	150
80 \| 3	220	140	200
100 \| 4	250	200	225
150 \| 6	340	265	275
200 \| 8	420	325	338
250 \| 10	520	425	400
300 \| 12	620	525	485
350 \| 14	700	625	525
400 \| 16	800	725	588
450 \| 18	900	825	625
500 \| 20	980	925	688
600 \| 24	1120	1025	800
700 \| 28	1180	1125	969
800 \| 32	1350	1400	1080
900 \| 36	1500	1525	1150
1000 \| 40	1600	1725	1325
1200 \| 48	1840	1950	1485

For duckbill check valve, if there are other standard requirements or special flange needs to be customized, please provide written drawings, standards and information, we can customize duckbill check valve for you.

Product Advantages

Competitive factory pricing
17 years of manufacturing experience with 5 years of export experience
Strict quality inspection exceeding industry standards
Customization and OEM services available for various specifications
Free samples available upon request
Large inventory for quick delivery

Applications

The duckbill check valve features an integrated flange design for easy installation. Its all-rubber construction prevents blockage and jamming while allowing solid particles to pass through smoothly, reducing maintenance costs. Primary applications include:

Waterproof systems
Drainage systems
Pump outlets
Lifting pump stations
Submerged aeration systems

Our Services

24-hour customer support
Free product samples
Customization services
Technical drawings provided
Multiple payment options
Factory inspection services (material, specifications, quantity, pressure, packaging)
Extended warranty period
Secure packaging for transportation

Frequently Asked Questions

Q: What's the rubber material of Rubber Expansion Joints Manufacturers?

A: EPDM, CR, NBR, etc. Material selection depends on the working environment and media.

Q: Is the flange galvanized?

A: Yes, we offer both electronic galvanized and hot dip galvanized flanges, as well as painted flanges.

Q: Can the product be marked with customized logo?

A: Yes, we provide OEM/ODM services including custom logo marking.

Q: Can you provide product drawings?

A: Yes, we can provide technical drawings upon request.

Tags：

Corrosion Resistant Maintenance Free Duckbill Check Valve with ZTC Certification for Waterproof Systems

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