Custom Molded Rubber Duckbill Check Valve, one-way non-return valve with low cracking pressure. Self-sealing, excellent UV, ozone and weather resistance to prevent backflow of water and gas. Custom size and slit design for drainage, water treatment and marine outfall.
Item No :
Lead-V001Brand :
LEADUsage :
Used for sewage drainage, stormwater outfall, water treatment, aeration equipment, marine discharge, automotive vent and low-pressure fluid systems.Size :
custom sizeMOQ :
500-1000PCSLead Time :
7-15daysPayment :
100% TT, L/C at sigh, Paypal, Wester unionCustom Molded rubber valve
Our custom molded EPDM duckbill check valves are integrated one-piece elastomer non-return valves. The duckbill slit opens under forward fluid/gas pressure and closes automatically to stop backflow. No spring or extra moving parts, simple structure and reliable sealing.
Made of premium EPDM, it features outstanding UV, ozone and weather aging resistance. Continuous working temperature: -40°C ~ +120°C. We customize outer diameter, slit thickness, mounting structure and cracking pressure per your drawings or samples.
Suitable for sewage drainage, stormwater outfall, water treatment, aeration systems, marine discharge and automotive venting. RoHS, REACH and ISO9001 certificates can be provided on request.
| Item Name | Custom Molded Rubber Duckbill Check Valve, Low Pressure Anti-Backflow One Way Valve for Sewage Drainage |
| Material | EPDM ,silicone ,FKM,CR,NBR ,NR etc |
| Hardness | 30-90Shore A |
| Color | We can customize it according to your requirements. |
| Manufacturing | Compression molding |
| Working Temperature | Standard temperature range: -40°C ~ +120°C |
| Price Tip | The price shown above is just for reference, fnal actual price depends on your design, material request, surface treatment order aty, package request etc. |
| Certifications | RoHS, REACH certificate |
Our molded rubber components comply with GB/T 3672‑2002 (ISO 3302‑1:1996). Four tolerance grades M1~M4 are optional. We separate F fixed dimensions and C closure dimensions to meet your precision requirements for custom rubber seals.
We can provide complete physical test reports according to your material requirements, including hardness, tensile strength, elongation, compression set, temperature range and chemical resistance.
We are able to supply COA, COC and compliance documents for REACH, RoHS, FDA and UL. Batch traceability is guaranteed for custom molded sealing parts.
Xiamen Lead Rubber & Plastic Industry Co., Ltd. is a professional factory focused on the design and fabrication of rubber & plastic molds, as well as custom molded rubber and plastic components.
We specialize in exporting O-rings, rubber gaskets, various rubber seals, rubber bumpers, molded plastic parts, precision tooling molds and other custom molded products.
Our in-house mold workshop develops custom molds for a wide range of rubber and plastic materials. We design and manufacture tooling strictly according to customers’ 2D/3D drawings, samples and technical specifications.
We provide full one-stop OEM & ODM solutions for global buyers, covering mold development, material formulation, prototyping, mass production and quality inspection. Our products widely serve automotive, hydraulic, pneumatic and general industrial sealing applications.
Custom rubber molded products Manufacturing
Lead Rubber is a professional manufacturer specializing in custom molded rubber sealing components and mold fabrication.
We mainly export custom rubber O-rings, gaskets, various rubber seals, rubber bumpers, precision molds and other custom molded rubber & plastic parts.
We develop custom molds for a wide range of rubber and plastic materials based on customers’ drawings, samples and technical requirements. We deliver one-stop OEM & ODM custom sealing solutions for global buyers.
Lead rubber offers full OEM development for custom molded rubber O-rings, gaskets and seals, plus custom plastic components.
Following your drawings, samples or technical specifications, we manufacture tailored sealing parts with our in-house mold workshop covering mold design, CNC machining, trial testing and validation.
We support multiple materials including NBR, EPDM, FKM, Silicone and engineered plastics. Our engineering team collaborates with you for prototype sampling and mass production tooling to balance quality, lead time and cost.
Lead rubber has rigorous quality control & testing system covers the full production cycle: incoming raw material inspection, in-process monitoring, sample validation and final batch release for all custom molded rubber & silicone components. Every molded gasket and seal is inspected to meet drawing tolerances, material specs and global compliance standards, delivering stable sealing performance for electronics, energy storage, EV and industrial applications.
Lead Rubber offers packaging options for international shipments, including PE bags, export carton, and palletized packaging where required. Customized packaging, logo printing, and product labeling can be discussed according to order quantity and customer requirements.
Packaging methods are selected according to the product type, shipment method, and destination requirements. Please confirm any special packaging or labeling instructions before placing an order.
1: What is a rubber duckbill check valve?
A: It is an integrated one-piece rubber non-return valve. The duckbill slit opens under forward pressure and closes automatically to block backflow, with no springs or moving parts.
Q2: What rubber materials are available?
A: EPDM, silicone, NBR, FKM, neoprene and natural rubber. EPDM is ideal for outdoor drainage, UV and weather resistant conditions.
Q3: What temperature can EPDM duckbill valve withstand?
A: Continuous working temperature: -40°C ~ +120°C, intermittent peak up to 150°C.
Q4: Is EPDM duckbill valve oil resistant?
A: No. It is not suitable for mineral oil, fuel and hydrocarbon media. Choose NBR or FKM for oily working environments.
Q5: What are the common types of rubber check valves?
A: Duckbill valve, umbrella valve, mushroom valve and cross slit valve. Duckbill type is widely used for drainage and outfall.
Q6: Where are rubber duckbill valves applied?
A: Sewage drainage, stormwater outfall, water treatment, aeration systems, marine discharge, automotive venting and low-pressure gas/liquid circuits.
Q7: Can you customize rubber duckbill valves?
A: Yes. We customize size, slit thickness, cracking pressure, hardness and connection structure (flange, barbed etc.) based on drawings or samples.
Q8: What hardness options are available?
A: Custom hardness range: 40–90 Shore A. 50–70 Shore A is common for flexible, low opening pressure performance.
Q9: What are its advantages?
A: Low cracking pressure, self-sealing, maintenance-free, compact structure, easy installation and good weather resistance.
Q10: What certifications can you provide?
A: RoHS, REACH, ISO9001 documents are available on request. FDA grade silicone rubber valve is optional for food & medical use.
Request a Quote for rubber Valve,Contact Lead Rubber with your specifications.
Please submit 2D/3D CAD drawings or physical samples, dimensions, rubber material, hardness, quantity, application and special performance requirements for quotation. If custom mold tooling is needed, also advise cavity quantity and mold steel preferences.
Contact Person: Sunny
Tel: 0086-13400616316
WhatsApp: 0086-13400616316
Email: sales1@leadindustryproducts.com
Contact Person: Lucy
Tel: 0086-13328793979
WhatsApp: 0086-13328793979
Email: sales4@leadindustryproducts.com
Contact Person: Nana
Tel: 0086-15872688050
WhatsApp: 0086-15872688050
Email: sales2@leadindustryproducts.com
Pricing Notice: The displayed price is for reference only. The final quotation depends on product design, material selection, dimensions, tooling requirements, order quantity, surface treatment where applicable, and packaging specifications.
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