Flange Type Rubber Duckbill Check Valve
1. Passive operation — no moving parts, actuators, or external power required.
2. Non-clogging rubber duckbill matrix handles solids, sand, and slurry without jamming.
3. Silent non-slam closure eliminates water hammer and protects upstream pumping assets.
4. Zero maintenance costs — 20+ year service life with no scheduled maintenance requirements.
5. Wide size range DN100–DN2000 (4" to 80") for municipal and industrial applications.
6. DIN PN6/PN10 flanging with ANSI, BS10, JIS custom drilling available on demand.
7. Water-hammer attenuation reduces shock waves by 20–30%.
8. ISO-standard retrofit compatible with existing flap-type check valves — no structural modifications required.
Contact Us for Pricing
Interested in this product? Contact us now for detailed pricing and product information.
Product Details
Flange Type Rubber Duckbill Check Valve
Key Features at a Glance
1. Passive Operation — No Moving Parts
Line pressure differential opens the valve; reverse flow collapses the duckbill shut. Requires zero external power, actuators, or solenoid controls — ideal for remote or unmanned installations.
2. Non-Clogging Solids Passage
Flexible rubber duckbill matrix allows easy passage of suspended solids, sand, and slurry. Seals tightly around debris under reverse flow — no jamming, no blockage maintenance.
3. Silent Non-Slam Closure
Elastomeric geometry provides gradual, cushioned shutoff without metallic slam. Eliminates water hammer and acoustic fatigue — protects upstream pumping assets and downstream infrastructure.
4. Zero Backflow Maintenance Costs
One-piece rubber construction has no hinges, seats, or seals to wear out. Service life 20+ years with zero scheduled maintenance — dramatically lower lifecycle cost than metal swing or flap check valves.
5. Water-Hammer Attenuation
High-elasticity elastomer geometry naturally absorbs shock waves and pressure surges. Mitigates fluid hammer acoustics by 20–30% compared to rigid metal valve types.
6. Reliable Flanged Connection
Integrated full-rubber backing flange molded with metallic backing rings ensures secure, leak-free integration into heavy-duty municipal and industrial pipeline infrastructures.
7. Wide Size Range DN100–DN2000
Comprehensive sizing from 4-inch to 80-inch bore. DIN PN6/PN10 standard flanging with ANSI B16.5, BS10, JIS custom drilling available on demand.
8. ISO-Standard Retrofit Compatibility
Dimensional-matched for direct interchange with existing conventional flap-type check valves — no structural line framework modifications required.
Key Technical Advantages
- Reliable Flanged Connection: Rigid flanged design ensures a secure, leak-free integration into heavy-duty municipal and industrial pipeline infrastructures.
- Non-Clogging & Solids-Tolerant: The flexible rubber duckbill matrix allows easy passage of suspended solids, sand, and slurry, sealing tightly around debris under reverse flow.
- Water-Hammer Attenuation: High-elasticity elastomer geometry naturally absorbs shock waves, mitigating fluid hammer acoustics to protect upstream pumping assets.
- Low Cracking Pressure: Minimal forward pressure required to open — typically 1–2 kPa depending on size and material selection.
Technical Parameters & Materials
| Technical Property | Specification |
|---|---|
| Product Name | Flange Type Rubber Duckbill Check Valve |
| Series | DEVEL DF-Series (Full-Flanged Rubber Duckbill Design) |
| Bore Size Range | DN100mm – DN2000mm (4″ to 80″) |
| Flange Standard | DIN PN6 / PN10 (ANSI B16.5 / BS10 / JIS available on demand) |
| Elastomer Material | EPDM, Neoprene, Natural Rubber (NR) |
| Reinforcement Matrix | Heavy-duty, high-tenacity multi-layer vulcanized synthetic fabric blend |
| Cracking Pressure | 1–2 kPa (typical, size-dependent) |
| Operating Temperature | -20°C to +80°C (standard EPDM) / -40°C to +120°C (special compounds) |
| Service Life | 20+ years in typical municipal applications |
Dimensional Specifications & Flange Drilling Criteria
| inch | DN (mm) | Standard Length (mm) | Height (mm) | Flange Drilling Standard |
|---|---|---|---|---|
| 4 | 100 | 240 | 200 | DIN PN6 |
| 6 | 150 | 340 | 265 | DIN PN6 |
| 8 | 200 | 420 | 325 | DIN PN6 |
| 10 | 250 | 520 | 425 | DIN PN6 |
| 12 | 300 | 620 | 525 | DIN PN6 |
| 14 | 350 | 700 | 625 | DIN PN6 |
| 16 | 400 | 800 | 725 | DIN PN6 |
| 18 | 450 | 900 | 825 | DIN PN6 |
| 20 | 500 | 980 | 925 | DIN PN6 |
| 24 | 600 | 1060 | 1025 | DIN PN10 |
| 28 | 700 | 1160 | 1125 | DIN PN10 |
| 32 | 800 | 1350 | 1400 | DIN PN10 |
| 36 | 900 | 1500 | 1525 | DIN PN10 |
| 40 | 1000 | 1600 | 1625 | DIN PN10 |
| 48 | 1200 | 1880 | 1950 | DIN PN10 |
| 56 | 1400 | 2000 | 2320 | DIN PN10 |
| 64 | 1600 | 2300 | 2650 | DIN PN10 |
| 72 | 1800 | 2600 | 2960 | DIN PN10 |
| 80 | 2000 | 2800 | 3300 | DIN PN10 |
Engineering Note: Valves from DN100 to DN500 follow DIN PN6. DN600 and above switch to DIN PN10. Custom drillings (ANSI Class 150, JIS, BS) available on request.
Interchangeability & Structural Directives
Retrofitting Capabilities: Executed strictly under ISO standard guidelines to ensure a direct, dimensional-matched quick interchange with existing conventional flap-type check valves without modifying structural line frameworks.
Flange Alignment Notice: Ensure the structural mating flanges are cleaned of scaling residues and parallel. Bolting torques must be applied sequentially in cross-pattern sequences to guarantee a flat sealing compression across the vulcanized flange face.
Typical Applications
Municipal Drainage Networks
Stormwater outfalls, flood control pumping stations, combined sewer overflows (CSO).
Wastewater Treatment Plants
Effluent discharges, sludge handling lines, primary and secondary clarifier outflows.
River & Marine Outfalls
Tidal protection, river outflow basins, coastal cooling water intakes and discharges.
Industrial Applications
Mine dewatering, paper mill effluents, food processing discharge, power plant cooling circuits.
Product Tags
Flanged Design
Passive Backflow Preventer
Non-Clogging
Silent Closure
Water Hammer Attenuation
DN100-DN2000
DIN PN6/PN10
Municipal Drainage
Wastewater Treatment
Zero Maintenance
EPDM Rubber
Request a Quote for DEVEL Flange Type Rubber Duckbill Check Valves
Contact Henan Devel Fluid Equipment Co., Ltd. for technical specifications, custom sizing, and competitive pricing.
{
“@context”: “https://schema.org”,
“@type”: “Product”,
“name”: “Flange Type Rubber Duckbill Check Valve”,
“description”: “DEVEL DF-Series flange type rubber duckbill check valves DN100-DN2000. Passive operation, non-clogging, silent closure for municipal drainage and wastewater treatment systems.”,
“brand”: {
“@type”: “Brand”,
“name”: “DEVEL”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Henan Devel Fluid Equipment Co., Ltd.”
},
“category”: “Check Valve”
}
