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Technical Specifications
| Valve Type |
Swing check valve |
Structure |
Rubber flap type |
| Standard |
DIN F6 |
Workmanship |
Investment casting |
| Sealing Direction |
Single-directional |
Sealing Grade |
Zero leakage |
| Temperature |
-20°C < T < 120°C |
Operation |
Self-starting |
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Characteristics
The rubber valve disc is in surface contact with the valve seat for sealing, and can achieve a tight fit with the help of reverse pressure of the medium. Its sealing performance is better than that of traditional metal disc check valves, which can effectively prevent medium leakage under low pressure conditions, especially suitable for pipeline systems with non particle or small particle media such as clean water and sewage.
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Key Advantages
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Simple structure, low failure rate:
Without hinges, springs, and other vulnerable moving parts, it fundamentally avoids problems such as component corrosion, jamming, fatigue fracture, etc; The rubber valve disc is wear-resistant, anti-aging, and has a long service life, greatly reducing the maintenance frequency and cost of the valve.
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Low flow resistance, energy-saving and efficient:
The straight through flow channel is matched with a rubber valve disc that adheres to the wall in a fully open state. The medium passes through almost unobstructed, with low pressure loss, which can reduce the energy consumption of upstream power equipment such as water pumps and improve pipeline transportation efficiency.
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Shock absorption and noise reduction, smooth operation:
Rubber valve disc has good elastic buffering effect, no rigid impact when closed, and can significantly reduce the noise and vibration during valve opening and closing; At the same time, it can weaken the damage of water hammer impact to pipelines and valves, and protect the stable operation of the system.
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Material Composition
| Components Name |
Material |
| Valve body / Valve cover |
Cast iron, ductile iron, cast steel |
| Valve petal |
Rubber Combination components |
| Spring |
Stainless steel |
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Dimension Data
| DN (mm) |
L |
D |
D1 |
dn |
n |
| 50 | 203 | 165 | 125 | 17.5 | 4 |
| 65 | 216 | 185 | 145 | 17.5 | 4 |
| 80 | 241 | 200 | 160 | 17.5 | 8 |
| 100 | 292 | 220 | 180 | 17.5 | 8 |
| 150 | 356 | 285 | 240 | 22 | 8 |
| 200 | 495 | 340 | 295 | 22 | 8 |
| 250 | 622 | 395 | 350 | 22 | 12 |
| 300 | 698 | 445 | 400 | 22 | 12 |
| 350 | 787 | 505 | 460 | 22 | 16 |
| 400 | 914 | 565 | 515 | 22 | 16 |
| 450 | 978 | 615 | 565 | 26 | 20 |
| 500 | 978 | 670 | 620 | 26 | 20 |
| 600 | 1295 | 780 | 725 | 30 | 20 |
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Application & Packing
Applications: Widely used in urban water supply and drainage, sewage treatment, fire protection systems, HVAC, water treatment plants, farmland irrigation and other fields.
Packing: Standard export wooden case packaging.
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Frequently Asked Questions
Q1: What makes the rubber flap check valve ideal for sewage systems?
A: Its rubber disc provides superior surface contact sealing and is highly resistant to small particles and impurities, preventing backflow even in low-pressure conditions common in sewage management.
Q2: How does this valve reduce noise during operation?
A: The elastic properties of the rubber valve disc provide a buffering effect, eliminating rigid impacts when closing, which significantly lowers vibration and noise levels.
Q3: Is the valve maintenance-intensive?
A: No. Due to its simple structure without hinges or springs, there are fewer moving parts to corrode or jam, leading to a much lower failure rate and reduced maintenance costs.
Q4: What are the standard pressure and temperature ratings?
A: The valve is designed to the DIN F6 standard and operates effectively within a temperature range of -20°C to 120°C.
Q5: Does the valve interfere with flow efficiency?
A: Minimal interference. The straight-through flow design and a disc that stays close to the wall when open ensure very low flow resistance and minimal pressure loss.
Q6: What body materials are available?
A: Depending on the specific requirements, the valve body and cover can be manufactured from cast iron, ductile iron, or cast steel.
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