Wholesale EPDM Rubber Flap Flange Check Valve Ductile Iron Supplier, Manufacturers
Product Description
Technical Specifications
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.
Key Advantages
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.
Low Flow Resistance, Energy-Saving & 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.
Shock Absorption, 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.
Material Composition
| Components Name | Material |
|---|---|
| Valve body / Valve cover | Cast iron, ductile iron, cast steel |
| Valve petal | Rubber Combination components |
| Spring | Stainless steel |
Dimensions & 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 |
Application Scenarios
Widely used in urban water supply and drainage, sewage treatment, fire protection systems, HVAC, water treatment plants, farmland irrigation and other fields, especially suitable for low-pressure and high flow pipeline systems with medium containing a small amount of impurities. It is a commonly used valve type for preventing medium backflow in civil buildings and municipal engineering.
Packaging
Standard export wooden case packaging
Frequently Asked Questions (FAQ)
Q What is the main application of a DIN F6 rubber flap swing check valve?
It is widely used in urban water supply and drainage, sewage treatment, fire protection systems, HVAC, and municipal engineering to effectively prevent backflow of medium under low-pressure conditions.
Q What operating temperature can this valve handle?
The valve is suitable for working temperatures ranging from -20°C to 120°C (-20°C < T < 120°C).
Q How does the rubber flap design achieve zero leakage?
The rubber valve disc makes surface contact with the valve seat and utilizes the reverse pressure of the medium to create a tight seal, offering superior sealing performance compared to traditional metal disc check valves.
Q What are the materials used for the valve components?
The valve body and cover can be made of cast iron, ductile iron, or cast steel. The valve petal utilizes rubber combination components, and the spring is made of durable stainless steel.
Q Why does this check valve offer low maintenance costs?
Designed without vulnerable moving parts like hinges, it avoids corrosion, jamming, and fatigue fractures. The wear-resistant, anti-aging rubber disc ensures a long service life and reduced maintenance frequency.
Q How does the valve reduce water hammer and noise?
The elastic buffering effect of the rubber valve disc prevents rigid impacts during closing, significantly dampening opening and closing noise, vibrations, and water hammer shock waves to safeguard the pipeline.
