Product Features
Anti-backflow design: The core design of the backflow preventer ball valve ensures that the valve automatically closes when the pipeline medium flows in reverse, preventing the medium from flowing back into the system, ensuring the safety and stability of the system.
Quick opening and closing: The ball valve only needs to rotate 90 degrees to complete the opening and closing action. It is simple to operate and responds quickly. It is suitable for occasions that require frequent operation.
Excellent sealing performance: The ball and the valve seat fit tightly, providing good sealing performance and preventing leakage. It has a stable sealing effect whether it is opening and closing or in static conditions.
Low flow resistance design: The ball valve has a full-diameter design with low fluid resistance, which reduces system energy consumption and improves work efficiency.
| Ordering model | Product model | Valve type | DN | Thread size | Kv value | Dimensions | Maximum closing pressure difference kPa |
|
| L | D | |||||||
| 15721 | DQF-G-N220 | 2 way | 20 | G3/4Internal thread | 11 | 64 | 42 | 500 |
| 15722 | DQF-G-N220A | 2 way | 20 | G3/4Internal thread | 23.5 | 66 | 35.5 | 500 |
| 15723 | DQF-G-N225 | 2 way | 25 | G1Internal thread | 23.5 | 81 | 40.8 | 500 |
| 15726 | DQF-G-W220 | 2 way | 20 | G3/4External thread | 20 | 72.5 | 35.5 | 500 |
| 15728 | DQF-G-W225 | 2 way | 25 | G1External thread | 23.5 | 86.2 | 40.8 | 500 |
| 15730 | DQF-G-W232 | 2 way | 32 | G1-1/4External thread | 36 | 96.7 | 44.4 | 300 |
| 15724 | DQF-G-N240 | 2 way | 40 | G1-1/2Internal thread | 63 | 103 | 63.8 | 300 |
| 15725 | DQF-G-N250 | 2 way | 50 | G2Internal thread | 95 | 113.5 | 70.5 | 300 |
Product advantages
Multifunctional integration: It has both interception function and can prevent medium backflow, reducing the complexity of the system.
Strong durability: The use of high-quality corrosion-resistant materials ensures that the valve can still operate stably for a long time under harsh working conditions.
Easy to maintain: Simple structure, few parts, easy maintenance and replacement, reducing operating costs.
FAQ
1.How does the backflow preventer ball valve perform in high-pressure applications?
Anti-backflow ball valves also perform well under high-pressure conditions, especially models made of pressure-resistant materials can effectively resist the impact of high-pressure media.
2.How to choose the body material of the anti-backflow ball valve?
The body material is usually selected according to the chemical properties, operating temperature and pressure of the medium. Common materials include stainless steel, brass and cast iron.
3.How does the anti-backflow function of the anti-backflow ball valve work?
When the medium flows normally, the valve remains open. When the medium flows back, the ball automatically closes to prevent backflow from entering the system.
4.What is the main difference between an anti-backflow ball valve and an ordinary ball valve?
The anti-backflow ball valve not only has the interception function of an ordinary ball valve, but also integrates the function of preventing the medium from flowing back. It is a multifunctional integrated design.
5.What directional requirements should be paid attention to when installing a backflow preventer ball valve?
Anti-backflow ball valves usually have flow direction marks. When installing, make sure to install them in the correct flow direction, otherwise the backflow function may fail.
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