Hot Products
0102030405
China Ductile Iron Split Body Full PTFE Butterfly Valve Suppliers | Factory Direct Sales for High Durability
| Valve Type: | Flange butterfly valve | Structure: | Concentric |
| Standard: | EN593 | Workmanship: | Investment casting |
| Sealing Direction: | Bidirectional | Sealing Grade: | Zero leakage |
| Temperature: | -20°C < T < 120°C | Operation: | Handle / Lever |
① Thick shell, heavy-type
② High purity rubber, high wear resistance
③ Zero leakage standard
④ Various size in stock
⚙ Characteristics
The split type valve body is fastened with high-strength bolts, and the valve body can be disassembled without dismantling the pipeline. The internal components such as the valve plate, valve seat, and lining can be directly removed, and the maintenance time is reduced by more than 60% compared to the integral butterfly valve. It is especially suitable for online maintenance of narrow spaces or large-diameter pipelines. The disassembled surface is precision machined and equipped with special sealing gaskets. After reassembly, the pressure bearing sealing performance of the valve body does not deteriorate, and it can maintain stable operation under nominal pressure for a long time.
★ Advantages
1
Lower Cost of Lining Maintenance and Replacement
If the PTFE lining shows local wear and aging, the valve body can be disassembled separately to replace the lining layer or damaged sealing components, without the need to replace the valve as a whole. Compared to the drawbacks of integral butterfly valves where the lining fails and the entire valve is scrapped, it significantly reduces long-term operating costs and is particularly suitable for high-frequency maintenance needs in highly corrosive conditions such as chemical and environmental protection.
2
Dual Improvement of Structural Strength and Sealing Reliability
The disassembly surface of the valve body is precision machined and equipped with high-performance sealing gaskets, which are tightened with bolts to ensure that the overall pressure sealing performance of the valve body is not lower than that of the integral structure. At the same time, the combination of symmetrical valve plate and PTFE soft seal still maintains ANSI Class VI zero leakage capability, and the seal is stable and leak free under bidirectional medium transportation conditions.
📦 Packing
Standard export wooden case packaging
🏭 Application Scenarios
It serves a broad range of critical applications: in the chemical industry, it is deployed for large-diameter acid-alkali pipelines, chlor-alkali production lines and pesticide intermediate synthesis systems; in environmental engineering, it is a staple for large-scale wastewater treatment plants.
? Frequently Asked Questions
What is a flange butterfly valve and how does it differ from a wafer butterfly valve?
A flange butterfly valve features flanged ends that bolt directly to mating pipe flanges, providing a more secure and leak-resistant connection compared to a wafer butterfly valve, which is clamped between two flanges. The flanged design is preferred for larger diameters and higher-pressure applications.
What does "zero leakage" sealing grade mean for this butterfly valve?
Zero leakage (equivalent to ANSI Class VI) means that when the valve is fully closed, no measurable fluid passes through the seat seal. This is achieved through the combination of a precision-machined PTFE soft seat and a symmetrical concentric disc, ensuring bubble-tight shut-off in both flow directions.
What is the advantage of the split-body design for maintenance?
The split-body design allows the valve body to be disassembled in-line without removing it from the pipeline. Internal components such as the disc, seat, and lining can be replaced directly, reducing maintenance time by more than 60% compared to integral butterfly valves and significantly lowering long-term operating costs.
What temperature range is this flange butterfly valve suitable for?
This valve is rated for operating temperatures between -20°C and 120°C, making it suitable for a wide range of industrial fluids including cold water, chemical solutions, and moderately heated process media. For applications outside this range, please consult our engineering team for alternative material options.
Which industries and applications is this valve best suited for?
This flange butterfly valve is widely used in the chemical industry for acid-alkali pipelines, chlor-alkali production, and pesticide synthesis systems. It is also commonly deployed in large-scale wastewater treatment plants and environmental engineering projects where corrosion resistance, zero leakage, and ease of maintenance are critical requirements.
Does the valve support bidirectional flow, and does reassembly affect sealing performance?
Yes, this valve is designed for bidirectional sealing, allowing it to handle flow and pressure from either direction without leakage. After disassembly and reassembly, the precision-machined mating surfaces combined with high-performance sealing gaskets ensure that the pressure-bearing and sealing performance is fully restored to original specifications.