Hot Products
0102030405
China PTFE Seal Double Flange Butterfly Valve Suppliers - D41F Series, DN40-DN2000, High Pressure Factory
| 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 PTFE valve seat has super strong corrosion resistance. The valve body cavity, flange sealing surface, and key parts of the valve plate are all coated with PTFE (or reinforced FEP) lining, which can isolate corrosive media such as strong acids, alkalis, oxidants, and organic solvents from direct contact with the metal valve body. It is suitable for harsh media working conditions such as chemical and electroplating.
✦ Advantages
1 Bidirectional Zero Leakage Seal
Adopting a soft sealing structure, the PTFE valve seat is precisely adhered to the fluorine lined valve plate, combined with the symmetrical design of the centerline for force balance. The sealing performance can reach ANSI VI level, which can meet the zero leakage control requirements of high-purity media, toxic media or volatile media.
2 Lightweight and Efficient Opening and Closing
The midline structure ensures symmetrical force distribution when the valve plate rotates, significantly reducing the opening and closing torque. Manual operation is effortless, and the response speed is fast when driven by pneumatic/electric means (pneumatic opening and closing time is usually ≤ 2 seconds), making it suitable for automatic control systems with frequent opening and closing.
3 Structural Stability and Anti-Jamming
The valve stem adopts a stainless steel integrated structure, and the part in contact with the medium is covered with fluoroplastic, which not only prevents rust but also avoids deformation of the valve stem caused by medium erosion; The valve plate and valve stem are connected using a no pin connection process to eliminate connection gaps and prevent jamming faults during operation.
📦 Packing
Standard export wooden case packaging
⚙ Application Scenarios
Widely used for pipeline control of corrosive media such as sulfuric acid, hydrochloric acid, and chlor alkali, as well as wastewater treatment and exhaust gas recovery systems.
? Frequently Asked Questions
Q
What is the maximum operating temperature range of this flange butterfly valve?
This valve is rated for operating temperatures between -20°C and 120°C, making it suitable for a wide range of industrial applications including chemical processing, wastewater treatment, and electroplating systems.
Q
What sealing standard does this butterfly valve comply with?
The valve achieves ANSI VI level sealing performance, guaranteeing zero leakage. It meets the most stringent control requirements for high-purity media, toxic media, and volatile media applications.
Q
Is this valve suitable for corrosive media such as strong acids and alkalis?
Yes. The valve body cavity, flange sealing surface, and key parts of the valve plate are all coated with PTFE (or reinforced FEP) lining. This isolates corrosive media — including sulfuric acid, hydrochloric acid, strong alkalis, oxidants, and organic solvents — from direct contact with the metal valve body.
Q
Can this valve be used with pneumatic or electric actuators?
Absolutely. The centerline concentric structure significantly reduces opening and closing torque, making it compatible with both manual (handle/lever) and automated pneumatic or electric actuators. Pneumatic opening and closing time is typically ≤ 2 seconds, ideal for automatic control systems requiring frequent operation.
Q
What manufacturing standard does this valve follow, and what is the workmanship method?
This flange butterfly valve is manufactured to the EN593 standard using investment casting workmanship, ensuring precise dimensional tolerances, high structural integrity, and consistent quality across all production batches.
Q
How is the valve packaged for export, and are various sizes available?
All valves are packaged in standard export wooden cases to ensure safe international shipment. Multiple sizes are kept in stock to accommodate different pipeline specifications and project requirements, enabling prompt delivery.