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China Suppliers Factory WCB Split Body Full PTFE Lined Concentric Butterfly Valve - D341F Series DN40-DN2000
| 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 inner cavity of the valve body, the sealing groove of the disassembly surface, and the flange sealing surface are all coated with PTFE (or reinforced FEP) lining as a whole, with a thickness of 2-3mm. The lining is formed by compression molding and sintering process, and is firmly combined with the metal valve body without bubbles or delamination defects. It can completely isolate corrosive media such as strong acids, strong alkalis, and organic solvents from contact with carbon steel/stainless steel valve bodies, eliminating the risk of corrosion and leakage.
Advantages
1
Corrosion Resistance / Wear Resistance
The valve body material can be selected from carbon steel (WCB) and stainless steel (304/316), and the lining can be made of PTFE, FEP, nitrile rubber and other materials according to the characteristics of the medium. The PTFE lining version can withstand most corrosive media, and the wear-resistant modified lining version can cope with slurry media containing solid particles (such as desulfurization wastewater and slurry).
2
Fatigue Resistance and Operational Performance
The valve stem adopts an integrated forging process and is connected to the valve plate without a pin, avoiding the risk of loosening in traditional pin connections. It can withstand more than 100,000 opening and closing cycles without failure. Low opening and closing torque, labor-saving manual operation, fast response speed when paired with pneumatic/electric actuators, pneumatic opening and closing time ≤ 3 seconds, suitable for frequent opening and closing automation control systems.
Packing
📦
Standard export wooden case packaging
Application Scenarios
Widely used in the power industry for boiler steam pipelines and circulating water systems in thermal power plants, withstanding high temperature and high pressure conditions, as well as transportation pipelines for crude oil and refined oil in petrochemicals, and non corrosive medium reaction devices in refineries.
Frequently Asked Questions
Q
What is the standard specification for this flange butterfly valve?
This flange butterfly valve is manufactured in accordance with the EN593 standard, featuring a concentric structure and investment casting workmanship, ensuring consistent quality and dimensional accuracy.
Q
What temperature range can this butterfly valve handle?
The valve is designed for operating temperatures between -20°C and 120°C, making it suitable for a wide range of industrial fluid control applications.
Q
What lining materials are available and which corrosive media can they resist?
The valve lining can be made from PTFE, FEP, or nitrile rubber depending on the medium requirements. The PTFE/FEP lining effectively isolates strong acids, strong alkalis, and organic solvents from the carbon steel or stainless steel valve body, providing zero-leakage corrosion protection.
Q
How many opening and closing cycles can the valve stem withstand?
The valve stem uses an integrated forging process without pin connections, allowing it to withstand more than 100,000 opening and closing cycles without failure — ideal for frequent-operation automation control systems.
Q
What actuator options are compatible with this butterfly valve?
The valve supports handle/lever manual operation as well as pneumatic and electric actuators. When equipped with a pneumatic actuator, the opening and closing response time is ≤ 3 seconds, making it well-suited for automated pipeline systems.
Q
What industries and applications is this valve most suitable for?
This valve is widely used across multiple industries, including boiler steam pipelines and circulating water systems in thermal power plants, crude oil and refined oil transportation in petrochemical facilities, and non-corrosive medium reaction devices in refineries.