Wholesale China Suppliers PTFE Lined Flange Butterfly Valve CF8 Body - Concentric Resilient Seated Factory Series D41F Manufacturers, Factory

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Type: Concentric Resilient Seated Valve

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Series: D41F

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Size: DN40-DN2000/2–80

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Pressure Rating: PN6/PN10/PN16/5K/10K/150LB

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Design Standard: EN 593

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Service: OEM & ODM

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Our Concentric Resilient Seated Valves, part of the D41F series, are expertly designed for durability and efficiency. Produced by a trusted China factory, these valves combine high-quality stainless steel and PTFE materials to effectively resist erosion from various highly corrosive media. This makes them ideal for handling aggressive liquids and gases, including acids, alkalis, and salts. As leading suppliers in the industry, we ensure that our products meet the highest standards of performance and reliability, suitable for diverse applications.

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Product Description

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
Valve Highlight
  • Thick shell, heavy-type
  • High purity rubber, high wear resistance
  • Zero leakage standard
  • Various size in stock
🔬 Characteristics

The valve seat is made of PTFE material, which has extremely low friction coefficient, excellent chemical stability, and good self-lubricating properties, and can effectively resist corrosion from various strong acids, strong bases, and organic solvents.

PTFE Characteristics
Advantages
1 Bidirectional Sealing + Zero Leakage Guarantee

The midline structure allows the butterfly plate to be concentric with the valve seat throughout the entire process, and with the excellent fit of the PTFE valve seat, it can achieve bi-directional pressure sealing without distinguishing the flow direction of the medium, making installation more flexible. The low friction coefficient and elastic compensation ability of PTFE can effectively counteract the small deformation of the butterfly plate, easily achieve zero leakage sealing level, and meet the high requirements for medium leakage prevention in industries such as chemical and pharmaceutical.

2 Super Corrosion Resistance, Suitable for Complex Working Conditions

The valve body and butterfly plate are made of 304/316 stainless steel material, which is resistant to oxidation, acid and alkali. PTFE valve seats have extremely strong chemical stability and do not react with the vast majority of strong acids, strong bases, and organic solvents. The combination of the two can withstand the erosion of corrosive media (such as acid and alkali solutions, salt spray, organic solvents) and high-purity media (such as food and beverage, pharmaceutical raw materials), and is suitable for working conditions far beyond ordinary carbon steel or rubber valve seat butterfly valves.

📦 Packing
🪵 Standard export wooden case packaging
Valve Packing
🏭 Application Scenarios

Widely used in pipeline systems in industries such as chemical, petroleum, pharmaceutical, food, and environmental protection, especially suitable for handling highly corrosive and high-purity fluid media, such as various acid-base solutions, organic solvents, food and beverages, etc.

Application 1
Application 2
Application 3
Frequently Asked Questions
Q What standard does this flange butterfly valve comply with?
This flange butterfly valve is manufactured in compliance with the EN593 standard, ensuring consistent quality and dimensional accuracy for international pipeline applications.
Q What is the operating temperature range of this butterfly valve?
The valve is designed to operate within a temperature range of -20°C to 120°C, making it suitable for a wide variety of industrial fluid control applications.
Q Why is PTFE used as the valve seat material?
PTFE (Polytetrafluoroethylene) offers an extremely low friction coefficient, outstanding chemical stability, and excellent self-lubricating properties. It can resist corrosion from strong acids, strong bases, and most organic solvents, making it ideal for demanding industrial environments.
Q Does this valve support bidirectional sealing?
Yes. The concentric midline structure ensures the butterfly plate remains perfectly aligned with the valve seat in both flow directions, achieving reliable bidirectional sealing with zero leakage performance.
Q What body and disc materials are available?
The valve body and butterfly plate are available in 304 and 316 stainless steel, both of which offer excellent resistance to oxidation, acid, and alkali environments, suitable for corrosive and high-purity media.
Q What industries is this flange butterfly valve suitable for?
This valve is widely used across chemical, petroleum, pharmaceutical, food & beverage, and environmental protection industries. It is especially suited for handling highly corrosive fluids, organic solvents, and high-purity media such as food-grade liquids and pharmaceutical raw materials.

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