Wholesale RPTFE seal concentric flange butterfly valve gear box operation Manufacturer, Factories

Type: Concentric Resilient Seated

Series: D341F

Size: DN40-DN2000/2”-80”

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

Design standard: EN 593

Service: OEM&ODM

Lined with polytetrafluoroethylene (PTFE), the centerline flange butterfly valve is widely applied in pipelines handling strong corrosive substances.

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

The midline design significantly reduces the opening and closing torque, making manual operation more effortless. Pneumatic/electric drive has lower energy consumption and faster response (pneumatic opening and closing ≤ 2 seconds); The valve plate and valve stem are connected without pins, and flange disassembly and assembly do not require special tools. The lining layer can be repaired or replaced separately after wear, without the need to replace the valve body as a whole.

Characteristics Diagram
Advantages

1. High maintenance convenience
The flange connection is easy to disassemble and assemble, and vulnerable parts such as valve plates and seats can be replaced separately without the need to disassemble the valve body as a whole; After the lining layer wears out, it can be re sprayed and repaired to reduce equipment maintenance costs and downtime.

2. Automation and explosion-proof compatibility
Supports DCS/PLC system integration control, can be paired with pneumatic and electric actuators; Optional explosion-proof certification execution mechanism can be selected to meet the safety requirements for use in flammable and explosive scenarios such as chemical, oil and gas industries.

3. Sanitary adaptability
Food grade PTFE lining meets FDA standards, with smooth inner walls that do not hang materials and are not prone to bacterial growth. It can be used in fluid delivery systems with high hygiene requirements such as pharmaceuticals, food and beverages.

Packing

Standard export wooden case packaging

Standard export wooden case packaging
Material Specifications
Part Name Material Name
Valve bodyCast iron, ductile iron, stainless steel
Valve discDuctile iron, Stainless steel, aluminium alloy
Valve stemCarbon steel, stainless steel
Valve seatRubber
SealO Type rang
Application Scenarios

Widely used in wastewater treatment, exhaust gas recovery systems, electrolyte circulation, acid pickling tank medium cut-off, high-temperature steam or corrosive gas regulation, but requiring temperature resistant lining.

Application 1
Application 2
Application 3
Dimension Data
Dimension Drawing
DN L L1 D D1 H H1 b n-Φd
mm inch PN1.0 PN1.6 PN1.0 PN1.6
502"10818012512515032683204-Φ184-Φ18
803"114180160160200363100224-Φ188-Φ18
1004"127180180180220396114228-Φ188-Φ18
1506"140180240240280453143248-Φ238-Φ23
2008"152270295295335578170268-Φ2312-Φ23

* Additional sizes up to 80" available upon request.

Frequently Asked Questions
What are the primary applications for this flanged butterfly valve?
This valve is widely used in wastewater treatment, chemical processing, acid pickling tanks, and gas recovery systems where corrosive media or high hygiene standards are required.
Can the valve handle corrosive fluids?
Yes, with the appropriate lining such as PTFE or high-purity rubber, the valve is designed for excellent corrosion resistance in chemical and industrial environments.
Is the sealing bidirectional?
Yes, the concentric structure and quality seat material ensure bidirectional sealing with a zero-leakage standard.
Can this valve be automated?
Absolutely. It is compatible with pneumatic and electric actuators and can be integrated into DCS/PLC control systems for automated operation.
Are different sizes available in stock?
We maintain a wide range of standard sizes in stock for quick delivery, ranging from DN50 up to larger industrial dimensions.
Is maintenance difficult for the flanged type?
No, the flange connection is specifically designed for easy disassembly. Vulnerable parts like the seat or disc can be replaced without replacing the entire valve body.

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