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Cast Steel CF8C 40” 300LB RF Flange Triple Offset Metal-To-Metal Butterfly Valve With Pneumatic Actuator and Manual Hydraulic Operation

  • Nominal Diameter:40”
  • Bore: Full Bore
  • Nominal Pressure:350LB
  • Material: CF8C
  • Operation: Pneumatic Actuator and Manual Hydraulic Operation
  • Design Standard: API609
  • Test/Inspection: API598
  • End Connection:RF FLANGE
  • Flange standard: ASME/ANSI B16.47
  • Top Flange: ISO5211

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Product Description:

What is a flanged Triple Offset metal-to-metal butterfly valve

FlangedTriple Offset metal-to-metal butterfly valve can be understood as a butterfly valve, with flanged connection, three-eccentric design, and the sealing surface is metal-to-metal structure, this butterfly valve is suitable for industrial applications requiring high reliability and performance, such as chemical, oil, natural gas, electric power and other fields. The flange connection makes installation and maintenance easier, while the Triple Offset and metal-to-metal seal design enables stable operation in harsh operating environments.

How do flanged Triple Offset metal-to-metal butterfly valves work

1. With the valve closed, the metal plate is located in the pipe, completely blocking the passage of fluid. At this point, the flange connection ensures that the valve is firmly attached to the pipe.
2. When it is necessary to open the valve, the operator activates the valve through manual or automatic control devices. During start-up, the disc begins to rotate, and its three-offset design makes the rotation trajectory of the disc eccentric. This eccentric design reduces operating torque at start-up and reduces wear.
3. As the disc rotates, the metal-to-metal sealing surface begins to separate, gradually allowing fluid to pass through. The three-offset design of the disc ensures smooth separation of the sealing surface and reduces friction, helping to extend the service life of the valve.
4. When the valve is fully open, fluid can flow freely through the pipe. The metal-to-metal sealing surface ensures good sealing performance of the valve in the open state.
When the valve is closed, the above process is reversed. The butterfly plate gradually contacts and seals, eventually returning to the closed position, preventing the passage of fluid.
5. FlangedTriple Offset metal-to-metal butterfly valves are designed for fast response, reliable sealing and long-life fluid control.

Flange Triple Offset metal to metal butterfly valve product overview

The Flanged Triple Offset metal-to-metal butterfly valve is a high-performance, high temperature and high-pressure fluid control valve with the following key characteristics:
Flange connection: The standard flange connection ensures that the valve can be easily installed in the piping system. The flange connection is secured by bolts and nuts to provide a strong connection.

1. Three-offset design
The valve adopts a three-offset design, including three directions of eccentric axis, radius and Angle. This design reduces operating torque at start-up, improves sealing performance, reduces wear, and extends valve life.

2. Metal-to-metal seal
The sealing surface of the valve adopts a metal-to-metal structure, usually using high corrosion resistance and high wear resistance metal materials. This design ensures excellent sealing performance under high temperature, high pressure and corrosive media.

3. High-temperature and high-pressure application
Suitable for high temperature and high pressure environment, such as chemical, oil, natural gas and other industrial fields. The metal-to-metal sealing surface of the valve provides stable operation under extreme conditions.

4. Reliable fluid control
The valve has the ability to respond quickly and smooth fluid control to adapt to the rapid changes and demands of the fluid medium.

5. Widely used
It is widely used in oil refining, chemical industry, electric power, water treatment and other fields, especially for industrial fluid control occasions requiring high performance, reliability and long life.

6. Optional operation mode
The valve can be configured with manual operation device, worm gear, electric actuator and other operating modes to meet the needs of different systems and applications.

7. Compliance with standards
Valve manufacturing meets relevant international standards to ensure product quality and performance meet industry requirements

Flanged Triple Offset metal-on-metal butterfly valve application site

1. Chemical industry: In the process of chemical production, it is necessary to control the fluid of various corrosive, high-temperature and high-pressure chemical media. The corrosion resistance and high sealing of flangedTriple Offset metal-to-metal butterfly valves make them ideal for the chemical industry.

2. Oil and gas industry: Used in pipeline transportation, refineries, natural gas processing plants and other fields. The high temperature and pressure resistance of the valve make it suitable for handling complex media such as oil and natural gas.

3. Power industry: In thermal power plants, nuclear power plants and other power facilities, used to control the flow of water, steam and other working substances. Its fast response and reliable sealing performance are very important in power systems.

4. Water treatment and sewage treatment: used to control the flow of tap water, industrial wastewater and sewage. The high performance of flangedTriple Offset metal-to-metal butterfly valves ensures reliable operation during water treatment.

5. Pharmaceutical industry: In pharmaceutical production, high precision control of fluids is required. The valve responds to the requirements of the pharmaceutical industry for fluid control accuracy and hygiene standards.

6. Food and beverage industry: used to control the flow of various liquids and gases in the production of food and beverages. The metal-to-metal seal ensures compliance with hygiene and quality standards.

7. Marine engineering: In Marine engineering such as offshore oil fields and offshore platforms, flanged Triple Offset metal-to-metal butterfly valves can be used to control the flow of seawater, oil and gas.

8. High-temperature and high-pressure process: In the industry that needs to withstand high temperature and high-pressure process, such as high-temperature heat exchange, high-temperature furnace melting process.

Standards for triple Offset butterfly valves

Valve Size DN50-1600, NPS 2-60
Pressure Rating N1-100, 150LB-600LB
Materials WCB, LCB, LC1, CF8, CF8M, CF3, CF3M, 4A, 5A, WC6, WC9, C95800
Design and Manufacturing Standards API 609, EN 593
Face to Face Standards API 609, EN 558, ISO 5752
Flange Size Standards ASME B 16.5, ASME B16.47, EN 1092-1, GOST 54432, JIS 2220
Stress Test Standards API 598, EN 12266-1
Fire Safety Test Standard API 607
Quality/Product Certifications ISO9001, ISO14001, ISO18001
Unorganized Emissions ISO 15848-1, API 622
National ACE NACE MR0175, NACE MR0103
Valve Operator Options hand wheel, worm wheel, electric actuator, pneumatic actuator, hydraulic actuator.
Shutdown Level API 598 (Zero leakage)
Aperture full aperture
Process Connection Types sandwich, flange, lug, welding


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