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Cast Steel CF8M 24” 600LB RF Flange Double Offset Butterfly Valve

  • Nominal Diameter:24”
  • Bore: Full Bore
  • Nominal Pressure:600LB
  • Material: CF8M
  • Operation: Gear Box
  • Design Standard: API609
  • Test/Inspection: API598
  • End Connection: RF FLANGE
  • Flange standard: ASME/ANSI B16.5
  • Top Flange: ISO5211

PS: We can manufacture valves to customers’ requirements.

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Product Description:

K-LOK polymer and elastomer seats provide bi-directional, drop-tight shut-off in vacuum as well as at full rated differential pressure. Its unique design does not rely on pressure to assist sealing therefore seals at high and low pressures, as well as dirty services. A variety of materials allows optimum seat life in all applications.

1. Anti-blow shaft
Blow-out resistant shaft is standard on all valves for increased safety.

2. Unique packaging design
Unique packing design allows for use in pressure as well as vacuum without modification or special assembly.

3. Stability
Disc taper pins are tangentially positioned half in disc and half in shaft, placing them in compression rather than shear, which eliminates potential for failure.

4. Rocker-shaped gland bridge
Rocker-shaped gland bridge compensates for uneven adjustment of gland nuts reducing packing leaks.

5. Integrated cast valve disc limiter
-Integrally cast disc position stop perfectly locates the disc in seat, achieving maximum seat and seal life.

6. Lengthen neck
The extended neck allows for 50 mm (2″) of pipeline insulation.

7. One piece casting
Integrally cast mounting pad provides direct mounting of actuators eliminating the need for costly brackets and couplings.

8. Flat body hole
Flattened body bore at shaft journal ports positions shaft bearings near disc, providing maximum shaft support resulting in reduced wear and longer life.

Introduction of Double Offset Butterfly Valve

Primarily designed to meet the stringent requirements and safety levels of the oil & gas industry, this high performance butterfly valve is available in a range of sizes, from 3 inches to 24 inches (DN 80-600). This makes them ideally suited for a host of applications, including firewater, hydrocarbons, cargo handling, bilge and ballasts and utilities, just to name a few.
Manufactured to ASME 150 and 300 standards, features a soft polymer seat. Customers can specify PTFE, RTFE or UHMWPE seats, depending on their application and the performance characteristics required.
The new valve is available in a choice of body materials , carbon steel for general applications, 316 stainless steel and duplex stainless steel for applications requiring superior corrosion resistance.

Application of  Double Offset Butterfly Valve

1. Modulating service
2. Airport refueling
3. Hydrocarbon processing
4. Chemical/petrochemical processing
5. Purified gas
6. Steam and vacuum services
7. Power and Utilities
8. Refrigeration
10. Alumina refining

Specifications Double Offset Butterfly Valve

Valve Size 2″-24″
Pressure Class 150LB 300LB
Materials WCB, CF8 , CF8M, CF3M
Design and Manufacturing Standards API609
Face to Face Standards ANSI/ASME B16.10
Flange Dimension Standards ANSI/ASME B16.5
Pressure Test Standards API598
Fire Safety Test Standards
Quality/Product Certifications ISO9001, ISO14001, ISO18001
Fugitive Emissions ISO 15848-1, API 622
Valve operator options Handwhel, Worm Gear, Electric actuator, Pneumatic actuator, Hydraulic Actuator.
Shutoff Class API 598 (Zero Leakage), API 6D
Bore Full Bore
Process Connection Types Wafer type, Lug Type


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TIANYU Valve, with its experienced specialists, specializes in manufacturing industrial valves and provides technical support and one-stop solutions for the global market.

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