Body RF Flanges Ball Valve is a quarter-turn isolation device featuring Raised Face (RF) flanges that concentrate bolt pressure for superior sealing in PN16–PN40 systems. Typically constructed from ASTM A216 WCB with RPTFE seats, it ensures bubble-tight shut-off for oil, gas, and steam. Its blow-out proof stem and fire-safe design, compliant with API 6D standards, provide critical safety in high-pressure environments, while the bolted flange connection allows for easy maintenance and secure pipeline integration.
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Body RF Flanges Ball Valve - 8&12inche - 300LB - A216WCB drawning
Technical Parameters Table
| Item | Technical Data | Note |
| Pressure Rating | PN16, PN25, PN40 (Class 150/300) | Based on industrial requirements |
| Operating Temp. | -29°C ~ 200°C (Soft Seat) | Limited by RPTFE seat material |
| Design Standard | API 6D / ASME B16.34 | International standard compliance |
| Face-to-Face Std. | ASME B16.10 / EN 558-1 | Standard interchangeability |
| Testing Standard | API 598 / EN 12266-1 | 100% pressure tested before shipping |
| Leakage Class | Grade A (Zero Leakage) | Bubble-tight seal (Soft seated) |
| Operation Type | Lever / Gear / Pneumatic / Electric | Gear recommended for ≥DN150 |
| Applicable Media | Water, Oil, Natural Gas, Chemicals | WCB not for strong acids/bases |
Components & Materials (ASTM A216 WCB)
Standard configuration for non-corrosive industrial service.
| Component | Material Specification | Remarks |
| Valve Body | ASTM A216 WCB | Cast carbon steel with epoxy coating |
| Ball | ASTM A182 F304 / A351 CF8 | Mirror polished to reduce operating torque |
| Valve Seat | RPTFE | Reinforced with 15% glass fiber for wear resistance |
| Stem | ASTM A276 410 / 304 | Blow-out proof safety design |
| Packing | Flexible Graphite | High-temperature resistance, fire-safe compliant |
| Thrust Washer | PTFE + 25% Carbon | Self-lubricating material |
| Body Bolts | ASTM A193 B7 | High-strength alloy steel studs |
Dimension Table: PN40 WCB RF Flanged Ball Valve
Dimensions based on ASME B16.10 (Face-to-Face) and EN 1092-1 (Flanges).
| Size (DN) | Face-to-Face L (mm) | Flange OD D (mm) | Bolt Circle K (mm) | Bolt Holes n-Ø | RF Dia. d (mm) | RF Height f (mm) | Weight (kg) |
| DN50 | 230 | 165 | 125 | 4-Ø18 | 102 | 3 | 18 |
| DN80 | 310 | 200 | 160 | 8-Ø18 | 138 | 3 | 32 |
| DN100 | 350 | 235 | 190 | 8-Ø22 | 162 | 3 | 55 |
| DN150 | 480 | 300 | 250 | 8-Ø26 | 218 | 3 | 120 |
| DN200 | 600 | 375 | 320 | 12-Ø30 | 285 | 3 | 245 |
Features: Body RF Flanged Ball Valve
RF Sealing Performance: The 3mm raised face ensures high unit pressure on the gasket. When used with spiral wound gaskets, it provides superior sealing for PN40 medium-to-high pressure systems.
Blow-out Proof Stem: The stem is designed with an integral T-type shoulder, internally loaded. This ensures the stem cannot be ejected from the body even under extreme cavity pressure.
Anti-Static Device: A spring-loaded ball is fitted between the ball/stem and stem/body to ensure electrical continuity, discharging static electricity buildup and preventing sparks in flammable environments.
Fire-Safe Design: In the event of a fire that destroys the soft seats, the ball is pushed by pressure against a secondary metal seat integrated into the body to achieve a temporary seal.
ISO 5211 Direct Mount Pad: Most modern designs feature a standardized mounting flange, allowing for the direct installation of pneumatic or electric actuators without the need for additional brackets.
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FAQ
What does RF mean on a valve?
RF stands for Raised Face.
It refers to a flange design where the gasket sealing surface is elevated (usually by 3mm or 1/16") above the bolt hole face.
What is a flanged ball valve used for?
A flanged ball valve is primarily used for reliable on/off (shut-off) flow control in industrial piping systems. Because the flanged ends are bolted directly to the pipe, they are the preferred choice for:
High-Pressure & Large Diameter Pipes: Flanges provide a stronger, more leak-resistant connection than threaded or welded joints in heavy-duty environments.
Easy Maintenance: The valve can be easily unbolted and removed from the pipeline for repair or replacement without cutting the pipe.
Diverse Media: They are used to handle liquids, gases, and slurries in industries like oil and gas, chemical processing, water treatment, and power plants.
Bubble-Tight Sealing: They are ideal for applications requiring a "zero-leakage" seal to ensure safety and prevent environmental contamination.
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