Flanged Ball Valves
A flanged ball valve is bolted to the mating flanges on the pipeline through the flanges at both ends of its body and opens or closes flow with a 90° turn of the ball. It is preferred on larger bores where a threaded joint is not sufficient and on lines that need a detachable connection.
This subgroup includes short pattern cast iron body valves, three piece cast and stainless steel body valves and models intended for natural gas lines. The body construction is selected according to bore, pressure class and maintenance frequency.
Main Applications
- Main distribution lines in heating and cooling circuits
- Boiler room header and pump set connections
- Stainless process lines in food and chemical plants
- Shipbuilding and paper mill installations
- Hot water, cold water and condensate lines
- Natural gas distribution and main shut-off points with suitable models
Technical Data
| Connection | Flanged; EN 1092-2 flange standard on short pattern |
|---|---|
| Bore range | DN15 – DN250 (depending on body type) |
| Pressure class | PN10 / PN16 / PN40 (depending on model) |
| Max. working pressure | 16 bar (cast) · 40 bar (stainless) |
| Temperature | −25 °C … +180 °C (depending on material) |
| Body material | Grey cast iron, ductile iron, cast steel, stainless steel |
| Body construction | Two or three piece |
| Bore type | Full bore; reduced bore type on large sizes |
| Actuator mounting | ISO 5211 top flange (on suitable models) |
| Operating torque DN50 | 25 N·m (three piece models) |
| Operating torque DN100 | 110–120 N·m (depending on model) |
| Factory test | 100% tested with 10 bar air in open and closed positions on stainless models |
Material Options
| Part | PN16 · grey cast iron (short pattern) | PN16 · ductile iron (three piece) | PN40 · stainless (three piece) |
|---|---|---|---|
| Body | Grey cast iron GG25 | Ductile iron GGG-40.3 | Stainless steel AISI 304 / 316 |
| Cover | Grey cast iron GG25 | Grey cast iron GG25 | Stainless steel AISI 304 / 316 |
| Ball | GGG40 / AISI 430 / AISI 304 | Stainless steel | Stainless steel AISI 304 / 316 |
| Ball seat | PTFE | R-PTFE (15%) | R-PTFE (15%) |
| Stem / pin | C1040 – X20Cr13 | Stainless steel | Stainless steel AISI 304 / 316 |
| Gland packing | PTFE | PTFE | PTFE |
| Handle | St-37 | Carbon steel | Stainless steel AISI 304 |
| Bolts and nuts | C1030 | Carbon steel | Stainless steel AISI 304 |
Values are taken from the part lists of three separate manufacturer datasheets; material codes for cast steel and natural gas models vary by model. The three piece ductile iron datasheet lists two different cast grades for the body, so this is confirmed before ordering.
Advantages
Detachable Joint
- The valve is removed from the line simply by undoing the flange bolts.
- Gaskets are replaced without cutting the pipe.
Secure on Large Bores
- Full bore models are available up to DN250.
- A flanged joint withstands vibrating lines better than a thread.
Ready for Automation
- An actuator mounts directly on top-flange models.
- The valve stays in place when switching from manual to automatic.
Low Loss
- At full bore the pressure drop equals that of a pipe of the same size.
- Pump energy is not wasted.
Construction and Design Features
- The short pattern body has two parts and a shorter face-to-face length than other types.
- In a three piece body the centre section is removed by undoing the bolts while the flanged ends stay in the line.
- The stem is mounted from inside the body; a PTFE and O-ring system provides extra sealing.
- Ball sealing and stem sealing are arranged in two stages.
- On large cast models a reduced bore ball lowers weight and torque.
Send us the DN, PN, flange standard and medium; we will define the body type and actuator requirement together.
How to Choose?
- Define bore and flange standardCheck the DN and drilling of the mating flange on the line.
- Compare pressure and temperatureCast bodies are assessed against the 16 bar limit, stainless bodies against 40 bar.
- Select the body materialPrefer cast iron on water and condensate lines, stainless steel for aggressive media.
- Consider maintenanceOn lines needing frequent service a three piece body shortens labour time.
- Confirm the operatorIf remote operation is needed, select the top-flange model and actuator torque together.
Complementary Products
Why ORFA?
Flanged Ball Valve Types
3-Piece Flanged Cast Steel Ball Valves
3-piece flanged cast steel ball valves have a cast body, flanged ends and a three-piece design that can be opened for service.
Details →
3-Piece Flanged Stainless Steel Ball Valves
3-piece flanged stainless steel ball valves have a stainless body, flanged ends and a three-piece design that can be opened for service.
Details →
Flanged Natural Gas Ball Valves
Flanged natural gas ball valves are flanged ball valves suitable for use on natural gas lines.
Details →
Short Pattern Flanged Ball Valves
Short pattern flanged ball valves have a short body for installation in tight spaces and flanged ends.
Details →
PVC Flanged Ball Valves
PVC flanged ball valves are ball valves with a plastic body and flanged connections. Thanks to their corrosion resistance they are used in larger diameter water treatment, pool and chemical fluid lines.
Details →Flanged PVC-U Ball Valves
Flanged PVC-U ball valves are ball valves with a rigid PVC (PVC-U) body and flanged connections. They are used in larger diameter water treatment, pool and chemical fluid lines.
Details →Flanged PPRC Ball Valves
Flanged PPRC ball valves are ball valves with a PPRC body and flanged connections. They are used in larger diameter water supply and heating lines.
Details →Other Ball Valves
Actuator Compatible Ball Valves
Actuator compatible ball valves have a mounting pad that allows a pneumatic or electric actuator to be fitted directly. They are used in process, heating and water lines that require remote or automatic on-off control.
Details →
Threaded Ball Valves
Threaded ball valves connect to the pipeline with threaded ends and open or shut off the flow with a quarter turn. They are widely used in small and medium sizes in water, heating-cooling, compressed air and process installations.
Details →Get a quote for your project
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