High Pressure and Temperature Butterfly Valves
The butterfly valves in this group are made with an ASTM A216 WCB cast steel body instead of grey or ductile iron, designed to API 609 and installed between ASME Class 150 flanges. A steel body is more resistant to shock, vibration and high line pressure than cast iron bodies.
The disc is CF8M stainless casting equivalent to AISI 316 and the stem is AISI 410 stainless steel; sealing is provided by an EPDM seat lining the body, which limits the operating temperature to −10 / +120 °C. For steam and gas lines at higher temperatures, metal-seated types are considered separately depending on model.
Main Applications
- Industrial water distribution main lines
- Seawater lines on ships and drilling plants
- Process water and waste water in mining plants
- Fire-fighting water lines
- Heating, cooling and HVAC circulation circuits
Technical Data
| Design standard | API 609 |
|---|---|
| Pressure class | ASME Class 150 |
| Sizes | DN40 (1 1/2″) … DN400 (16″) |
| Connection type | Wafer, lug, flanged |
| Body | ASTM A216 WCB cast steel |
| Disc | ASTM A351 CF8M (AISI 316) |
| Seat | EPDM, −10 / +120 °C |
| Body width (L) | 33 mm (DN40) · 52.1 mm (DN100) · 80.6 mm (DN200) · 76.9 mm (DN300) |
| Flange bolt circle | 98.4 mm (DN40) … 539.8 mm (DN400) |
| Number of holes | 4 (DN40–DN80) · 8 (DN100–DN200) · 12 (DN250–DN400) |
| Operation | Lever, gearbox, single / double acting pneumatic, electric |
| Gearbox | Recommended for all sizes; gearbox only from DN350 |
Material Options
| Part | Class 150 · cast steel WCB body |
|---|---|
| Body | ASTM A216 WCB |
| Disc | ASTM A351 CF8M |
| Shaft | ASTM A276 410 |
| Seat | EPDM |
| Bush | FRP (glass fibre reinforced plastic) |
| O-ring | NBR |
| Lever | Cast iron |
Mind the temperature: Although the steel body increases pressure and shock resistance, the continuous temperature must not exceed 120 °C because of the EPDM seat; this type should not be used on steam and superheated water lines. When absorbing vibration at pump outlets with rubber expansion joints, make sure the disc does not strike the joint face.
Advantages
Steel Body
- WCB cast steel body.
- More resistant to shock and vibration than cast iron.
Stainless Disc
- CF8M disc and AISI 410 stem.
- Corrosion resistance in seawater and waste water.
Compact Design
- 33–86.5 mm body width on wafer types.
- Takes little space between flanges.
Low Pressure Drop
- The thin disc stays in the flow path.
- Saves pumping energy.
Ready for Automation
- Can be fitted with pneumatic and electric actuators.
- Remote opening and closing.
Construction and Design Features
- EPDM seat lining the body, which also acts as the flange gasket
- One-piece CF8M disc and AISI 410 stem
- FRP stem bushes and NBR o-ring stem seal
- Wafer, lug and flanged body options
- Top flange for lever, gearbox or actuator
Send the size, connection type, medium, temperature and type of operation through the Request a Quote form; we will prepare the steel-body butterfly valve together with its gearbox or actuator.
How to Choose?
- Check the temperatureMake sure the continuous operating temperature is below 120 °C.
- Choose the connection typeSelect wafer, lug or flanged according to end-of-line use and removal needs.
- Define the operationA gearbox is mandatory from DN350 and also recommended for small sizes.
- Match the flangesMake sure the mating flange covers the full seat face.
- Install correctlyTighten the bolts crosswise and check that the disc turns freely.
Complementary Products
Why ORFA?
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Details →Our High Pressure and Temperature Butterfly Valves
ORFA supplies high pressure and temperature butterfly valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
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