Wafer Type Butterfly Valves
A wafer butterfly valve has a slim, lugless body that sits between two pipe flanges and is held in place by the clamping force of the flange bolts. The elastomer liner covering the body also acts as the flange gasket, so no separate gasket is needed.
The valves on this page are opened and closed by hand lever, which can be locked at intermediate positions on its notch plate. They are offered in PN16 for DN25–DN300 and PN10 for DN350–DN600, with stainless steel, nickel-plated ductile iron or aluminium bronze discs.
Main Applications
- Headers and pump suction/discharge in building services
- Zone isolation in cooling tower and chiller circuits
- Service isolation points in water distribution and treatment lines
- Seawater lines on ships and drilling plants (bronze disc type)
- Auxiliary water lines in food and chemical plants
- Manually operated isolation points in fire protection systems
Technical Data
| Connection | Wafer; clamped between two flanges with bolts |
|---|---|
| Size range | DN25–DN600, depending on model |
| Pressure class | PN16 (DN25–300) · PN10 (DN350–600) |
| PTFE-seated type | 10 bar, DN25–300 |
| Temperature | EPDM −10 / +130 °C · NBR and PTFE −10 / +80 °C |
| Stem | SS420 (DN25–300) · SS431 (DN350–600) |
| Stem end | Square; 7×7 mm (DN25–32) … 27×27 mm (DN300) |
| Operating torque (10 / 16 bar) | DN50: 15 / 16 Nm · DN100: 48 / 53 Nm · DN150: 106 / 119 Nm · DN300: 410 / 595 Nm |
| Flow (90° open) | DN50: 115 · DN100: 600 · DN150: 1,579 · DN300: 8,250 m³/h |
| Installation | Stem horizontal or vertical; horizontal recommended for DN300 |
| Operation | Lever; DN350 and above with gearbox only |
| Other operators | Gearbox, pneumatic or electric actuator (separate pages) |
Material Options
| Part | PN10 · cast iron body, stainless disc | PN16 · GG25 body, stainless disc | PN16 · GG25 body, nickel-plated disc | PN16 · ductile iron body, bronze disc |
|---|---|---|---|---|
| Body | Cast iron | Grey cast iron EN-GJL-250 (GG25) | Grey cast iron GG25 | Ductile iron EN-GJS-400-18 (GGG-40.3) |
| Disc | Stainless steel AISI 316 | Stainless steel AISI 316 | Nickel-plated ductile iron GGG-40.3 | Aluminium bronze |
| Stem | SS420 | SS420 (DN25–300) · SS431 (DN350–600) | SS420 (DN25–300) · SS431 (DN350–600) | SS420 (DN40–300) · SS431 (DN350–600) |
| Seat / liner | PTFE (−10 / +80 °C) | EPDM (−10 / +130 °C) | EPDM (−10 / +130 °C) | NBR (−10 / +80 °C) |
| Stem ring | Depending on model | Teflon | Depending on model | Teflon |
| O-ring | Depending on model | EPDM | Depending on model | NBR |
| Lever | Depending on model | Aluminium / forged iron | Depending on model | Aluminium / forged iron |
Disc and seat are chosen to suit the medium: a stainless disc for chlorinated and mildly corrosive water, a nickel-plated disc for heating and cooling circuits and an aluminium bronze disc for seawater. Choose the EPDM-seated type for hot water above 80 °C. At line ends or where the downstream side must be removed, use lug type butterfly valves.
Advantages
No Flange Gasket Needed
- The body liner seats directly on the flange face.
- Fewer gaskets and items at installation.
Slim and Light Body
- Short face-to-face length between flanges.
- Saves space in tight plant rooms.
Intermediate Locking
- The lever locks in steps on the notch plate.
- Can be used for rough flow setting.
Disc to Suit the Medium
- Stainless, nickel-plated or bronze disc.
- Different duties in the same body size.
Construction and Design Features
- Lugless wafer body centred by the flange bolts
- Elastomer or PTFE liner covering the body bore and acting as flange gasket
- Disc rotating on a one-piece stem
- Square stem end for lever or later actuator mounting
- Notched lever for locking in intermediate positions
Request a quote for lever-operated wafer butterfly valves by stating size, pressure class, medium and temperature together with the disc and seat combination.
How to Choose?
- Check the locationThe wafer body suits mid-line points between two flanges; it is not suitable for line ends.
- Select the seatNBR or PTFE up to 80 °C for cold and warm water; EPDM up to 130 °C for hot water.
- Match the disc to the mediumStainless for chlorinated water, nickel-plated for closed heating-cooling circuits, bronze for seawater.
- Lever or gearbox?Lever torque rises quickly with size, so use a geared type on large sizes; DN350 and above are geared only.
Complementary Products
Why ORFA?
Other Butterfly Valves
Double Acting Pneumatic Lug Butterfly Valves
Double acting pneumatic lug butterfly valves are lug body valves opened and closed automatically by an actuator driven by air in both directions.
Details →
Double Acting Pneumatic Wafer Butterfly Valves
Double acting pneumatic wafer butterfly valves are wafer body valves automatically controlled by an actuator driven by air in both directions.
Details →
Electric Actuated Lug Type Butterfly Valves
Electric actuated lug type butterfly valves are lug body valves opened and closed remotely by an electric actuator.
Details →
Electric Actuated Wafer Butterfly Valves
Electric actuated wafer butterfly valves are wafer body valves controlled remotely or automatically by an electric actuator.
Details →
Lug Type Butterfly Valves
Lug type butterfly valves have threaded lugs, so they can be used at line ends and one side can be dismantled.
Details →PVC-U and PPRC Butterfly Valves
PVC-U and PPRC butterfly valves have corrosion resistant plastic bodies and are used in water treatment and chemical lines.
Details →
Gear Operated Lug Type Butterfly Valves
Gear operated lug type butterfly valves are lug body valves opened and closed easily and gradually with a handwheel and gearbox.
Details →
Gear Operated Wafer Butterfly Valves
Gear operated wafer butterfly valves are wafer body valves with a handwheel and gearbox for easy operation in large sizes.
Details →
Single Acting Pneumatic Lug Butterfly Valves
Single acting pneumatic lug butterfly valves are lug body valves whose spring return actuator moves to a safe position when air fails.
Details →
Single Acting Pneumatic Wafer Butterfly Valves
Single acting pneumatic wafer butterfly valves are wafer body valves whose spring return actuator moves to a safe position when air fails.
Details →Our Wafer Type Butterfly Valves
ORFA supplies wafer type 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.
Stainless Steel Disc Wafer Butterfly Valve
Stainless steel disc wafer butterfly valve: cast iron body, AISI 316 disc, EPDM seat (NBR/Viton option), DN25–DN600, PN16/PN10, max +130 °C, TS EN 593.
Details →Nickel-Disc Wafer Butterfly Valve
Nickel-disc wafer butterfly valve: GG-25 body, nickel-plated ductile iron disc, EPDM seal, DN25–DN600, PN16/PN10, max +130 °C, TS EN 593. Economic water valve.
Details →PTFE-Sealed Wafer Butterfly Valve
PTFE-sealed wafer butterfly valve: cast iron body, AISI 316 disc, PTFE seal, DN50–DN300, PN10, max +110 °C, TS EN 593. For chemical and sanitary lines.
Details →Bronze Disc Wafer Butterfly Valve
Bronze disc wafer butterfly valve: ductile iron body, aluminium bronze disc, NBR seal, DN40–DN600, PN16 / PN10, max +90 °C, TS EN 593. For seawater and marine piping.
Details →Sanitary Stainless Steel Butterfly Valve
Sanitary stainless steel butterfly valve: all-stainless body and disc, butt-weld ends, DN25–DN125, lever and pneumatic actuator options. For food, dairy, beverage and pharmaceutical lines.
Details →Get a quote for your project
Our sales team will prepare the best solution for your needs.