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3 inch butterfly valves are compact quarter-turn industrial valves designed for isolating, throttling, and automating flow in NPS 3 / DN80 piping systems. They are widely used in water treatment, chemical processing, HVAC, OEM skid packages, compressed air systems, and general industrial applications where fast operation, minimal installation space, and automation compatibility are required.
BPC supplies 3 inch butterfly valves in wafer, lugged, stainless steel, and high-pressure configurations — available with manual lever, gear, pneumatic, and electric actuation for demanding industrial and utility service.
A 3 inch butterfly valve is a rotary flow control valve installed in NPS 3 piping systems, corresponding to DN80 metric sizing under ISO and DIN standards. The valve operates through a rotating disc mounted on a central shaft. A 90-degree disc rotation moves the valve between fully open and fully closed, providing fast, automation-ready shutoff with a compact face-to-face footprint per ANSI B16.10 / ISO 5752 narrow face-to-face dimensions. Intermediate disc positions may be used for throttling where process conditions allow.
| Valve Position | Disc Orientation | System Effect |
|---|---|---|
| Fully Open | Parallel to flow | Maximum flow through valve |
| Partially Open | Angled in flow path | Flow throttling or regulation |
| Fully Closed | Perpendicular to flow | Shutoff against valve seat |
Wafer — Compact installation between ANSI or DIN flanges using through-bolts. Meets ANSI B16.10 / ISO 5752 narrow face-to-face. Lightweight and economical for HVAC, utility water, OEM skids, and general process isolation.
Lugged — Threaded inserts allow independent bolting to each flange, supporting dead-end service and downstream maintenance without full line shutdown. Preferred where pipe sections may need removal or equipment isolation is required.
Stainless Steel — 316 stainless steel body and disc for corrosion resistance, washdown compatibility, and chemical resistance in food utility, pharmaceutical support, water treatment, and aggressive process environments.
High-Pressure — Double-offset or triple-offset disc geometry for elevated operating pressures, pressure spikes, and demanding cycling conditions that exceed standard resilient-seated valve capabilities. Configure a High-Pressure Valve →
| Parameter | Specification |
|---|---|
| Nominal Size | NPS 3 / DN80 |
| Face-to-Face | Per ANSI B16.10 / ISO 5752 Narrow |
| Flange Drilling | ANSI B16.5 Class 150 / Class 300; DIN PN10 / PN16 |
| Pressure Rating | 150 PSI / 10 Bar at 70°F (21°C), Non-Shock |
| Temperature Range | -4°F to 250°F (-20°C to 121°C) depending on seat material |
| Cv Flow Coefficient | [Value] at full open |
| Body Material | Ductile Iron, 316 Stainless Steel; per applicable ASTM standards |
| Disc Material | Ductile Iron, 316 Stainless Steel, Coated Alloy |
| Seat / Liner | EPDM, NBR, Viton (FKM), PTFE |
| Stem Material | 316 Stainless Steel |
| Actuator Mounting | ISO 5211 Direct Mount |
| Operation | Lever, Gear Operator, Pneumatic Actuator, Electric Actuator |
| Certifications | NSF/ANSI/CAN 61 (potable water configurations) |
| Warranty | [X]-Year Limited Warranty |
| Origin | Manufactured in [USA / country of origin] |
| Application | Typical Function | Key Selection Consideration |
|---|---|---|
| Water Treatment | Isolation and utility flow control | NSF certification, seat compatibility |
| HVAC Systems | Cooling and heating water control | Low torque, automation compatibility |
| Pump Isolation | Suction or discharge shutoff | Pressure surge handling |
| Chemical Transfer | Isolation and batch handling | PTFE lining or Viton seat compatibility |
| OEM Equipment | Automated shutoff packages | Compact footprint, ISO 5211 interface |
| Compressed Air Systems | Isolation service | Pressure rating, seal material wear |
BPC’s applications team can confirm material selection, actuator sizing, and flange compatibility for your system. Contact an Applications Specialist →
| Valve Type | Best Fit | Main Advantage | Main Limitation |
|---|---|---|---|
| Butterfly Valve | Compact isolation and automation | Lightweight, fast operation, low cost | Disc remains in flow path |
| Ball Valve | Tight shutoff and full-port flow | Minimal pressure drop | Larger body at higher flow rates |
| Gate Valve | Full-bore isolation | Low restriction when open | Slow multi-turn operation |
| Globe Valve | Precision throttling | Better control accuracy | Higher pressure drop |
| Pinch Valve | Abrasive slurry handling | Sleeve isolation from process | Application-specific limits |
| Valve Size | Metric Equivalent | Typical Applications |
|---|---|---|
| 3 Inch | DN80 | OEM skids, utility piping, HVAC |
| 4 Inch | DN100 | HVAC, process water, plant utilities |
| 6 Inch | DN150 | Wastewater and plant utilities |
| 8 Inch | DN200 | Municipal and industrial piping |
| 10 Inch | DN250 | Large-diameter process and utility mains |
3 inch butterfly valves are used for isolation, throttling, and automated shutoff in NPS 3 / DN80 piping systems handling water, utilities, chemicals, HVAC fluids, compressed air, and industrial process media. At this size, they are particularly common on OEM skid packages and utility sub-mains where compact installation footprint and automation compatibility are priorities.
Yes. 3 inch butterfly valves can be installed in vertical, horizontal, or angled piping orientations. Actuator position, stem orientation relative to the flow stream, and any solids or sediment in the process media should be considered when selecting installation orientation.
Yes. Their compact ANSI B16.10 face-to-face dimensions, low installed weight, and ISO 5211 actuator interface make them a practical choice for packaged systems and skid-mounted equipment where space, weight, and automation integration are design constraints.
3 inch butterfly valves are used in water treatment, HVAC, chemical processing, manufacturing, food utility systems, pharmaceutical support utilities, compressed air systems, and industrial automation applications. The availability of stainless steel body configurations and NSF-certified seat options makes them adaptable across regulated and general industrial environments.
Yes, when the seat and body materials are rated for the operating pressure and compatible with the air quality conditions, including any oil mist, condensate, or treatment chemicals present. Pressure rating and seal wear under cycling conditions should be confirmed for the specific compressed air application.
Routine inspection of seats, actuator hardware, stem seals, and flange connections helps maintain reliable operation and extend service life. Proper material selection for the process media at the time of specification is the most effective way to minimize maintenance frequency and reduce premature wear.
BPC supplies industrial butterfly valves to water treatment facilities, HVAC systems, OEM equipment manufacturers, chemical processing plants, and industrial utilities. Our 3 inch butterfly valve inventory includes wafer, lugged, stainless steel, and high-pressure configurations with manual lever, gear, pneumatic, and electric actuator options — backed by a [X]-year warranty and supported by an applications engineering team experienced in valve sizing and industrial specification.
3 inch butterfly valves provide compact, reliable, and automation-ready flow control for NPS 3 / DN80 industrial piping systems. Selecting the correct valve requires evaluating body style, pressure rating, seat and disc material compatibility, Cv requirements, and actuation method. BPC supports industrial butterfly valve applications with configurations engineered for demanding process and utility service.
