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6 inch butterfly valves are quarter-turn industrial valves designed for isolating, throttling, and automating flow in NPS 6 / DN150 piping systems. They are widely used in wastewater systems, water treatment, chemical processing, HVAC utilities, pump isolation, and industrial plant service where compact installation and practical automation are required.
BPC supplies 6 inch butterfly valves in wafer, lugged, high-performance, and automated configurations — available with manual, pneumatic, and electric actuation for demanding industrial and utility service.
A 6 inch butterfly valve is a rotary flow control valve installed in NPS 6 piping systems, corresponding to DN150 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.
| Valve Position | Disc Orientation | System Effect |
|---|---|---|
| Fully Open | Parallel to flow | Maximum flow through valve |
| Partially Open | Angled in flow path | Flow throttling |
| Fully Closed | Perpendicular to flow | Shutoff against seat |
Wafer — Compact installation between ANSI or DIN flanges using through-bolts. Meets ANSI B16.10 / ISO 5752 narrow face-to-face. Lowest installed weight and space requirement.
Lugged — Threaded inserts allow independent bolting to each flange, supporting dead-end service and downstream maintenance without full line shutdown.
High-Performance — Double-offset or triple-offset disc geometry for elevated pressure ratings, tighter shutoff, and demanding industrial or chemical service applications.
Automated — Pneumatic or electric actuator packages with ISO 5211 direct-mount interface for remote operation, PLC integration, and process sequencing.
| Parameter | Specification |
|---|---|
| Nominal Size | NPS 6 / DN150 |
| 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; per applicable ASTM standards |
| Disc Material | Ductile Iron, 316 Stainless Steel |
| Seat / Liner | EPDM, NBR, Viton (FKM), PTFE |
| Stem Material | 316 Stainless Steel |
| Actuator Mounting | ISO 5211 Direct Mount |
| Operation | 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 |
|---|---|---|
| Wastewater Systems | Isolation and bypass | Corrosion resistance, seat compatibility |
| Cooling Water | Utility flow control | Automation compatibility |
| Pump Isolation | Equipment maintenance | Pressure surge handling |
| Chemical Processing | Process isolation | Seat and disc material compatibility |
| HVAC Systems | Chilled water shutoff | Low torque, NSF certification |
| Bulk Utility Lines | Plant service isolation | Lug-style for dead-end service |
BPC’s applications team can confirm material selection, actuator sizing, and flange compatibility for your system.
| Valve Type | Best Fit | Main Advantage | Main Limitation |
|---|---|---|---|
| Butterfly Valve | Compact utility isolation | Fast quarter-turn, automation-ready | Disc remains in flow path |
| Ball Valve | Tight shutoff | Full-port, low pressure drop | Higher cost and weight at large sizes |
| Gate Valve | Full-bore isolation | Low restriction when open | Slow operation, larger footprint |
| 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 |
6 inch butterfly valves are widely used in wastewater infrastructure because they combine compact ANSI B16.10 face-to-face dimensions with corrosion-resistant seat and disc material options and straightforward actuator integration. At DN150 sizing, they deliver reliable shutoff and isolation with lower installed weight than gate valve alternatives — making them well-suited for pump stations, bypass lines, and treatment plant piping.
Yes. Butterfly valves can be installed in horizontal, vertical, or angled orientations. Installation orientation should account for actuator access, stem position relative to the flow stream, and any solids or sediment in the process media that could affect disc seating.
Yes. They are widely used in HVAC and utility water systems because of their compact design, low operating torque, and simple actuator integration. EPDM-seated configurations are standard for chilled water service; NSF-certified configurations are available where potable water compliance is required.
Actuator sizing depends on line pressure, pressure differential at shutoff, seat material torque requirements, and required fail position. At NPS 6 / DN150, pneumatic and electric actuators are both practical options. BPC provides actuator sizing support for all automated valve configurations.
Yes, provided seat, disc, and body materials are selected for the specific process media and temperature. Viton (FKM) or PTFE-lined configurations are common for chemical service. Material conformance to applicable ASTM standards should be confirmed for regulated or critical process applications.
The most common causes are incorrect seat or disc material selection for the process media, cavitation from excessive pressure differential, pressure surge or water hammer events, and excessive cycle frequency beyond the valve’s rated service life. Proper valve sizing and material specification at the outset significantly extends service life.
BPC supplies industrial butterfly valves to wastewater systems, process facilities, HVAC utilities, chemical processing plants, and industrial operations. Our 6 inch butterfly valve inventory includes wafer, lugged, high-performance, and automated configurations with manual 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.
6 inch butterfly valves provide reliable, compact, and automation-ready flow control for NPS 6 / DN150 industrial piping. Selecting the correct valve requires evaluating pressure rating, seat material, body style, Cv requirements, and actuation. BPC supports industrial butterfly valve applications with configurations engineered for demanding process and utility service.
