» Fisher™ · Control Valves
High-Performance Butterfly Valves
High-performance butterfly valves for effective, economical throttling in large lines and high temperatures — with the Fisher™ Control-Disk™ design extending the control range to rival a segmented ball.
- Rotary · double-offset disk
- Linear through 90° rotation
- Best value in large sizes & high temp
- Control-Disk™ flagship
What it is
High-Performance Butterfly Valves
A high-performance butterfly valve controls flow with a disk that rotates 90° in the body. Double-offset (high-performance) mounting cams the disk away from the seal as soon as it begins to open, minimizing seal wear and giving tight shutoff — a clear step beyond a conventional butterfly. The result is effective throttling with a roughly linear characteristic through the full rotation.
Its advantage is value at scale. In large sizes and high temperatures, a high-performance butterfly costs far less than a comparable ball or globe valve while still controlling well, which is why it dominates big, general-service lines. The trade-off is a narrower control range — roughly a third that of a ball or globe valve — so careful sizing matters, and it performs best on steady process loads.
The Fisher™ Control-Disk™ valve closes much of that gap. Its characterized contour expands the control range toward that of a segmented ball valve, delivering expanded control and lower process variability in a compact wafer or lugged body, sizes NPS 2–36, with soft (Class VI) or metal (Class IV) seals.
How it works
Construction & trim
The disk sits on a double- (or triple-) offset shaft, so rotation lifts it off the seal almost immediately — the rubbing that wears a centered butterfly disk is largely eliminated, which preserves shutoff and extends seal life. Through 90° of travel the valve presents a roughly linear inherent characteristic.
Because the usable control range is narrower than a globe or ball valve, sizing is where these valves are won or lost: size for the real operating envelope, not a single point, and lean on characterized-disk designs like the Control-Disk™ where wider rangeability is needed. Soft or metal seats set the shutoff class for the service.
Fisher™ Control-Disk™ (flagship)
Characterized disk for expanded control and lower process variability — rangeability to ~100:1, wafer or lugged, NPS 2–36, CL150–600.
Double-offset disk
An offset shaft cams the disk off the seal as it opens, minimizing seal wear and preserving tight shutoff.
Soft or metal seats
Soft seals for tight Class VI shutoff; metal seals (Class IV) for high temperature and abrasion resistance.
Wafer or lugged
Compact wafer or lugged bodies that mate to standard raised-face flanges, saving space and weight in large lines.
Common applications
Where high-performance butterfly valves fit
- Large-diameter, general-service throttling where ball or globe valves are uneconomical
- High-temperature service well suited to a rugged metal-seated butterfly
- Steady process-load duties that don't demand precision throttling
- Expanded-control applications where a characterized Control-Disk™ rivals a segmented ball
- On/off and isolation duty needing tight, low-cost shutoff in big lines
Why it's chosen
- Best capacity and value per dollar in large sizes and high temperatures
- Double-offset disk minimizes seal wear and holds tight shutoff
- Compact, lightweight wafer/lugged body mates to standard flanges
- Control-Disk™ characterized design expands rangeability toward a segmented ball
Worth weighing
- Narrower control range (~⅓ of ball/globe) — size carefully and favor steady loads
- For precision throttling or severe erosive service, a globe or eccentric plug valve may fit better
Genuine OEM
Genuine spare parts for high-performance butterfly valves
Disks, seals and seats, shafts, bearings, packing and seal kits — the genuine OEM rotary internals that keep a high-performance butterfly valve sealing tight, low-wear and characterized to its design.
A will-fit look-alike can quietly undermine control, shutoff and emissions compliance — genuine OEM parts protect the design the valve was built to.
Resources & tools
Size it, look it up, learn the engineering
The guides and free tools behind every high-performance butterfly valves decision — from sizing to finding the replacement for a discontinued unit.
Sizing guide
How to Size a Control Valve
A practical, step-by-step walkthrough of valve sizing and selection — service conditions, Cv, pressure drop, characteristic and severe-service checks. Grounded in the Fisher™ Control Valve Handbook.
Read the guide →Download
Fisher™ Control-Disk™ Valve (PDF)
Fisher™ selection guide — body styles, sizes, materials and trim to match the valve to your service.
Download PDF →Download
Fisher™ Rotary Valve Selection Guide (PDF)
Fisher™ selection guide — body styles, sizes, materials and trim to match the valve to your service.
Download PDF →Free tool
Valve Flow & Cv/Kv Calculator
Estimate flow, pressure drop or the required flow coefficient for liquids, gas and steam. Open the calculator and unlock it on its page.
Open the calculator →Free tool
Fisher™ Obsolete & Inactive Lookup
Running a discontinued Fisher™ valve, actuator or instrument? Find its recommended replacement, then ask us about genuine OEM spare parts.
Look it up →Technical library
Handbooks & application guides
The Fisher™ Control Valve Handbook and our application guides — the reference material behind every sizing and selection decision.
Browse the library →Send us a serial number, model or service and our team will identify and quote the right Fisher™ high-performance butterfly valve or parts.
Need high-performance butterfly valves or parts?
Send us the serial number or model — genuine OEM, shipped from our Orlando, FL warehouse.