Description
The Fisher Control-Disk Rotary Valve is a rotary throttling control valve (high-performance butterfly style) built for large flow capacity with a compact installed footprint. Its characterized Control-Disk design delivers an equal-percentage style control response, helping the valve regulate smoothly across a wider throttling range—especially useful when you’re trying to keep a stable setpoint through normal process disturbances.
Key Features
•Characterized Control-Disk design with equal-percentage flow characteristic for smoother control
•High flow capacity + compact footprint for crowded piping and skid layouts
•Multiple end styles for easy piping match: Wafer / Lugged / Flanged / Single Flanged / Double Flanged
•Optional shutoff performance: FCI 70-2 Class IV / Class VI (configuration dependent)
•Typical compliance/options available (configuration dependent): SIL capable, NACE, ATEX, PED, CRN, Fugitive Emissions, Fire-Safe

Fisher Control-Disk Rotary Valve
Specifications
| Specifications | Details |
|---|---|
| Certifications / Options | SIL capable, PED, CRN, Fugitive Emission, NACE, ATEX, CUTR, Fire Safe (config-dependent) |
| Service | General Service |
| Flow Characteristic | Equal Percentage |
| Materials | Carbon Steel, Stainless Steel, Alloy (by body/trim) |
| Operating Temperature | Standard Temperature, High Temperature (by construction) |
| Pressure Class | PN, ASME (by model) |
| Process Connection Type | Flanged, Single Flanged, Double Flanged, Lugged, Wafer |
| Shutoff Class | FCI 70-2 Class IV / Class VI (config-dependent) |
| Valve Size | NPS 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24 |
| Valve Size Standard | NPS, DN |
Selection Guide
To avoid back-and-forth and lock the right build quickly, please share:
1.Valve size (NPS/DN)
2.Pressure rating (PN or ASME Class)
3.End style (Wafer / Lugged / Double Flanged / Flanged)
4.Body/trim material (CS / SS / Alloy)
5.Shutoff requirement (Class IV or Class VI)
6.If it’s a replacement: send a nameplate photo/tag (this is usually the quickest way)
Applications
•General throttling control where you want large flow capacity and a small footprint
•Replacement / retrofit for existing rotary valves (turnaround & maintenance jobs)
•Reseller and stock supply: common sizes and end styles for faster delivery cycles
Project Support
•Fast configuration matching by nameplate / tag / site photos
•Assistance confirming critical items: size, rating, end style, material, shutoff class
•Export support on request: packing, marking, and standard shipping documents
FAQ
Q1: What does “Control-Disk” mean in practical terms?
A: It refers to a characterized disk design that helps deliver an equal-percentage control response and improved throttling range.
Q2: How do I choose Wafer vs Lugged vs Double Flanged?
A: It depends on your piping standard and maintenance preference—send your line spec and we’ll recommend the correct end style.
Q3: Can you quote if I don’t have a full part number?
A: Yes—send the 5 selection points above or a nameplate photo, and we’ll build the right configuration.
Contact CTA
For a clean, fast quotation, send: Size + Class + End Style + Material + Shutoff Class.
If it’s for replacement, just send a nameplate photo—we’ll do the matching first.

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