Fisher
Official website: www.emerson.com ↗Fisher is the brand most engineers picture when they hear “control valve.” Founded by William Fisher in 1880 in Marshalltown, Iowa, the company built its name on pneumatic control for early oil fields and grew into the reference line for throttling valves across the process industries. Today Fisher sits inside Emerson’s final control portfolio, and its naming conventions — Easy-e actuators, Whisper trims, FIELDVUE instruments — have become the de facto vocabulary of the industry.
The product logic is a matched stack: globe bodies (ET, EWT, EWH) for general to severe liquid duty, the V150 Vee-Ball for rotary throttling duty, Easy-e spring-and-cylinder actuators sized to the valve, and a trim menu that addresses the two classic enemies of a control valve — aerodynamic noise (Whisper Trim) and cavitation damage (Cavatrol). DVC digital positioners close the loop and stream diagnostics, making Fisher one of the earliest mainstream lines to treat the positioner as a diagnostic instrument rather than a pneumatic amplifier.
Representative product lines
| Series | Type | Notes |
|---|---|---|
| ET / EWT / EWH | Globe | The general-purpose reference globe line, from standard to severe service with cage-guided trims |
| V150 Vee-Ball | Segmented ball | Rotary throttling with high capacity and a wide rangeability envelope |
| Easy-e | Actuators | Spring-and-pneumatic-cylinder actuators factory-matched to the valve thrust requirement |
| Whisper Trim / Cavatrol | Trims | Drilled-hole low-noise cages and anti-cavitation trim stages |
| DVC / FIELDVUE | Positioners | Digital valve controllers with HART diagnostics — the modern default |
Where they fit
Refining, petrochemical, LNG and gas processing, power, pulp and paper — Fisher’s installed base makes it the comparison point in nearly every control-valve specification.