Masoneilan
Official website: www.bakerhughes.com ↗Masoneilan traces to William Mason’s 1882 valve work in the United States, and the brand has spent more than a century as one of the two or three names that define the globe control valve. Now part of Baker Hughes, it remains a fixture of refining and petrochemical main lines, where its 3200 and 35002 series globe bodies are specified generation after generation.
Masoneilan’s identity is deep cage-guided globe engineering: rugged bodies, multistage low-noise trims for high-pressure gas and steam letdown, and actuation built around the VarPak diaphragm family. The SVI II AP digital positioner, with its stiff feedback loop and partial-stroke testing, is one of the most deployed smart positioners in refining. Where Fisher defines the general vocabulary, Masoneilan is the engineer’s choice for demanding hydrocarbon service with a conservative, proven trim catalogue.
Representative product lines
| Series | Type | Notes |
|---|---|---|
| 3200 Series | Globe | The classic cage-guided workhorse for liquid and gas duty |
| 35002 Series | Globe | Heavy-duty severe-service globe platform for refining main lines |
| VarPak | Actuators | Diaphragm actuator family sized across the globe range |
| SVI II AP | Positioners | Smart digital positioner with HART, diagnostics and partial-stroke test |
| Low-noise trims | Trims | Multistage diffusion trims for high-ΔP gas and steam letdown |
Where they fit
Refining, petrochemical, gas processing and power — anywhere a conservative, multistage-trim globe solution is the safe specification.