Vintage Ohio Injector Co Handwheel Valve - What is this?

[boutiquebn]

Does anyone know what this item is called?  Made by Ohio Injector Co. Cast Iron. Thank you!

[25kenwood]

Maybe an early locomotive steam injector?:

https://www.alamy.com/locomotive-engineering-a-practical-journal-of-railway-motive-power-and-rolling...

[boutiquebn]

Thank you!