The NERAIL New England Railroad Photo Archive
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Backhead showing steam injector and very long site glass with tri-cocks.

Photographed by Rich Currie, November 3, 2006.
Added to the photo archive by Rich Currie, November 12, 2006.
Railroad: Mt. Washington Cog Railway.

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Visitor Comments about this Photo:

That is a Hancock two-stage injector. The handle starts and stops the boiler feed injector which delivers whatever the lower injector lifts. The lower injector is the valve wheel under the handle. There is a cast DOT on the wheel so a person can regain a particular setting. So the injector can be throttled to deliver a constant replenishment to the boiler as opposed to shots of cold water from time to time as with a single stage injector.

Posted by Steven Hall on 2016-07-20 14:55:23

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