Locos at Clare OH early 1900s

NW Mailing List nw-mailing-list at nwhs.org
Wed Aug 10 11:10:34 EDT 2016

The reason that N&W used boiler top check valves was for safety.  If a locomotive was involved in a wreck, there was a tendency to shear off the side boiler check and having it on top reduced that risk.

Bud Jeffries

From: NW Mailing List 
Sent: Tuesday, August 09, 2016 8:10 PM
To: NW Mailing List 
Subject: Re: Locos at Clare OH early 1900s

  I don't have any information as to whether it helped or not.
    Again, "You can read about it in the N&WHS Newsletter Vol.6, No. 1, Jan. - Feb. 1990."
 I think the practice first started in England as I have read of it being used on the "Saint" Class 4-6-0 locos around 1902. While the exact appliance may not have survived, the principle did, in that it did help preheat the water entering the boiler. And, it must have worked well enough that the N&W went almost exclusively to top mount check valves.

Jimmy Lisle

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