Early top mount double check valve

NW Mailing List nw-mailing-list at nwhs.org
Tue Dec 20 12:36:21 EST 2011

Don't forget to look in Locomotive Cyclopeadias for these valves.
Presumably you will need the earlier versions to find the early check valve
designs and suppliers.

Gary Rolih

From: nw-mailing-list-bounces at nwhs.org
[mailto:nw-mailing-list-bounces at nwhs.org] On Behalf Of NW Mailing List
Sent: Tuesday, December 20, 2011 7:53 AM
To: NW Mailing List
Subject: Re: Early top mount double check valve

The only possibilities I found in the database for drawings are:



Based on the drawing description, neither is for the check valve itself, but
they may be close enough to get a reference number on the drawing for the

Dave Stephenson


From: NW Mailing List <nw-mailing-list at nwhs.org>
To: NW Mailing List <nw-mailing-list at nwhs.org>
Sent: Sunday, December 18, 2011 9:42 AM
Subject: Early top mount double check valve

Many of N&W's early version locos (E2, M, M2, K1, K2, K3, Z1) used a top
mount double check valve where the pipes entered the valve body from the
rear, rather than the sides.

Would anyone know who made this valve? Has anyone ran across a drawing of
this style of check valve in the archives?

Jimmy Lisle

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