Hi Jesse, Photo taken & winging it's way to you. Sent twice as I was not sure that it attached to the first e-mail. regards Clif ----- Original Message ----- From: "Jesse" <fernj1@xxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Wednesday, September 26, 2012 5:35 PM Subject: [modeleng] Re: Parts prices > Clif, just for the heckofit, send me a photo of that Southworth pump. > Never heard of one and would like to see a pic. Many thanks, > > Jesse fernj1@xxxxxxxxxxxx >> Clif, >> There was one of the full-size pumps that used a shuttle valve as you >> described. >> Not sure why yours doesnt work. >> >> Never having seen or played with one, I cant offer any suggestions >> though. >> >> Alan >> >> >> On 25/09/2012 17:57, Clifton wrote: >>> Hi All, >>> >>> On Duplex pumps I have been building one of the Southworth steam feed >>> pumps, >>> the little 3" high one& it is driving me round the twist. >>> >>> On a full size pump it is usual to have a rocking arm to transpose the >>> down >>> motion at the end of the piston rods travel to an up motion of the steam >>> slide valve to make it double acting. (& vice versa at the top of the >>> stroke). This little beast uses a slide valve which via steam passages >>> operates a shuttle valve which then moves the main steam valve in the >>> opposite direction. >>> As the whole pump is only 3" high you can imagine the size of the steam >>> chest which has two slide valves& a shuttle valve in it. >>> >>> I have now spent about a week trying to get it to work including making >>> three news sets of slide valves& a new port face. I have trued to slide >>> valve faces& port face using engineers blue& as far as I can see it is >>> perfect. >>> >>> But will it go, will it heck! >>> >>> I think a bit of redesign is going to happen to get a rocking arm in. >>> >>> Regards >>> >>> Clif >>> >> MODEL ENGINEERING DISCUSSION LIST. >> >> To UNSUBSCRIBE from this list, send a blank email to, >> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject >> line. > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email to, > modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject > line. > MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.