Post by jma1009 on Sept 2, 2014 10:37:16 GMT
hi roger,
there are various ways of doing these things but for a miniature globe valve where the passages in the body are drilled first at an angle i reduce the end of the spigots exact depth of the recess plus a few thou, press fit in, and the solder goes round the shoulder of the recess as can just be seen in the left hand body above. the idea being that the press fit holds everything together plus prevents the silver solder getting to the passages and mucking everything up.
for other types of fittings i do something similar but drill through the centred ends of the spigots after silver soldering, the press fitted 'pip' being removed in the process. this is the method used on the water gauges and blower valve and hydrostatic lubricator valve and which will also get used on the check valves, and ensures that the drilled through passageways can get within a few thou of the valve seats which aids quick opening etc and makes them compact. i will do a suitable drawing when i do the check valves to show this a bit clearer.
incidentally i had a look at the don young construction series for his 7.25"g terrier NEWPORT yesterday for the above injector steam valves, and don glosses over this stage! though as don sold fittings commercially i think he was rather hoping builders would be put off making the valves and instead buy them!
however roy amesbury described in some detail how to fit all the bits together for silver soldering together in ME feb 1973.
cheers,
julian
there are various ways of doing these things but for a miniature globe valve where the passages in the body are drilled first at an angle i reduce the end of the spigots exact depth of the recess plus a few thou, press fit in, and the solder goes round the shoulder of the recess as can just be seen in the left hand body above. the idea being that the press fit holds everything together plus prevents the silver solder getting to the passages and mucking everything up.
for other types of fittings i do something similar but drill through the centred ends of the spigots after silver soldering, the press fitted 'pip' being removed in the process. this is the method used on the water gauges and blower valve and hydrostatic lubricator valve and which will also get used on the check valves, and ensures that the drilled through passageways can get within a few thou of the valve seats which aids quick opening etc and makes them compact. i will do a suitable drawing when i do the check valves to show this a bit clearer.
incidentally i had a look at the don young construction series for his 7.25"g terrier NEWPORT yesterday for the above injector steam valves, and don glosses over this stage! though as don sold fittings commercially i think he was rather hoping builders would be put off making the valves and instead buy them!
however roy amesbury described in some detail how to fit all the bits together for silver soldering together in ME feb 1973.
cheers,
julian