The safety valve body was drilled out and finished off with the seat tool.
The exterior body was profiled and tried with the shroud. Fits well. My final idea will have an O-ring to make the shroud a tighter fit on the valve so it doesn't come off so easily.
It was set up in the rotary table to mill the 1" hex on the base.
The plunger was made as are a couple of spares in the event too much is machined off the OD of the plunger. The aim is to achieve a minimal pressure drop between open and close and that is controlled by the diameter of the plunger.
The spindle and plunger were threaded a tight 3BA and silver soldered for security. The OD of the plunger was machined after soldering.
Happy steaming!
Nigel
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