< Fittings 1 >
<< water gauge >>
William's water gauge is too low in height. Before the water line disappears from the gauge glass, the inner firebox breaks surface of the water. So I modified upper connection of the unit to change height of the water gauge. Incidentally, I added four brass bars around the glass for protection.
Each component is made from round, square or hexagonal brass bars and silver soldered together. Light press fit before soldering is suitable for true square connection. To cut a glass tube, make a sharp groove around the tube with a fine "diamond file", snap with fingers, then remove sharp edge with the file.
Hand wheel for the blow off valve is made from a hexagon brass bar. Round bar also can be used but hexagon bar has advantage in hexagonal indexed scribing or cutting. The procedure is shown in the photos. Finished hand wheel is silver soldered onto the spindle made of stainless steel.
The glass holder is lined up with a suitable round bar.
The glass pipe is sealed with O-rings in gland nuts. The nut should be tightened only with fingers.
<< blower valve >>
Components of the blower valve. The needle valve is sealed with an O-ring.
The drain valve handle is the same as the watergauge blow off valve handle, except a square hole at the center to be held onto the spindle. The square hole was cut with a home-made square broach (see the photo) in a bench vise.
Copper tube from the blower valve is connected to a bush on the boiler backhead. The photo shows the connection which can save much space. Both the hexagonal countersink screw and the drum are hollowed out to make steam go through the connection.
I changed design of the steam turret and mounted the blower valve directly onto it, because the original blower valve on the backhead would interrupt regulator operation.
<< pressure gauge >>
I got a pressure gauge from a supplier in England. I chose 'bar' unit instead of 'psi' because the latter system is so strange for Japanese. JIS(Japanese Industrial Standard) pressure gauges have 'MPa' system.
The pressure gauge is connected to the steam turret. Note the copper tube has 'U' shaped bottom to keep condensed water which guards the pressure gauge against hot steam.
Almost of the operating gears in the cab appeared except the main item 'regulator'.