| Designation | Boiler feed pump |
| Bore | 1/2 inch |
| Stroke | 3/4 inch |
| Configuration | Steam pump |
| Extra equipment | Drain cocks Displacement lubricator |
| Taps required | 5, 7, 8 BA 5/32, 3/16 x 40 tpi 5/16, 7/16 x 26 tpi |
| Notes | An interesting engine, direct-coupled to a boiler feed pump.
It's basically a conventional slide valve cylinder block, with the piston
rod connected direct to the pump piston. The valve rod is shuttled back
and forth by the gunmetal Y-piece on the piston rod, reversing the
direction of the piston as it goes. they pump well from 10 strokes a
minute upwards, Stuart recommend a maximum rate of 200 strokes per minute.
This engine needs good workmanship to get it to work well - the "flywheel-less" configuration is not forgiving of tight glands or out of line spindles. About half the ones I get in will never work, half of the remaining run but don't pump effectively, the remaining few actually work nicely! These pumps do need a displacement lubricator if used for boiler feed work. |
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