3. Prevention of loss from open drains, drips, tanks, etc.
4. Maintaining higher pressure in long lines of piping, in jackets, driers, etc.
5. Enabling engines to start promptly.
6. Saving steam systems from water, thereby reducing liability to accident.
BOILER MAKERS’ TOOLS AND MACHINERY.
Fig. 156.
[Fig. 156] represents a pair of jack screws. These are invaluable devices for use in boiler-shops, and also in establishments where ponderous machinery has to be shifted or otherwise handled.