Pumps and Hydraulics, Part 2 (of 2)

by N. Hawkins

Fig. 446.

Table.

Diameter of Steam Cylinders	Diameter of Water Plunger	Length of Stroke	Gallons Per Revolution	Revolutions per Minute	Gallons per Minute
14	81⁄2	10	9.56	54	516
16	81⁄2	10	9.56	54	516
181⁄2	81⁄2	10	9.56	54	516
16	101⁄4	10	13.95	54	753
181⁄2	101⁄4	10	13.95	54	753
181⁄2	12	10	19.16	54	1035
20	12	10	19.16	54	1035
17	81⁄2	15	14.14	40	565
20	81⁄2	15	14.14	40	565
17	101⁄4	15	20.83	40	833
20	101⁄4	15	20.83	40	833
20	12	15	28.78	40	1151
Diameter of Steam Cylinders	Diameter of Water Plunger	Length of Stroke	Sizes of pipes for Short Lengths To be increased as length increases
			Steam Pipe	Exhaust Pipe	Suction Pipe	Delivery Pipe
14	81⁄2	10	21⁄2	3	8	6
16	81⁄2	10	21⁄2	3	8	6
181⁄2	81⁄2	10	3	31⁄2	8	6
16	101⁄4	10	21⁄2	3	10	8
181⁄2	101⁄4	10	3	31⁄2	10	8
181⁄2	12	10	4	31⁄2	12	10
20	12	10	21⁄2	5	12	10
17	81⁄2	15	4	31⁄2	8	6
20	81⁄2	15	21⁄2	5	8	6
17	101⁄4	15	4	31⁄2	10	8
20	101⁄4	15	4	5	10	8
20	12	15	5	5	12	10
Diameter of Steam Cylinders	Diameter of Water Plunger	Length of Stroke	Approximate Space Occupied Feet and Inches
			Length		Width
14	81⁄2	10	9 8		3 2
16	81⁄2	10	9 9		3 10
181⁄2	81⁄2	10	9 10		4 0
16	101⁄4	10	10 9		3 10
181⁄2	101⁄4	10	10 9		4 0
181⁄2	12	10	11 1		4 0
20	12	10	11 2		4 2
17	81⁄2	15	10 5		3 11
20	81⁄2	15	10 6		4 2
17	101⁄4	15	11 6		3 11
20	101⁄4	15	11 8		4 11⁄2
20	12	15	11 9		4 3

The Worthington Pressure Pump. This pump, presented in Fig. [446], is specially designed for use in connection with hydraulic lifts and cranes, cotton presses, testing machines, hydraulic riveting and punching machines and hydraulic presses of all kinds. Also, for oil-pipe lines, mining purposes and services requiring the delivery of liquids under heavy pressures.

There are four, single-acting, outside-packed plungers, which work through the ends of the water cylinders, the latter having central partitions. The arrangement of compound steam cylinders shown in Fig. [445], or a triple expansion arrangement, can be applied to these pumps where a saving of fuel is desired. The water valves are easily accessible and are contained in small independent chambers, capable of resisting very heavy pressure.

MARINE PUMPS.

These are made both horizontal and vertical; the prime consideration being in all cases the amount of floor space the pump will require. This is especially true in reference to small steam vessels, pleasure craft, etc.

Owing to the unusual corrosion, caused by galvanic action, salt and various impurities, marine pumps are built of iron with brass linings, but frequently with the entire water ends of bronze.

The arrangement of the water valves in the most approved forms of vertical pumps is such that the pistons are always submerged, and the water valves sealed, thereby securing immediate lift of water through the suction pipe, and steady, quiet operation of the pump; many horizontal pumps of the ordinary duplex design are also used on shipboard.