The miner's handbook : a handy book of reference on the subjects of mineral deposits, mining operations, ore dressing, etc. For the use of students and others interested in mining matters by Milne John 1850-1913

Author:Milne, John, 1850-1913
Language: eng
Format: epub
Tags: Mining engineering, Mines and mineral resources
Publisher: London : C. Lockwood and Son
Published: 1894-03-25T05:00:00+00:00

3 6

12

2 4

12

~4

For velocities of 3 feet per second.

Sl.OO 71.28

40.50 35.85

20.25 17.89

10.12 8.98

For velocities of 7 feet per second.

441 335-28

220.50 110.25

55-12

197.70

83-95 41.82

A general formula given by Merivale is

.//=head of water in feet required to overcome resistance. (7=gallons per minute. L = length of pipe in yards. Z?=diameter of pipe in inches.

Classification of Pumps. —Michell gives the following classification of steam pumps.

I. HORIZONTAL ENGINES.

A. ROTARY.

(Expansive condensing engines with connecting rod crank and fly wheel).

a. Simple steam pumps.

b. Compound steam pumps.

B. NON-ROTARY.

a. Simple steam pumps.

(Non expansive, non-condensing like the "Special").

b. Compound steam pumps. (Expansive, non-condensing).

II.

A. ROTARY.

a. Simple steam pumps.

VERTICAL ENGINES.

(Expansive non-condensing).

B. NON-ROTARY.

b. Simply steam pumps.

(Non-exjiensive, non-condens-

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