Articoli correlati a Fire Protection Handbook
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 Excerpt: ...plant is at Niagara Falls where unusually reliable electric current supply is available. b--A and B are one stage 65 Ibs., 1,350 gals, per minute centrifugal pumps, normally supplying the domestic system which is separate from the fire system. Fig. 51. Model Centrifugal Pump Installation. c--C is two stage 130 Ibs., 1,350 gals. Underwriters' pump reserved for fire duty. d--All pumps draft from a reservoir which is filled by gravity line from river. Priming connections from city main and from domestic system are not shown. e--In case C cannot supply enough water, A and B are thrown in series by closing valves 10,12, and 15 and by opening ii. f--Domestic pressure is ordinarily on fire system through valve 14. g--Valve i is emergency fill connection for reservoir. h--Valve 4 is ordinarily closed, but if opened, in conjunction with operation of valves 5 and 6, city main can be used to feed domestic system while A and B feed fire system,, or feed fire system, or both systems at the same time, i--Valves I, 4, and n are ordinarily closed, j--Valves 2, 7, 9, are required to permit check valve repairs and cleaning without affecting the balance of the system, k--All valves are O S and Y type, in plain sight in fireproof pump room. 157. The important point is that, with almost no additional expense, it is possible through putting domestic pumps in series to secure a high pressure water supply. NATIONAL BOARD RULES (Edition of 1915) 158. The following extracts from the regulations of the National Board of Fire Underwriters for the installation of Centrifugal Fire Pumps are reproduced as being of general interest. The commercial centrifugal pumps now in use for various purposes are of such different types and so often are weak in construction details, have small water p...
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- EditoreRarebooksclub.com
- Data di pubblicazione2012
- ISBN 10 1231149299
- ISBN 13 9781231149294
- RilegaturaCopertina flessibile
- Numero di pagine200
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