Fig. 308.
Straightway hose valves for the proper number of streams are placed in the neck to a very large discharge chamber, and there is also a large discharge opening for connection to the system of hydrants and sprinklers.
A stroke pointer is attached which travels between graduations marked on the yoke, indicating the length of stroke which pump travels, a one-point sight feed cylinder lubricator, a capacity plate with enamelled face giving instructions for operating, etc., is attached to each machine.
SPECIFICATIONS
OF THE
National Board of Fire Underwriters
FOR THE MANUFACTURE OF
STEAM FIRE PUMPS
AS RECOMMENDED BY THE
National Fire Protection Association.
EDITION OF 1904
THE NATIONAL STANDARD PUMP.
This pump is merely a pump of the well-known “duplex” type, built in a very substantial manner, and with certain improvements suggested by the experience of inspectors with Fire Pumps.
The principal points of difference between the National Standard Pump and the ordinary commercial pump are:
1st. Its steam ports and water passages and air chamber are made much larger than in common trade pumps, so that a larger volume of water can be delivered in an emergency without water hammer.