The American Society of Mechanical Engineers

ANGUS—IM PRO VED T EC H N IQ U E FO R C E N T R IFU G A L -PU M P-E FFIC IE N C Y M EA SU R EM EN TS 17
F ig . 4 E l e c t r i c a l I n s t r u m e n t s U s e d i n T e s t s
(T he card s ta te s th a t th e te s t w as on filtered -w ater p u m p N o. 4; c a p a c ity (25,000,000 im p gal) 30,000,000 g al p e r 24 h r; p h o to g ra p h ta k e n on n ig h t
of A ug. 2, an d desig n ated as te s t 4 D . T h e re is no b lu rrin g of th e needles on th e o rig in al film .)
T A B L E 2
E X T R A C T S F R O M T W O T Y P IC A L L O G S H E E T S
R eference
W a ttm e te r
P ressu re,
in.
S u ctio n
lift,
in.
D ifferen tial
on
v e n tu ri m eter, D is c h a n
no. read in g m e rcu ry w ate r in. w ate r v alv e
R a w -w a te r pump®
0 .7 3 8
6 3 .5 2 6 .0 102.4
, 0 .7 3 7 6 3 .6 2 6 .0 1 0 2 .5
1 0 .7 3 0 6 3 .9 2 6 .0 102.8
w ide
open
0 .7 3 5 6 3 .3 2 6 .5 1 0 4 .6
f 0 .7 3 2 6 7 .5 2 8 .5 9 1 .8
9 0 .7 4 0 6 7 .6 2 7 .5 9 3 .2 p a rtly
z 0 .7 3 8 68.0 2 6 .0 9 0 .7 closed
1 0 .7 3 0 6 7 .1 2 5 .5 9 2 .2
0 .7 1 8 7 4 .5 1 6 .5 6 9 .3
q J 0 .7 1 0 7 5 .1 1 5 .8 6 8 .4 p a rtly
6 1 0 .7 1 0 7 5 .0 1 5 .5 6 7 .5 closed
[ 0 .7 1 0 7 5 .0 1 5 .0 6 7 .8
H ig h -p ressu re pum pft
0 .7 4 3 2 5 2 .1 . . . 6 9 .2 5
0 .7 3 8 2 5 0 .2 6 8 .7 5
0 .7 4 8 2 5 2 .0 6 8 .7 2 w ide
4 0 .7 4 0 2 5 3 .3 68.20 o pen
0 .7 3 8 251.1 6 8 .5 0
0 .7 4 0 2 5 1 .7 6 9 .2 5
0 .7 2 0 2 6 3 .2 5 8 .3 5
0 .7 2 2 2 6 3 .2 5 7 .8 0
- 0 .7 2 0 2 6 3 .3 5 8 .7 0 p a rtly
a 0 .7 2 0 2 6 2 .0 5 7 .9 0 closed
0 .7 2 5 2 6 3 .5 5 8 .7 3
0 .7 2 0 2 6 3 .3 5 8 .5 5
0 .6 5 2 2 8 3 .8 3 6 .6 5
A 0 .6 5 5 2 8 3 .5 3 7 .0 5 p a rtly
b 0 .6 5 2 2 8 3 .8 3 6 .9 0 closed
0 .6 5 4 2 8 3 .7 3 7 .3 0
° S u ctio n re a d sep ara te ly .
N e t p ressu re d ire c tly ta k e n .