NATIONAL STANDARD PUMP SIZES.

Pump Sizes.Ratio
of
Piston
Areas.
Capacity
At 100 lbs.
at Pump.
Steam.Water.Stroke.AboutNumber of
118 in.
Streams.
Nominal
Gals.
per
Minute.
Actual
Gals. per
Min. as per
Art. 4.
14 × 7 × 124 to 1Two 5004830
14 × 714 × 12 520
16 × 9 × 123 to 1Three 7508060
18 × 20 × 123 to 1Four10009990
1812 × 1014 × 121050
20 × 12 × 16234 to 1Six15001655

NATIONAL STANDARD PUMP SIZES.(continuation)

Pump Sizes.[B] Boiler
Power
Required
Full Speed.
Steam.Water.Stroke.Horse
Power.
Steam
Pres.
at Pump,
lbs.
Rev.
Per
Minute.
Piston
Travel
Feet Per
Minute.
14 × 7 × 121004070140
14 × 714 × 12
16 × 9 × 121154570140
18 × 20 × 121504570140
1812 × 1014 × 12
20 × 12 × 162005060160