Appalachian Fluid Power, Inc.

3364 State Route 31

Acme, PA 15610

Ph. 724-593-8333Fx. 724-593-8334

Horsepower for driving

a pump:

For every 1 HP of drive, the

equivalent of 1 GPM @ 1500

PSI can be produced.

Horsepower for idling a pump:

To idle a pump when it is

unloaded will require about 5%

of it full rated horsepower.

Compressibility of

hydraulic oil:

Volume reduction is approx

1/2% for every 1000 PSI of

fluid pressure.

Compressibility of water:

Volume reduction is about

1/3% for every 100 PSI of

pressure.

Wattage for heating

hydraulic oil:

Each watt will raise the temp.

of 1 gallon of oil by 1 degree

Fahrenheit per hour.

Flow velocity in hyd. lines:

Pump suction lines 2-4 fps.

Pressure lines up to 500 PSI,

10-15 fps.

Pressure lines 500-3000 PSI,

15-20 fps.

Pressure lines over 3000 PSI,

25 fps.

All oil lines in air-over-oil

systems, 4 fps.

Safe pump inlet vacuum:

Gear Pumps

3-5 PSI or 6-10 In. HG

Vane Pumps

2-3 PSI or 4-6 In. HG

Piston Pumps

2 PSI or 4 In. HG

"hydraulics and pneumatics... it's what we do"

abs - absolute

AC - alternating current

Btu - British thermal unit

C - degrees Celsius

cc - closed center

ccw - counter clockwise

cfm - cubic ft per minute

cfs - cubic ft per second

cir - cubic inches per rev.

cim - cubic inches per min.

com - Common

cpm - cycles per minute

cps - cycles per second

cw - clockwise

cyl - cylinder

DC - direct current

dia - diameter

disp - displacement

ext - external

F - degrees Fahrenheit

fl - fluid

fpm - feet per minute

ft - foot

ft-lb - foot pound

gal - gallon

gpm - gallons per minute

HP - horsepower

ID - inside diameter

in - inch

in-lb - inch pound

int - internal

ipm - inches per minute

ips - inches per second

lb - pound

NC - normally closed

NO - normally open

NPT - national pipe thread

NPTF - dryseal pipe thread

oc - open center

OD - outside diameter

P.O. - pilot operated

PSI - lb per square inch

psia - psi absolute

psig - psi gauge

r - radius

rpm - rev. per minute

rps - rev. per second

sol - solenoid

T - torque

vac - vacuum

visc - viscosity

Length - 1 inch = 25.4mm

Pressure - 1 bar = 14.5 PSI

Flow - 1 GPM = 3.79 l/min

Force - lb (f) = 4.44 N

Mass - 1 Kg = 2.2 lb (m)

Volume - 1 Gal. - 3.79 liters

Temperature - C = 5/9 (F-32)

Torque - 1 ft-lb - 1.356 Nm

Power - 1 HP = .746 kw

Frequency - 1 Hz = 1 cps

Disp. - 1 ml/rev = 0.061 cir

Other Products Available from **AFP**