Emerson Daniel 700 Series Technical Manual page 13

Technical Guide
DAN-LIQ-TG-44-rev0813
November 2013
0 psi
10 psi
PUMP
Spring force is 50 pounds.
0 psi
5 psi
PUMP
Pump pressure is 5 psi.
Available force equals:
Area x Pressure equals 10 sq.
in. x 5 psi equals 50 pounds. The spring
force is equal to the pressure and area.
The power cylinder will not move.
Spring force is 100
pounds (compressed).
The area is 10 sq. in.
10 sq. in.
The pump pressure required equals
the spring force divided by area, equals
100 pounds divided by 10 sq. in equals
10 psi for full stroke.
Figure 2-2
The area is 10 sq. in.
10 sq. in.
To start the cylinder moving,
minimum pump pressure
required must be more than
5 psi.
Figure 2-3
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