|
PIPE THREADS |
| SIZE |
THREADS PER INCH |
APPROX. THREAD DIAM |
| NPT |
Outside |
Inside |
| 1/8 |
27 |
.41 |
.19 |
| 1/4 |
18 |
.55 |
.28 |
| 3/8 |
18 |
.67 |
.42 |
| 1/2 |
14 |
.84 |
.53 |
| 3/4 |
14 |
1.0 |
.97 |
| 1" |
11 1/2 |
1.31 |
1.22 |
| 1 1/4 |
11 1/2 |
1.66 |
1.25 |
| 1 1/2 |
11 1/2 |
1.90 |
1.50 |
| 2" |
11 1/2 |
2.38 |
1.94 | |
|
STRAIGHT THREAD FITTING SIZES JIC - SAE - O-RING THREADS |
| SIZE NO. |
THREAD SIZE |
TUBE O.D. |
THREAD DIAMETER |
| |
|
|
Outside |
Inside |
| 2 |
5/16-24 |
1/8 |
.31 |
|
| 3 |
3/8-24 |
3/16 |
.38 |
|
| 4 |
7/16-20 |
1/4 |
.44 |
.37 |
| 5 |
1/2-20 |
5/16 |
.50 |
.41 |
| 6 |
9/16-18 |
3/8 |
.56 |
.47 |
| 8 |
3/4-16 |
1/2 |
.75 |
.66 |
| 10 |
7/8-14 |
5/8 |
.88 |
.77 |
| 12 |
1 1/16-12 |
3/4 |
1.06 |
.94 |
| 14 |
1 3/16-12 |
7/8 |
1.19 |
1.06 |
| 16 |
1 5/16-12 |
1" |
1.31 |
1.13 |
| 20 |
1 5/8-12 |
1 1/4 |
1.63 |
1.50 |
| 24 |
1 7/8-12 |
1 1/2 |
1.88 |
1.75 |
| 32 |
2 1/2-12 |
2" |
2.50 |
2.38 | |
|
FLOW CAPACITIES OF HYDRAULIC LINES
Recommended Maximum for PRESSURE LINES
(Based on Velocity of 20 Ft/Sec)
| HOSE SIZE |
FLOW - GPM |
PIPE SIZE |
FLOW - GPM |
| 1/4" |
3.5 |
1/4" |
6.5 |
| 3/8" |
7 |
3/8" |
12 |
| 1/2" |
12 |
1/2" |
19 |
| 3/4" |
27 |
3/4" |
33 |
| 1" |
48 |
1" |
56 |
| 1 1/4" |
75 |
1 1/4" |
93 | |
|
Recommended Maximum for SUCTION LINES
(Based on Velocity of 5 Ft/Sec)
|
Suction Hose or Pipe Size |
Flow - GPM |
|
1/2" |
3 |
|
3/4" |
7 |
|
1" |
12 |
|
1 1/4" |
19 |
|
1 1/2" |
27 |
|
2" |
45 |
|
2 1/2" |
62 |
|
3" |
100 | |
| Increase size if: |
• Oil Viscosity exceeds 150 SSU (SAE 10)
• Oil is cold
• Suction lines are over 5 ft. long
• Pressure lines are over 15 ft. long
• There are multiple fittings or obstructions in line | |
|
HYDRAULIC CALCULATIONS
|
|
Cylinder |
Force (lbs) |
= pr2 x PSI |
|
Volume (gal) |
=pr2 x length ÷ 231 |
|
Speed (In per min) |
=GPM ÷ Vol | |
|
Pump |
Hp input required |
PSI x GPM x .0007 |
|
Hp rule of thumb |
1 Hp = 1 GPM at 1500 PSI |
|
Flow (GPM) |
RPM x Displ ÷ 231 | |
