Hydraulic Hose Sizing: Difference between revisions
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Both Pressure and Return hose sizes should be increased to 3/4", as well as all couplers and fittings. | Both Pressure and Return hose sizes should be increased to 3/4", as well as all couplers and fittings. | ||
[[Category:Power Cube]] | |||
Revision as of 01:48, 16 August 2011
Hydraulic Hose Sizing
The size of the suction hose for the power cube, it is calculated from the fluid velocity in the hose. The general values used are:
- Pressure: 20 ft/sec
- Return: 15 ft/sec
- Suction: 5 ft/sec
The formula for calculating the hose size is as follows:
- V = Q / (3.117 * pi/4 * D ^ 2)
or
- D = (Q / (3.117 * pi/4 * V) ) ^ 1/2
Where:
- V is fluid velocity in ft/sec
- Q is fluid volume in gallons/min
- D is hose inside diameter in inches
In the case of the Power Cube suction hose, V = 5 ft / sec and the Q is approximately 13 GPM, so:
- D = (13 GPM / (3.117 * pi/4 * 5 ft/sec) ) ^ 1/2 = 1.03 in
The sizing guidelines say to always round up - meaning take the next size larger than 1.03 inches (probably 1 1/4").
While I thought the sizing for the pressure lines was OK, I double-checked and found the formula indicates that the supply and return hoses should be larger as well:
- D = (13 GPM / (3.117 * pi/4 * 20 ft/sec) ) ^ 1/2 = 0.515 in
Also, the return lines appear to be undersized as well:
- D = (13 / (3.117 * pi/4 * 15 ft/sec) ) ^ 1/2 = 0.595 in
Both Pressure and Return hose sizes should be increased to 3/4", as well as all couplers and fittings.