|
| Pressure Loss due to height - Telescoping Wand Application |
It takes pressure to lift water to a height, so if a spray gun is at a higher elevation than the outlet of the pressure washer, a modest amount of pressure is lost in lifting the water. The chart below gives the amount of pressure loss and it is independent of system pressure, flow rate and hose size.
| Elevation of Gun Above Pressire Washer (in FT) |
Pressure Loss due to Elevation (in PSI) |
0 |
0 |
10 |
4 |
20 |
9 |
30 |
13 |
40 |
17 |
50 |
22 |
100 |
43 |
200 |
87 |
|
| Hose Pressure Loss (per 100 ft of Hose) |
The pressure loss is determined by the total amount of water flow produced by the pressure washer. Pressure loss does not depend on the operating pressure of the unit. The chart below presents the measurement of 100 FT long hose. The pressure loss for other hose lengths is calculated proportionally to that length (100FT). For instance, 50 FT of hose will have 1/2 of the amount of loss and 200 FT of hose will have double the loss of the amount shown in the chart. There are several other factors that may cause pressure loss such as hose liner ID tolerance, hose inner liner smoothness, manner in which the hose is laid out during use, type of fittings on each end, and sometimes the temperature of the water. Pressure loss will also decrease if the hose is positioned up hill. However, these factors are not as essential and were not taken into consideration in these calculations.
WATER FLOW GPM |
HOSE INSIDE DIAMETER, INCHES
|
|
5/16" |
3/8" |
1/2" |
1 |
54 PSI |
20 PSI |
7 PSI |
2 PSI |
2 |
180 PSI |
60 PSI |
25 PSI |
6 PSI |
3 |
380 PSI |
120 PSI |
50 PSI |
13 PSI |
4 |
- |
220 PSI |
90 PSI |
24 PSI |
5 |
- |
320 PSI |
130 PSI |
34 PSI |
6 |
- |
- |
220 PSI |
52 PSI |
8 |
- |
- |
300 PSI |
80 PSI |
10 |
- |
- |
- |
120 PSI |
|
| Pipe Pressure Loss |
The values in the chart below present the approximate calculations since the pipe pressure loss can be affected by other factors, including water temperature, pipe ID tolerance, type of fittings, and pipe inner wall smoothness. In addition, schedule 40 and schedule 80 pipes have different IDs and, therefore, different pressure losses.
WATER FLOW GPM |
PRESSURE LOSS, PSI
|
|
1/2" PVC PIPE |
1 |
1
|
1
|
2 |
4
|
4
|
3 |
8 |
9
|
4 |
14
|
15
|
5 |
21
|
23
|
6 |
30
|
32
|
8 |
52
|
56
|
10 |
80
|
87 |
If you have any questions regarding hose and pipe pressure loss calculations please call our Customer Service Line at Toll Free 866-858-4982 or send us an email at: info@ultimatewasher.com
|
| Friction Loss in Pipe Fittings in Equivalent Feet of Pipe |
| FITTING |
FITTING SIZE |
| |
1/2" |
3/4" |
1" |
1-1/4" |
1-1/2" |
2" |
2-1/2" |
| 90° Std Elbow |
1.6 |
2.1 |
2.6 |
3.5 |
4 |
5.5 |
6.2 |
| 90° Long Elbow |
1 |
1.4 |
1.7 |
2.3 |
2.7 |
4.3 |
5.1 |
| 90° Street Elbow |
3 |
3.4 |
4.4 |
5.8 |
6.7 |
8.6 |
10.3 |
| 45° Std Elbow |
0.8 |
1.1 |
1.4 |
1.8 |
2.1 |
2.8 |
3.3 |
| 45° Street Elbow |
1 |
1.8 |
2.3 |
3 |
3.5 |
4.5 |
5.4 |
| Square Elbow |
3 |
3.9 |
5 |
6.5 |
7.6 |
9.8 |
11.7 |
| Std Tee Straight Run |
1 |
1.4 |
1.7 |
2.3 |
2.7 |
4.3 |
5.1 |
| Std Tee Branch Run |
4 |
5.1 |
6 |
6.9 |
8.1 |
12 |
14.3 |
| Gate Valve - Full Open |
0.7 |
0.9 |
1.1 |
1.5 |
1.7 |
2.2 |
2.7 |
|
| Helpful Conversions |
Volume & Weight
| Gal |
X |
3.785 |
= Liters |
| Gal |
X |
128 |
= Ounces |
| Gal |
X |
231 |
= Cubic Inches |
| Gal |
X |
8.3453 |
= Pounds |
| Ltr |
X |
61.02 |
= Cubic Inches |
| Ltr |
X |
33.82 |
= Ounces |
| Ltr |
X |
.2642 |
= Gallons |
| Ltr |
X |
1000 |
= CM2 |
| ML (CC) |
X |
.0338 |
= Ounces |
| Gram |
X |
.03527 |
= Ounces |
| PSI |
X |
.0689 |
= Bar |
| Bar |
X |
14.5 |
= PSI |
| In. HG |
X |
.4912 |
= PSI |
| In. H2O |
X |
.8226 |
= In. HG |
Horsepower
GPM x PSI
1457 |
= Elec. Brake HP |
GPM x PSI
1714 |
= Hydraulic HP |
GPM x PSI
1100 |
= Gasoline HP (industrial grade) |
GPM x PSI
900 |
= Gasoline HP (standard grade) |
|
Can we improve something on this page?
Can this page be improved? Is the information complete and easy to understand? We are always looking to improve our website, so please feel free to give us your comments, suggestions, or questions. Thanks for helping us serve you better!
|
|
|
