If the shotcrete air compressor is operating at 60 psi with a hose length of 100 feet or less, what pressure should it be raised to for 250 feet of hose length?

To determine the appropriate pressure setting for a shotcrete air compressor when extending the hose length from 100 feet to 250 feet, it's essential to understand the pressure loss associated with longer hose runs.

When increasing the hose length, there is typically a need to compensate for the additional pressure drop due to friction and resistance in the hose. The general industry guideline is to increase the pressure by approximately 5 psi for every additional 100 feet of hose.

In this case, when extending the hose from 100 feet to 250 feet, you are effectively adding 150 feet of hose, amounting to one additional segment of 100 feet and an extra 50 feet. Following this guideline, the pressure should be raised to mitigate the pressure drop along the longer distance.

Starting with the original operating pressure of 60 psi:

• To cover the first additional 100 feet, increase by 5 psi to reach 65 psi.

• For the next 50 feet, while specific adjustments may vary, it is common practice to add an additional increment (although less than a full 5 psi) to account for the increased resistance.

So, the total recommended increase would suggest bumping the pressure up to approximately 75 psi for that extra length,