Underwater Tools Depth Guideline

UNDERWATER MODELS ONLY

CAUTION

DO NOT USE HYDRAULIC TOOLS UNDER- WATER THAT ARE NOT DESIGNATED AS AN “UNDERWATER” MODEL, OR THIS WILL RESULT IN DAMAGE TO THE TOOL.

For underwater hydraulic tools the applications are broken down into four quadrants depending on type of tool and method of operation.

The types of tools are percussive and rotational, each with different characteristics allowing for dif- ferent depth operation. With percussive tools, the nitrogen accumulator PSI must counter the in- crease in ambient pressure found at lower depths. Since there is a maximum PSI for percussive tools they are limited to certain depths. Rotational tools do not have accumulators and thus capable of deeper depths.

The methods are broken into diver operated or remote operated vehicle (ROV). ROV's can reach lower depths and with an on-board hydraulic power source that is depth compensated, can operate hydraulic tools at depths of thousands of feet. ROV operation is still limited to the tool, for example a percussive tool has the same depth limitation whether ROV or diver operated.

Operation Overview

	Percussive	Rotational
	Percussive	Rotational
	Tools: Breakers,	Tools: Grinders,
	Hammer Drills and	Saws, Chain Saws
	Chipping Hammers	Max Depth: 1000' -
Diver		Max Depth: 1000' -
Diver	Max Depth: 500' -	Reference hose
	Max Depth: 500' -	Reference hose
	limitations due to	sizing guide below
	accumulator PSI
	max (increase 40
	PSI for every 100')

	Tools: Breakers,	Tools: Grinders,
	Hammer Drills and	Saws, Chain Saws
ROV	Chipping Hammers	Max Depth: 1000' -
ROV

	Max Depth: 500' -	Reference hose
	limitations due to	sizing guide below
	accumulator PSI
	max (increase 40
	PSI for every 100')

Recommended Hose Diameters

Depth (ft)	8 GPM	12 GPM
100	5/8”	5/8”
300	3/4”	1”
600	1”	1”
1000	1”	1-1/4”

20 ► SK58 User Manual