20 ► SK58
User Manual
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”
UNDERWATER MODELS ONLY
Do not use hydraulic tools underwater 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 diff erent characteristics
allowing for diff erent depth operation. With
percussive tools, the nitrogen accumulator
PSI must counter the increase 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 are 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 onboard
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
DIVER
Tools: Breakers,
Hammer Drills and
Chipping Hammers
Max Depth: 500’ -
limitations due to
accumulator PSI
max (increase 40
PSI for every 100’)
Tools: Grinders,
Saws, Chain Saws
Max Depth: 1000’
- Reference hose
sizing guide below
ROV
Tools: Breakers,
Hammer Drills and
Chipping Hammers
Max Depth: 500’ -
limitations due to
accumulator PSI
max (increase 40
PSI for every 100’)
Tools: Grinders,
Saws, Chain Saws
Max Depth: 1000’
- Reference hose
sizing guide below
UNDERWATER TOOLS DEPTH GUIDELINE
