Bareshaft Pump
11
OPERATION
Recommended Equipment
Jetstream equips the waterblast units with the com-
ponents they recommend for safe operation. Those
components include:
• Pressure Gauge
• Two Rupture Disc Assemblies
• Bypass Valve or Regulator Valve
• Discharge Quick Disconnect Coupling.
ATTENTION
Installation of two rupture discs is required by
Jetstream for warranty coverage on this pump.
One rupture disc must be rated at 120% of the
uid end stamped pressure rating. The other
disc must be rated at 140% of the uid end
stamped pressure rating.
Keep a supply of rupture discs on hand for oper-
ation at different pressures and for replacement
in the event of a rupture.
WARNING
!
Do not operate the engine without water in the
system. Damage to the charge pump will occur.
ATTENTION
A quick disconnect coupling is an important
means of protecting the manifold from wear at
the high pressure discharge hose connection
port. If the internal threads on the manifold
become worn or damaged the cost to repair
them is far greater than replacing a coupling.
The manifold would need to be shipped back
to Jetstream for repair or replacement.
Hose and Water Supply
Requirements
– The water supply hose inside diameter must
be large enough to supply 150% of the unit’s
maximum ow requirements.
– The inside diameter of the high pressure
discharge hose will be determined by the
necessary length of hose and the amount of
ow passing through the hose length. Contact
your Jetstream representative for proper hose
sizing.
– Supply pressure must be no greater than 150
psi (10.3 bar) into the waer tank. If pressure
exceeds 150 psi (10.3 bar), install a pressure
regulator large enough to meet ow require-
ments. Regulators are available from Jet-
stream.
– Water temperature 125°F maximum.
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