MTS Model 286-30 Pore Pressure Intensifier - Manual (Page 32)

286.30 Pressure Intensifier 32
Operating Procedures
Operation
Filling the Pressure Intensifier
It is necessary to perform this procedure only when the pore pressure end of the
pressure intensifier contains air rather than pore fluid, for example, when using
the PPI for the first time, or after overhaul or maintenance has been performed on
the pressure intensifier. The figure shown at the end of this procedure shows the
sequence of actions described in the procedure.
During the course of normal day-to-day operating procedures the pore fluid end
of the pressure intensifier will always be filled with pore fluid, to the extent
allowed by the current displacement (position) of its piston, assuming faulty
operating procedures have not sucked air into the pressure intensifier.
Note During this procedure the PPI will be operated under closed-loop control.
Because of the large variety of electronic controller equipment in use,
explicit instructions cannot be provided for some steps. Refer to the
system operation manual.
Purpose of this
procedure:
This procedure establishes three simultaneous conditions in preparation for
pressurizing the pore fluid: it fills the high pressure end of the pressure intensifier
with pore fluid, it expels all air from the high pressure end of the pressure
intensifier, and positions the pressure intensifier’s piston near the start of its
stroke range.
Preliminary steps or
conditions:
• The reservoir is three-fourths full of pore fluid.
• The Reservoir Drain/Fill valve is fully closed.
• The Pore Fluid Input valve is closed.
• Hydraulic power (from the external hydraulic power supply) is not applied
to the PPI at this time.
Hydraulic power will be applied during this procedure. Conditions that can
be hazardous to life and equipment can exist on all systems or equipment
that are connected to the same hydraulic power source.
Before turning on hydraulic power, make sure that all systems or equipment that
use the same hydraulic power source are in an appropriate condition before you
turn on hydraulic power.
Make certain no one is performing work on other systems or equipment that share
the same hydraulic power source as the PPI. If people are working on other
systems or equipment, inform them that you intend to turn on hydraulic power.
Inform other people in the vicinity that you are about to turn on hydraulic power.
WARNING