MTS Model 286-20 Confining Pressure Intensifier - Manual (Page 32)

286.20 Pressure Intensifier 32
Operating Procedures
Operation
Filling the Pressure Intensifier From The Reservoir
Note If you are filling the pressure intensifier for the first time, perform the
procedure under heading
“Filling the Pressure Intensifier From an
External Container” on page 30. This procedure is used for normal, day-
to day use prior to pressurizing operations.
Purpose of this
procedure
The purpose of this procedure is to establish three simultaneous conditions in
preparation for pressurizing the confining fluid:
A. To fill the high pressure end of the pressure intensifier with confining
fluid.
B. To expel all air from the high pressure end of the pressure intensifier.
C. To place the pressure intensifier’s piston near the start of its
displacement range
Procedure 1. Make sure the Reservoir Fill valve is turned fully clockwise to the Close
position.
2. Open the Intensifier Fill valve a turn or two counterclockwise.
3. Turn the Confining Fluid Input valve fully clockwise to Close.
4. Configure the confining system’s controller for the displacement control
mode.
5. At the CPI’s control equipment, turn on hydraulic pressure.
6. At the displacement controller, cause the pressure intensifier’s piston rod to
slowly stroke to the lower end of it’s travel (piston fully retracted, zero
displacement position). This will draw fluid from the reservoir, into the
pressure intensifier.
7. Actuate the air-driven hydraulic pump by rotating the Fluid Transfer Pump
Control counterclockwise.
8. Watch the reservoir and note any air bubbles escaping from the intensifier.
When the air bubbles cease, set the Fluid Transfer Pump Control to the Off
position.
9. At the displacement controller, cause the pressure intensifier’s piston rod to
stroke slowly upward while observing the reservoir for air bubbles. This
action forces any air out of the intensifier lines. When air bubbles cease to
appear, stop the motion of the pressure intensifier’s piston rod.
10. At the displacement controller, cause the pressure intensifier’s piston rod to
stroke slowly downward again to about 10% of its displacement range. This
will draw fluid back into the pressure intensifier.
11. Turn the Intensifier Fill valve fully clockwise to Close.
12. Turn off hydraulic power.