MTS Model 286-20 Confining Pressure Intensifier - Manual (Page 30)

286.20 Pressure Intensifier 30
Operating Procedures
Operation
Filling the Pressure Intensifier From an External Container
Note This procedure is used only when filling the pressure intensifier for the
first time. It is used after filling the reservoir for the first time and it
purpose is to establish operating fluid levels in the CPI.
For filling the pressure intensifier during daily operation of the CPI, see
“Filling the Pressure Intensifier From The Reservoir” on page 32.
Purpose of this
procedure
If the CPI’s pressure intensifier is being filled for the first time, it may be
desirable to fill it from an external fluid container, as described here, to avoid
lowering the level of fluid in the reservoir, especially when the volumetric
displacement rating of the pressure intensifier is 980 cm
3 (60 in. 3 ), or 1300 cm 3
(80 in. 3 ), or more.
This procedure fills the pressure intensifier only to the extent allowed by the
position of the pressure intensifier’s piston rod. For example, if the pressure
intensifier’s piston is at mid-stroke, the volume of fluid the pressure intensifier
will be able to contain is approximately half the pressure intensifier’s volumetric
rating. But, the procedure will expel all air from the pressure intensifier and fill
the available space with confining fluid.
“Filling the Pressure Intensifier From
The Reservoir” on page 32 describes how to fully fill the pressure intensifier
from the reservoir prior to pressurizing operations.
Note The fluid used must be a recommended type (see Specifications) and
the same as any fluid currently in the CPI. (Don’t mix fluid types.)
Preliminary steps
A. Connect a filler hose between the connector on the lower side of the
Fluid Direction valve (rear side of control panel) and the external fluid
container. Immerse the container end of the hose in the fluid.
B. Connect a source of clean, dry compressed air to the quick-disconnect
connector on the Fluid Transfer Pump Control (rear of control panel).
Required pressure is 90 psi (0.7 MPa).
Procedure 1. Turn the Reservoir Fill valve fully clockwise to the Close position.
2. Turn the Confining Fluid Input valve fully clockwise to the Close position.
3. Turn the Fluid Direction valve to the “C” position.
4. Open the Intensifier Fill valve a turn or two counterclockwise.
5. Turn the Fluid Transfer Pump Control counterclockwise just enough to run
the air-driven hydraulic pump at low speed.
6. Watch for air bubbles to stop and/or an increase of fluid level in the
reservoir. When the reservoir fluid level starts to increase beyond its
previous level, turn the Fluid Transfer Pump Control fully clockwise to Off.
7. Put the Fluid Direction valve in the “A” position.
8. Turn the Fluid Transfer Pump Control counterclockwise a turn or two to run
the air-driven pump.
9. When no more bubbles are seen the entering the reservoir, turn the Fluid
Transfer Pump Control fully clockwise to the Off position.
10. Turn the Intensifier Fill valve fully clockwise to the Close position.