MTS Model 286-20 Confining Pressure Intensifier - Manual (Page 13)

286.20 Pressure Intensifier Introduction 13
Introduction
This section describes the Model 286.20 Confining Pressure Intensifier (CPI), its
role in the typical rock mechanics test system and other system components
typically used with the Confining Pressure Intensifier. Specifications and
dimensions are also included.
The Model 286.20 Confining Pressure Intensifier is designed to provide a source
of fluid at pressures suitable for use in the confining pressure chamber of a
triaxial cell. The CPI is used to fill the triaxial cell with confining fluid,
pressurize the fluid, control the pressure, and empty the fluid from the triaxial
cell at the conclusion of a test.
Some model versions produce confining pressures up to 140 MPa (20,000 psi).
When connected to a fluid-filled triaxial cell, the maximum fluid volume that can
flow during pressurization of the external device and its specimen can be as high
as 1300 cubic centimeters (80 cubic inches). See
“Specifications and
Dimensions” on page 18 for specifications for all models.
Triaxial Cell
Open Close Confining Fluid Input
Open Close
Confining Fluid Output
Open Close
Reservoir Fill
Fluid Reservoir
Open Close
Intensifier Fill
Pressure Intensifier
Low Pressure Relief
Pressure Transducer
Low pressure line High pressure line
286.20
Confining Pressure Intensifier
r
Fluid Filter
Off
Fluid Transfer Pump Control
Air supply in 100 psi max.
Air Driven Hydraulic Pump
Fluid Direction A
B
C
C
A
B Empty Reservoir
From fluid supply or to empty fluid
Fill system from fluid supply using pump
Fill system from reservoir using pump
Confining Pressure
A B
A
B
Air Direction
Air supply into empty traxial cell.
Bleed air into reservoir when filling triaxial cell.
psi bar
High Pressure Relief
Air Pressure Relief
815
Fluid
Resivoir
Control
Panel