GCTS offers two solutions for controlling the pressures required for triaxial tests on rock specimens. For pressure control during soil testing, click here.
The ePVC Series of Standalone Pressure / Volume Controllers provide independent control of hydraulic pressure or flow for a variety of applications. These controllers are electromechanical and only require standard 100‐240 VAC, 50/60 Hz power for operation ‐ no hydraulic power is needed. GCTS offers pressure/volume controllers rated for ultra high pressure up to 1 GPa (150,000 psi)!
They are capable of closed‐loop servo‐control of the pressure or volume and feature a large volume capacity and stroke with a direct, integrated transducer for precise volume measurements. This is done to prevent control errors caused by gear backlash commonly found in other systems that use a motor encoder. The ePVC includes interface programs for PC or mobile devices (iOS, Android and Windows) to remotely set pressures or flow rates. Multiple units can be linked through our CATS software for simultaneous control as required by triaxial, hydro‐fracturing, creep, and other testing applications. All models can be upgraded with continuous flow capabilities with no recharge pause. This allows for true continuous flow with no pressure spikes.
The HPVC Hydraulic Pressure / Volume Controllers are ideal for control of the confining pressure in triaxial tests, head pressure in permeability tests, or fluid pressure in hydro-fracture tests. These intensifiers can also be used to measure flow in permeability tests and volume change in triaxial tests while applying prescribed pressures. Together with a GCTS digital servo controller and triaxial software, it allows the performance of more advanced tests such as stress/strain path control. These units include a large reservoir, reservoir level and fluid flow indicators, analogue pressure gauge, and necessary valves to simplify all operations. All these components are housed within a metal cabinet with casters. GCTS also offers dual piston intensifier models for tests where continuous flow is required.
Download the ePVC Series PDF Brochure
Download the HPVC Series PDF Brochure