Used as general-purpose water pressure source and volume change controller.
Hydromatic standalone is a general-purpose water pressure source and volume change controller. It is driven by a stepper motor, which enables the unit to measure the volume change. The unit consists of a hydraulic piston, driven by a low friction screw and gearbox, mounted on a ball-slide, and is managed under closed-loop control by the built in data acquisition and 6” touch-screen colour control panel.
The user-friendly touch screen colour panel allows the local control of pressure showing in real time the pressures readings and the volume changes.
The control panel is mounted on an ergonomic and versatile support adjustable according the user’s preferences:
· fixed on the Hydromatic’s body
· positioned on the triaxial bench close to the testing frame
· ergonomically mounted on the loading frame column by the dedicated support (to be ordered separately).
Volume and pressure data for each line can be saved on the USB pen drive or, as alternative, the Hydromatic can be connected to a GEODATALOG 8 via LAN port and readings will be transmitted to PC with DATACOMM 2 software thus all readings will be synchronized: load cell, displacement and pore pressure transducers, volume change, etc…
Four models are available depending on:
· Maximum pressure capacity: 3500 kPa or 1700 kPa
· Number of pressure lines: one or two.
For a standard effective stress system, a double line Hydromatic is required – one for cell pressure and one for back pressure.
A typical use for a single line Hydromatic is as additional line for permeability test in soil and rock triaxial cells.
Pressure transducer(s) and de airing block(s) are included. Over-travel is prevented by built-in micro-switches.
HYDROMATIC standalone closed loop pressure/volume controller. Powers two hydraulic pressure lines and measures the associated volume changes. Max pressure: 1700 kPa. Volume capacity: 250cc.110-220V,50-60 Hz, 1ph.
HYDROMATIC standalone closed loop pressure/volume controller. Powers one hydraulic pressure line and measures the associated volume change. Max pressure: 1700 kPa. Volume capacity: 250cc. 110-220V,50-60 Hz, 1ph.
HYDROMATIC standalone closed loop pressure/volume controller. Powers two hydraulic pressure lines and measures the associated volume changes. – max pressure: 3500 kPa – volume capacity: 250cc. 110-220V,50-60 Hz, 1ph.
HYDROMATIC standalone closed loop pressure/volume controller. Powers one hydraulic pressure line and measures the associated volume change. – max pressure: 3500 kPa – volume capacity: 250cc. 110-220V,50-60 Hz, 1ph.
| Code | 28-WF43SG | 28-WF43DG | 28-WF45SG | 28-WF45DG |
| N of pressure line | One | Two | One | Two |
| Max pressure [kPa] | 1700 | 3500 | ||
| Pressure res. [kPa] | 0.1 | |||
| Volume capacity [cc] | 250 | |||
| Volume res. [cc] | 0.001 | |||
| Dimension (lxhxw) [mm] | 860x300x250 | 860x300x300 | 860x300x250 | 860x300x300 |
| Weight [kg] | 12 | 20 | 12 | 20 |
Used for providing a variable constant pressure using air compressed
Standards ASTM D7981
Bladder air/water pressure cylinders
The Bladder air/water cylinders are used to deliver pressurized water up to 1000 kPa to triaxial cells by the pressure distribution panels. The main advantages from using this apparatus are:
The cell, made from transparent acrylic tube, flanged between two light alloy discs, incorporate a rubber membrane and can operate continuously at a pressures up to 1000 kPa. The unit acts as a reservoir/interface between compressed air, used as a pressure source and water used as the pressurizing medium in the triaxial cell. The Bladder air/water cylinders have to be completed with the 28-WF4330 or 28-WF4331 two or three lines distribution panel depending on the application.
Pressure distribution panels
Two models available: 28-WF4330 for two pressure lines and 28-WF4331 for three pressure lines. They include precision air regulators, pressure outlets and quick release fittings.
They have to be completed with a digital gauge (see accessories, model 28-WF4330/2).
Used for providing a variable constant pressure using a oil/water interface
This apparatus provides an infinitely variable constant pressure using an adjustable spring type dead weight pressure feedback system connected in-line with a pump and an oil/water interchange vessel.
The apparatus comprises: hydraulic pump, honed piston/spring assembly, cylindrical oil/water interchange vessel, pressure gauge, valves, 2 kg of oil.
Dimensions: 310x300x400 mm
Weight approx.: 16 kg
Constant pressure system 3500kPa oil/water 230V/50Hz/1ph
Constant pressure system 3500 kPa oil/water 230V/60Hz/1ph
