This apparatus, originally designed for soil mechanics test applications, can also be used to provide an infinitely variable constant pressure and is used in conjunction with the Hoek cell fit with the permeability end caps, for the investigation of the permeability of rock at high confining pressure, in the laboratory. The lateral pressure can be applied with the Low friction pressure maintainer or, as alternative, with the Sercomp Rock, servo-hydraulic control console which is part of the Automatic Uniaxial and Triaxial test systems. The apparatus comprises: motorized hydraulic pump; honed piston/spring assembly; precision test gauge 0-3500 kPa range; cylindrical oil/water interchange vessel; valves; 2 kg of high viscosity oil.

Pressure range: 0 to 3500 kPa

Overall dimensions: 310x300x390 mm

Weight approx.: 16 kg.