The Semi-Automatic (Motorized) Power Pack, controlled by a pressure rate control valve is designed to supply the required oil to the load frames for loading. The power pack can load different frames with required pace rates. A pump is supplied as standard. The power pack is equipped with a safety valve (maximum pressure valve) to avoid machine overloading. Maximum working pressure of the system is 400 bar.

The dual stage pump is formed by two groups;

1. Low pressure gear pump

2. High pressure radial piston pump

On the dual stage pump, a high delivery, low pressure gear pump is used for rapid approach, while a low delivery, high pressure radial piston pump is used for test execution. The rapid approach facility shortens the time interval from piston start until the upper platen touches to the specimen. This excellent feature helps to save a lot of time when a large number of specimens are going to be tested.

The motor which drives the pump in an AC motor.

A distribution block is used to control the oil flow direction supplied by the pump. and unloading process and pace rate adjustment is done from the arms on the distribution block. The following parts are fitted to the distribution block; Safety valve (max. pressure valve) and Transducer.

The natek range of Semi-Automatic Machines can be upgraded with option High Precision Pressure Transducer special calibration Class 1 starting from 1% of the full range.

This unique performance enables the machines to be used for a considerable number of applications including:

• Early age (2 or 3 days) compression strength tests

• Flexural and splitting tests by using proper accessories

• Mortar (Cement) compression tests by using proper accessories

• Core Testing

The tank includes enough oil to fill the mechanism which pushes the ram during the test. The level and oil temperature can be seen on the indicator fitted to the tank. It has 15 L capacity. Hydraulic motor oil, number 46, must be used.

The Digital Readout Unit has been designed to use with load cells or pressure transducers on different material test applications.

The peak value and the load change during the test are displayed on the screen.

• Peak hold property

• Easy preload zeroing

• 5 Digits

• Multi-point Calibration