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.
Single Stage Pump
The single stage pump is formed by;
High pressure pump
On the single stage pump, high pressure pump is used for test execution.
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. Loading 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.
High Precision Pressure Transducer
TheNatek 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.
Digital Readout Unit
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 value hold property
• Easy preload zeroing
• 5 Digits
• Multi-point Calibration
• Maximum pressure valves to avoid machine overloading
• Piston travel limit switch
• Emergency stop button