Electrically Cum Hand Operated Pumping Unit
This is a separate console housing an oil tank, electric motor, relay etc.
Inside the oil tank are mounted two pumps which are worked with the help of a cam rotating inside the tank.
The cam is rotated by the electrical motor and belt.
Above the tank is fitted a hand pump.
All plungers are accurately machined and no oil seals are used.
Special non-return valves are fitted in the pumping system for trouble free long service,
A dip stick is provided to know the oil level in the tank.
A drain to remove oil is fitted at the base of the tank.
The pumping unit has on its front panel a slow-fast lever to control the rate of loading,
a release valve and a slit to enable a rod to be inserted in the hand pump to operate the pumping unit manually.
A pressure gauge is fitted in front at a convenient angle.
The pressure gauge has 200 divisions for its full capacity,
Inside the pressure gauge is fitted a micro switch.
This micro swich automatically cuts off electrical supply to the pumping unit on reaching full capacity of the pressure gauge.
A red dummy pointer is fixed on the cover glass of the pressure gauge to record maximum load at the failure of the specimen.
The pumping unit works on 230 volts A.C. or 415 volts, 3 phase supply.
This pumping unit is connected to the load frame by means of pressure pipes.
Additional pressure gauges (maximum 2 Nos.) of lower capacities with isolation valves can be fitted on the pumping unit.
Note:
Digital versions of electrically operated Compression Testing Machines can also be supplied.
The digital versions have 0.5% accuracy.
Various Models of Compression Testing Machines are available listed in the following table.
