The hydraulic system is used for charging three accumulators simultaneously in underground mining equipment. The system works with special fluid recommended for mine safety. Once the pressure required in the charged accumulator is reached, the dump valve carries over the fluid into the secondary circuit and the accumulator goes into use. Once the accumulator gets discharged, the pump again charges it by diverting oil from the auxiliary to the accumulator. The manifold is made from SG Iron and withstands pressure of about 350 bar and flows of 100 lpm.

These are two pump systems where one pump unloads as the pressure increases over predetermined value allowing reduced power consumption. The circuit consists of three valves; the Relief valve checks the maximum pressure of the smaller pump, the unloading valve dumps the flow to tank when predetermined pressure is reached and the check valve prevents the high pressure pump from leaking into the low pressure pump. Tucson manufactures these in various types and flow capacities. Typical uses are Hydraulic Presses, Plastic Machinery and machine tools.

Safety Blocks contain a ball type shut off valve used to isolate the accumulator during servicing. A drain valve (either a Mechanical drain or an electrical drain or a combination thereof) is used to empty the oil from the accumulator. A Relief valve protects the accumulator in case of a pressure surge due to radiating heat when the main shut off is closed. Tucson manufacture state of art safety blocks which are supplied to one of the leading international companies. Typical applications include steel mills.

Rapid Slow systems are used where there is a need for a rapid traverse speed and a controlled feed speed. A solenoid poppet valve switches between the feed speed, which is controlled by a pressure compensated flow regulator and the rapid speed, which is provided by passing flow over a check valve. Flows in the return direction are allowed to pass unrestricted. These systems are most often used on machine tools and moulding machines that need a certain curing feed advance.

The system is mounted on the framework of the stacker/scissor lift. When the pump is switched on, the Check Valve holds the load in place at which point the pump can be switched off. To lower the valve, the Solenoid Valve is energized which opens the flow of oil to tank. The rate of lowering is adjusted by means of a Flow Control Valve. The inbuilt Relief Valve provides protection in case of a rise in pressure. Solenoid valves are available with a manual override function to lower the platform in case of power failure.