3G three screw pump suction stop valve should be fully open in case of starting to prevent overload or suction air. Although the 3G three-screw pump with dry suction capacity, but must prevent dry rotation, so as not to scratch the work surface. If the pump needs to be started with very low oil temperature or high viscosity, it should be started with the suction valve and by-pass valve fully open to minimize the load when starting the pump. Until the prime mover reaches the rated speed, Bypass valve gradually closed. When the by-pass valve is opened, the liquid is circulated and circulated in the pump under the condition of throttling, and the more the circulating oil is, the longer the circulating time is, the more severe the heat of the liquid is, and even the pump factor High temperature deformation and damage, we must pay attention. Operation 3G three screw pump must be set in accordance with the direction of operation to produce a certain suction row. Pump work, should pay attention to check the pressure, temperature and mechanical seal work. Shaft seal should allow a trace of leakage, such as leakage does not exceed 20-30 seconds / drop, then that normal. If the pump is noisy at work, it is often caused by too low an oil temperature, too high a viscosity of the fluid, air entering the fluid, loss of coupling, or excessive wear on the pump. Parking pump stop, you should first close the discharge stop valve, and stop the pump fully stop after suction stop valve. Screw pump due to the larger working screw length, poor rigidity, easily lead to bending, resulting in abnormal work. Shaft connection must be well centered; the best work is to be carried out after the installation of positioning, so as not to cause deformation of the pipeline implicated; connection pipe should be independently fixed, as far as possible to reduce the implication of the pump. In addition, the spare screw, the best preserved in the use of hanging fixed method to avoid distortion caused by uneven placement of the third century BC, Archimedes invented the spiral rod, the water can be smooth and continuous to a few meters high , The principle is still used by modern screw pump.
A pneumatic hydraulic jack is a mechanical device that uses air pressure to generate force and lift heavy objects. It cosists of a cylinder and filled with compressed air, a piston that moves up and down inside the cylinder, and a hydraulic system that converts the air pressure into hydrauli force. When the jack is activated, the compressed air pushes the piston, which in turn pushes hydraulic fluid through a series of valves and pipes, creating a force that lifts the load. The jack is commonly used in automotive and industrial applications for lifting vehicles and heavy machinery.
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