Description

Hydraulic Fluids. Use petroleum base oil such as anti-wear type hydraulic oils or R & O ( Rust and oxidation inhibitor ) type hydraulic oils (ISO VG 32 or 46) with a viscosity range of 20 to 400 cSt at temperature of 0-600C both to be satisfied. ■ Control of contamination. ■ Mounting ■ Alignment of Shaft. ■ Suction Pressure. ■ Hints on Piping. ■ Suction Piping. ■ Drain Piping. [Volume of Pre-Fill Oil Required] ■ Recommended Drain Piping Size. ■ Bleeding Air. ■ Starting. Much care should be taken to maintain control over contamination of the operating oil which can otherwise lead to breakdown and shorten the life of the unit. Please maintain the degree of contamination within NAS Grade 10. The suction port must be equipped with at least a 100 µm (150mesh) reservoir type filter and the return line must have a line type filter of under 10µm. When installing the pump the filling port should be positioned upwards. Employ a flexible coupling whenever possible, and avoid any stress from bending thrust. Maximum permissible misalignment is less than 0.1 mm TIR and maximum permissible misangularity is less than 0.20 . Permissible suction pressure at inlet port of the pump is between -0.17 and +0.5 Kgf/cm2 (-125 mm Hg~+0.5 Kgf/cm2 ). For piping to the suction port, use pipes of the same diameter as that of the specified pipe flange to be used. Make sure that the height of the pump inlet port is within one meter from the oil level in the reservoir. When using steel piping for the suction of discharge ports, excessive load from the piping to the pump generates excessive noise. Whenever there is fear of excessive load, please use rubber hoses. In case the pump is installed above the oil level, the suction piping and suction line filter should be located lower than the pump position to prevent air in the suction line. When using steel pipes for the suction or discharge ports, excessive load from the piping to the pump generates excessive noise. Whenever there is fear of excessive load, please use rubber hoses. Install drain piping according to the chart and ensure that pressure within the pump housing should be maintained at a normal Pressure of less than 1 Kgf/ cm2 and surge pressure of less than 5 Kgf/cm2 . Length of piping should be less than 1 m, and the pipe end should be submerged in oil. It may be necessary to bleed air from pump case and outlet line to remove causes of vibration. An air bleed valve (Model No. ST1004-※-1080) is recommended for this purpose. Before starting, first time fill the pump case with clean operating oil through the fill port. In order to avoid air blockage, when first starting, adjust the control valves so that the discharged oil from the pump is returned directly to the tank or the actuator moves in a free load. Under the conditions of pressure 160 Kgf/cm² and speed 1800 r/min. volumetric efficiency is over 98% and the overall efficiency is over 90%. In the “A16” pump, the noise level is as low as 57.3dB(A) [At the full cut-off pressure 210 Kgf/cm² with speed 1500 r/min. at one meter horizontally away from pump head cover.] ■ Features High efficiency Low noise level Because the overall efficiency is high and the cut-off characteristics is sharp, thus the input power may be saved. Because of small power loss, it is possible to reduce the rise in oil temperature. Accordingly, capacity of a reservoir can be reduced Accomplishment of energy saving.