!!5IntroductionSeveral Advices for Customers1. At Accumulator sizing.2. At Accumulator item number selection.· Please add "Oil leak amount" and "Compressed liquid volume" upon "Required oil discharge volume (Vw)".· Pressure loss amount which will occur between pump and Accumulator shall be deducted from the "Maximum working pressure (P3)", and the pressure loss amount which may occur between Accumulator and actuator shall be added upon "Minimum working pressure (P2)".· Please make gas precharging (P1) at the pressure to suit "Working temperature range", refering to the "Calculation Example" of page 22.· When designing the energy saving hydraulic circuit with an accumulator, it is important to install a pressure switch and to make the ON-OFF power of pump.· Please select Accumulator which has enough specification such as allowable maximum working pressure and allowable oil flow speed to satisfy the concerned circuit specification.· Please select Accumulator with suitable metalic and chemical material parts to meet the system fluid and working temperature.· When you use fire resistant fluid (Water Glycol Fluid, HWBF and Phosphate Ester Fluid), please select Accumulator which inside surface is not coated.· Prolonged use at the maximum working temperature will accelerate deterioration of the bladder. As a guideline, please use the temperature below 80% (70% when placed horizontally) of the maximum working temperature.· Before Accumulator operation, please read "Accumulator Handling and Maintenance Manual" attentively and understand the contents of the manual fully.· Accumulator is a pressure vessel. For using the accumulator, follow the notice on the maintenance manual.· When connecting the Accumulator to piping, please select the joint and the valve which diameter is suitable for the required flow rate.· Vertical installation with the oil port valve side down is most preferable for setting direction of Bladder Type Accumulator, but can be installed at an angle between vertical and horizontal. Bladder Type Accumulator cannot be placed upside-down.· Piston Type Accumulator does not have any limits for setting direction.· Care must be paid when Bladder Type Accumulator is installed horizontally as when installed this way, the "Maximum Allowable Oil Flow Speed" and "Allowable Compression Ratio" of the Accumulator decrease.· Space axially above Accumulator is required in 300 mm approximately at the least for Accumulator maintenance purpose.· When Accumulator is to be installed in a piping end, the fluid which goes into/out from it may not circulate well, and the fluid temperature in it may rise, and the bladder and the seals lifetime may become short. Please arrange the circuit where the service fluid circulates well.· Accumulator coating at the time of shipment from NACOL is for temporary purpose. So, please treat suitable rust-prevention treatment to suit the environment.· Set relief valve between Accumulator and check valve as shown by the circuit sketch right side. Then, set the relief pressure lower than Accumulator maximum allowable working pressure.WARNINGWARNINGRelief ValveAccumulatorPressure GaugeCheck ValvePressure SourceFuse PlugNotice to be paid when Accumulator selection is made.Notice to be paid previous to working Accumulator.Notice to be paid when Accumulator is installed.
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