Note: ①When the working fluid is phosphate ester liquid, use special seal (FPM). Add prefix [F-] before the specified model when ordering. ②The outlet pressure must always be higher than the inlet pressure.
②The outlet pressure must always be higher than the inlet pressure.
1. During installation, the concentricity tolerance of the pump shaft and motor must be less than 0.10 mm (TIR), the maximum allowable angular error must be less than 0.2 degrees, and a flexible coupling must be used; the pump shaft must not bear radial and axial loads; the bracket must be strong and rigid, and able to fully absorb vibration.
2. Secure the pipeline, especially the inlet pipe, according to the port size, and assemble a safety pressure relief valve in the system (inlet flow rate between 0.5 and 1.5 m/s). The set pressure of the safety valve must not exceed the maximum pressure of the pump; the inlet pipe must be strictly sealed and must not leak; the oil tank should be equipped with a diaphragm to separate bubbles and dirt from the oil; the oil return nozzle should be below the liquid level, with a minimum depth of 50 mm, to avoid bubble formation even at low positions.
3. Set the suction pressure at the pump inlet port: Hydraulic oil for oil is +35 ~ -16.7 KPa. Hydraulic oil for water-ethylene glycol and phosphate ester is +35 ~ -10.1 KPa.
4. If the pump is mounted on the oil tank or above the oil tank cover, the suction port height of the pump should be less than 500 mm.
5. The oil should be kept clean, and the pipes and oil tank must be thoroughly cleaned; a precision filter should be assembled in the system, with a recommended accuracy of 25 μm, and the oil cleanliness should be within NSA12. At the inlet of the pump, a filter with sufficient capacity should be fixed 50 mm from the bottom of the oil tank (the rated flow rate should be more than twice the pump flow rate), with a recommended accuracy of 100 μm (150 mesh).
6. It is recommended to use anti-wear industrial hydraulic oil or automotive crankcase oil with letter identification SC, SD, SE, or SF, with a viscosity grade of 32 to 68 cSt at 40 ℃.
Preferred viscosity under rated speed and pressure:
Minimum 13cSt Maximum 54cSt
Minimum 49 ℃ Maximum 65 ℃
7. Check the inlet, outlet, and direction of rotation before starting the pump. After fixing the pump, manually rotate the pump shaft smoothly and flexibly. It is best to fill the pump with oil before the first use.
In initial operation or operation after a long rest, the pump may have difficulty in drawing in liquid; in this case, a bleed valve should be installed on the discharge side in advance, or the air should be discharged by slightly loosening the connection on the discharge side. When starting, try to operate the pump intermittently without load.
8. Do not start the pump when the outlet pressure is lower than the inlet pressure. This will cause operating noise and blade instability.
9. When starting, if the oil viscosity is higher than the suitable viscosity (54cSt), the pressure should be limited to 50% or less of the respective rated value until the system warms up.
