Tindakan pencegahan untuk menggunakan pompa dosis:
1. Kebanyakan pompa kuantitatif menggunakan sirkuit terbuka.
2. Laju aliran pipa saluran masuk pompa sebaiknya antara 0,6 dan 1,5 meter per detik.
3. Laju aliran pipa saluran keluar minyak sebaiknya dikontrol pada 2,3~4,75 meter per detik.
4. Tekanan pada saluran masuk dan saluran keluar dikontrol pada -150mmHg ~ +0.5Kgf/cm2.
5. Panjang pipa saluran masuk oli harus dikontrol dalam jarak 1 meter.
6. Eksentrisitas antara pompa yang dipasang dan poros penggerak adalah 0,05mm ±10.
7. Sebelum menghidupkan pompa, pastikan terlebih dahulu apakah arah kemudi dan penggerak pompa sudah konsisten.
8. Saat menghidupkan pompa untuk pertama kali, harus dalam kondisi tidak ada beban tekanan pada ujung saluran keluar oli, dan sebaiknya dilakukan inching beberapa kali terlebih dahulu.
9. Viskositas saat menghidupkan pompa tidak boleh lebih dari 200mm2/detik, terutama saat menghidupkan dengan kecepatan rendah.
10. Suhu tangki bahan bakar sebaiknya lebih besar dari 8°C.
11. Saat pompa dihidupkan pertama kali, jika saluran keluar oli tidak dapat mengalirkan oli dengan lancar, maka udara harus dikeluarkan terlebih dahulu.
12. Meskipun emulsi air dalam minyak lunak dan dapat digunakan, tekanan dan kecepatan pengoperasian harus dikurangi sebesar 30%.
13. Jika menggunakan oli hidrolik yang tidak mudah terbakar, Anda harus memberi tahu pabriknya terlebih dahulu karena bahan segelnya berbeda.
14. Oli pengoperasian harus disaring dengan baik, dan kualitas oli harus memenuhi ISO 18/15 atau lebih baik.
Car in application(Fixed displacement single pump):
1.In fixd displacement vane pump system , the open circuit is recommended.
2.Set Suction Port , the fluid transmission speed at the pump: must be between 0.6M/sec ~ 1.5M/sec.
3.Set Discharge Port ,the fluid transmission speed : must be between 2.3M/sec ~ 4.75M/sec.
4.Set Suction , at the pump Suction Port must be between -150mmHg ~ +0.5Kgf/cm2.
5.Lay the suction piping the fluid level at least 1M.
6.When connecting the pump to an electric motor,limit the tolerance of alignment between the two shaft
centers to 0.05m/m TIR or angle ± 1 degree.
7.Before starting,make sure that direction of the electric motor shaft rotates the same direction
with the pump shaft as indicated with an the nameplate or on the housing the pump.
8.When the pump is be operated for the first time,place the pump delivery side in No-Load condition and
repeat starting and stopping of the motor for several times,to eject air form inside of the pump and
piping,if keep on 10 minutes operation will be much better.
9.Viscosity range for a fixed displacement vane pump.
800 mm2/sec maximum for starting with delivery.
200 mm2/sec maximum for starting at zero stroke.
16 mm2/sec minimum at maximum operating temperature.
10.In selecting a hydraulic fluid,remember that the minimum permitted temperature in the hydraulic
system must be at least 8O C above the pour point.
11.Air Bleed:
All the time of first-starting,if the pump does immediately prime, air should be bled the pump delivery line.
This may be accomplished by loosening connection in the delivery line close to the pump until oil flows-indicating the pump has primed.
An air bleed valve is available for this purpose.
12.Water-in-Oil Emulsions
Water-in-oil emulsions may used.However , they require caarful selection ang monitoring of the fluid.
13.Synthetic Fire Resistant Fluids
Phosphate esters and their blends with operating viscosity of the petroleum oil described above may beused.
These fluids are generally comatible with fluorocarbon and silicone elastomers.
14.Filtration Requirements
For satisfactory service life of components,use full flow filtration to provide fluid cleanliness
conforming to ISO code 18 / 15 or better.
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