SQP421-50-17-8-86AAA-18 | Low Noise Triple Fixed Displacement Vane Pump

Hydraulic fluid

• Note that pump specifications such as maximum working pressure and maximum speed may differ with the type of hydraulic fluid used. See Appendix 1 regarding hydraulic fluid selection.
• Mineral oil based fluid
  • General industrial anti-wear hydraulic fluid is recommended.
• Fire resistant fluids
  • Water glycols may be used with Tokyo Keiki standard type pumps. However maximum working pressures, maximum speeds, etc., specifications will differ from those of mineral oil based fluids.
  • Please refer to specifications of each pump for details.
  • Fluorine seals are used with pumps that operate on phosphate ester fluids. An "F3-" suffix is used to designate such pumps. Specifications for maximum working pressures, maximum speeds, etc., will differ from those of mineral oil fluids.
  • Please refer to specifications of each pump for details.
  • Please consult Tokyo Keiki regarding other fire resistant fluids.

Piping and Filtration

• Suction pressure (gauge pressure)
• Proper inlet suction pressures are +35~-16.7 kPa for mineral oil fluids and +35~-10.1 kPa for water glycol and phosphate ester fluids.
• Suction pipe flow rate should be kept within 0.5~1.5 m/s.
• Filtration
  • On the suction side, a 150 µm or equivalent tank filter (suction filter) should be used.
  • On the delivery side, a full flow filter which provides filtration of less than 25 µm or bypass filter which provides filtration of less than 10 µm should be installed.