Sumitomo QT2 Series Gear Pump

 Sumitomo QT2 Series Gear Pump

 QT2 Series Gear Pump Technical Date

Model Code

1. Hydraulic Fluids

Use petroleum base oils such as anti-wear type hydraulic oils or R & O (Rust and Oxidation nhibitor) type hydraulic oils equivalent to ISO VG-32 or 46. The recommended viscosity range is from 20 to 400 mm2/ s (98 to 1800 SSU) and temperature range is from 0 to 60°C (32 to 140°F),both of which have to be satisfied for the use of the above hydraulic oils.

2. Control of Contamination

Due caution must be paid to maintaining control over contamination of the operating oil which can otherwise lead to breakdowns 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 mm

(150 mesh) reservoir type filter and the return line must have a line filter of under 10 mm.

3. Mounting

When installing the pump the filling port should be positioned upwards.

4. Alignment of Shaft

Employ a flexible coupling whenever possible, and avoid any stress from bending or thrust.

Maximum permissible misalignment is less than 0.1 mm (.004 inches) TIR and maximum permissible misangular is less than 0.2°.

5. Suction Pressure

Permissible suction pressure at inlet port of the pump is between -16 and +50 kPa (5 in.Hg Vacuum and 7 PSIG). For piping to the suction port, use the pipes of the same diametre as that of the specified pipe flange to be used. Make sure that the height of the pump suction port is

within one metre (3.3 ft) from the oil level in the reservoir.

6. Hints on Piping

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.