Our consultants receive a lot of inquiries about the parameters of the hydraulic oil on which the Hylmet pump should work. Today we answer this question? We recommend that each of our pumps should work within the oil temperature range from + 20 ° C to + 60 ° C.
Within the recommended temperature range, the kinematic viscosity of the oil should be between 20 – 50 cSt. The full range is 10 ÷ 1000 cSt. * Example: We test our pumps with oil whose kinematic viscosity at 40 ° C is 44.3 cSt.
We also recommend that you use return filters in the hydraulic system, and if you are using a suction filter it is a strainer. Fine filter on the suction may limit the smooth flow of the oil, which leads to the unfavorable phenomenon of cavitation (similarly to the suction lines with too small diameter).
Filtration in hydraulic systems operating up to a pressure of 150 bar should be 25 μm (class 10 NAS 1638), while in systems with operating pressure greater than 150 bar – 10 μm (class 9 NAS 1638).