技術樣本德國賀德克手動操作的換向閥 

上海乾拓貿易有限公司

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which are designed to operate safely 

in the voltage range of +/- 15% of 

nominal voltage at max. 60 ° ambient 

temperature. The combination of steady 

surge and very hot temperatures can 

sealing materials. HYDAC defines here:

z NBR: from -30°C to +100°C 

immediate failure of the parts in the 

hydraulic system when these particles 

are accumulated in critical areas.

8. NOMINAL TENSION AND VOLTAGE

(solenoid valves - 20°C)

In solenoid valves coils are used 

Filtration and the associated particle size 

range of 10 mm2 /s to 420 mm2/ s.

7.CONTAMINATION LEVEL (FILTRATION)

HYDAC manually actuated directional valves are poppett or spool valves which 

5. MEDIA OPERATIONG  TEMPERATURE RANGE

Like the ambient temperature the media 

temp. range has a direct effect on the 

used materials in the valve, e.g. their 

mech. strength. Generally, the maximum 

z FPM: from -20°C to +120°C 

(all other influences see point 4)

6. VISCOSITY

HYDAC valves may be used generally 

only in specific viscosity ranges, as in 

too thin or thick liquids, the assured 

features can not be fulfilled. These 

viscosities are also different for the 

different valves, but in average in the 

temperature depends primarily on the 

of contaminants in the hydraulic oil is 

the most important point in the operation 

of a hydraulic system. Exceeding the 

specified particle size in the filtration 

classes 21/19/16 to 18/16/13 may cause 

result in extreme cases to failure of the 

solenoid. Therefore always a good heat 

dissipation and voltage level has to be assured

技術樣本德國賀德克手動操作的換向閥