2.Dither is an additional signal input applied to servo valve to improve the threshold of servo valve and system performance. It is recommended dither frequency be a little higher and peak to peak amplitude be less than 5%.
3.For linear direct servo valves return reverse pressure of hydraulic source should be less than 5MPa.
4.Alternating signal should not be applied to servo valves in case no pressure is supplied to servo valves. But direct drive servo valve is an exception.
5.Air bleed hole should be properly set on the oil circuit of servo valve and actuator to make servo control system stable, especially for position and force systems.
6.Should lower pressure gain and internal leakage of servo valve is spotted after the system is in operation for some time, it indicates there is an increase in the wear of sharp edge of sliding spool. In case of slow response in system, filter to protect nozzle-flapper stage may be clogged, causing performance degrade in the nozzle-flapper stage. Should these problems occur, please return the valve to factory for repairs or replace a new one.7. Surface to which valve is mounted requiresfinish, flat within 0.02mm.
9.Please strive to control fluid temperature and ambient temperature of servo valve. Big temperature change or high temperature will affect the performance and operational life of servo valve.
10.Instruction for hydraulic oil source used for servo valve:(1)Hydraulic system to which valve is mounted must be cleaned thoroughly.Oil tank should be sealed.