Failure that is easiest to happen and Removal Method
The main fault is the bad actions, disclosure, mainly because of the condensation water in compressed air, dust, rust, poor lubrication, seals and poor quality, etc.
| failure | analysis of causes | removal method |
| Not operated when power on | Power cable connection is bad Power supply voltage change is not permitted within the scope Coil short circuit or burn out |
connecting power line well Adjust the voltage within the normal range Replacement coil |
| flow can not pass when opening valve | Fluid pressure or working pressure differential is not fit Fluid viscosity or temperature does not meet Around the spool and the moving core it is mixed with dirt, impurities filter before valve or guide valve hole plug operating frequency is too high or service life is end when using |
Adjust pressure or work pressure differential or replacing suitable product clean the internal part, the filter valve must be installed before the valve Timely cleaning filter or valve guide hole re-select product model or replace new products |
| flow can not be cut-off when closed | Fluid viscosity does not meet Fluid temperature does not meet Spring deformation or life is end The seat is defective or adhesion of dunghill. Gasket extrusion, defects or deformation Balance hole or throttle hole plugs operating frequency is too high or service life is end when using |
replace suitable product replace suitable product adding gasket or replace spring Cleaning, grinding or update Updated, re-assembly Cleaning on time change to select product model or replace new product |
| out leakage | Loose pipe connections Pipe connecting external sealing piece is damaged |
Tighten bolts or connecting pipe thread Replace sealing part |
| serious in leakage | Fluid temperature does not meet Guided seat and main valve seat have impurities or defects Guided seat and main valve sealing gasket extrude or deform Non-performing spring assembly, deformation, or life is end operating frequency is too high when using |
Adjust the fluid temperature or replacement cleaning or polishing repair or replacement Replace sealing gasket Replace Spring re-select product model or replace new product |
| the noise is too large when power on | Fastener loosening Voltage fluctuation, is not permitted within the scope Fluid pressure or working pressure differential is not suitable Fluid viscosity does not meet Armature pull-surface impurities |
Tightening adjust to within the normal range adjust pressure or work pressure differential or replace product replace suitable product cleaning on time |
