If the matching precision of the electromagnetic valve above the filter precision , valve core is easy to be blocked by the impurities not filteredresultingin the solenoid valve failure
a build - up of dirt on the valve internals(passive) were caused byThe solenoid valve failures
Fluid or moisture ... the causes of short circuitscausesolenoid valve problems
Excessive water in the pipelinewill causemalfunction of the solenoid valve