First, the common problems in the use of pulsed solenoid valve:
Phase Failure Symptom Analysis Remedy All valves cannot be opened during installation and commissioning, but there is an action in the pilot section. Check whether the air bag pressure is too low. Check for leaks. Some valves do not work. Other valves are normal. Check valve line connections and coil replacement parts. Can not be closed, there is leakage of airbag pressure can not be established submerged type valve, the same air bag of a certain number of valves leak caused all the valve leakage as if to check the leakage of rectangular valve, the valve inlet and the injection port installed opposite Reinstallation of some valves can not be closed, there is a leak valve, close slowly There are impurities adsorbed on the diaphragm Clean the diaphragm Check the diaphragm is complete The moving iron core is stuck Check the moving core and the air plug diaphragm Throttle By Blocking the diaphragm Diaphragm orifice During the use of certain valves Leakage diaphragm Closed Undead valve Normally open Impurities adsorbed on the diaphragm Clean diaphragm Check diaphragm Complete coil Heated burned lead Damaged moving core Card stuck Long Time power check the moving iron core and air plug, etc. Replace the parts in time Check the working condition of the control system There is voltage but the valve does not work The diaphragm is damaged or the orifice is blocked Replace the accessories Low ambient temperature -10C ° valve has leakage can not be opened with ice or ambient temperature is too low the valve.
Second, to extend the life of the filter bag precautions:
1, filter bag clogging. When the filter bag is clogged, the resistance increases, which can be manifested by the reading of the differential pressure meter. Filter bag clogging is the main cause of filter bag wear, punching, falling off and other phenomena.
Cause filter bag clogging
(1) Temporarily strengthen dust removal to eliminate plugging of filter bags; (2) Replace filter bags partially or completely; (3) Adjust installation and operating conditions.
2, filter bag damage. The shape of the filter bag and the installation method and mechanism of the filter bag determine the location where the filter bag is easily damaged, and can be checked and maintained accordingly. However, the filter bag is mainly damaged due to the following reasons. If the damage occurs, check the following table:
3, filter bag aging. It is mainly due to the following reasons that cause investigation must be carried out, elimination measures should be taken and filter bags replaced.
(1) Hardening shrinkage due to abnormally high temperatures; (2) Contact with steam due to acid, alkali or organic solvents; (3) Reaction with moisture
4, the filter cloth should not be hung too loose or too tight, too loose and easy to dust, too tight and easy to pull bad.
5, old and new filter bags should not be mixed, to avoid damage to the normal operation of different equipment.
6. Replace the filter bag, blow it with compressed air first, and then check if there is any hole. After the hole is repaired, leave it to be replaced. If the filter bag is stuck with dust, rinse with water and leave it to dry after it has dried.