2026-09-28
The valve is not closing when the coil is de-energized..
If the valve is not closing when the coil is de-energized;
The valve might be reverse installed towards flow
Solution
Ensure that the valve is installed by the correct flow direction according to indictor on valve's body
The plunger might be stucked in the tube or adherent on the orifice due to dirt or corrosion
Solution
Ensure that the inside of the core tube and plunger are clear. Use filter prior to valve if needed.
Pilot orifice or/and main orifice might be damaged by corrosion.
Solution
Replace with the original one
In the maintenance process, some components might be lack or reverse installed or assembled wrong in order.
Solution
Check it by the assembling diagram