Solenoid Valve fails to open
if valve is normally closed (Power to open) Or Normally Open (Power to
close) Use magnetic detector lift coil slightly to check if magnetic
field is present.
Do not remove coil if energised as IT WILL BURN OUT
Check contacts Check wire connections and DIN connector.
coil marked voltage is correct for supply.
Check voltage tolerances
normally +/- 10% however refer to solenoid valve data sheet.
Some AC (alternating Current) coils
work on the principle of creating an inrush condition to open the valve,
check your power supply is rated for the coil current requirements.
Most valves will have cable plugs rated to IP65, ensure cable gland and
cable diameter are matched, plug connecting screw correctly tightened
and allow cable to drop under cable gland to help prevent ingress of
See coil burnt section
coil power rating, higher power version may be required. Reduce inlet
pressure in line with valve specification as shown in solenoid valve
inlet/ outlet pressure difference (Differential) is in line with design
conditions of the valve.
If too low valve will need replacing with 0
rated assisted lift version.
Remember that the downstream pressure will rise with vertical pipework, other control equipment or systems.
The outlet pressure should be deducted from the inlet supply pressure to give the pressure difference or differential, and other system demands from the inlet may also reduce the overall supply
pressure and further reduce pressure differentials.
Damaged Armature tube Replace armature tube. See spare parts list.
- Dirt ingress in armature tube
Clean valve armature or replace. Suspended particles of dirt can be filtered
out with a filter strainer, always mount valve with coil upright to reduce wear
on the top of the solenoid armature if any dirt gets into the medium.
If hard water scale builds up; install water softener or install a motor actuated ball valve, otherwise install Y type strainer to filter out suspended
damaged components and check media compatibility with valve.See our chemical compatibility charts.
armature is pitted due to cleaning or dosing fluid? Some acids will
attack the 430F stainless armature, which is corrosion resistant but not
guaranteed to withstand all fluids.
- Missing components after maintenance
Replace parts according to spares listing.