Folio 1307-3
SOLENOID VALVE
Noise
If the valve develops a loud buzzing noise, first check voltage and pressure to
determine if they correspond to the nameplate rating. Examine the inside of the
sleeve assembly and the upper portion of the plunger and remove all foreign
matter imbedded in these parts. Be careful not to damage the sleeve seat.
Disassembly
Shut off pressure and electricity to the valve. The valve does not have to be
removed from the line.
Remove the screws from the housing. Remove the housing from the valve
assembly. After removing the housing, the yoke and coil can be removed with
an upward twisting motion.
Remove the screws holding the housing plate to the body (these screws are
shorter than the housing screens). The housing plate can be removed. The
sleeve assembly and plunger can then be removed.
Reassembly
Place the housing plate over the sleeve assembly. Use a light oil on the O-ring
flange seal. Always assemble the O-ring to the sleeve assembly before
inserting in valve bodies. Make sure the plunger and the return spring are in
place and then push the sleeve assembly, along with the housing plate, down in
place on the body with a slight twisting motion. Hold the housing plate down
and replace the two screws (these are the shorter ones). Tighten the screws to
18 ± 3 in-lb (2 ± 0.3 N•m). The placement of these screws should be such that
they give desired orientation of the housing later in reassembly. Before
completing reassembly, it is advisable to apply pressure to the port which leads
to the body chamber and check for leakage around the flange seal. If the valve
has a sleeve port, the port at the top of the sleeve assembly must be capped to
make this test.
Leakage can be noted by applying a water and soap solution to the joint and
watching it for air bubbles. Once the housing plate is secure, the yoke and coil
may be pushed over the sleeve assembly with a slight twisting motion. Replace
the housing with two screws. Tighten the screws to 18 ± 3 in-lb (2 ± 0.3 N•m).
Repeat internal leakage check.
CAUTION
Do not expose plunger assembly or O-rings to any type of commercial
cleaning fluid. Plunger assembly and O-rings may be cleaned with a mild
soap and water solution.
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