SPI Supplies
28
SPI-DRY Critical Point Dryer
7.1
Chamber Components
7.1.1
Viewing Window Maintenance
(a) To remove the viewing window, remove the four hexagon socket screws, and remove the clear
plastic safety shield.
(b) Unscrew and remove the viewing window slotted retaining ring using the included spanner. Use care
not to disturb the end plate covering the water jacket.
(c) Clean and inspect the O-ring seal. Replace if the O-ring is hardened or damaged.
(d) Remove the viewing window and bonded seal.
(e) Clean and inspect the window and seal. Replace if damaged.
(f)
Re-assemble in reverse order, taking care not to damage the window edges.
7.1.2
End Plate Maintenance
(a) To remove the water jacket end plat, undo the four hexagon socket screws and pry the end plate
away from the pressure vessel.
(b) Thoroughly clean the end plate the mating surface on the pressure vessel. Discard the old cork
gasket and nylon screw seal.
(c)
Re-fit the end plate, using a new cork gasket and nylon screw seal.
7.1.3
Drain Valve Maintenance
(a) To remove the
DRAIN
valve for cleaning, unscrew and separate the pressure vessel from the stand
pillar by rotating the vessel counter-clockwise relative to the base.
(b) Unscrew and remove the
DRAIN
valve and adapter plug.
(c) Remove the insert and O-ring for inspection and cleaning.
(d)
Re-assemble in reverse order, using a new O-Ring and bonded seal.
7.1.4
Gas Control valve Maintenance
(a)
Gas Control Valve Adjustment.
If the action of one of the gas control valves is too tight or too
loose, adjust it as follows:
a. Unscrew and remove the control valve knob retaining unit.
b. Lift the knob from the square keyed valve shaft.
c. Slightly loosed or tighten the shaft sleeve nut as required.
d. Re-assemble the valve and test the action.
e.
If necessary, repeat the above steps until the valve operates in a satisfactory manner.
(b)
Gas Control Valve Strip Down.
a. With the valve removed from the vessel body, unscrew the knob retaining nut.
b. Lift the knob from the square keyed valve shaft.
c. Unscrew and remove the shaft sleeve nut.
d. Unscrew and extract the valve shaft, with O-ring seals, from the valve body.
e. Inspect and clean the seals, replacing as needed.
f.
Re-assemble in reverse order.
NOTE: When refitting valves to the pressure vessel body, only tighten them by hand.
Over tightening will damage the O-ring seals.
7.1.5
Inlet / Vent Valve Maintenance
(a) To remove the
INLET
or
VENT
valve, loosen the valve locking nut by one turn.
(b) Remove the valve by rotating in a counter clockwise direction.
(c) Remove the insert and O-ring for inspection and cleaning.
