Graymills Liftkleen L-Series OMI - Manual (Page 6)

• COVER ASSEMBLY
The internal cover is made of stainless steel
to eliminate corrosion caused by vapor
condensation. On heated models, opening
and closing the lid is accomplished manually
utilizing a counter balanced lid (Figure 6). An
optional pneumatically powered lid is
available on heated units (Figure 7). Lids, as
well as tanks, are insulated on heated units.
Unheated units must be ordered with a
pneumatically powered lid (Figure 7). The lid
actuation system on these units contains a
temperature sensitive automatic closing
feature. In the event of a fire in the tank, the
platform assembly lowers and the lid closes
automatically.
WARNING
Always stand clear of lid. To prevent injury,
keep head, hands and body clear of the lid, lift
platform and lift mechanism at all times. These
units have moving parts, pinch-points and
close tolerances. Always stand clear of the lift
platform and lid when operating as the lid
could unexpectedly open or the platform
operate. Keep hands and fingers away from
tank when operating platform.
CAUTION
When turning air on or off or when operating
the lift platform, stay clear of the lid, lift
platform and operating mechanism as the lid
could unexpectedly open or the platform
operate.
• PNEUMATIC CONTROLS
The standard Liftkleen is furnished with a
pneumatic system that raises and lowers the
platform, a master on/off valve and a
filter/regulator/ lubricator unit.
The agitating lift platform contains air
controls that agitate the platform up and
down through a range of five inches with a
variable frequency of 20 to 40 strokes per
minute. Stroke frequency depends on load
and available air pressure. Adjustments to
the system should be made under operating
load conditions.
The platform agitation system consists of a
control box with a 2-position oscillation
switch, a start and a restart switch, a master
on/off valve, a filter/regulator/lubricator unit, a
pilot operated directional control valve and
two limit valves.
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The optional pneumatically opened lid control
is incorporated with the platform agitation
system.
Schematics and operation sequence sheets
are presented in Figures 4a through 4c.
All pneumatic tubing connections are made
with Instant Fittings. These make it possible
to connect and disconnect the tubing to the
fittings without the use of a wrench. To
disconnect a tube, simply push in the brass
or plastic collet with a screwdriver tip and pull
the tube from the socket. To engage the tube,
push it into the fitting until it hits the stop.
Sealing of the connection is achieved with an
O-Ring in the fitting. This procedure is shown
in detail in Figure 22.
The air cylinder for raising, lowering and
oscillating (agitating) the work platform has
pneumatic lines connected to both its “up”
and “down” ports. This provides for smooth,
positive, controlled motion in both travel
directions with minimal dependence on the
weight of the work load.
• ELECTRIC CONTROLS
Electrical controls are required on all units
which have pumps, electric heat or steam
heat. Models equipped with optional Superflo
pump assemblies come equipped with a
manual motor starter and thermal overload
protection. Electrically heated models are
equipped with from one to four stainless steel
4.5 KW electric, immersion-type heaters, a
thermostat and contactor. Refer to Table 4 for
the amperage requirements of Liftkleen
Electric Heaters and Pump Motors.
Insulation is added to the tank sides and top
on all heated models. This insulation consists
of one inch thick polyurethane foam.
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