Milnor TP1607 Series, Installation And Service

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—Referring to FIGURE 1, the press cycle begins as the goods from the
washer discharge into the can on the press bed. The hydraulic ram (large diameter hydraulic cylinder)
slowly decends by gravity, permitting the flexible, water-filled diaphragm mounted to the ram to decend
into the can. Most of the oil filling the decending ram is not pumped in, but is pulled in by vacuum,
through the open pre-fill valve (FIGURE 3). As the ram continues its free fall, the diaphragm shapes to
the goods, and starts squeezing the water out of the goods. The free fall speed and force of the ram is
slowed and controlled by oil viscosity, piping restrictions, and a throttle valve (FIGURE 4). As the
decending ram meets with resistance from the goods, the pre-fill valve closes, and the pumping system
begins to pressurize the ram in up to four individual steps. The pressure at each step is controlled by an
individual switch on the digiswitch (FIGURE 6). The press can be interrupted, or stopped, at any of
these four pressure steps, according to the wash program. Maximum system pressure is limited to 320
bar by the system relief valve (item 1.3, FIGURE 2).
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—The hydraulic system (shown in FIGURE 2) consists of an electric
motor (1.4), that runs continously, driving an axial piston hydraulic pump (1.2). This pump uses
microprocessor and hydraulic feedback to continously modulate pump output (e.g. the lower the line
pressure, the higher the pump output) through the proportional valve (1.1). The pump output flows
through electrically operated valves to operate small devices like can cylinders (4.8) and the cake pusher
motor (4.4), and actuate large devices such as the pre-fill valve (4.3).
Press bed
Can
Diaphragm
Ram
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