Berchtold OPERON B 810, Service Parts

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OPERON B 810 SURGICAL TABLE
PRINCIPLES OF OPERATION
Rev. 1 70-000-0027
4-6
TABLE 4-1 MANIFOLD VALVE OPERATING SPECIFICATIONS
Parameter Range
Operating Pressure Up to 3626 psi (250 bar) depending on flow rate
Flow Rate 61 in.
3
/min (3 dm
3
/min) maximum
Ambient Temperature -22 °F to +212 °F (-30 °C to +100 °C)
Pressure Medium Temperature -7 °F to +176 °F (-20 °C to +80 °C)
Pressure Medium Hydraulic oil per DIN51524 and DIN51525
Viscosity Range 0.0006 in.
3
/s to 0.0195 in.
3
/s (10 mm
3
/s to 320 mm
3
/s)
Filtration 25 µm to 40 µm
Installed Position Any
Seal Material NB Rubber
Nominal Voltage 24 VDC (18 to 32 VDC)
Power Consumption 10 Watt (per solenoid)
Electrical Connection AMP Superseal Series 1.5 plug (double-pole)
Duty Cycle 100% ED
Manifold Valve Operation
The manifold valves operate as follows:
1. Hydraulic pressure is applied to the P (pressure)
fitting of a valve.
2. A solenoid coil (item 2) is energized by an 18V -
32V DC signal.
3. The coil forces the 3-position solenoid spool to
move. This is illustrated in the section of the
graphic labeled “energized position.”
4. Fluid flows from the center pressure line out to
the cylinder.
5. A pilot pressure pushing on the check valve
opens the return path.
6. The variable flow control valve on the return line
can control the flow or cylinder speed.
•
A flow control screw on each valve can be
adjusted with a 2.5mm Alan wrench.
•
Turning the screw clockwise reduces the
flow. (See FIGURE 4-8 for the location of
the flow control screws.)
7. When power is removed from the solenoid, the
valve locks in the neutral position. This prevents
any cylinder movement.
COLUMN HYDRAULICS
General Information
FIGURE 4-9 shows a schematic of the column
cylinders.
All cylinders in the column are dual actuated, which
means that hydraulic pressure is required to push the
cylinder in both directions. The foot locks, which are
on the base, are single action poppet valves: pressure
is required only to move the legs to the locked
position.
There are 2 lift cylinders: One in the lower stage and
the other in the upper stage.
The lift cylinders are not field replaceable. Although
highly unlikely, a failure of one of these cylinders
will require that the table be returned to the
manufacturing facility for repair. A loaner table may
be shipped for the customer to use while repairs are
being made.
There is one Trendelenburg cylinder.
There is one Tilt Cylinder.
There is a hydraulic fluid distribution block to
connect many of the valves and cylinders.
The solenoid valves on the “A” side in the schematic
are on the left side of the hydraulic manifold, and the
solenoid valves on “B” side in the schematic are on
the right side of the manifold.
All solenoid valve labels start with “Y”
The column Solenoids and their functions are listed
in Table 4-2.