Low Tonnage Gauge Kits for Atlas™ Manual Hydraulic Presses
13
Now, still with the valve tap (
79
) closed, follow the procedure to adjust
the
pressure relief valve assembly
on the press to set a maximum
tonnage load achievable on the press that corresponds to the
maximum load capability of the low tonnage gauge (
75
) as fitted.
(1 ton, 2 tons or 5 tons range.) The procedure to adjust the pressure
relief valve is found in the user instruction manual for the Atlas™
manual hydraulic press.
Switching On and Off the Low Tonnage Gauge
To bring the low tonnage gauge “on line” for load reading, the valve tap
(
79
) on the manifold body (
77
) is opened. (
79
) is a needle type valve
(See
Fig 6.
) and the tap handle only needs
a quarter to half turn
maximum
anti-clockwise to open for the low tonnage gauge (
75
) to be
switched on to register a tonnage load.
Beware:
If the valve tap (79) is opened too far from turning the handle
anti-clockwise for operation of the low tonnage gauge, there
is a risk that the O-ring (80) will not seal effectively and so oil
pressure in the system will be lost and there will be no
effective build-up of a tonnage load that can be applied to any
work/sample being held in the press.
The following table shows the situation relating to which gauge is
working when the pressure release valve (
30
) on the press and the
valve tap (
79
) on the manifold body (
77
) are either open and/or closed.
Valve
Status of Valve
Gauge Being Used
(30)
(79)
Open
Open
Neither
(30)
(79)
Closed
Open
(31)
(75)
(30)
(79)
Closed
Closed
(31)
(30)
(79)
Open
Closed
Neither
Содержание GS15051
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