Specac GS15051, Руководство пользователя

Страница: 14 / 20

User Manual
12
Fig 7. Opening of Valve Tap for Bleed of Air Procedure
Note: Be very careful when opening the valve tap (79). It is not
necessary to open it any further than when the O-ring appears
and any air bubbles emerge with release of some pressurised
oil. Applying a low tonnage reading of 1 ton to the metal block,
ensures there is sufficient oil pressure in the system to allow the
air to be bled off at this point of the manifold body (77) assembly.
It is also a safe load to apply if the LOWEST tonnage gauge of 0
to 1 tons range has been fitted to the manifold body
( 77) and
this gauge is switched on line to register an oil pressure from
the bleed of air procedure.
When the oil flows freely and no more air bubbles are observed,
tighten the valve tap (
79 ) clockwise to close it fully again. The newly
fitted low tonnage gauge kit with twin gauges fitted to the press should
now have been successfully bled free of air.
Release the overall pressure in the system and hence load from the
metal block in the press by opening slowly and slightly (turn anti-
clockwise) the pressure release valve (
30 ) on the press.
75
79
80
Open Valve Tap
Until O-ring Just
Shows