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During actuation of the clamping device (clamping or releasing)
it must be ensured that a short ventilation time is maintained
between the switching processes.
This ventilation time must last
at least 0.5 seconds, depending on the hose length. For this pur-
pose we recommend the use of a 4/3- or 5/3- way valve (central
Pilot controlled check valve
The pilot-controlled check valve is an intrinsically sealed unit, and
comprises a valve body plus two locking pistons. Light mainte-
nance can be performed on it from the face side of the chuck via a
locking screw. The locking pistons of the valve unit control the rate
of the air that flows to and from the profile seals through two air
ducts. By changing the pressure of the air at the profile seals, the
air duct is vented into a cylinder chamber (relief chamber) on one
side. During this process, the compressed air is rerouted from one
cylinder chamber due to the valve housing moving axially while the
two individual locking/check pistons execute only one stroke when
locking their respective cylinder chambers. As a result of this process,
both O.D. and I.D. clamping are possible throughout the valve system.
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