The pneumatically operated,3-way/2-position,
5-way/2-position Series 4 valves have been
designed with different methods of return:
an Air-Pilot with mechanical spring, Air-Pilot return,
or Air-Pilot with bias return. This is possible due to
the type of design consisting of a balanced spool,
which means that it can be used for a very wide
range of applications. (including reverse porting)
The 3-way/2-position valves are normally closed
in the rest position when the pressure is supplied
at P, and are normally open when the pressure is
supplied at R, the use of A remaining unchanged.
Moreover, the 5-way/2-position valves can be
supplied via the ports R and S with two different
pressures if a cylinder must be operated using a
delivery pressure different from the return pressure.
On the Series 4 valves, two additional holes permit
assembly onto the manifold CNVL without the use
of a banjo bolt.
* See pages at end of sections for manifold options.
Key - Series 4 valves incorporate a double lip (Z)
seal against the spool. This seal design has improved
wear and sealing properties against the spool and
spacer glands for when the fluid media is less than
Key - Series 4 valves incorporate a more robust
packed bore design than the Series 3 valves. This
supports the improved (Z) seal design and better
wear life of the seals.
filtered air, without lubrication** (25 micon recommended)
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