Festo CPA VI Series Manual page 59

3. Installation
Festo P.BE-CPA-EN en 0207c
Vacuum/low pressure operation
The CPA valve terminal can be operated with vacuum or low
pressure > – 0.9 ... < 3 bar under the following conditions:
– regulated auxiliary pilot air must be supplied separately.
– the CPA valve terminal must be fitted with the following
valve sub-bases:
– 5/2-way valve, single-solenoid (Ident. code M)
– 5/2-way valve, double-solenoid (Ident. code J)
– 5/3-way valves in mid-position pressurized
(Ident. code B), blocked (Ident. code G) or exhausted
(Ident. code E).
Please note
Valve sub-bases with 3/2-way valves (Ident. code N, K or
H) cannot be used for vacuum or low-pressure operation.
If your CPA valve terminal is fitted with these valve sub-
bases, a separate pressure zone must be provided for
these valves (supply pressure see Fig. 3/3 for CPA10 or
Fig. 3/4 for CPA14).
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