Moog D633-A Series, Руководство пользователя

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3 Product Description Safety function/fail-safe
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 15
3.2.1.4 Bushing-spool identification
Bushing-spool
identification
(4th position in type
designation)
The bushing-spool identification, i.e., the 4th position in the valve type designa-
tion, indicates which bushing-spool version is integrated in the valve.
Overview of type designation:
Ö
Chapter "3.5 Nameplate", page 18
3.2.2 Restarting the valve
Restarting the valve
After shutdown/failure of the command signal:
After the transition of the valve into the fail-safe state on account of a shut-
down/failure of the command signal to the valve, it will be necessary to restart
the valve by applying the command signal in accordance with the technical
data.
Type designation:
1 2 3 4 5 6 7 8 9 10
A
• •
K
•
5
• • • • •
Ident. Valve configuration Bushing-spool version
O 4-way Linear characteristic curve, zero lap
A 4-way Linear characteristic curve,
±1.5 % to ±3 % positive overlap
D 4-way Linear characteristic curve, ±10 % positive overlap
B 3-way Valve opening: P t A and A t T
Z 2x2-way Valve opening: P t A and B t T (externally connect P with
B and A with T), with port Y only
X Special spool, on request
Table 3: Bushing-spool identification in the type designation
bushing-spool identification
WARNING Before restarting the valve after the transition of the valve
into the fail-safe state, it is necessary to identify and if
necessary rectify the cause of the fault at the machine
end.
It is also necessary to ensure that restarting the valve
does not give rise to unintentional or dangerous states in
the machine.