ATTUATORI .
- PNEUMATIC ACTUATORS AND ACCESSORIES -
UsermanING ISSUE .10 March 2004
GT ATTUATORI S.r.l. REA MI 1558400 FAX (02) 90390368
V.le Europa 17 - 20090 Cusago Partita IVA e Cod.Fisc.12449540157 TEL (02) 90390322
Milan - ITALY- E-mail g.trevisan@iol.it
www.gtrevisan.it
PAG. 16 OF 20
INSTALLATION
OPERATION &
MAINTENANCE MANUAL
10.0 FCW TO FCCW CONVERSION
The actuators typically comes from the factory as Fail Clock-wise ( FCW ) units, that is Mounting
A, that allows infact FCW operation.
In the event that the need of the actuator changes from FCW to a Fail Counter Clock-wise ( FCCW )
actuator, that is Mounting C,
actuators can easily be field converted to this configuration, following next steps:
10.1 - Remove end caps, pistons and the pinion as described in the disassembly procedure. ( Section 5.0 ).
Prior to reassembly rotate both pistons 180° along the long axis of the piston. ( See figure 12 ).
Upon rotation of pistons, reassembly can be accomplished by following the reassembly instruction in
Section 6.0, Parts 6.1 to 6.12 of this manual.
FIGURE 12
Rotate the piston shown in Fig. 12 a as in position shown in Fig. 12 b,
to obtain the FCCW configuration (Mounting C)
REMEMBER: IN CASE OF SPRING RETURN TYPE, RE-INSERT
CARTRIDGE SPRINGS BEFORE END CAPS ASSEMBLING
ACCORDINGLY WITH TABLE 3, SPRING ORIENTATION CHART
REPLACE CARTRIDGE SPRINGS IF NECESSARY
10.2 - After this procedure has been accomplished, you should be able to put air into the right air port and
move the actuator to the normal position. ( If the actuator is not already in the normal position)
When air is placed in the left port, the actuator now rotates in the clock-wise direction first and then in the
counter clock-wise direction when returning in its normal position.
Logically, in the case of SPRING RETURN type, the return in normal position by counter clock-wise
rotation will happen just when the air will be put to the exhaust from left air port.
12 a
12 b
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