DeZurik G-SERIES Manuel d'instructions - Page 9

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DeZurik G-SERIES Manuel d'instructions
G-Series Cylinder Actuator Used on BAW Butterfly Valves

Disassembling Actuator

See Figure 5 for actuator parts identification.
1. Discontinue flow and relieve pipeline pressure and place the actuator in the open position.
Accidental operation of power actuator can cause personal injury or equipment damage.
Disconnect and lock out power to actuator before servicing.
2. Disconnect and lock out the pneumatic power to prevent accidental operation of the actuator.
Disconnect the tubing from the cylinder.
3. Remove the screws (B23), nuts (B24), lockwashers (B28) and stop cap (B29) from the actuator
housing (B1).
4. Remove the cap nut (B25), jam nut (B22) and spacer (B21) from the end of the rack rod (B6).
5. Remove the screws (B27) fastening the cylinder assembly to the actuator housing (B1), and
carefully remove the cylinder assembly and rack rod (B6) by sliding it away from the actuator
until the rack rod clears the actuator housing.
6. Remove the screws (B18) fastening the pointer to the gear (B3) and remove pointer.
7. Scribe corresponding lines on the cover (B2) and housing (B1) to be used for alignment during
assembly, then remove the screws (B13) fastening the cover to the housing and remove cover.
8. Remove the rack (B4) and gear (B3) from the housing (B1).
9. Remove screws (P4) and lockwashers (P10) and lift actuator assembly off valve. See Figure 3
for connecting parts identification.
10. Remove the rack bearing (B7) (if noticeable wear to bearing) by driving the pin (B11) out of the
rack bearing and housing (B1).
August 2012
Figure 5 – Actuator Parts Identification
Page 9
DeZURIK
D10480