DeZurik 250 Manual de instrucciones - Página 11

Navegue en línea o descargue pdf Manual de instrucciones para Controlador DeZurik 250. DeZurik 250 13 páginas. Diaphragm actuator iso mounting

Reversing Actuator Action

15. Note that the stem (B35) has one tooth with a punch mark, and the gear sector (B2) has two

pair of teeth with punch marks. The one marked tooth in the stem must mesh between the pair

of marked teeth that will provide 90º of gear sector rotation as the stem moves in the direction of

the air stroke. The spring-to-close and spring-to-open configurations are shown in Figure 1.

Accordingly, place the gear sector in position in the housing assembly (B1).

16. Mount the cover (B4) and gasket (B22) to the housing assembly (B1) with the four cover screws

(B36). Tighten the screws to 26 ± 3 foot pounds (35 ± 4 Nm).

17. Mount the pointer (B6) to the gear sector (B2) with the four screws (B7). Tighten the screws to

18 ± 2 inch pounds (2.0 ± 0.2 Nm).

18. Place the diaphragm (B14) in position on the lower diaphragm cover (B12). Align the holes in

the diaphragm with the holes in the cover.

19. Place the diaphragm cover (B11) in position on the diaphragm. Align the holes in the cover with

the holes in the diaphragm and in the lower diaphragm cover.

20. Assemble the cover screws (B15), nuts (B16) and washers (B42) in the holes, and tighten all

the screws evenly until the diaphragm is in contact with both covers. Then tighten the screws in

a crisscross pattern to 12 ± 2 foot pounds (16 ± 3 Nm) for the Model 145, or to 18 ± 2 foot

pounds (24 ± 3 Nm) for the Model 250.

21. Replace the actuator on the valve as described in the Replacing Actuator on Valve section

September 2015

DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING

(continued)

Page 11

DeZURIK

D10368