- ページ 10

コントローラー DeZurik 250のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。DeZurik 250 13 ページ。 Diaphragm actuator iso mounting

DeZURIK

DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING

Reversing Actuator Action

Follow the steps below to change the actuator from spring-to-close to spring-to-open or vice versa.

Refer to Figure 1 for component identification.

1. Remove the actuator from the valve as described in the Removing the Actuator from Valve

section.

2. Apply just enough air pressure to the actuator to relieve the force on the stop bolts (B23) and

back out both stop bolts several turns. Relieve the air pressure.

3. Remove the diaphragm cover screws (B15), nuts (B16), washers (B42), diaphragm cover (B11)

and diaphragm (B14).

4. Remove the four pointer screws (B7) and the pointer (B6).

5. Remove the four cover screws (B36), the cover (B4) and the gasket (B22).

6. Carefully remove the diaphragm disc (B13) and stem (B35) from the housing assembly (B1).

Do not scratch or damage the stem.

7. Remove the four screws (B9) and lockwashers (B10) and remove the lower diaphragm cover

(B12), reinforcing plate (B20) and diaphragm base (B17) assembly from the housing (B1).

8. Remove the four screws (B9) and lockwashers (B10) and remove the spring cartridge (B8) from

the housing assembly (B1). Do not disassemble the spring assembly.

The spring cartridge includes a compressed spring. Death or serious injury can result if

the spring cartridge is disassembled.

DO NOT DISASSEMBLE THE SPRING CARTRIDGE

11. Mount the spring cartridge (B8) to the housing assembly end opposite of where it was removed

with screws (B9) and lockwashers (B10). Tighten the screws to 180 ± 20 foot pounds (244 ± 27

Nm).

12. Mount the lower diaphragm cover (B12), reinforcing plate (B20), and diaphragm base (B17)

assembly to the housing assembly (B1) with screws (B9) and lockwashers (B10) opposite the

spring cartridge (B8). Tighten the screws to 180 ± 20 foot pounds (244 ± 27 Nm).

13. Carefully insert the stem (B35) into the housing assembly (B1) with the teeth facing the gear

sector (B2) position.

14. Apply a paint-like coating of lubricant to the teeth and bearing hubs of the gear sector (B2) and

to the teeth of the stem (B35) using one of these lubricants:

- Keystone Zeniplex-1 (recommended)

- Amoco Amolith Grease #1-EP (alternate)

- Amsoil GHD (alternate)

- Mobil Mobilux EP 1 (alternate)

- Shell Alvania EP 1 (alternate)

- Texaco Multifak EP 1 (alternate)

Note: Do not get grease on the bearing surfaces of the stem or on the three stem bearings.

September 2015

Page 10

D10368