DeZurik 250 Gebrauchsanweisung - Seite 7

Blättern Sie online oder laden Sie pdf Gebrauchsanweisung für Controller DeZurik 250 herunter. DeZurik 250 13 Seiten. Diaphragm actuator iso mounting

Removing Actuator From Valve

Refer to Figure 1 for component identification.

1. Shut down the flow in the pipeline.

Flow in the pipeline with the actuator removed can allow the valve to slam closed and

cause personal injury and/or damage to the flow system. Shut down the flow in the

pipeline before removing the actuator from the valve.

2. Disconnect and lock out the pneumatic power to the actuator to prevent unexpected operation

of the actuator.

Moving parts from unexpected operation of a powered actuator can cause personal

injury or equipment damage. Disconnect and lock out power to the actuator before

servicing.

3. Remove the four actuator mounting screws (B26) and lockwashers (B27).

4. Lift and remove the actuator from the valve shaft. Retain the key for the valve shaft (A key is

used only with round valve shafts).

Refer to Figure 1 for component identification.

1. Place the valve in the closed position for a spring-to-close actuator or in the open position for a

spring-to-open actuator.

2. Select the desired mounting position for mounting the actuator on the valve. Refer to the

optional positions shown on the Installation Drawing.

3. Certain high-temperature valves include and require a high-temperature gasket (B44). If the

valve includes a gasket, use the gasket included with the valve rather than the gasket included

with the actuator. Place the gasket between the actuator and the valve. Align the shaft hole in

the gear sector (B2) with the valve shaft key and the valve shaft (A key is used only with a round

valve shaft.) and slide the actuator onto the shaft and into position on the valve.

4. Fasten the actuator to the valve with the four mounting screws (B26) and lockwashers (B27). If

the smaller bolt circle is used, tighten the M12 screws to 83 ± 10 foot pounds (113 ± 14 Nm) if

carbon steel or to 58 ± 8 foot pounds (79 ± 11 Nm) if stainless steel; if larger bolt circle is used,

tighten the M20 screws to 435 ± 60 foot pounds (590 ± 80 Nm) if carbon steel, or to 300 ± 40

foot pounds (400 ± 50 Nm) if stainless steel.

5. Reconnect all pneumatic and electrical connections.

6. Operate the valve to check the open and closed positions. Adjust the stops if necessary as

described in the Open Closed Position Stops section.

September 2015

DeZURIK MODELS 145 AND 250 DIAPHRAGM ACTUATOR ISO MOUNTING

Page 7

DeZURIK

D10368