DeZurik POWERRAC R3 설치 및 운영 매뉴얼 - 페이지 11

{카테고리_이름} DeZurik POWERRAC R3에 대한 설치 및 운영 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik POWERRAC R3 15 페이지. Cylinder actuator

페이지 인쇄

Mounting Actuator on Valve

Certain high-temperature valves include and require a high-temperature gasket (B28). 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; engage the

actuator with the valve shaft in the desired mounting position as determined in step 1, and

slide the actuator onto the valve shaft.

Assemble the four actuator mounting screws (B26) with lockwashers (B27) up through the

mounting holes in the top of the valve (or the actuator adaptor on the valve), through the

gasket (B28), and into the threaded holes in the bottom of the actuator. Tighten the screws

finger tight— so that the valve and actuator mounting surfaces are in contact, but are free to

slide and self-center during the next step.

Tighten the adjusting screw (B9A) to 200 ± 30 foot pounds (271 ± 41 Nm).

Tighten the actuator mounting screws (B26) to 318 foot pounds minimum, (431 Nm).

Loosen the adjusting screw (B9A).

Re-tighten the mounting screws (B26) to 318 foot pounds minimum (431 Nm).

Tap the adjusting screw with a rubber mallet so that the gear (B8) bottoms out against the

lower housing bearing (B2).

10.

Begin to tighten the adjusting screw (B9A); as the adjusting screw becomes snug, repeat step

9, and finish tightening to 200 ± 30 foot pounds (271 ± 41 Nm).

11.

Tighten the jam nut (B30) counterclockwise to 200 ± 30 foot pounds (271 ± 41 Nm).

12.

Adjust the open and closed position stops as explained in the Open and Closed Position

Stops section.

13.

Operate the actuator and valve three full cycles to demonstrate that the unit operates

smoothly in both directions. Do not exceed 100 psi (690 kPa) in the cylinder.

Changing Mounting Position of Actuator on Valve

The actuator may be mounted on the valve in any one of the mounting positions shown on the

Installation Drawing. The mounting position may be changed as follows:

Remove the actuator from the valve as described in the Removing Actuator From Valve

section.

Replace the actuator on the valve as described in the Mounting Actuator On Valve section.

Lockable Model

The R3 PowerRac Cylinder Actuator is available as a lockable model that allows the actuator to be

locked in either the open or closed position. The lockable model is identified by PRL in the catalog

characteristic.

As shown in Figure 4, the lockable model includes two lock screws (B64) and two jam nuts (B65). In the

locked position, the screws engage with mating notches in the gear (B8). A lockout cover assembly

(B60) is also included.

August 2016

R3 PowerRac

(Continued)

Page 11

DeZURIK

Cylinder Actuator

D10359