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コントロールユニット DeZurik PEC 4200のPDF マニュアルをオンラインで閲覧またはダウンロードできます。DeZurik PEC 4200 18 ページ。 Eccentric valves

DeZURIK

3650-7200 PEC Eccentric Valves

Packing Replacement

To replace the packing without removing actuator, see "Replacing Packing Without Removing Actuator"

section.

1. Discontinue pipeline flow and relieve pipeline pressure.

2. Scribe the actuator and valve bonnet for alignment when reassembling.

Moving parts from accidental operation of power actuator can cause personal injury

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

3. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power

to prevent accidental operation of the actuator.

When an eccentric valve is mounted in a vertical pipeline— or mounted in a horizontal

pipeline with the plug stem horizontal—gravity can cause the plug to swing to a lower

position in the valve body when the actuator is removed. Place the plug in the lowest

position before removing the actuator.

4. Remove the actuator from the valve. See Actuator Instructions.

5. Remove the two access covers from the bonnet.

6. Remove the nuts that hold the packing gland in place, and slide the packing gland off the plug

stem.

7. Remove the packing from the bonnet packing chamber.

8. Scrape the RTV silicone material from the top of the bonnet and access cover mounting

surfaces.

9. Lubricate the new packing, then install it one ring at a time as shown in Figure 4.

D10019

Figure 4 — Correct Packing Installation Sequence

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April 2015