DeZurik PEC 5450 Handmatig - Pagina 14

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DeZURIK

3650-7200 PEC Eccentric Valves

Reassembly

Installation of the plug during reassembly will be much easier if the body is blocked up so the bottom

journal cover can be removed, and a bar used to guide the lower plug journal into the lower bearing.

To assemble the valve, carefully follow these steps

1. Push a new journal bearing into the bore in the bonnet, then lubricate the bearing as described

in the LUBRICATION section of these instructions.

2. Push a new journal bearing into the bore in the valve body, then lubricate the bearing as

described in the LUBRICATION section of these instructions.

3. Slide the thrust bearing down the plug stem.

4. Slide the bonnet down the plug stem until it contacts the thrust bearing. (See Figure 6)

Figure 6 — Thrust Bearing Contacting Bonnet Inside of Valve

5. Lubricate the o-ring groove of the bonnet, then place the o-ring in the groove.

6. Clamp onto the plug stem and lift the bonnet and plug as an assembly.

7. Position the plug in the valve body as shown in Figure 7, then carefully lower the plug and

bonnet assembly into the valve body while guiding the lower plug journal into the bottom

bearing. Keep the rubber plug face away from the seat to avoid tearing the rubber facing.

8. Align the marks made during disassembly, then fasten the bonnet to the valve body.

9. Slide the packing adaptor down the plug stem and into the packing chamber in the bonnet.

10. Lubricate the packing, then push it, one ring at a time, into the packing chamber in the bonnet.

D10019

Page 14

April 2015