Install Instructions

ManualsBrandsSiemens Manuals658 Series Globe Valves658 Powertop Rebuild/Repair Kit for 1" 3-Way Valves

Table Of Contents

Installation Instructions

Document No. 129-187

September 25, 2009

VP 658 and VE 339 Three-way Powertop

Valves Rebuild/Repack Kit

Item Number 129-187, Rev. 200 Page 1 of 3

Product Description

This rebuild/repack kit contains the parts necessary

to replace the stem packing and the stem and

throttling plug assembly on one Powertop three-way

valve. Using this kit will convert previous models of

VP 658 to Model 5 and previous models of

VE 339

to Model 4.

Contents

Part Qty. Part Qty.

Washer

O-ring retainers

Large packing O-rings

Packing ring

Small packing O-rings

Teflon® backup rings

Repacking tool

Lower seat

Large 0-ring

Stem and throttling plug assembly

Product Numbers

Valve Size in Inches Rebuild/Repack Kit Number

1/2 658-405

3/4 658-406

1 658-407

1-1/4 658-408

Warning/Caution Notations

WARNING

Personal injury/loss of life may

occur if a procedure is not

performed as specified.

CAUTION

Equipment damage, or loss of

data may occur if the user

does not follow procedure as

specified.

Required Tools

• Two 7/16-inch (11 mm) open-end wrenches

• 1/4-inch (6 mm) nut driver or flat-blade

screwdriver

• Medium adjustable wrench

• Pick to remove packing

Troubleshooting

Problem Check For Recommended

Correction

Medium is

leaking

through valve

when closed

Damaged or worn

disc

Replace stem and

throttling plug

assembly

Foreign material in

valve body

Flush or clean out

foreign material

Pressure drop

across the valve is

larger than

expected

Reduce differential

pressure

Increase control

pressure or spring

force

Replace valve

Damaged or worn

seat

Replace seat or

body and seat

assembly

Medium is

leaking out at

stem

Pitted stem

Replace stem and

throttling plug

assembly

Worn or damaged

packing

Replace packing

Medium is

leaking at

body or lower

seat

Worn or damaged

O-ring

Replace O-ring

Lower seat loose Tighten lower seat

Prerequisites

WARNING:

Before doing any service work, shut off

the medium to the valve. Remove and

cap the air line to the valve actuator to

prevent personal injury and equipment

damage.

Installation

Disassembly

1. With a screwdriver or a 1/4-inch (6 mm) nut

driver, loosen the two #8-16 lower housing

screws that clamp the actuator to the bonnet.

See Figure 1.

2. Using two open-end wrenches, loosen the stem

locknuts.

Summary of content (3 pages)

PAGE 1
Installation Instructions Document No. 129-187 September 25, 2009 VP 658 and VE 339 Three-way Powertop Valves Rebuild/Repack Kit Troubleshooting Product Description Problem This rebuild/repack kit contains the parts necessary to replace the stem packing and the stem and throttling plug assembly on one Powertop three-way valve. Using this kit will convert previous models of VP 658 to Model 5 and previous models of VE 339 to Model 4. Contents Part Qty. Part Qty.
PAGE 2
Document No. 129-187 Installation Instructions September 25, 2009 NOTE: Installation, Continued The old lower seat must not be used with the stem assembly provided in this kit. 6. Pull the stem and throttle plug assembly out of this opening. 7. Using an adjustable wrench, remove the cap from the bonnet. Keep the cap. 8. Remove and discard all packing. See Figure 3 which shows the various packing configurations you will find depending on the model of the valve. Do not reuse any of these components.
PAGE 3
Document No. 129-187 Installation Instructions September 25, 2009 6. Place the second O-ring retainer into the bonnet with the tapered surface facing up. Slip the small O-ring and the backup ring over the stem threads onto the smooth portion of the stem. With the repacking tool push both down into the cavity of the O-ring retainer. Installation, Continued 7. Slide the large O-ring into the bonnet cavity. Slide the copper washer onto the stem and place the cap over the stem. Thread the cap onto the bonnet.