Pfeiffer 14t Series Maintenance

Brand: Pfeiffer

Model: 14t Series

Type: Maintenance

Pfeiffer

Chemie-Armaturenbau GmbH

Page 1 of 4

Maintenance

Series 14t Butterfly Valve

Fig. 1 - Series 14t Butterfly valve

0. Introduction

These instructions are intended to assist

the user on assembling and repairing

Series 14t Butterfly Valves.

Specifications are subject to change

without notice. The text and drawings do

not necessarily display the scope of

supply or any ordering of spare parts.

Drawings and graphics are not to scale.

Customer-specific designs not in

accordance with our standard product

range are not shown.

These instructions may only be passed on

to third parties with written approval of

Pfeiffer Chemie-Armaturenbau GmbH.

All documents are protected by German

The transmission and/or duplication of

documents, even excerpts, as well as the

use and communication of their content is

not permitted unless expressly granted.

Offenders will be liable for payment of

damages.

All rights to exercise industrial property

rights are reserved.

The equipment may only be dismounted and

disassembled by skilled staff who are familiar with

the assembly, the start-up and the operation of this

product.

Skilled staff in the sense of these repair and assembly

instructions are persons who, as a result of their training, their

knowledge and their experience, as well as their knowledge of

the relevant standards, are able to judge the tasks assigned to

them and are able to recognize possible dangers.

1. Design, operation and dimensions

Design, operation and dimensions as well as all further technical

details can be found in the Data sheet < TB 14t_EN >.

2. Installation, start-up and maintenance

Guidelines for the installation, start-up and maintenance are to be

found in the operating instructions

< BA 14b-01_EN > for automatic butterfly valves

< BA 14b-02_EN > for hand-operated butterfly valves

Fig 2 - Sectional view of Series 14t Butterfly Valve => Parts list, see page 2

Butterfly Valve

Series 14t

Page 2 of 4

Item Description Material

1 Valve body 1.0619 / 1.4370

2 Valve shaft 1.4542

3 Butterfly disc 1.4408

4 Seat ring 1.4571 / Graphite

5 Fastening ring 1.4404

6 Straight pin 1.4542

7 Guide washer 1.4404

8 Shaft head 1.4542

9Screw A2-70

10 Feather key 1.0531

11 Ring Carbon graphite

12 Screw A2-70

13 Bearing bushing 1.4401 / hard-chrome plated

14a Spacer 1.4301

15 Stuffing box 1.4404

16 Nut A2-70

17 Thrust washer 1.4404

18 Bonnet 1.4404

19 Screw A2-70

20 Counter washer 1.4404

21 Ring Carbon graphite

22 Packing PTFE

23 Stud bolt A2-70

Fig. 3 - Explosion drawing of the Series 14t Butterfly valve

Table 1 - Parts list

3. Assembly of the butterfly valve

3.1 Preparation for the assembly

Before assembling the valve, carefully clean all parts and place

them on a soft surface (rubber mat or similar).

Note! Plastic parts are nearly always soft and very

sensitive. Take particular care when handling the

sealing surfaces to ensure that they do not get

damaged.

Caution! A high-performance grease paste is used

during manufacturing to prevent the screws from cold

welding in the bodies (e.g. Gleitmo 805 by Fuchs).

Do not use this lubricant with valves intended for oxygen service.

Use a lubricant suitable for valves that are free of grease,

especially for oxygen service.

Note: The position and arrangement of the individual

parts shown in the exploded view diagrams must be

adhered to on assembling the valve.

Pfeiffer

Chemie-Armaturenbau GmbH

Page 3 of 4

3.2 Pre-assembling the valve body

Place the valve body ( 1 ) on a surface at a suitable working height.

Screw the stud bolts ( 23 ) into the valve body ( 1 ).

Use a suitable mandrel to press the bearing bushing ( 13a ) as far

as it will go into the shaft bore of the valve body ( 1 ) on the stuffing

box side.

Insert the spacer ( 14a ).

Use a suitable mandrel to press the bearing bushing ( 13b ) far as it

will go into the shaft bore of the valve body ( 1 ) on the bonnet side

Insert the spacer ( 14b).

3.3 Butterfly disc and shaft

The butterfly disc ( 3 ) and shaft ( 2 ) form a unit which is easily

assembled together using the straight pins ( 6 ). This unit can be

taken apart for assembling it into the valve.

Note:

It is important that both these components are used

together.

3.4 Assembling the butterfly disc, shaft and valve body

Place the butterfly disc ( 3 ) with the sealing side facing

downwards on a surface at a suitable working height.

Place the valve body ( 1 ) with the facing side upwards carefully

over the butterfly disc, ensuring that the disc is located neatly in the

port of the body.

Caution: Take particular care to make sure that facing of

the valve body and the butterfly disc do not get damaged.

Note: Make sure that the bearing holes on the butterfly

disc ( 3 ) are aligned with the shaft bore of the valve

body ( 1 ).

Observe the eccentricity of the butterfly disc.

Push the shaft ( 2 ) through the shaft bores of the valve body ( 1 )

and through the bearing holes of the butterfly disc ( 3 ).

Insert the straight pins ( 6 ) into the butterfly disc and shaft.

3.5 Assembling the butterfly valve

Slide the guide washer ( 7 ) on the bonnet side over the shaft until it

touches the ready installed spacer ( 14b ).

Fasten the shaft head ( 8 ) to the end of the shaft with the screw

( 9 ).

Push the ring ( 21 ) onto the bonnet ( 18 ).

Insert the washer ( 20 ) into the recess in the bonnet ( 18 ) intended

for it.

Place the ready-assembled bonnet into the shaft bore of the valve

body and align it using the screws ( 19 ).

Tighten the screws evenly in a criss-cross pattern.

Slide the thrust washer ( 17 ) on the stuffing box side over the free

end of the shaft at the corresponding place in the valve body.

Slide the rings of the PTFE packing ( 22 ) one by one over the shaft

into the shaft bore of the body and press them in using an

installation sleeve.

Note: Make sure that the packing rings are inserted with

their divisions not aligned with one another.

Place the stuffing box ( 15 ) neatly over the shaft. Insert the stud

bolts and align them using the nuts ( 16 ) and washers.

Tighten the nuts evenly in a criss-cross pattern.

3.6 Final assembly of the butterfly disc

Turn the valve body by 180° so that the facing of the butterfly disc

faces upwards.

Insert the ring ( 11 ) into the groove of the ready-assembled

butterfly disc ( 3 ).

Caution:

Pay particular attention to cleanliness.

Push the seat ring ( 4 ) onto the fastening ring ( 5 ).

Caution:

Refer to the exploded view diagram in Fig. 3 for location

of the seat ring ( 4 ).

Place this ready-mounted fastening ring on the butterfly disc and

adjust its position using the screws ( 12 ).

Caution:

Do not damage the facings.

Fasten the fastening ring by tightening the screws evenly and in a

criss-cross pattern.

Insert the feather key ( 10 ) into the groove of the shaft ( 2 ).

Carefully bring the butterfly disc into the closed position.

3.7 Note concerning the mounting of actuators

Caution: Triple eccentric butterfly valves must always

close in the clockwise direction!

Page 4 of 4Issue April 2008 Maintenance EB 14t_EN

PDF=734

Pfeiffer

Chemie-Armaturenbau GmbH

For your special requirements please contact our technical sales department.

Values subject to change

Pfeiffer Chemie-Armaturenbau GmbHPfeiffer Chemie-Armaturenbau GmbH

Pfeiffer Chemie-Armaturenbau GmbH

Hooghe Weg 41 • 47906 Kempen • Germany

Telefon: +49 2152 2005 - 0 • Fax: +49 21 52 1580

E-Mail: [email protected] • Internet: www.pfeiffer-armaturen.com

Observe the direction of rotation on mounting the actuator!

The label on the valve indicates the direction of rotation.

Fig. 4 – Label indicating the direction of rotation

Assembly of the butterfly valve is now completed.

4. Troubleshooting

Refer to section 7 of Operating Instructions

< BA 14b-01_EN > for automated butterfly valves or

< BA 14b-02_EN > for manually operated butterfly valves.

5. Repair of the butterfly valve

5.1 Replacing the packing

If a leak is detected at the shaft bore, the packing ( 22 ) may be

defective.

We recommend checking the condition of the packing.

To remove the packing, disassemble the valve in reverse order to

that described in section 3.

Check the rings of the packing and all plastic parts for damage. In

case of doubt, replace the parts with new ones.

5.2 Replacing the seat ring

If the butterfly valve does not shut off tightly, the seat ring ( 4 ) may

be defective.

We recommend checking the condition of the seat ring.

To remove the seat ring, disassemble the valve in reverse order to

that described in section 3.

Check the seat ring as well as all plastic parts for damage. In case

of doubt, replace the parts with new ones.

5.3 Further repair work

In case of severe damage, we recommend the repair work to be

carried out by Pfeiffer.

6. Customer inquiries

Should you have any inquiries, please submit the following details:

1. Order number (on the nameplate)

2. Type, product number, nominal size and version of the valve

3. Pressure and temperature of the process medium

4. Flow rate in m³/h

5. Installation sketch, if possible

Pfeiffer 14t Series Maintenance

Brand: Pfeiffer

Model: 14t Series

Type: Maintenance

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Pfeiffer 14t Series Maintenance

Pfeiffer 14t Series Maintenance

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