Flowserve NAF-Setball Manuale utente

NAF-Setball ball sector valve

Maintenance and installation instructions

List of spare parts

Fi 41.51(7)GB

08.11

Contents

SAFETY

General 1

Lifting 2

Receiving inspection 3

Installation 4

Flange gaskets 5

Starting up 6

List of materials and spare parts 7

Ordering of spare parts 8

Maintenance 9

To remove the valve from the pipework 9.1

To change the stem seal of O-ring type 9.2

To inspect and change the upper stem sealing,

Boxpacking 9.3

To inspect and change the upper stem sealing,

Boxpacking Zebra-CL™ 9.4

To inspect and change the upper stem sealing,

Boxpacking Safeguard 9.5

To change the gasket at the lower stem 9.6

To inspect and change the primary and secondary

exhaust fuse 9.7

Fitting the actuator to the valve 10

SAFETY

- Assess all the risks to eliminate the risk of personal

injury and material damage. Read these instructions

thoroughly!

- Always use the necessary protective equipment

and comply with applicable safety directives when

working with hazardous or hot/cold medium.

- Never operate a valve without ﬁrst ensuring that there

is no risk of crush injuries. The risk is highest with

automatic valves.

- Take necessary safety precautions to prevent

unintentional manoeuvre - i.e to atmosphere.

- Never dismantle a valve or part of a valve without

ensuring that the line is free of pressure and any

content.

- Always check that the valve type and material is

suitable for its intended use. This applies especially to

highly oxidising and corrosive medium. Observe also

the risk of erosion and explosion as well as decaying

medium. If in doubt, always request a written

recommendation from NAF AB.

1. General

The instructions and list of spare parts as follows

are applicable to NAF-Setball ball segment valves in

accordance with data sheet Fk 41.51GB and Fk 41.54GB.

The product codes of NAF-Setball valves are as follows:

878XEX-XXXX -XX

2. Lifting

All lifting must be carried out

in the valve itself and not in the

actuator. The joint between the

valve and the actuator is de-

signed principally for carrying

the operating torque and the

deadweight of the actuator - see

Fig. 1.

Fig.1 Lifting of the valve

3. Receiving Inspection

All valves leaving our works are inspected and tested in

accordance with the relevant requirements or in accordan-

ce with the special conditions speciﬁed by the purchaser.

Valves equipped with actuators are subjected to functional

testing and are adjusted in such a manner that every unit

is completely ready for direct installation in the pipework.

However, in view of damage that may have occurred

during transport, it is advisable that receiving inspection

is carried out, if possible.

We suggest the following inspection procedure:

- Check that the valve delivered is correct in

terms of type, size, equipment, etc.

- Examine the valve, actuator and valve positioner

regarding possible damages.

- Check the settings of the limit stops.

4. Installation

Before installing the valve, ensure that the pipework is

free from impurities, that the pipe ends between which

the valve is to be installed are parallel and are correctly

aligned, and that the distance between the pipe ends

corresponds to the valve length, including gaskets. The

valve must not be used for drawing together or aligning

incorrectly run pipes as this will cause needless loads

on the valve and pipe which may lead to severe damages

during operation. See Fig. 3.

Wrong installation Correct installation

Fig. 3. Ensure that the pipe ends align and have the

correct distance

NAF-Setball valves should be installed in the direction

of ﬂow which is shown by an arrow on the valve body.

We also recommend that the valve is mounted with

the stem pointing vertically upwards when the valve is

installed in a horizontal run of pipe.

The pipes should be supported on each side of the

valve in order to relieve the valve from loads and avoid

vibrations.

Locate the valve so that it will be easily accessible for

inspection and service, particularly if the valve is equipped

with a pneumatic actuator and valve positioner.

5. Flange Gaskets

Gaskets with sizes according to ANSI B16.5, Table E1

Figure E2, SS 359 or DIN 2690 are recommended.

6. Starting up

Before starting up, ﬂush the pipework - with all valves

in the open position - so that any impurities that may

damage the sealing surfaces of the valve and impede its

operation will be ﬂushed away.

7. List of Materials and Spare Parts

Item Qty Part Material Sealing type

1 1 Body EN1.4408/CF8M

2 1 Ball sector EN1.4408/CF8M hard

chrome plated

01, 02, 05, 06, 07

2 1 Ball sector EN1.4408/CF8M 11, 12, 15, 16, 17

3 1 Key Steel

4 1 Stem, lower EN1.4460

5 1 Gland cover EN1.4408/CF8M 01, 02, 05, 06, 11,

12, 15, 16

6 1 Bottom cover EN1.4408/CF8M

7 1 Gasket Graphite

8 1 Locking segment EN1.4436

9 1 Bearing seat EN1.4460

10 1 Compr ring EN1.4436

11 1 Seat ring Alloy 6 01, 02, 05, 06, 07,

0A, 0B

12A 1 Seat seal PTFE 01, 05, 07, 11, 15,

17, 1A, 1B

12B 1 Seat seal EPDM 02, 12

12C 1 Seat seal FPM 06, 16

13A 1 O-ring EPDM 01, 02, 11, 12

13B 1 O-ring FPM 05, 06, 15, 16

14 1 Backing ring PTFE 01, 02, 05, 06, 11,

12, 15, 16

15A 1 O-ring EPDM 01, 02, 11, 12

15B 1 O-ring FPM 05, 06, 15, 16

16 1 Gland cover EN1.4408/CF8M 07, 17,

17 2 Bolt A4 07, 17, 0A, 0B,

1A, 1B

18 2 Nut A4 07, 17, 0A, 0B,

1A, 1B

19A 1 Boxpacking

Zebra-CL™

V-ring PTFE 0A, 1A

19B 1 Boxpacking

Safeguard

V-ring PTFE

liveloaded

0B, 1B

19C 1 Boxpacking Graphite 07, 17

20 4 Bolt A4

21 2 Bolt A4 01, 02, 05, 06, 11,

12, 15, 16

22 1 Stem, upper EN1.4460

23 1 Indicating pin SS

24 1 Cup spring EN1.4310 0B, 1B

26 1 Washer A4

27 1 Thread insert Stainless

28 1 Bolt A4

29 1 Seat ring / Back-up

ring

PTFE/SS 11, 12, 15, 16, 17

30 1 Stem bearing Metaloplast

31 1 Stem bearing Metaloplast

32 1 Washer A4

33 1 Cylindrical pin EN1.4460

34 1 Washer Metaloplast

35 1 Keyway ring Stainless

B, C

7 20

19C

19A

19B

Fig. 4. NAF-Setball - spare parts, types of stem sealings and seat rings

With O-oring sealing With springloaded sealingring

Type -02, -06 Type -01, -05, -07

Seat ring

Materials

O-ring sealing

Type -01, -02, -05, -06

Stem sealing

Boxpacking: Type -07, -17

O-ring sealings: Type -01, -02,

-05, -06, -11, -12, -15, -16

Zebra-CL™: Type 0A, 1A Safeguard: Type 0B, 1B

Earlier performance until 1991.

8 Spare Parts

When placing orders for spare parts, specify:

1. Product code of the valve - incl. DN according to

Fk 41.51 and Fk 41.54 and the Manuf. No.

speciﬁed on the identiﬁcation plate of the valve.

2. Description of the part, its item No and quantity

required. See table section 7.

Ordering example: NAF 8780EB-0100-02,

manuf. No. 1234567,

Seatring item 11

Quantity 1 pc.

9. Maintenance

Many valves are installed in such locations that their

performance is of vital importance to the entire process.

Such valves should be inspected regularly and any faults

should immediately be corrected.

Exhaust fuse

The primary exhaust fuse consisting of bearing seat (9)

and locking segment (8) and the secondary exhaust fuse

consisting of washer (26) and bolt (28) should always be

inspected during maintenance. See section 9.7.

In older valves, before 1992, a keyway ring (35) can be

mounted as the secondary exhaust fuse instead of the

washer (26) and bolt (28). The design with keyway ring is

no longer a part of our product range. If it needs to be

changed a new stem must be mounted.

To ensure the safety of the valve the primary and secon-

dary exhaust fuse must be correctly mounted.

Stem sealing

The stem sealing should be changed regularly and in

intervals that are in proportion with the use of the valve.

9.1 To remove the valve from the pipework

Ensure that the valve is free of pressure.

The procedure is as follows:

1. Ensure that the recommended spare parts and

the gaskets for the pipe ﬂanges are available.

2. Close the valve.

3. Shut off all compressed air connections

and isolate all electrical connections to the

actuator.

4. Disconnect all compressed air lines and electric

cables connected to the actuator.

5. Release the ﬂanged joint between the valve

and the pipework. Then lift out the valve. Don’t

use the actuator for lifting. Apply all lifting

forces to the valve itself and not to the actuator

- see ﬁg. 1.

Note the ﬂow direction which is shown by an

arrow on the valve body.

9.2 To change the stem seal of O-ring type.

The upper o-ring (13) should be changed if the upper

stem sealing is leaking.

Ensure that the valve is free of pressure.

1. Dismount the actuator.

2. Remove the key.

3. Loosen the bolts (21) and remove the gland

cover (5).

Then remove the o-rings (13) and (15) as well as

the washer in PTFE (14).

Inspect the primary and secondary exhaust

fuse, see section 9.7.

4. Clean and inspect all easily accessible surfaces.

The surfaces must be completely free from

scratches. Remove any burrs from the keyways.

5. Replace the two o-rings (13) and (15) as well as

the washer in PTFE (14). Grease the o-rings with

suitable silicone grease.

6. Mount the gland cover (5) with the bolts (21).

9.3 To change and inspect the upper stem seal,

boxpacking

The sealing requires inspection and adjustment when it

has been taken into operation.

Ensure that the valve is not under pressure.

1. Dismount the actuator.

2. Remove the nuts (18). Lift off the gland

cover (16). Then remove the boxpacking (19C).

Inspect the primary and secondary exhaust

fuse, see section 9.7.

3. Clean the surfaces of the stem, gland cover (16)

and the recess in the valve body.

4. Carefully examine the stem surface to make sure

that it is completely free from marks and

scratches.

5. Replace the boxpacking (19C) with a new one.

Then mount the gland cover (16) and the

nuts (18).

6. Tighten the nuts (18) until the boxpacking gets in

place and is in contact with both the stem and

valve body. Check the tightness of the packing

and retighten the nuts (18) – if necessary - when

the valve is taken into operation.

9.4 To inspect and change the upper stem sealing,

Boxpacking Zebra-CL™

The sealing requires inspection and adjustment when the

valve is taken into operation.

Ensure that the valve is free of pressure.

1. Dismount the actuator.

2. Remove the nuts (18). Lift off the gland cover

(16). Then remove the boxpacking (19A) and

the o-ring (13).

Inspect the primary and secondary exhaust

fuse, see section 9.7.

3. Clean the stem surfaces, gland cover (16) and

the recess in the valve body.

4. Inspect the stem surface thoroughly. It should be

free from marks and scratches.

5. Lubricate the stem with suitable lubrication.

6. Replace the packing (19A) and the greased

o-ring. Then mount the gland cover (16) and

nuts (18).

7. Tighten the nuts (18) until the boxpacking gets in

place and is in contact with both the stem and

valve body. Check the tightness of the packing

and retighten the nuts (18) – if necessary - when

the valve is taken into operation.

9.5 To inspect and change the upper stem sealing,

Boxpacking Safeguard

The sealing requires inspection and adjustment when the

valve is taken into operation.

Ensure that the valve is free of pressure.

1. Dismount the actuator.

2. Remove the nuts (18) and the cup spring (24).

Lift off the gland cover (16). Then remove the

boxpacking (19B) and the o-ring (13).

Inspect the primary and secondary exhaust

fuse, see section 9.7.

3. Clean the stem surfaces, gland cover (16) and

the recess in the valve body.

4. Inspect the stem surface thoroughly. It should be

free from marks and scratches.

5. Lubricate the stem with suitable lubrication.

6. Replace the boxpacking (19B) and the greased

O-ring (13). Then mount the gland cover (16)

and nuts (18).

7. Tighten the nuts (18) until the boxpacking gets in

place and is in contact with both the stem and

valve body. Check the tightness of the packing

and retighten the nuts (18) – if necessary - when

the valve is taken into operation.

9.6 To change the gasket at the lower stem

1. Remove the bolts (20) and the cover (6).

2. Carefully pull out the stem (4) and remove the

bearing in metaloplast (31) and the gasket (7).

Inspect the primary and secondary exhaust

fuse, see section 9.7.

3. Carefully clean the inside of the cover (6) and the

stem (4).

4. Replace the gasket (7) with a new one.

5. Mount the stem (4) with the gasket (7).

6. Fit the cover (6) and tighten the bolts (20).

9.7 To inspect and change the primary and

secondary exhaust fuse.

The locking devices requires inspection after long operating

time and/or many cycles.

1. Remove the cover (6).

2. Carefully pull out the lower stem (4) and remove

the bearing in metaloplast (31) and the

gasket (7).

3. Loosen the bolt (28) and remove the

washer (26).

4. Carefully pull out the upper stem (22) and

remove the stem sealings and bearing.

5. Inspect the bearing seat (9), locking segment (8),

washer (26) and bolt (28). Replace them if they

are worn out.

6. Remount the stem (22), washer (26) and bolt

(28).

7. Grease and remount the locking segments (8) and

bearing seat (9). Ensure that it is properly placed

over the locking segments.

8. Mount the bearing and gland cover.

NAF AB

SE-581 87 Linköping

Telephone +46 13 31 61 00

Facsimile +46 13 13 60 54

e-mail [email protected]

Website: www.naf.se

We reserve the right to design modiﬁcations

without prior notice

ISO 9001 Certiﬁed

10. Fitting the Actuator to the Valve

1. The actuator can be mounted directly on the

valve. The mounting ﬂange and the valve stem

follow the NAF standard for securing the

actuator.

2. Turn the valve to the closed position. The key

should face towards the inlet.

3. Fit the actuator.

4. Connect the compressed air supply to the

actuator - applies to pneumatic actuators.

If the end position stop is correctly set, the ball

segment will not move when compressed air

pressure is applied.

5. If moving - adjust the end position stop until the

actuator has turned the ball segment to the

closed position.

6. General

The actuator may be ﬁtted either in line with the

connected pipes or transversely to them. An

intermediate plate is necessary for mounting the

actuator in line with the pipework.

N.B. The direction of closure must always be

clockwise, as viewed from the actuator.

Before ﬁtting the actuator, it is important to ensure that

the actuator ﬁts the stem. First try without key to check

that the drive slips onto the stem. Also check that the

key ﬁts and matches the keyways in the stem. Grease the

actuator stem entry. Push the actuator onto the stem.

The rotary movement of the ball sector should be

restricted to 90°, which is the movement needed between

fully open and fully closed position. If the sector is turned

beyond this range, the sealing surfaces of the sector and

seat ring may be damaged. When an attempt is made to

turn the ball sector back to the correct position the sector

may jam against the seat ring.

In practice, this is prevented by the indicating pin. It will

come in contact with the bolts retaining the top cover if an

attempt is made to turn the ball sector outside the range

between fully open and fully closed position.

When adjusting the actuator, make sure that the sphere

of the ball sector (2) is centered against the seat ring (11)

in closed position, i.e. that the sphere projects equally on

both sides of the seat ring as shown in Fig. 5.

Fig. 5. Locating of the ball sector sphere when

adjusting the actuator

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