Flowserve NAF-Setball Bedienungsanleitung
1
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.
2
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
12
10
11
2
B, C
12
10
11
2
A
10
2
12
29
1
7 20
6
4
22
3
23
30
33
2
31
34
32
23
16
9
17
18
19C
8
21
5
15
27
2
26
28
14
13
16
19A
18
17
98
19B
9
18
17
24
16
8
3
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.
4
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.
5
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.
3
2
11
6
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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