AVK 820 SERIES Installation and operating instructions

1. INTRODUCTION
To guarantee the benefits of the butterfly valves, proper procedures and
compliance with this installation instruction are essential. The installation
must be carried out according to good installation practise and only by
qualified personnel. AVK reserves the right to decline responsibility for
damage or failure caused by non-compliance with the recommendations
in this instruction.
Please note that fluid residues inside the butterfly valve may be dangerous to
people and to the environment. The butterfly valve must be handled with the
necessary precaution and must be carefully cleaned prior to maintenance.
Any kind of maintenance is performed on the user´s own risk and must be
executed by trained staff only. Only original spare parts must be used.
Dimensions, materials and application of the butterfly valves are according to
series 820 datasheets.
2. MARKING
Label:
• Manufacturer
• Product specification
• Item number
• Material specification
• Internal order number
3. STORAGE
AVK butterfly valves must always be stored free from dust and humidity.
The valve is supplied with the disc slightly open and must remain so until the installation is
completed (fig. 1).
Butterfly valves supplied with a single acting spring closing pneumatic actuator must be
stored with disassembled actuator to avoid a permanent deformation of the liner. The
actuator is mounted after installation of the valve in the piping.
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820
COPYRIGHT©AVK GROUP A/S 2014 - AVK INTERNATIONAL A/S, BIZONVEJ 1, DK-8464 GALTEN - WWW.AVKVALVES.EU MI Butterfly820 rev. C August 2017 GB
FIG. 1

INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820
4. PRECAUTIONS TO BE TAKEN PRIOR TO INSTALLATION
Please make sure that the valve is suitable for the prevailing service conditions. The plant manager is responsible for using the
right valve (with regards to corrosion resistance, pressure, temperature, etc.)
for the actual fluid. Contact your supplier or AVK if you need any assistance.
Please consider that turbulence (i.e. created by a pipe bend) generates hydro dynamic forces which increases the operating
torque of the valve. We recommend to install the valve minimum 5 x DN after
pipe fittings.
5. CHECK BEFORE INSTALLATION
Positioning:
In horizontal pipelines, we recommend that the valve is
installed with its shaft in a horizontal position. Please ensure
that the lower edge of the disc opens with the direction of the
flow. This prevents residues and contamination in the shaft
sealing area (fig. 2).
Gaskets:
Never use gaskets nor grease (fig. 3).
6. INSTALLATION
The flange face surfaces must be smooth and clean. Rust, welding slags, remains of paint, dirt etc. must be removed in order to
prevent damage of the valve gasket.
The wafer butterfly valves are suitable for installation between standard DIN PN10/16 or ANSI150 flanges. For installation of
valves between flanges of other standards, please consult AVK or its authorised distributors.
The valve should not be mounted directly in pipes, where the actual bore dimension is smaller than the nominal bore dimension
of the valve. In such cases, spacer rings should be fitted between flanges and valve to prevent damage to the disc when open-
ing (fig.4). The valve should never be installed between flanges which are not parallel to each other. Make sure that pipes and
valves are installed concentric as the disc of a misaligned valve may be damaged (fig.5). Furthermore, it is absolutely inadmis-
sible to carry out any welding on the piping while the valve is mounted between the flanges. This would damage the liner of the
valve.
For easy installation the flanges have to be positioned properly and the disc must be partially open (fig. 6). If the flanges are not
positioned properly the liner may be damaged or rolled outside the body flanges.
Set all stay-bolts by keeping the disc slightly open and do not tighten the nuts (fig. 7). If the stay-bolts are tightened when the
disc is closed, the liner will be compressed in a wrong position. This will result in a high closing torque and leakage.
Open the disc completely (fig. 8). Ensure that the piping is aligned. Tighten diagonally opposite the nuts.
Page 2/6 MI Butterfly820 rev. C August 2017 GB
FIG. 4 FIG. 5 FIG. 6 FIG. 7 FIG. 8
Fig. 2 Fig. 3

7. FUNCTION TEST
We recommend to make a function test before use. Therefore, the valve must be opened and closed at least once in
order to check that the disc does not touch the flanges and that the valve is tight through the passage.
If a pressure test of the complete piping system is being carried out, it is very important that the testing pressure is not
higher than the nominal pressure of the valve. An overpressure may damage the valve.
8. CLEANING OF THE PIPING
When cleaning the piping system, it is very important to ensure that the cleaning products and devices are harmless to
the valve.
9. FLANGE INSIDE DIAMETER
The butterfly valve must be mounted between flanges without gasket. It has bidirectional tightness. It is centered by
use of stay-bolts or screws. The diameter of the flange should be in accordance with the stated values ”Dopt”,
”Dmin” and ”Dmax”.
Dmin: Minimum diameter of the flange enabling move of the disc (in case of a perfectly centered valve)
Dopt: Diameter of the flange for optimal mounting
Dmax: Maximum diameter of the flange
DN 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 900 1000 1200 1400 1600
Dmin 19 32 35 53 74 93 119 147 198 247 297 340 384 425 490 585 680 790 880 980 1175 1348 1560
Dopt 34 42 53 68 83 103 128 153 202 253 303 345 395 453 505 605 696 810 900 997 1195 1387 1602
Dmax 47 57 68 87 104 126 154 174 226 277 328 370 421 462 514 617 715 817 918 1019 1225 1430 1640
10. INSTALLATION END OF LINE
When mounting the valve at the end of a line, please note:
Valve type: Lug type possible without counter flange
U-section type only with counter flange
Medium: Only for liquids, 10÷30ºC
Max. working pressure: DN 25-200 10 bar
(with 16 bar disc): DN 250-600 6 bar
DN 700-1400 2,5 bar
- no water hammer !!!
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820
Page 3/6 MI Butterfly820 rev. C August 2017 GB

Page 4/6 MI Butterfly820 rev. C August 2017 GB
n = number of bolts for one valve
n = number of bolts for one valve
n = number of bolts for one valve
11. BOLTING
Wafer and U-section body DN 25 - 400
A BOLT WITH NUT
Wafer and U-section body DN 450 - 1600
B STAY-BOLT WITH 2 NUTS AND C BOLT
valve
LUG type DN 50 - 400
C BOLT
25 30 4 M10x 80 4 M12x 90 4 M12x 90
32 30 4 M12x 80 4 M16x100 4 M16x100
40 33 4 M12x 90 4 M16x100 4 M16x100
50 43 4 M12x100 4 M16x110 4 M16x110
65 46 4 M12x100 4 M16x110 8(4) M16x110
80 46 4 M16x110 8 M16x120 8 M16x120
100 52 4 M16x120 8 M16x120 8 M16x120
125 56 8 M16x120 8 M16x130 8 M16x130
150 56 8 M16x120 8 M20x140 8 M20x140
200 60 8 M16x130 8 M20x150 12 M20x150
250 68 12 M16x140 12 M20x160 12 M24x170
300 78 12 M20x160 12 M20x170 12 M24x180
350 78 12 M20x160 16 M20x170 16 M24x190
400 102 16 M20x190 16 M24x200 16 M27x220
450 114 16 M24x240 8 M24x60 16 M27x260 8 M27x 70
500 127 16 M24x260 8 M24x60 16 M30x290 8 M30x 80
600 154 16 M27x300 8 M27x70 16 M33x330 8 M33x 90
700 165 20 M27x320 8 M27x80 20 M33x340 8 M33x 90
800 190 20 M30x360 8 M30x80 20 M36x380 8 M36x100
900 203 24 M30x370 8 M30x80 24 M36x410 8 M36x100
1000 216 24 M33x400 8 M33x90 24 M39x450 8 M39x120
1200 254 28 M36x470 8 M36x110 28 M45x550 8 M45x150
1400 280 32 M39x530 8 M39x120 32 M45x580 8 M45x150
1600 318 40 M45x600 8 M45x140 40 M52x680 8 M52x180
PN 6 PN 10 PN 16
A A A
DN C n M x L n M x L n M x L
PN 10 PN 16
B C B C
DN C n M x L n M x L n M x L n M x L
50 43 8 M16x30 8 M16x30
65 46 8 M16x40 8 M16x40
80 46 16 M16x40 16 M16x40
100 52 16 M16x40 16 M16x40
125 56 16 M16x50 16 M16x50
150 56 16 M20x50 16 M20x50
200 60 16 M20x50 24 M20x50
250 68 24 M20x60 24 M24x60
300 78 24 M20x60 24 M24x60
350 78 32 M20x60 32 M24x60
400 102 32 M24x70 32 M27x80
PN 10 PN 16
C C
DN C n M x L n M x L
C
B C
A
WAFER U-SECTION
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820

INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820
12. MAX. OPERATING TORQUES
Incl. safety factor Max. working pressure [bar]
DN Top flange/shaft 2,5 6 10 16 20
25-40 F05-08 Diamond - - - 23 28
50 F05-11 Diamond - - - 41 53
65 F05-11 Diamond - - - 45 58
80 F05-11 Diamond - - 53 69 89
100 F07-11 Diamond 41 - 76 88 113
125 F07-14 Diamond 61 - 92 153 197
150 F07-14 Diamond 73 - 122 165 213
200 F07-17 Diamond 108 - 203 294 382
250 F10-22 Diamond 188 - 265 354 461
300 F10-22 Diamond 276 - 448 529 687
350 F12-22 Diamond 369 506 800 972 1264
400 F12-27 Diamond 786 1071 1191 1488 1935
450 F14-45 round+key 1185 1659 1985 2454 3191
500 F14-45 round+key 1422 1850 1995 2732 3552
600 F16-70 round+key 2624 3113 3740 5468 7108
700 F25-70 round+key 2843 4010 5212 6197 -
750 F25-70 round+key 3281 4717 5832 7290 -
800 F25-70 round+key 3555 4739 6120 6738 -
900 F30-80 round+key 4648 5924 7564 9477 -
1000 F30-80 round+key 5924 7472 9477 11482 -
1100 F30-80 round+key 7655 9569 11846 14033 -
1200 F30-100 round+key 10024 12029 14216 17132 -
1400 F30-120 round+key 12575 18225 27724 - -
1600 F35-130 round+key 16767 24239 44834 - -
13. KV VALUES M3/H
Opening angle of the valve
DN 20° 30° 40° 50° 60° 70° 80° 90°
32 - 1,5 5 10 15 26 34 40
40 - 2,7 8,5 16 25 37 46 50
50 2 7 15 28 45 68 88 100
65 3 11 24 48 85 138 180 210
80 8 22 50 83 134 230 312 360
100 15 35 70 130 225 410 585 650
125 28 70 135 230 360 600 920 1050
150 33 95 205 320 580 980 1410 1620
200 60 175 355 580 910 1600 2450 2800
250 132 340 590 940 1480 2550 3950 4480
300 200 505 890 1450 2100 3800 5960 6800
350 280 680 1200 2050 3150 5050 8100 9200
400 365 860 1500 2490 3980 6600 10200 11700
450 465 1080 1900 3150 5050 8700 13300 15200
500 580 1200 2300 3740 6150 11000 16800 18900
600 820 1600 2780 5200 8940 14500 23500 26800
700 890 2050 3450 6050 11050 18800 31500 37100
800 1300 2550 4950 8750 14200 23500 39500 48500
900 1650 3300 6400 11800 19400 31500 52500 61300
1000 2150 4250 8200 15100 23500 39400 65500 80500
1200 4000 7500 12500 19800 34000 55400 98300 119200
1400 5200 10120 18200 32500 51500 89500 142000 162000
1600 7100 14210 26050 45000 71200 118500 196200 228500
Page 5/6 MI Butterfly820 rev. C August 2017 GB
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820

14. REMOVAL FROM THE LINE
Before removing the valve from the pipe it is very important to be aware that dangerous fluids may leak and that necessary
precautions must be taken.
Be careful not to damage disc and liner when removing the valve from the pipe.
2.1 Do not close the valve completely.
2.2 Loosen all bolts.
2.3 Use flange spreaders and remove the valve.
15. DISASSEMBLY
3.1 Open the valve completely.
3.2 Remove the actuator.
3.3 Unlock screws and remove the retaining washer.
3.4 Remove the shaft (either by using an extractor or by tightening the sqare of the shaft in a vice).
3.5 Remove the disc.
3.6 Loosen the liner at a point, squeeze until it is heart-shaped and remove the liner.
16. REASSEMBLY
4.1 Clean all parts. If possible, use a silicone spray or similar to ease the handling.
4.2 Make sure that the liner is placed with the largest diameter on the top side of the valve (the shaft diameter is
largest on the upper side).
4.3 Insert the heart-shaped liner. Place the upper side facing the shaft hole. Use the shaft to centre the liner.
Then gently expand the liner and make it adapt with the body.
4.4 Replace the disc. The square must be placed at the lower part (opposite the top of the valve).
Make sure the liner is not damaged.
4.5 Insert the shaft through the liner and disc by rotating the disc in an alternate movement to ease the operation.
4.6 The axis of the shaft square must be properly aligned with the axis of the disc. Then completely insert the shaft by
evacuating air from the lower shaft housing (slightly lift the liner using a screwdriver).
4.7 Remount the actuator.
A tightness test has to be performed before the valve is taken into use in a pipe system and has to be carried out according
to DIN 3230 part 3 or a corresponding test. The valve must also undergo a functional test. When the tests are completed,
the disc is to be placed in a slightly open position to prevent the disc edge from surpassing the flange surface. This position
must be kept until the valve has been installed.
17. PARTS LIST
1. Body
2. Disc
3. Shaft
4. Liner
5. O-ring
6. Retaining washer + 2 x screws
18. DISPOSAL
Please note that any remaining residues in the valve might be hazardous to humans or the environment. Therefore, the
butterfly valve must be handled with caution. After its use, please apply the most environmentally friendly waste
disposal methods.
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK BUTTERFLY VALVES, CENTRIC WITH LOOSE LINER
SERIES 820
Page 6/6 MI Butterfly820 rev. C August 2017 GB
3
6
5
142