Socla Sylax User manual

• Sale leaflet p.2
• Nomenclature p.3
• Overall dimensions p.4
• Top connections of the actuators p.5
• Actuators p.6
• Connecting flanges p.7-8
• Normalisation p.9
• Pressure p.10
• Torque values - Pressure/Temperature diagram p.11
• Flow rate (Kv) p.12
• Head loss chart (∆p) p.13
• Type of flange/ Tag/Traceability p.14
• Bolts and nuts p.15-17
• Installation p.18
Technical manual
Sylax butterfly valves (DN 25-350 mm)
Summary
uksylax25_350 - Updated 20/09/2016 1
Industrial processes and general services
Applications :
• Water distribution and supply with the main
European approvals, water treatment, most of
the fluids of general services.
• Industrial applications such as :
Metallurgical, mining, paper-making, shipbuil-
ding, nuclear, environmental and mechanical, food
industry (see our list of approvals).
• For special applications, especially for parti-
cularly difficult media, contact our technical
back office team.
• For vacuum and frequencies above 1 cycle /
min, the headline will be pasted.
Main characteristics :
• Multiple connections : centering lugs,
tapped lugs.
• Vertical and horizontal operating position.
• High power transmission with robust groo-
ved connection between the shaft and the
disc.
• Easy maintenance by removing the circlips
• Interchangeable disc and liner.
• Complete recyclability of the butterfly valve
• Body in cast iron GJL1040, ductile iron
GJS1030 , steel and stainless steel.
• Body epoxy coated 80 µm colour blue RAL
5017 (a lot of other coatings on option, please ask
our sales department)
• Wide choice of actuations.
Applications and main
characteristics
•
•
A mounting instruction specifying the installation characteristics and the commission of the Sylax is available on our web site
www.socla.com or on request by our sales department.

Technical manual Sylax DN 25-350 mm
Sale leaflet
By concentrating the technologies and by integrating technical solutions of the highest levels,
Socla fulfils its ambition :
• competitiveness of a standard range,
• reliability,
• comprehensive range thanks to a multiplicity of solutions.
uksylax25_350 - Updated 20/09/20162
• Safety anti-ejection circlip keeps shaft in
place and allows easy maintenance
• Safety reinforced by a secondary water-
tightness.
• Spline driven one piece shaft connected
to floating disc :
. high reliability of tightness and torque trans-
mission in the long term.
• High power transmission with robust grooved
connection between the shaft and the disc.
• Complete protection of the shaft and valve
body from fluids.
• Reliability of movements with self-lubricating
bearings.
• Identification and traceability ensured by
riveted metal tag : see on page 14.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 3
Spare parts list
Nb
DESCRIPTION
Qty
MATERIALS ACCORDING TO NORMS
Materials EN ASTM JIS
1Body 1
Ductile iron
EN GJS 400-15 (JS 1030) - FCD40
Cast iron
EN GJL 250 (JL 1040) - FC25
Steel* GE 280 (E280 - 480M) gr WCB -
Stainless steel* GX5 CrNiMo 19-11-2 (1.4408) 316 SUS 316
2Liner 1
EPDM - - -
White EPDM - - -
High content nitrile - - -
White nitrile - - -
Carboxylated nitrile - - -
CSM (Polyethylen chloro-sulfonated) - - -
Silicone - - -
FKM - - -
Buthyl - - -
Natural rubber - - -
3Disc 1
Ductile iron EN GJS 400-15 (JS 1030) - FCD40
Stainless steel GX5 CrNiMo 19-11-2 (1.4408) 316 SUS 316
Alu-bronze* CuAl10Fe5Ni5 (CC333G) - -
4Stem 1
Stainless steel X5 CrNiCuNb 16-4 (1.4542) 630 SUS 630
Stainless steel° X2 CrNiMo 17-12-2 (1.4404) 316L SUS 316L
Stainless steel X30 Cr13 (1.4028) 420 SUS 420 J2
5 - 6 Anti-friction bearing 1Zinc coated steel + PTFE - - -
7Sealing and anti-
extrusion bush
2 Plastic Grivory XE3883 black 9915 GV4 - -
8O-ring seal 1 Nitrile/FKM - - -
9Circlips 1Stainless steel X30 Cr13 (1.4028) 420 SUS 420 J2
Steel XC 75 - -
10 Identification plate 1 Aluminium EN AW - AL995 (EN AW - 1050A) - -
11 Rivet 2Alu / Stainless steel - - -
9
8
7
10
11
6
2
4
3
5
1
9
8
7
1
6
5
2
3
4
10
11
12
13 14 1516
ATEX special spare parts list
12 Braid 1 Tinned copper - - -
13 Discharge electro-static braid 1 Tinned copper - - -
14 Screw 1 Stainless steel A2 - 70 304 SUS 304
15 Stop washer 1 Stainless steel X5 CrNi 18-10 (1.4301) 304 SUS 304
16 ATEX identification plate 1 Aluminium EN AW - AL995 (EN AW - 1050A) - -
* Except DN200
° Except DN200 and 250

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016
Overall dimensions
4
H1
H2
E
D1
D2
ØT
plat P N trous ØR sur ØS
Carr
é CxC
4
ØU
H3
H4
L1
H5 H1
L5
L6
• 4 Centring lugs
(1) Ductile iron body (JS1030), ductile iron disc (JS1030), EPDM liner. - (2) Cast iron body (JL1040), ductile iron disc (JS1030), EPDM liner.
Diameter Face to
face Overall dimensions ISO Top according to ISO 5211
Square drive
outlet
Travel
of the disc
Weight
kg
DN NPS E L1 H1 H2 H4 N øR øS øT øU N° o C H3 Plat P D1 D2 (1) (2)
25 1 32 100 125 50 12 4 6,5 50 65 36 F05 11 16 11 6 1 - 1,6
32/40 1 1/2 32 144 130 57 12 4 6,5 50 65 36 F05 11 16 11 31 6,5 1,9 1,7
50 2 43 121 136 62 12 4 6,5 50 65 36 F05 11 16 11 35 6 2,6 2,6
65 2 1/2 46 136 145 84 12 4 6,5 50 65 36 F05 11 16 11 55 13 2,9 2,9
80 3 46 127 151 89 12 4 6,5 50 65 36 F05 11 16 11 73,5 20 3,6 3,6
100 4 52 149 175 106 10 4 6,5 50 65 36 F05 11 16 11 87 25 4,4 4,4
125 5 56 182 190 120 12 4 8,5 70 90 56 F07 14 19 14 118,5 37,5 6,2 6,3
150 6 56 209 203 131 12 4 8,5 70 90 56 F07 14 19 14 146,5 50,5 7,1 7,3
200 8 60 265 225 165 12 4 8,5 70 90 56 F07 14 19 14 190 70 11,2 11,2
250 10 68 316 266 196 14 4 10,5 102 125 71 F10 17 24 20 242 92 17,1
300 12 77 368 290 238 14 4 10,5 102 125 71 F10 22 29 16 292,5 112,5 23,8
350 14 77 421 305 270 16 4 12,5 125 150 87 F12 27 29 - 333 132,5 33,2
• 2 Centring lugs
(1) Stainless steel body (1.4408), stainless steel disc (1.4408), EPDM liner. - (2) Steel body (WCB), stainless steel disc (1.4408), EPDM liner.
Diameter Face
to face Overall dimensions ISO Top according to ISO 5211
Square drive
outlet
Travel
of the disc
Weight
kg
DN NPS E L1 H1 H2 H4 N øR øS øT øU N° o C H3 Plat P D1 D2 (1) (2)
32/40 1 1/2 32 106/99 130 56 12 4 6,5 50 65 36 F05 11 16 11 31 6,5 1,7 1,6
50 2 43 121/99 136 73 12 4 6,5 50 65 36 F05 11 16 11 35 6 2,6 2,1
65 2 1/2 46 136/117 145 82 12 4 6,5 50 65 36 F05 11 16 11 55 13 3,1 2,4
80 3 46 150/136 151 93 12 4 6,5 50 65 36 F05 11 16 11 73,5 20 3,2 2,8
100 4 52 166/167 175 106 12 4 8,5 70 90 56 F07 14 19 14 87 25 5,3 4,4
125 5 56
132/194 190 127 12 4 8,5 70 90 56 F07 14 19 14 118,5 37,5 6,6 5,7
150 6 56
139/225 203 147 12 4 8,5 70 90 56 F07 14 19 14 146,5 50,5 8,1 6,8
L2
• Tapped lugs and lugs with unthreaded holes*
*the version «lugs with unthreaded holes» replaces the double flange version
(1) Ductile iron body (JS1030), ductile iron disc (JS1030), EPDM liner - (2) Stainless steel body (1.4408), stainless steel disc (1.4408), EPDM liner.
Diameter Face
to face Overall dimensions ISO Top according to ISO 5211
Square drive
outlet
Travel
of the disc
Weight
kg
DN NPS E L2 H1 H2 H4 N øR øS øT øU N° o C H3 Plat P D1 D2 (1) (2)
32/40 1 1/2 32 146 130 57 12 4 6,5 50 65 36 F05 11 16 11 31 6,5 1,9 2,7
50 2 43 121 136 62 12 4 6,5 50 65 36 F05 11 16 11 35 6 3 3,3
65 2 1/2 46 135 145 70 12 4 6,5 50 65 36 F05 11 16 11 55 13 3,3 3,9
80 3 46 179 151 89 12 4 6,5 50 65 36 F05 11 16 11 73,5 20 4,2 4,8
100 4 52 206 175 103 10 4 6,5 50 65 36 F05 11 16 11 87 25 6
125 5 56 238 190 119 12 4 8,5 70 90 56 F07 14 19 14 118,5 37,5 6,2 9,7
150 6 56 265 203 133 12 4 8,5 70 90 56 F07 14 19 14 146,5 50,5 7,1 11,2
200 8 60
325(1)-
313(2)
225
163(1)-
157(2)
12 4 8,5 70 90 56 F07 14 19 14 190 70 15,7 14,3
250 10 68 397 266 198 14 4 10,5 102 125 71 F10 17 24 20 242 92 23
300 12 77 454 290 227 14 4 10,5 102 125 71 F10 22 29 16 292,5 112,5 34
350 14 77 497 305 248 16 4 12,5 125 150 87 F12 27 29 - 331 132 46
• Double flanges
Diameter Face
to face Overall dimensions ISO Top according to ISO 5211
Square drive
outlet
Travel
of the disc
Weight
kg
DN NPS E L3 H1 H2 H4 N øR øS øT øU N° o C H3 Plat P D1 D2 (1) (2)
250 10 68 406 266 201 14 4 10,5 102 125 71 F10 17 24 20 242 92 27
300 12 77 483 290 242 14 4 10,5 102 125 71 F10 22 29 16 292,5 112,5 43
350 14 77 534 305 256 16 4 12,5 125 150 87 F12 27 29 - 331 132 56
L3

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 5
Connecting kit
for actuations
H1
H3
H2
N trous ØR sur ØS
DN NPS Iso top of
the valve
Iso top of the actuation
F03 F04 F05 F07 F10 F12 F14 F16
H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2
32 1 1/4
F05/o11
190
60
190
60
190
60
190
60
210
80
40 1 1/2 190 190 190 190 210
50 2 199 199 199 199 219
65 2 1/2 205
205 205 205 225
80 3 210 210 210 210 230
100 4 235
235 235 235 255
125 5
F07/o14
249 249
60
249
60
269
150 6 262 262 262 282
200 8 285 285 285 305
250 10 F10/o17
346
80 346 80
346
80
346 80 356
90
356
90
300 12 F10/o22 370 370 370 370 380 380
350 14 F12/o27 395 90 395 90 395 395
DN NPS Iso top of
the valve
Exceeding length fo the shaft H3
Kit o9o11 o14 o17 o22 o27 o36 o46
32 1 1/4
F05/o11
F03
F04
F05
F07
F10
7 9 12 15 20 25
40 1 1/2
50 2
65 2 1/2
80 3
100 4
125 5
F07/o14
F04
F05
F07
F10
F12
F14
9 12 15 20 25 34
150 6
200 8 F07/o14
F04
F05
F07
F10
F12
F14
9 12 15 20 25 34
250 10 F10/o17
F05
F07
F10
F12
F14
9 12 15 20 25 34
300 12 F10/o22
F05
F07
F10
F12
F14
12 15 20 25 34
350 14 F12/o27
F07
F10
F12
F14
F16
15 20 25 34 48
N° N øR øS
F03 4 5,5 36
F04 4 5,5 42
F05 4 6,5 50
F07 4 8,5 70
F10 4 10,5 102
F12 4 12,5 125
F14 4 17 140
F16 4 22 165
We recommend direct mounting of the actuation, otherwise see table below.
Reminder of the iso top dimensions EN
ISO 5211 (see also the overall dimen-
sions).
Other special executions on request :
actuated by par square drive and flat
according to EN ISO 5211, subjected
to technical feasibility.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/20166
(1) Pneumatic actuator only
Actuations
HAND LEVER PNEUMATIC
ACTUATOR
ELECTRIC
ACTUATOR
• 1 or 2 mechanical limit switch
For other options, please
consult us.
• Switchbox :
. mechanical
. inductive
. inductive + solenoid valve
. mechanical + solenoid valve
• Inductive limit switch
• Positioners (1)
. BURKERT 1067
• Remote control +
emergency hand
wheel
• Auma • Bernard
• Socla
• Belimo
• Rotork
• Notched hand
lever polyamide
(PCX)
GEAR BOX
• Manual gearbox in
cast iron
• Adjustable ductile iron
hand lever (PRF)
• Notched ductile iron hand
lever (PCF)
ASSEMBLY LEVEL 1 ASSEMBLY LEVEL 2
• Socla
Find below the different standard assembly combinations.
For any other information, please ask our technical Department.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 7
Connecting flanges The Sylax 25-350 mm butterfly valve can be mounted with the following connections
(other types on request) :
• 4 Centering lugs
(1) Cast iron body GJL-250 (JL1040) only.
(2) Cast iron body GJL-250 (JL1040) only;
re-machining for ductile iron body GJS
400-15 (JS1030)
o
4: possible mounting
l: possible mounting with re-machining
: possible mounting but special reference
: impossible mounting
Diameter EN1092-1 & EN1092-2
ASME/ANSI
B16.1
Class 125
ASME/ANSI
B16.5
Class 150
ASME/ANSI
B16.5
Class 300
BS10 JIS B2238 et JIS B2239
DN NPS PN6 PN10 PN16 PN25 PN40 Table D Table E 5K 10k 16k
25 1 4(1) 4(1) 4(1) 4(1) 4(1) 4(1) 4(1) 4(1) 4(1) 4(1)
l 4 l
32 1 1/4
4 4 4 4 4
4(2) 4(2)
4 l l l 4 l
40 1 1/2
4 4 4 4 4 4 4 l 4 4 l 4 l
50 2
4 4 4 4 4 4 4 l 4 4 l l l
65 2 1/2
4 4 4 4 4 4 4 l l l 4 4 l
80 3
4 4 4 4 4 4 4 l 4 4 4 l l
100 4
4 4 4 4 4 4 4 l 4 4 l l 4
125 5
4 4 4 l l 4 4 l 4 4 4 4 l
150 6
4 4 4 l l 4 4 l 4 4 4 4 l
200 8
4 4 4 l l 4 4 l 4 4 l l l
250 10
4 4 4 l l 4 4 l 4 4 4 l
300 12
4 4 4 4 l 4 4 l 4 4 4 4 4
350 14
4 4 4 4 l 4 4 4 4 l l 4
• 2 Centering lugs (3)
Diameter EN1092-1 & EN1092-2
ASME/ANSI
B16.1
Class 125
ASME/ANSI
B16.5
Class 150
ASME/ANSI
B16.5
Class 300
BS10 JIS B2238 et JIS B2239
DN NPS PN6 PN10 PN16 PN25 PN40 Table D Table E 5K 10k 16k
32 1 1/4
4 4 4 4 4 4 4 o4 4 4 4 4
40 1 1/2
4 4 4 4 4 4 4 o4 4 4 4 4
50 2
o4 4 4 4 4 o o o o o o o
65 2 1/2
o4 4 o o 4 4 o4o o 4o
80 3
o4 4 4 4 4 o o o o o o o
100 4
o4 4 o o 4 4 o o o o o o
125 5
o4 4 o o 4 4 o o o o o o
150 6
o4 4 o o 4 4 o4o o o o
(3) Body in stainless steel (1.4408) and
in steel (WCB)
• Tapped lugs
DN65 PN10/16 4 holes
(4) Possible mounting for ductile iron body GJS 400-15
(JS1030) , impossible mounting for body in cast iron
GJL-250 (JL1040) and in stainless steel.
(5) Possible mounting if the butterfly valve is inclined
at 22,5° Attention : the Sylax 25-350 mm lug type body is not a multi-connection body (connection to many flanges of different sizes). Generally, every connection relates to a different reference
of finished products.
Diameter EN1092-1 & EN1092-2
ASME/ANSI
B16.1
Class 125
ASME/ANSI
B16.5
Class 150
ASME/ANSI
B16.5
Class 300
BS10 JIS B2238 et JIS B2239
DN NPS PN6 PN10 PN16 PN25 PN40 Table D Table E 5K 10k 16k
32 1 1/4
o4 4 4 4 o o o o o o o o
40 1 1/2
o4 4 4 4 o o o o o o o o
50 2
o4 4 4 4 o o o o o o(4)
65
2 1/2
o4 4 o o o o o o o o o
80 3
o4 4 4 4 o o o o o o o
100 4
o(5) 4 4 o o o o o(5) o o o o
125 5
4 4 4 4 4 4 4 4 4 4 4 4 4
150 6
4 4 4 4 4 4 4 4 4 4 4 4 4
200 8
4 4 4 o o o o o o(1)
250
10
o4 4 о о о о о о
300 12
о4 4 о о о о о
350 14
4 4 о
• Double flanges
Diameter EN1092-1 & EN1092-2
ASME/ANSI
B16.1
Class 125
ASME/ANSI
B16.5
Class 150
ASME/ANSI
B16.5
Class 300
BS10 JIS B2238 et JIS B2239
DN NPS PN6 PN10 PN16 PN25 PN40 Table D Table E 5K 10k 16k
250 10
о4 4 о о о о о о
300 12
о4 4 о о о о о о о о
350 14
о4 4 о о о о о о о

Technical manual Sylax DN 25-350 mm
Connecting flanges • End of line mounting and downstream removing
The end of line mounting and the downstream removing, at ambient temperature, of the Sylax 25-350 mm butterfly valve is
limited to the pressure mentioned on page 11 according to the PED directive 2014/68/UE.
These mountings are only possible on tapped lugs and lugs with unthreaded holes.
Downstream
removing
End of line
mounting
For wafer type bodies with 4 centering lugs, the end of line mounting can be done
in the following conditions :
- ambient temperature
- For water or non dangerous liquids (L2)
- For butterfly valves PFA 16 bar between flanges
- For butterfly valves with ductile iron body
- For butterfly valves with liners in EPDM or high content nitrile
- Within a short period (such as maintenance, ...), 15 days maximum
- In pressure conditions (PFA or PS) such as : see table
Use nuts with reduced face-to-face dimensions between the flange to be dismounted and the centering lugs.
Use washers, wide ones if needed, in order to mount the nuts on the lugs.
The mounting and the removing must be done successively and in opposite way on each nut.
For the mounting, apply a reasonable torque on the nuts, in order not to damage the lugs, until metal-metal contact between
flange and body.
For flanges with 8 rods, only 4 are used to maintain the valve in downstream removing ; the 8 rods must be re-mounted for a
normal use between flanges .
In case of unexpected downstream removing, integrate and screw successively and in opposite way, between the lugs and the
flange to be removed, the 4 nuts which hold the butterfly valve.
Downstream
removing
Mounting
between flanges
8uksylax25_350 - Updated 20/09/2016
DN PFA or PS
(bar)
32 to 150 10
200 to 300 8

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 9
Normalisation
A mounting instruction specifying the installation characteristics and the commission of the Sylax is available on our web site
www.socla.com or on request by our sales department.
• Iso top connection for actuations :
According to EN ISO 5211
• Face to face :
According to 558-1 series 20
ISO 5752 series 20
API 609 table 2
• Connecting flanges : see on page 8
According to EN1092-1 and EN1092-2
ASME/ANSI B16.5
BS10-d and BS10-e
JIS B2238 and JIS B2239
• Tests :
According to EN12266-1
Resistance and tightness of the body : test P11(1,5 x allowable operating pressure)
Tightness of the seat : test P12 rate A (1,1 x allowable operating pressure )
According to EN12266-2
Anti-static design : test F21
• European Directives :
Our butterfly valves are in accordance to the safety requirements of the following directives. :
Directive 2014/68/UE : Equipments under pressure PED
(Pressure Equipment Directive)
Applies to the design, manufacturing and the assessment of the conformity of pressure equipment, the maximum allowable pressure of
which is 0.5 bar.
Pressure equipment for water supply, distribution, and disposal of water is excluded.
Depending on the type of pressure equipment, maximum allowable temperature (PS), DN, physical nature of the fluid (liquid, gas
or vapour) and the degree of danger of the fluid (group1/2)*, the directive classifies this same equipment into different categories
(article 3.3, I, II, III, IV), required for the assessment of conformity with CE marking.
The equipment defined in article 3.3 of the directive must not bear the CE marking.
(*) Group 1 : hazardous fluids (directive 67/548/EEC) / explosive / highly flammable /easily flammable / flammable / very toxic / toxic /
combustion agents.
Group 2 : all other fluids
Important notice : the indicated pressure for the different categories of fluids (L1/L2/G1/G2) is under no condition a guarantee of use.
Therefore, it is essential to validate the use of products under given operating conditions. Socla is not responsible for alteration of the pro-
ducts to working conditions not previously specified by the customer.
In order to facilitate your choice regarding these new regulatory requirements, Socla has put the necessary information
concerning products with CE marking, specification sheets and product identification plates at your disposal in the price list (+ see additional
explanations on the detachable slip).
In addition, the operating instructions are available on our web site www.socla.com or by simple request from our sales department.
Machinery Directive 2006/42/CE : Machinery Directive
In its Appendix I it sets a certain number of Essential Health and Safety Requirements which must be met. It applies to motorised butterfly
valves, (with electric, pneumatic or hydraulic actuators). According to this Directive, these sets are “Partly Completed Machineries” designed
for being integrated into a machine.
“Partly Completed Machinery” means an assembly which is almost machinery but which cannot in itself perform a specific application. A drive
system is partly completed machinery. Partly completed machinery is only intended to be incorporated into or assembled with other machi-
nery or other partly completed machinery or equipment, thereby forming machinery to which this Directive applies.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/201610
Pressure
DIRECTIVE 2014/68/UE Equipments under pressure.
Products manufactured in conformity with the requirements of the directive, according to pressure, DN
and fluid (see on the precedent page )
.
PS : Maximum allowable pressure (in bar) according to Directive 2014/68/UE
PFA : Allowable operating pressure (in bar) for supply, distribution and disposal of water.
LINERS DN mm Cat.MOUNTING PFA PS
L1 L2 G1 G2
6 bar
EPDM, Nitrile (CC333G disc), White
EPDM
32 to 150
3.3
Flanges 6 6 6 6
End of line 4 4 4 4
200 to 350
I
Flanges 6 6 6 6
End of line 4 4 4 4
Nitrile (except CC333G disc),
Neoprene, Butyl, Hypalon, Natural
rubber, White natural rubber.
32 to 100
I
Flanges 6 6 6 6 6
End of line 4 4 4 4
125 to 350
II
Flanges 6 6 6 6 6
End of line 4 4 4 4
10 bar
EPDM, Nitrile (CC333G disc), White
Nitrile, Carboxylated Nitrile , White
EPDM
25 to 100
3,3
Flanges 10 10 10 10
End of line 6 6 6 6
125 & 150
I
Flanges 10 10 10 10
End of line 6 6 6 6
200 to 350
I
Flanges 10 10 10 10
End of line 6 6 6 6
Nitrile (except CC333G disc),
FKM
25
3,3
Flanges 10 10 10 10 10
End of line 6 6 6 6
32 to 100
I
Flanges 10 10 10 10 10
End of line 6 6 6 6
125 to 350
II
Flanges 10 10 10 10 10
End of line 6 6 6 6
Silicone
32 to 100
I
Flanges 10 10 10 10 10
End of line 6 6 6 6
125 to 150
II
Flanges 10 10 10 10 10
End of line 6 6 6 6
200 to 350
II
Flanges 6 6 6 6 6
End of line 4 4 4 4
16 bar
EPDM, Nitrile (CC333G disc)
32 to 100
3,3
Flanges 16 16 16 10
End of line 12 12 12 10
125
I
Flanges 16 16 16 10
End of line 12 12 12 10
150
I
Flanges 16 10 16 10
End of line 12 6 12 10
200 to 300
I
Flanges 16 10 16 10
End of line 10 6 10 10
350
I
Flanges 16 10 16 10
End of line 8 6 8 8
Nitrile (except CC333G disc),
Neoprene, Butyl, Hypalon, Natural
rubber, White natural rubber
32 to 100
I
Flanges 16 16 16 10 16
End of line 12 12 12 12
125 & 150
II
Flanges 16 16 16 10 16
End of line 12 12 12 12
200 to 300
II
Flanges 16 16 16 10 10
End of line 10 10 10 10
350
II
Flanges 16 16 16 10 10
End of line 8 8 8 8
20 bar
EPDM, Nitrile (CC333G disc)
32 to 250
3,3
Flanges 20 20
End of line 12 12
300 & 350
I
Flanges 20 20
End of line 12 12
Nitrile (except CC333G disc), Neo-
prene, Butyl, Natural rubber, White
natural rubber
32 to 100
3,3
Flanges 20 20 20
End of line 12 12 12
125 to 350
II
Flanges 20 20 20
End of line 12 12 12
25 bar
EPDM, Nitrile (CC333G disc) 32 to 150
3,3
Flanges 25 25
End of line 16 16
Nitrile (except CC333G disc)
32 to 80
3,3
Flanges 25 25 25
End of line 16 16 16
100 to 150
II
Flanges 25 25 25
End of line 16 16 16
ATTENTION
Gas G1 and G2 : The max.
pressure is 6 bar when
using cast iron 5.1301(EN-
GJL-250).
NOTE : Butterfly valves of
category II used as «end
of line», please consult us.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 11
Torque values
NOTE :
One actuation minimum per month.
Pressure/temperature
diagram
EPDM liner DN 25 up to 350
Pressure in bar
Temperature in °C
For every other elastomer, please ask our sales department.
Wet torques
(Nm)
25 32 40 50 65 80 100 125 150 200 250 300 350
PS6
EPDM
10 10 10 10 10 20 22 40 45 85 200 280 400
NBR
10 12 12 12 20 22 30 55 85 115 255 380 560
PS16
EPDM
10 10 10 10 18 25 46 50 60 120 280 430 500
NBR
10 12 12 12 28 32 55 80 100 150 450 600 720

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/201612
Flow rate (Kv)
The butterfly valve is not the best product for regula-
ting Nevertheless, the Sylax 25-350 mm butterfly valve
can be used to regulate by an opening stage between
30° and 90°.
A regulation in the opening stage lower than 30° is
not advisable because of over speed, cavitation effect,
which could damage prematurely the valve.
Kv = volume of water in m3/h through a valve at a preset
opening stage and under a head loss of 1 bar.
The maximum flow velocity of the fluid through the valve must not exceed :
- 3 m/s for liquid fluids. Between 3 and 5m/s, the use of the Sylax 25-350 mm butterfly valve is possible, but the phenomena
of cavitation, noise, vibration and water hammering increase.
- 20m/s for gas. Between 20 and 25m/s, the use of the Sylax 25-350 mm butterfly valve is possible, but the phenomena of
cavitation, noise, vibration and water hammering increase.
- for pulverulent or paste fluids : please consult us.
OPENING STAGES
OPENING STAGE - Stainless steel disc
DN 10° 20° 30° 40° 50° 60° 70° 80° 90°
25 - - - 3 8 16 27 35 40
32/40 - - - 5 12 25 40 56 62
50 - - 1 8 18 33 54 71 79
65 - - 6 19 41 76 118 158 174
80 - 3 18 43 79 138 211 252 275
100
- 15 38 83 154 253 368 458 496
125
- 20 61 134 249 399 599 792 883
150
5 37 100 200 374 600 863 1109 1212
200
15 76 200 399 680 1099 1666 2196 2500
250
40 150 333 621 1084 1765 2452 3517 3948
300
60 219 500 989 1736 2770 4097 5118 5635
350
145 420 882 1676 2850 4462 6000 7431 8520
DEGRES D'OUVERTURE
DN
0ϒ10ϒ30ϒ20ϒ60ϒ70ϒ50ϒ40ϒ90ϒ80ϒ
Kv
8
6
5
4
3
2.5
2
1.5
10
1
100
15
20
25
30
40
50
60
80
800
600
500
400
300
250
200
150
1000
10000
1500
2000
2500
3000
4000
5000
6000
8000
8000
6000
5000
4000
3000
2500
2000
1500
10000
1000
150
200
250
300
400
500
600
800
80
60
50
40
30
25
20
15
100
10
4
5
6
8
1500
2000
2500
3000
4000
GALLON/MIN M3/H
125
200
250
300
65
50
100
80
150
350
32/40
25

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 13
Headloss diagram (Δp)
FLOW
DEBIT
M3/H
FLOW
GALLON/MIN
PSI
M/CE
100
DN
134510 15
10
2345
20
30
40
60
80
1
.7.2 .3 .4 .5
678
6 7 8
1.5
2
.6 .8
.15
P
10
1000
150
200
250
300
400
500
600
800
10000
2000
3000
4000
6000
100
80
60
40
150
200
300
400
1000
1500
2000
3000
4000
6000
10000
20000
30000
40000
25000
15000
8000
600
800
5000
2500
8000
5000
2500
1500
M/WC
25
32-40
50
65
80
100
125
150
200
250
300
350

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/201614
Type of flange The Sylax 25-350 mm butterfly valve has
been designed to be mounted on nor-
malised standard flanges. Only standard
flanges type 11, 21 and 34 according to EN
1092 are quite compatible.
For other types of flanges, refer to the table
below.
Non appropriate connections will cancel our
guarantee.
NOTE : The use of expansion seals, as well as the use of elastomer coated flanges, between the flange and the valve are
strictly forbidden.
ØA1
ØB
ØA0
ØA2
Tag / traceability
Rep Description
1 Name of the valve
2 Reference
3 Material of the disc
4 Material of the liner
5 Pressure PS between flanges L1/L2 (liquid)
6 Pressure PS between flanges G1/G2 (gas)
7 Pressure PS end flange L1/L2 (liquid)
8 Pressure PFA water 20°C
9 Pressure PS end flange G2 (gas)
10 Number of manufacturing order
11 Notified Body Number for the Directive PED 2014/68/UE
12 Manufacturing date
13 Connecting flanges
14 Limit of use
15 Approval information zone
2
4
6
9
12
10
11
13
14
7
5
3
1
15
8
DN Ø A0 Ø A1 mini Ø A2 maxi Ø B mini
25 1 32 - 44 60
32 1 1/4 43 35 51 80
40 1 1/2 43 35 51 80
50 2 54 42 60 90
65 2 1/2 70 62 74 110
80 3 85 82 91 128
100 4 100 97 108 148
125 5 125 128 143 178
150 6 150 156 166 202
200 8 200 200 224 258
250 10 250 252 280 313
300 12 300 303 329 365
350 14 340 344 369 418

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 15
Bolts and nuts
DN NPS a e
EN 1092
PN6
EN 1092
PN10
EN 1092
PN16
EN 1092
PN25
ASME / ANSI B16.5
Class 150
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV
Metric
ØV
UNC**
c
25 1 32 -- 4 M10 16 4 M12 18 4 M12 18 4 M12 18 4 M14 1/2’’ 18
32/40 11/2 32 14 4 M12 18 4 M16 24 4 M16 24 4 M16 24 4 M14 1/2’’ 18
50 2 43 18 4 M12 18 4 M16 24 4 M16 24 4 M16 24 4 M16 5/8’’ 24
65* 21/2 46 20 4 M12 18 8* M16 24 8* M16 24 8 M16 24 4 M16 5/8’’ 24
80 3 46 20 4 M16 24 8 M16 24 8 M16 24 8 M16 24 4 M16 5/8’’ 24
100 4 52 24 4 M16 24 8 M16 24 8 M16 24 8 M20 26 8 M16 5/8’’ 24
125 5 56 26 8 M16 24 8 M16 24 8 M16 24 8 M24 32 8 M20 3/4’’ 26
150 6 56 26 8 M16 24 8 M20 26 8 M20 26 8 M24 32 8 M20 3/4’’ 26
200 8 60 28 8 M16 24 8 M20 26 12 M20 26 12 M24 32 8 M20 3/4’’ 26
250 10 68 32 12 M16 24 12 M20 26 12 M24 32 12 M27 32 12 M24 7/8’’ 26
300 12 77 36 12 M20 26 12 M20 26 12 M24 32 16 M27 32 12 M24 7/8’’ 26
350 14 77 36 12 M20 26 16 M20 26 16 M24 32 16 M30 36 12 M27 1’’ 32
DN NPS a e
BS10-d BS10-e
JIS2238 & JIS2239
5K
JIS2238 & JIS2239
10K
JIS2238 & JIS2239
16K
* Nb
rods
or Nb
screw
ØV
UNC c
* Nb
rods
or Nb
screw
ØV
UNC c
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV c
* Nb
rods
or Nb
screw
ØV c
25 1 32 -- 4 1/2’’ 18 4 1/2’’ 18 4 M10 16 4 M16 24 4 M16 24
32/40 11/2 32 14 4 1/2’’ 18 4 1/2’’ 18 4 M12 18 4 M16 24 4 M16 24
50 2 43 18 4 5/8’’ 24 4 5/8’’ 24 4 M12 18 4 M16 24 8 M16 24
65 21/2 46 20 4 5/8’’ 24 4 5/8’’ 24 4 M12 18 4 M16 24 8 M16 24
80 3 46 20 4 5/8’’ 24 4 5/8’’ 24 4 M16 24 8 M16 24 8 M20 26
100 4 52 24 4 5/8’’ 24 8 5/8’’ 24 8 M16 24 8 M16 24 8 M20 26
125 5 56 26 8 5/8’’ 24 8 5/8’’ 24 8 M16 24 8 M20 26 8 M22 26
150 6 56 26 8 5/8’’ 24 8 3/4’’ 26 8 M16 24 8 M20 26 12 M22 26
200 8 60 28 8 5/8’’ 24 8 3/4’’ 26 8 M20 26 12 M20 26 12 M22 26
250 10 68 32 8 3/4’’ 26 12 3/4’’ 26 12 M20 26 12 M22 26 12 M24 32
300 12 77 36 12 3/4’’ 26 12 7/8’’ 26 12 M20 26 16 M22 26 16 M24 32
350 14 77 36 12 7/8’’ 26 12 7/8’’ 26 12 M22 26 16 M22 26 16
M30 x 3 36
* WAFER TYPE BODY AND LUGS WITH UNTHREADED HOLES :
Assembly by rods : number of nuts and washer = 2 x Number of rods (above)
Assembly by bolts : Number of nuts = Number of screws (above) and number of washer = 2 x Number of nuts
* LUG TYPE BODY :
Assembly by screws : Number of screw per face (above) and number of washer is the same
* DOUBLE FLANGE BODY :
Assembly by rods : number of nuts and washers= 2 x Number of rods (above)
Assembly by rods + central nut : Number of nuts = 2 x Number of rods (above)
Number of washers = 4 x Number of rods (above)
Number of thin nuts for central position = 1 x Number of rods (above)
** ASME / ANSI B16.5 Class 150 : Standard version : metric threading; UNC threading : please consult us.
* For flanges in cast or ductile iron 4 holes M16 and for flanges in steel 8 holes M16 on the same drilling circle.
Note : Bolts and nuts are not part of our standard supply

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/201616
Version lug type with unthreaded holes, (permanent
downstream dismantling) assembly by bolts :
L3 = a/2 + b + c + j
L3 = minimum length under head of screw
a = width of the butterfly valve
(face to face dimension)
b = thickness of the flange (customer)
c =
thickness of washer + thickness of nut + exceeding length of the rod
j = thickness of washer under head of screw
Mounting in case of downstream pipework dismantling (see page 8).
Use nuts with reduced face-to-face dimensions between the butterfly
valve and the downstream flange.
Bolts and nuts
c b a b c
L1
ØV
L2
jb a b c
ØV
L1
c b a b c
L2
b a b c
j
L3
jbac
Mounting in case of downstream pipework dismantling (see page 8).
Use nuts with reduced face-to-face dimensions between the butterfly
valve and the downstream flange.
For wafer type and lugs with unthreaded holes ; assembly by rods :
L1 = a + 2(b+c)
L1 = minimum length of rods
a = width of the butterfly valve (face to face dimension)
b = thickness of the flange (customer)
c = thickness of washer + thickness of nut + exceeding length of the rod.
For wafer type and lugs with unthreaded holes ; assembly by
bolts :
L2 = a + 2b + c + j
L2 = minimum length under head of screw
a = width of the butterfly valve
b = thickness of the flange (customer)
c = thickness of washer + thickness of nut + exceeding length of the rod
j = thickness of washer at the head of the screw.

Technical manual Sylax DN 25-350 mm
uksylax25_350 - Updated 20/09/2016 17
Installation • General remarks :
For safety reasons, the installation must take place
under the supervision of authorised people taking
account of local safety instructions and advice.
The handling of butterfly valves and their controls
must be done by staff trained in all technical
aspects of their operation.
Before installation the pipes must be depressu-
rised and purged (empty of its fluid) in order to
avoid any danger to the operator.
The pipe work must be correctly aligned so that
no extra stress is exerted on the valve casing.
Check the compatibility of the connection flanges
against the operating pressure : the PN number of
the flanges must be greater or equal to the ope-
rating pressure.
The valve is a machined piece of equipment and
must not be used to prise apart the flanges.
A mounting instruction specifying the installation
characteristics and the commission of the Sylax
25-350 mm is available on our web site www.
socla.com or on request by our sales department.
• Installation conditions :
It is recommended that the distances mentioned
below be respected in order to prolong the life
time of the valve.
Mounting the valve close to pipe work junctions
places it in turbulent zones which increase its
wear.
5-6 DN
1 DN
DN
2-3 DN
DN
1 DN
DN
2-3 DN
1 DN
DN
2-3 DN
DN
1 DN
DN
Socla
sas
365 rue du lieutenant Putier
71530 VIREY LE GRAND
Postal address : CS 10273
71107 CHALON SUR SAONE Cedex
Tel : [phone]
Fax : [phone]
http://www.socla.com
e-mail : [email protected]
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