Safety Butterfly Valve Eurostop

Version for manual resetting pump

Version for electric resetting pump

Safety Butterfly Valve Eurostop

PRODUCT FAMILY
PIPELINE PROTECTION
PIPELINE PROTECTION
RANGE / MARK ®
Butterfly Valves Security
Main features

The safety butterfly valves are used on hydroelectric plants, aqueducts and waterworks to:

  • limit the damages on turbine plant caused by water excess velocity in the pipelines due to any reason;
  • shut off the pipelines on pumping plants or penstocks, in case of failure of electric power, to avoid backflow towards the pump.

Range

The standard version is composed by a butterfly valve with bare shaft and an oleo-dynamic actuator that includes the counterweight and the oleo-dynamic cylinder.

Moreover are available other configuration:

  • butterfly with bare shaft with oleo-dynamic actuator and paddle over speed detector with manual resetting pump;
  • butterfly with bare shaft with oleo-dynamic actuator and electric resetting unit;
  • butterfly with bare shaft with oleo-dynamic actuator and paddle over speed detector and electric resetting unit.

References of Standard version:

Material and coatings

Butterfly with bare shaft

Item

Description

Material

Coating

1

Body

Ductile iron GS500-7

Epoxy powder minimum thickness 250 micron

2

Disc

Ductile iron GS500-7

Epoxy powder minimum thickness 250 micron

3

Retaining ring

Carbon Steel S235JR

-

4

Rear cover

Carbon Steel S235JR

-

5

Rear shaft

Stainless steel AISI 420B

-

6

Drive shaft

Stainless steel AISI 420B

-

7

Lock nut

Bronze 85.5.5.5

-

8

Ring

Bronze 85.5.5.5

-

9

Ring

Bronze 85.5.5.5

-

10

Seat ring

Stainless steel AISI 316L

-

11

Pin

Stainless steel AISI 630

-

12

Bearing

Bronze GCuSn12

-

13-19

Screws**

Stainless steel A2

-

20

Plug*

Brass P-ØST8

-

21

Feather key

Steel C40

-

22

Gasket

EPDM

-

23

Sealing element

PTFE

-

24-26

O-ring

EPDM

-

(*) Insert before doing the coating (**) Screws over M18 in steel cl 8.8 Galvanized

Oleo-dynamic Actuator

The oleo-dynamic actuators are protected with epoxy powder.

On the oleo-dynamic actuator are present two limit switchers for the opening/closing position.

Dimensions and mass - Standard Version

Can be supplied also without counterweight, using the oleo-dynamic cylinder with double effect.

Weight and overall dimension can be changed in a presence of specific installation demand.

Standard Version PN10

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1506534116963521522852101116679481200237
2006534116963821813402301416679781200250
25065341169644121640025020066710371200273
30065341169646524045527022466710611300293
35075746778354425950529020877710791300429
40075746778359533056531025977711301300463
450991604798657354615330316102012011300651
500991604798682379670350341102012261300679
60012727881022722433780390446130413431400948
700127278810228135048954305371304143414001103
8001520939105992659610154705851560152614001721
9001520939105997564211155106341560157515001917
1000176810901229115171212305507101815170015003037
1200176810901229116285014556307211815171116003478
1400198212081413135996216757107682040185216005092
15001982120814131410101317857508192040190317005453
16001982120814131462106519157908712040195517006050
18002196132610791796125021158709152265219918009374
2000219613261079189113452325950111022652294180010779

Standard Version PN16

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1505623684153021522852101425709291200171
2005623684153321813402301725709591200184
25065341144644121640025020066710371200273
30075746753352524045527018977710601300407
35075746753356429952029022877710991300449
400991604548637334580310296102011811300643
450991604548657354640330316102012011300679
500991604548682379715350341102012261300729
60012727887727694608403904931304139014001073
70015209398098785459104305371560147814001616
80017681090979104961010254706081815159514002657
90017681090979110066111255106591815164915002828
100017681090979106975612555506281815161815003187
1200198212081163125886114856306672040175116004937
14002196132614591590104416857107092265199316006583
15002196132614591641109518207507602265204417007274
16002196132614591694114819307908132265209717007909
180025771610171418911301213087098026392289180014615
2000257716101714198613962345950107526392384180015994

Standard Version PN25

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1505623684153091583002101495709361200128
20065341144641819336023017766710141200218
25075746753350121642525016577710361200353
30075746753354528048527020977710801300393
350991604548606303555290265102011501300583
400991604548637334620310296102011811300632
4501272788772690381670330414130413111300895
5001272788772717405730350441130413381300942
60015209398098324998453904911560143214001535
7001768109097910015629604305601815155014002570
8001768109097996765410854705261815151614002849
900198212081163111170411855105202040160415004207
1000198212081163116476713205505732040165715004651
1200219613261459148994315306306082265189216007751
14002196132614591591104517557107102265199416008960
150025771610171417361146186575082526392134170013637

Dimensions and mass - Version with paddle over speed detector and manual resetting pump

The length “L” is the minimum advised

Version with paddle over speed detector and manual resetting pump PN10

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1506534116963521522852101116679481200237
2006534116963821813402301416679781200250
25065341169644121640025020066710371200273
30065341169646524045527022466710611300293
35075746778354425950529020877710791300429
40075746778359533056531025977711301300463
450991604798657354615330316102012011300651
500991604798682379670350341102012261300679
60012727881022722433780390446130413431400948
700127278810228135048954305371304143414001103
8001520939105992659610154705851560152614001721
9001520939105997564211155106341560157515001917
1000176810901229115171212305507101815170015003037
1200176810901229116285014556307211815171116003478
1400198212081413135996216757107682040185216005092
15001982120814131410101317857508192040190317005453
16001982120814131462106519157908712040195517006050
18002196132610791796125021158709152265219918009374
2000219613261079189113452325950111022652294180010779

Version with paddle over speed detector and manual resetting pump PN16

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1505623684153021522852101425709291200171
2005623684153321813402301725709591200184
25065341144644121640025020066710371200273
30075746753352524045527018977710601300407
35075746753356429952029022877710991300449
400991604548637334580310296102011811300643
450991604548657354640330316102012011300679
500991604548682379715350341102012261300729
60012727887727694608403904931304139014001073
70015209398098785459104305371560147814001616
80017681090979104961010254706081815159514002657
90017681090979110066111255106591815164915002828
100017681090979106975612555506281815161815003187
1200198212081163125886114856306672040175116004937
14002196132614591590104416857107092265199316006583
15002196132614591641109518207507602265204417007274
16002196132614591694114819307908132265209717007909
180025771610171418911301213087098026392289180014615
2000257716101714198613962345950107526392384180015994

Version with paddle over speed detector and manual resetting pump PN25

DNABKDEFGHRILMass
mmmmmmmmmmmmmmmmmmmmmmmmkg
1505623684153091583002101495709361200175
20065341144641819336023017766710141200265
25075746753350121642525016577710361200400
30075746753354528048527020977710801300440
350991604548606303555290265102011501300630
400991604548637334620310296102011811300679
4501272788772690381670330414130413111300944
5001272788772717405730350441130413381300991
60015209398098324998453904911560143214001584
7001768109097910015629604305601815155014002620
8001768109097996765410854705261815151614002899
900198212081163111170411855105202040160415004257
1000219612081163116476713205505732040165715004701
1200219613261459148994315306306082265189216006391
14002196132614591591104517557107102265199416007600
150025771610171417361146186575082526392134170013693

Dimensions and mass - Version with paddle over speed detector and electric resetting unit

The length “L” is the minimum advised.

The electric resetting unit is not shown because can be placed by the customer on his requirements.

Version with paddle over speed detector and electric resetting unit PN10

DNABKDEFGHRLMass
mmmmmmmmmmmmmmmmmmmmmmkg
1506534116963521522852101116671200237
2006534116963821813402301416671200250
2506534116964412164002502006671200273
3006534116964652404552702246671300293
3507574677835442595052902087771300429
4007574677835953305653102597771300463
45099160479865735461533031610201300651
50099160479868237967035034110201300679
6001272788102272243378039044613041400948
70012727881022813504895430537130414001103
800152093910599265961015470585156014001721
900152093910599756421115510634156015001917
100017681090122911517121230550710181515003037
120017681090122911628501455630721181516003478
140019821208141313599621675710768204016005092
1500198212081413141010131785750819204017005453
1600198212081413146210651915790871204017006050
1800219613261079179612502115870915226518009374
200021961326107918911345232595011102265180010779

Version with paddle over speed detector and electric resetting unit PN16

DNABKDEFGHRLMass
mmmmmmmmmmmmmmmmmmmmmmkg
1505623684153521522852101115701200170
2005623684153821813402301415701200184
2506534114464412164002502006671200273
3007574675335252404552701897771300407
3507574675335642995202902287771300449
40099160454863733458031029610201300643
45099160454865735464033031610201300679
50099160454868237971535034110201300729
6001272788772769460840390493130414001073
7001520939809878545910430537156014001616
8001768109097910496101025470608181514002657
9001768109097911006611125510659181515002828
10001768109097910697561255550628181515003187
120019821208116312588611485630667204016004937
1400219613261459159010441685710709226516006583
1500219613261459164110951820750760226517007274
1600219613261459169411481930790813226517007909
18002577161017141891130121308709802639180014615
200025771610171419861396234595010752639180015994

Version with paddle over speed detector and electric resetting unit PN25

DNABKDEFGHRLMass
mmmmmmmmmmmmmmmmmmmmmmkg
1505623684153091583002101495701200175
2006534114464181933602301776671200265
2507574675335012164252501657771200400
3007574675335452804852702097771300440
35099160454860630355529026510201300630
40099160454863733462031029610201300679
450127278877269038167033041413041300944
500127278877271740573035044113041300991
6001520939809832499845390491156014001584
700176810909791001562960430560181514002620
800176810909799676541085470526181514002899
90019821208116311117041185510520204015004257
100021961208116311647671320550573204015004701
120021961326145914899431530630608226516006391
1400219613261459159110451755710710226516007600
15002577161017141736114618657508252639170013693

Dimensions and mass - Version with electric resetting unit

For overall dimension see par 2.2.1.

The electric resetting unit is not shown because can be placed by the customer on his requirements.

Paddle over speed detector

Version for manual resetting pump

Version for electric resetting pump

Settable intervention speed from 0,5 to 3 m/s

Y = 170 mm with Øe pipe ≥ 340 mm

Y = Øe/2 with Øe pipe < 340 mm

Pipe diameter: minimum 168,3 mm ; maximum 2000 mm

Maximum allowable pressure 25 bar

Applicable Standards

Hydraulic test

Every single butterfly valve is subjected to hydraulic final test with the purpose of verifying the accordance with the prescriptions EN12266 and EN1074:

  • Body test at 1,5 time the PFA (open valve);
  • Seat test at 1,1 time the PFA (closed valve).

Product test

Control of coating: test of thickness, holiday test, impact test, MIBK test.

Conformity to the standards

Product:

  • EN 1074-1 and 2

Plant test:

  • EN 12266
  • EN 1074

Flanges dimension:

  • ISO 5752 series 14

Flanges drilling:

  • EN 1092-2
  • ISO 7005-2

Suitability for potable water:

  • Italian DM 174/04
  • Conformity to foreign norms: KTW (Germany), WRC (U.K.), ACS (France)

Marking

On the body like EN19:

  • Nominal diameter in mm (DN);
  • Nominal pressure in bar (PN);
  • Type of ductile iron;
  • Manufacturer’s logo;
  • Model code;
  • Fusion date.

On the label like EN19:

  • Nominal diameter in mm (DN);
  • Nominal pressure in bar (PN);
  • Maximum operating pressure (PFA);
  • Closing direction;
  • Model code;
  • Manufacturing order, Order confirmation;
  • Manufacturer’s logo.

On the disc:

  • Nominal diameter in mm (DN);
  • Nominal pressure in bar (PN);
  • Type of ductile iron;
  • Manufacturer’s logo;
  • Model code.

Valve selection

To do the right dimensioning of butterfly valve it’s necessary to know the hydraulic parameters and also the configuration required:

  • Standard version (bare shaft and oleo-dynamic actuator)
  • Safety butterfly valve with paddle over speed detector and manual resetting pump (standard version + paddle over speed detector)
  • Safety butterfly valve with electric resetting unit: - without paddle over speed detector; - with paddle over speed detector.

To balance the counterweight is necessary to know:

  • Upstream operative pressure (with open valve)
  • Intervention speed (standard from 0,5 to 3,0 m/s, for other configuration contact the technical-commercial office)

Outlining what we said:

- Data needed for butterfly valve dimensioning to be given by the customer:

Upstream Pressure

Maximum speed in pipe

Flow rate Q

Nominal diameter DN

Measure Unit

Value

- Data needed for safety system dimensioning to be given by the customer:

Exercise Upstream Pressure

Intervention paddle speed

Measure Unit

Value

Hydraulic features

The head loss Δh are variable in function of valve open degree and can be calculated with the following expression:

∆h = ζ.v² 2.g

with ∆h = head loss [m], ζ= head loss coeff, v = nominal speed [m/s], g = 9,81 [m/s2]

The head loss coefficient can be estimated from this diagram:

Determinates the head loss Δh it’s possible to calculate the flow rate Q in m3/h with the following expression (the same expression can be used to, having the project flow rate Q, to determinate the head loss Δh without using the head loss coefficient):

Q = ∆h 10.2 Kv

in which 10,2 is a corrective factor in meters, and Kv is the flow rate coefficient in m3/h, determinable from the following diagram in function of valve open degree:

Otherwise it’s possible to calculate the head loss with valve completely open, having the project flow rate Q, in function of DN, using the following diagram:

Instructions for use

Storage

The butterfly valve will have to be held (if possible) in covered places, the most possible protected from the sun (maximum allowable temperature 70°C in accordance to EN 1074), from the rain and generally from the atmospheric agents. Moreover it will have to be avoided that the seal of the same air valves come to contact with powder or earth

Installation

The operative instruction for installation changes in order to the required configuration (with or without paddle over speed detector, with manual pump or electric resetting unit).

Before do the installation it is necessary to assure that no earth or powder are inside the valve or in contact with the seat. Do a complete manoeuvre of opening and closing. The installation on water pipe is the one with horizontal axis respect the pipe axis and with safety device on hydraulic right side, for other position contact the technical-commercial office. It’s recommended a dismounting joint for valve with DN superior to 150 mm.

In any case, for the installation, refer to specific installation and operating manual.

Maintenance

To guarantee the full efficiency of safety valve, it’s necessary to do periodically a maintenance and a simulation of release movement.

We recommend to do this control every six months and, in any case, before the start up of pipeline.

In any case, for the maintenance, refer to specific installation and operating manual.