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Dual-eccentric Flange Type Cast Structure Butterfly Valve

Introduction

A Dual-Eccentric Flange Type Cast Structure Butterfly Valve is an advanced valve designed for efficient flow regulation and reliable isolation in fluid systems. This valve features a dual-eccentric design, which means the disc and shaft are offset, reducing friction and ensuring smooth operation. The unique design minimizes wear on the sealing surface, which results in a longer service life and reduced maintenance requirements. Additionally, the flange connection design ensures a secure, easy-to-install valve, offering a reliable seal and high performance under varying pressures and temperatures.

The cast structure of this butterfly valve enhances its strength and durability, making it ideal for handling challenging fluids and environments. It is widely used in industries such as oil and gas, water treatment, power generation, and chemical processing, where reliable flow control, efficient sealing, and easy installation are critical. The dual-eccentric design ensures minimal torque is needed for operation while providing an effective shutoff, making it a preferred choice for applications demanding high-performance standards.

Applications

Dual-eccentric Flange Type Cast Structure Butterfly Valve is trusted across various industries for its precision, durability, and reliability. Explore its wide-ranging applications below:

Oil & Gas icon

Oil & Gas

Used for regulating the flow of oil, natural gas, and refined products in pipelines and processing plants, ensuring reliable sealing and efficient flow control under high-pressure conditions.

Power Generation icon

Power Generation

Employed in steam, feedwater, and cooling systems to control fluid flow, offering high durability and leak-proof performance in demanding, high-pressure environments.

Chemical Processing icon

Chemical Processing

Handles the flow of chemicals in pipelines, offering a durable and reliable valve solution for both high and low-pressure applications in chemical plants.

Water Treatment icon

Water Treatment

Installed in water distribution and treatment systems to ensure precise flow regulation and leak-proof sealing in both municipal and industrial applications.

HVAC Systems icon

HVAC Systems

Used in HVAC systems for regulating air or water flow, ensuring efficient operation and tight shutoff in heating, ventilation, and cooling applications.

Marine Applications icon

Marine Applications

Installed in marine and offshore systems for fluid flow control, such as ballast water, fuel, and cooling systems, providing efficient and reliable operation in marine environments.

Technical Specifications

butterfly valve graph

Worm Gear Flanged Butterfly Valve

butterfly valve graph

Electric Flanged Butterfly Valve

butterfly valve graph

Pneumatic Flanged Butterfly Valve

Main Dimensions

0.6MPa mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
50108150140110901434-Ф 1412
651121701601301101434-Ф 1412
801141801901501281634-Ф 1816
1001271902101701481634-Ф 1816
1251402002402001781838-Ф 1816
1501402102652252021838-Ф 1816
2001522303202802582038-Ф 1816
25016525037533531222312-Ф 1816
30017827044039536522412-Ф 2220
35019029049044541522412-Ф 2220
40021631054049546522416-Ф 2220
45022233059555052022416-Ф 2220
50022935064560057024420-Ф 2220
60026739075570567030520-Ф 2224
70029243086081077530(26)524-Ф 2624
80031847097592088030(26)524-Ф 3027
9003305101075102098034(26)524-Ф 3027
100041055011751120108038(28)528-Ф 3030
120047063014051340129542(28)532-Ф 3330
140053071016301560151056(32)536-Ф 3633
160060079018301760171063(34)540-Ф 3633
180067087020451970192069(36)544-Ф 3936

Main Outline Dimensions and Weight

0.6MPa mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
5010826717263140180--------------1242--
6511229018063140180--------------1347--
8011432019063140180320185178180------1450--
10012734219863140240340198178180------1760--
12514038022363140240380223178180------2780--
15014041524663140300415241178180------29110--
2001524702988417030051226323537069532527545130--
2501655353288417040057029223537075035527569170--
30017860636510820040066834023537093547537886200--
3501906954081082004007453852353701000510378122280--
4002167554461282406008274252353701145590378141320--
4502228154751522406009154622353701205632530191395--
5002299055251683006009955002353701256665530260500--
600267105061032019235011836052455151526830530380600--
700292127679523719235014607342455151640903530450800--
800318138483723716835015898032455151786972530650890--
90033015008852371684501856990360540191710526808301040--
10004101620946785330450195810503605402600117068010501400--
12004702185116578533045020131165360540------14001850--
14005302315131078533045021861312360540------19002664--
16006002675144086533060025311438385565------29003450--
20006702920158086555060027951580385565------40004450--
22009503170172586565060030551726300770------53005900--
240010003415184586565060032691859520817--------6700--
260011103670197286565060035241924520817--------7500--
280011903830210086565060037652080450973------------
300012704100223586585060040252210450973------------

Note: * Strucural length of valves in the table: DN<2000 to ISO5752 13 series: DN2000, to ISO5752 14 series.

1MPa mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
501081501651251021834-Ф 1816
651121701851451221838-Ф 1816
801141802001601382038-Ф 1816
1001271902201801582038-Ф 1816
1251402002502101882238-Ф 1816
1501402102852402122238-Ф 2220
2001522303402952682438-Ф 2220
25016525039535032026312-Ф 2220
30017827044540037026412-Ф 2220
35019029050546043026416-Ф 2220
40021631056551548226416-Ф 2624
45022233061556553228420-Ф 2624
50022935067062058528420-Ф 2624
60026739078072568530(34)520-Ф 3027
70029243089584080035(34)524-Ф 3027
800318470101595090538(36)524-Ф 3330
90033051011151050100538(38)528-Ф 3330
100041055012301160111044(38)528-Ф 3633
120047063014551380133055(44)532-Ф 3936
140053071016751590153565(48)536-Ф 4239
160060079019151820176075(52)540-Ф 4845
180067087021152020196085(56)544-Ф 4845

Main Outline Dimensions and Weight

1MPa mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
5010826717263140180--------------1242--
6511229017863140180--------------1347--
8011432518563140180320185180178------1450--
10012734519363140240340198180178------1760--
12514038021963140240382220180178------2780--
15014041524563140240415241180178------29110--
2001524702988417030051226337023574036727545130--
2501655353288417030057029237023590044337869190--
30017860636510820040066834037023599049337886210--
3501906954081082004007453853702351155575378122310--
4002167554461282404008274253702351205600530141380--
4502228154751522406009154623702351290643530191460--
5002299055251683006009955003702351395705530260580--
600267105061032019260011836055152451665838530380690--
700292127679523719235014607345152451882942680450850--
80031813848372371683501589803515245209310666806501000--
90033015008852371683501856990540360------8301220--
1000410162094678533045019581050540360------10501600--
12004702185116578533045020131165540360------14002150--
14005302315131078533045021861312540360------19002610--
16006002675144086533045025311438565385------29003450--
18006702920158086555060027951580565385------40004900--
20009503170172586565060030551726770300------53005900--
220010003340193544065080033651980973450--------8368--
240011103625211044065080036552140973450--------11792--

Note: * Strucural length of valves in the table: DN<2000 to ISO5752 13 series: DN2000, to ISO5752 14 series.

Main Dimensions

1.6MPa mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
501081501651251021834-Ф 1816
651121701851451221838-Ф 1816
801141802001601382038-Ф 1816
1001271902201801582038-Ф 1816
1251402002502101882238-Ф 1816
1501402102852402122238-Ф 2220
20015223034029526824312-Ф 2220
25016525040535532026312-Ф 2624
30017827046041037828412-Ф 2624
35019029052047042830416-Ф 2624
40021631058052549032416-Ф 2627
45022233064058555034(40)420-Ф 3027
50022935071565061036(44)420-Ф 3330
60026739084077072540(54)520-Ф 3633
70029243091084079540(40)524-Ф 3633
800318470102595090041(42)524-Ф 3936
90033051011251050100048(44)528-Ф 3936
100041055012551170111559(46)528-Ф 4239
120047063014851390133078(52)532-Ф 4845
140053071016851590153084(58)536-Ф 4845
1600600790193018201750102(64)540-Ф 5652
1800670870213020201950110(68)544-Ф 5652

1.6MPa mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
5010826717263140180--------------------
65112290175631401160--------------------
8011432018563140160--------------------
10012734219563140160513265180178------------
12514036520963140300560295180178------45105--
15014041524363140300605300180178------------
2001525102638415040074932137023569532727560135--
2501655672958415040080333037023575035527575150--
300178665342108200600880365370235955472378110260--
3501907393851082006009604103702351033515378160325--
40021682543015224060010324453702351185595530210405--
45022291046915224080011184873702351270632530241490--
50022999050016830080011905203702351335665530350700--
600267121061819232080013806253702351642829680510855--
7002921475746238237400158274551524517859056807301150--
80031816008102382374001713810515245191597068010301370--
900330187010003307854001870875540360------12401610--
1000410200010654307856002000940540360------15601920--
12004702215117043078560021181060540360------22602510--
14005302430131955086580023281325565385------26103000--
16006002700144355086580025501450565385------30504700--
18006702938159565086580028161598770300------57256500--
20009503210174365086580030651743794684------80408700--

Note: * Strucural length of valves in the table: DN<2000 to ISO5752 13 series: DN2000, to ISO5752 14 series.

2.5MPa mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
501081501651251022034-Ф 1816
651121701851451222238-Ф 1816
801141802001601382438-Ф 1816
1001271902351901622538-Ф 2220
1251402002702201882638-Ф 2624
1501402103002502182838-Ф 2624
20015223036031027830312-Ф 2624
25016525042537033532312-Ф 3027
30017827048543039534416-Ф 3027
35019029055549045038416-Ф 3330
40021631062055050540416-Ф 3633
45022233067060055546420-Ф 3633
50022935073066061548420-Ф 3633
60026739084577072048(58)520-Ф 3936
70029243096087582050524-Ф 4239
800318470108599093053(54)524-Ф 4845
90033051011851090103057(58)528-Ф 4845
100041055013201210114063(62)528-Ф 5652
120047063015301420135070532-Ф 5652
140053071017551640156076536-Ф 6256
160060079019751860178084540-Ф 6256
180067087021952070198590544-Ф 7064

Main Outline Dimensions and Weight

2.5MPa mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
5010827817863140180--------------------
6511230518263140160--------------------
8011432018563140160552265180178--------82--
10012735020063140300585290180178--------105--
12514037521063140300610305180178--------120--
15014042524563140400765315180178--------135--
2001525262708415040082030437023574036727564195--
2501655903028415060091033637023589044337881250--
3001786953601082006001000386370235985495378144280--
35019078942010824060010554253702351155575530173340--
40021684843512824080011084563702351206603530272390--
45022294347515230080011404903702351284643530322490--
500229107955016832080012385523702351390705535370490--
600267135267519223740013996355152451660835680571570--
70029214957596852374001611750540360------808480--
80031816408356852374001782820540360------940960--
90033017658867307856001915886565385------13001350--
100041018859457307856002040945565385------17201880--
12004702100105585086580021841053770300--------2180--
14005302325116385086580023751164794684--------3200--

Main Dimensions

4.0MPa mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
501081501651251022034-Ф 1816
651121701851451222238-Ф 1816
801141802001601382438-Ф 1816
1001271902351901622438-Ф 2220
1251402002702201882638-Ф 2624
1501402103002502182838-Ф 2624
20015223037532028534312-Ф 3027
25016525045038534538312-Ф 3330
30017827051545041042416-Ф 3330
35019029058051046546416-Ф 3633
40021631066058553550416-Ф 3936
45022233068561056057420-Ф 3936
50022935075567061557420-Ф 4239
60026739089079573572520-Ф 4845
70029243099590084064524-Ф 4845
8003184701140103096072524-Ф 5652
90033051012501140107076528-Ф 5652
100041055013601250118080528-Ф 5652
120047063015751460138088532-Ф 6256
140053071017951680160098536-Ф 6256
1600600790202519001815108540-Ф 7064

Main Outline Dimensions and Weight

4.0MPa mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
5010832018563140160--------------------
6511235020063140300--------------------
8011439524563140300530240180178------------
10012735620563140400555205180178------2676--
12514037521363140400582215180178------43100--
15014043926084150600609260370235------64160--
2001525202758415060075527537023575037527574225--
250165600315108200600818315370235905445378119338--
3001786923651082008009123635152451085538503165399--
3501907764081522408009834065152451160576503259553--
40021686444316830080010584405152451230609503325644--
45022292552523736880011115715152451375665680366885--
5002291128571237368400124560054036015207656804441149--
60026712576642373684001336663540360------------
70029214508804105506001414796730410------------
80031815559054105506001451851730410------------

Note: * Structural length to ISO5752 13 series

Main Dimensions

Class 150 mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
2108150150120.792.119.524-Ф 195/8
21/2112170180139.7104.822.724-Ф 195/8
3114180190152.412724.324-Ф 195/8
4127190230190.5157.224.328-Ф 195/8
5140200255215.9185.724.328-Ф 223/4
6140210280241.3215.925.928-Ф 223/4
8152230345298.5269.92928-Ф 223/4
10165250405362323.830.6212-Ф 257/8
12178270485431.838132.2212-Ф 257/8
14190290535476.3412.835.4212-Ф 291
16216310595539.8469.937216-Ф 291
18222330635577.9533.440.1216-Ф 3211/8
20229350700635584.243.3220-Ф 3211/8
24267390815749.3692.248.1220-Ф 3511/8

Main Dimensions

Class 150LB-A Series mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
26----870806.474968.7224-Ф 3511/4
28292430925863.680071.9228-Ф 3511/4
30----985914.485775.1228-Ф 3511/4
323184701060977.991481.4228-Ф 4111/2
34----11101028.796583232-Ф 4111/2
3633051011701085.8102290.9232-Ф 4111/2
38----12401149.4107387.8232-Ф 4111/2
4041055012901200.2112490.9236-Ф 4111/2
42----13451257.3119497.3236-Ф 4111/2
44----14051314.41245102.1240-Ф 4111/2
46----14551365.21295103.6240-Ф 4111/2
4847063015101422.41359108.4244-Ф 4111/2
50----15701479.61410111.6244-Ф 4813/4
52----16251536.71461116.3244-Ф 4813/4
54----16851593.81511121.1244-Ф 4813/4
56530710174516511575124.3248-Ф 4813/4
58----18051708.21626129248-Ф 4813/4
60----185517591676132.2252-Ф 4813/4

Main Dimensions

Class 150LB-B Series mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
26----785744.571141.8236-Ф 223/4
28292430835795.376245240-Ф 223/4
30----885846.181345244-Ф 223/4
32318470940900.186446.6248-Ф 223/4
34----1005957.392149.7240-Ф 257/8
3633051010551009.697252.9244-Ф 257/8
38----11251070102254.5240-Ф 281
4041055011751120.8108056.1244-Ф 281
42----12251171.6113059.3248-Ф 281
44----12751222.4118160.9252-Ф 281
46----13401284.3123562.4240-Ф 321 1/8
4847063013901335.1128965.5244-Ф 321 1/8
50----14451385.9134068.8248-Ф 321 1/8
52----14951436.7139170.4252-Ф 321 1/8
54----15501492.2144172256-Ф 321 1/8
5653071016001543149273.6260-Ф 321 1/8
58----16751611.3154375.1248-Ф 3511/4
60----17251662.1160076.7252-Ф 3511/4

Main Dimensions

Class 150 mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
3"18032018563140160513263180178------2063--
4"19034219563140160535282180178------2368--
5"20036520963140300563293180178------3875--
6"21041524363140300602322180178------4980--
8"2305102638415040074529637023569032327564105115
10"2505672958415040080532537023575035527581150210
12"270665342108200600883365370235955475378144175250
14"2907393851082006009654083702351032513378172245330
16"31082543015224060010334433702351182598530272330400
18"33091046915224080011204853702351265635530322420480
20"35099050016830080011865183702351335667530370510560
24"390121061819232080013806253702351642830680571745770

Note: * Structural length to ISO5752 14 series

Main Dimensions

Class 300 mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
210815016512792.122.728-Ф 195/8
2 1/2112170190149.2104.825.928-Ф 223/4
3114180210168.3127.12928-Ф 223/4
4127190255200157.232.228-Ф 223/4
5140200280235185.735.428-Ф 223/4
6140210320269.9215.937212-Ф 223/4
8152230380330.2269.941.7212-Ф 257/8
10165250445387.4323.848.1216-Ф 291
12178270520450.838151.3216-Ф 3211/8
14190290585514.4412.854.4220-Ф 3211/8
16216310650571.5469.957.6220-Ф 3511/4
18222330710628.6533.460.8224-Ф 3511/4
20229350775685.8584.264224-Ф 3511/4
24267390915812.8962.270.3224-Ф 4111/2

Main Dimensions

Class 300LB-A Series mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
26----970876.374979.8228-Ф 4515/8
282924301035939.880086.2228-Ф 4515/8
30----109099785792.5228-Ф 4813/4
3231847011501054.191498.9228-Ф 5117/8
34----12051104.9965102.1228-Ф 5117/8
3633051012701168.41022105.2232-Ф 542
38----11701092.21029108.4232-Ф 4211/2
4041055012401155.71086114.8232-Ф 4515/8
42----12901206.51137119.5232-Ф 4515/8
44----13551263.61194124.3232-Ф 4813/4
46----14151320.81245129228-Ф 5117/8
4847063014651371.61302133.8232-Ф 5117/8
50----15301428.81359140.2232-Ф 542
52----15801479.61410114.9232-Ф 542
54----16601549.41467152.9228-Ф 6121/4
5653071017101600.21518154.4228-Ф 6121/4
58----176016511575159.2232-Ф 6121/4
60----18101701.81626164232-Ф 6121/4

Main Dimensions

Class 300LB-B Series mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
26----865803.373789.4232-Ф 3611/4
28292430920857.278789.4236-Ф 3611/4
30----990920.884591.4236-Ф 3913/8
323184701055977.9902103.6232-Ф 4211/2
34----11101031.9953103.6236-Ф 4211/2
36330510117010891010103.6232-Ф 4515/8
38----12201139.81060111.6236-Ф 4515/8
4041055012751190.61114116.3240-Ф 4515/8
42----13351244.61168119.5236-Ф 4813/4
44----13851295.41219127.5240-Ф 4813/4
46----14601365.21270129236-Ф 5117/8
48470630151014161327129240-Ф 5117/8
50----15601466.81378138.6244-Ф 5117/8
52----16151517.61429143.3248-Ф 5117/8
54----167515781480137248-Ф 5117/8
56530710176516511537154.4236-Ф 6021/4
58----18251712.91594154.4240-Ф 6021/4
60----18801763.71651151.3240-Ф 6021/4

Main Outline Dimensions and Weight

Class 300 mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
31803952416363530242180178------2964--
41903552056363552204180178------3976--
52003782156363580214180178------4887--
62104302608484610259180178------54100--
8230523273848475531037023575036827584160--
10250600315108108816340370235909442378118225--
122706933621081089123903702351075535530170338--
142907724051521529804253702351158572530231399--
1631086244016816810574603702351230610530299553--
1833096052519219211405253702351462736680390644--
20350115860323723712435565152451328765680499885--
2439013206932372371420653817351------7261149--

Note: * Structural length to ISO5752 14 series

Class 600 mm

DNLDD1D2bfz-ΦdM
Series 1Series 2
210815016512792.132.478-Ф 195/8
2 1/2112170190149.2104.835.678-Ф 223/4
3114180210168.312738.878-Ф 223/4
4127190275215.9157.245.178-Ф 257/8
5140200330266.7185.751.578-Ф 281
6140210355292.1215.954.7712-Ф 281
8152230420349.2269.962.6712-Ф 3211/8
10165250510431.8323.870.5716-Ф 3511/4
1217827056048938173.7720-Ф 3511/4
14190290605527412.876.9720-Ф 381 3/8
16216310685603.2469.983.2720-Ф 4111/2
18222330745654533.489.6720-Ф 4415/8
20229350815723.9584.295.9724-Ф 4415/8
24267390940838.2692.2108.6724-Ф 5117/8

Class 600 mm

DNL*Worm gear actuationElectricPneumaticWeight(kg)
H1H01E1F1W1H2H02E2F2H3H03A3Warm gearElectricPneumatic
31805002506363606295180178------8279--
41905953406363650358180178------12596--
5200680395108108695371180178------165154--
6210730423152152713387180178------191172--
82308554451681681055417370235------247248--
1025010025361921921172465370235------413308--
1227011506142372371392546515245------576467--
1429012006742372371475579515245------664585--
1631013458232372371557643540360------971807--
1833013978412692691625673540360------11171003--
2035014309783503501679701540360------16391139--
24390158210693503501834775540360------20821767--

Note: * Structural length to ISO5752 14 series

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YDB VALVES LLP

A pioneer manufacturer & supplier company having good experience in the designing and manufacturing of a new concept instrumentation Valves

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Y-21, Khan Real Industrial Estate, N. H. 08, Pelhar, Vasai Phata, Vasai East, Palghar - 401208. INDIA


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