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Flanged Butterfly Valve (Metal Seat)

Flanged Butterfly Valve

Flanged Butterfly Valve (Metal Seat)

Size Range: DN50-DN2000

Material: SS304, SS316

Connection Options: Flanged End

Pressure: 0.6Mpa ~ 4.0Mpa

Working Temperature: -29°C to 425°C

Sealing Options: SS304 + Graphite

Applicable Medium: Water, oil, gas, acetic acid, nitric acid

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Product Overview

A flanged metal seated butterfly valve is a robust flow control valve designed for high-temperature, high-pressure, and abrasive applications. Its metal-to-metal seat design provides excellent wear resistance, fire safety, and long service life where soft-seated valves are unsuitable. Commonly used in oil and gas, power plants, chemical processing, mining, and steam systems, this valve offers reliable shut-off, structural stability, and dependable performance in demanding industrial pipelines.

Product Features

  • Metal-to-metal sealing for high temperature, high pressure, and abrasive service
  • Flanged body design ensures strong pipeline connection and structural stability
  • Excellent wear and fire resistance, suitable for harsh operating conditions
  • Reliable shut-off performance with long service life
  • Ideal for oil & gas, power generation, chemical, mining, and steam applications

Specification Parameters

ITEMSPECIFICATION
Nominal Pressure (MPa)PN0.6PN1.0PN1.6PN2.5PN4.0
Shell Test Pressure(MPa)PT0.9PT1.5PT2.4PT3.8PT6.0
Low-Pressure Closure Test0.6 MPa
Suitable MediumWater, Oil, Gas, Acetic Acid, Nitric Acid
Suitable Temperature−29 °C ~ 425 °C

Product parts materials

MATERIAL NAMECARBON STEELSTAINLESS STEEL
BodyWCBCF8CF8M
DiscWCBCF8CF8M
Stem13Cr304316
Seat Ring304 + Graphite304 + Graphite304 + Graphite
PackingGraphiteGraphiteGraphite

Flanged Butterfly Valve D343 Diagram

The main shape and connection dimensions – D343 in (mm)

NOMINAL DIAMETERSTRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmSHORT LLONG LHD343PN0.6 MPaPN1.0 MPa
H1A1B1DD1Z-dDD1Z-d
501089501123501802001401104-141651254-18
651128701153701802001601304-141851454-18
801147901203801802001901504-182001608-18
1001277101384201802002101704-182201808-18
1251406301644601802002402008-182502108-18
1501405501755552702802652258-182852408-22
2001525102007604004253202808-183402958-22
25016547024383040042537533512-1839535012-22
30017843025089545056044039512-2244540012-22
35019039028095045056049044512-2250546016-22
400216350305119053558054049516-2256551516-26
450222330350125553558059555016-2261556520-26
500229310380130553558064560020-2267062020-26
600267290445134057066075570520-2678072520-30
700292270480152075055086081024-2689584024-30
800318250530171075055097592024-30101595024-33
90033023058018107505501075102024-301115105028-33
100041021065019609007501175112028-301230116028-36
1200470200760225010009251405134032-331455138032-39
1400530190850243510009251630156036-361675159036-42
16006001801030278010009251830176040-361915182040-48
18006701701230302011009802045197044-392115202044-48
20007601501350327011009802265218048-422325223048-48
NOMINAL DIAMETER (mm)STRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmLHD343PN1.6 MPaPN2.5 MPa
H1A1B1A3B3DD1Z-dD
501081123501802002502551651254-18165
651121153701802002502551851454-18185
801141203801802002502552001608-18200
1001271384201802002502552201808-18235
1251401644601802002502552502108-18270
1501401755552702803003152852408-22300
20015220076040042530031534029512-22360
25016524383040042530031540535512-26425
30017825089545056030031546041012-26485
35019028095045056030031552047016-26555
400216305119053558030031558052516-30620
450222350125553558057571464058520-30670
500229380130553558057571471565020-33730
600267445134057066065681084077020-36845
700292480152075055065681091084024-36960
8003185301710750550656810102595024-391085
90033058018107505507858631125105028-391185
100041065019609007507858631255117028-421320
1200470760225010009257858631485139032-481530
140053085024351000925——1685159036-481755
1600600103027801000925——1930182040-561975
1800670123030201100980——2130202044-562195
2000760135032701100980——2345223048-622425
NOMINAL DIAMETERSTRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmSHORT LLONG LHD343PN4.0MPa
H1A1B1DD1Z-d
501081501123501802001651254-18
651121701153702702801851458-18
801141801203802702802001608-18
1001271901384202702802351908-22
1251402001644603804202702208-26
1501402101755553804203002508-26
20015223020076040042537532012-30
25016525024383040042545038512-33
30017827025089545056051545016-33
35019029028095045056058051016-36
400216310305119053558066058516-39
450222330350125553558068561020-39
500229350380130553558075567020-42

Flanged Butterfly Valve D673 Diagram

The main shape and connection dimensions – D673 in (mm)

NOMINAL DIAMETERSTRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmSHORT LLONG LHD673PN0.6 MPaPN1.0 MPa
L±2A2B2DD1Z-dDD1Z-d
5010895011243161671401104-141651254-18
6511287011546166751601304-141851454-18
8011479012046173961901504-182001608-18
100127710138521871142101704-182201808-18
125140630164561941262402008-182502108-18
150140550175562161402652258-182852408-22
200152510200602561643202808-183402958-22
2501654702436828620537533512-1839535012-22
3001784302507832723744039512-2244540012-22
3501903902807834826049044512-2250546016-22
400216350305———54049516-2256551516-26
450222330350———59555016-2261556520-26
500229310380———64560020-2267062020-26
600267290445———75570520-2678072520-30
700292270480———86081024-2689584024-30
800318250530———97592024-30101595024-33
900330230580———1075102024-301115105028-33
1000410210650———1175112028-301230116028-36
1200470200760———1405134032-331455138032-39
1400530190850———1630156036-361675159036-42
16006001801030———1830176040-361915182040-48
18006701701230———2045197044-392115202044-48
20007601501350———2265218048-422325223048-48
NOMINAL DIAMETER (mm)STRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmLHD643PN1.6 MPaPN2.5 MPa
H2B2A2A3B3DD1Z-dD
50108112625245722502551651254-18165
65112115625245722502551851454-18185
80114120645245722502552001608-18200
100127138675355922502552201808-18235
125140164715355922502552502108-18270
150140175800355923003152852408-22300
20015220085025017030031534029512-22360
25016524392525017030031540535512-26425
300178250103545022030031546041012-26485
350190280107045022030031552047016-26555
400216305119045022030031558052516-30620
450222350125065028057571464058520-30670
500229380129065028057571471565020-33730
600267445145585038065681084077020-36845
700292480158585038065681091084024-36960
80031853017001250380656810102595024-391085
900330580186512503807858631125105028-391185
1000410650201512503807858631255117028-421320
1200470760225012503807858631485139032-481530
1400530850—————1685159036-481755
16006001030—————1930182040-561975
18006701230—————2130202044-562195
20007601350—————2345223048-622425

Flanged Butterfly Valve D943 Diagram

The main shape and connection dimensions – D943 in (mm)

NOMINAL DIAMETERSTRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmSHORT LLONG LHD943PN0.6 MPaPN1.0 MPa
H3A3B3DD1Z-dDD1Z-d
501089501125302502551401104-141651254-18
651128701155302502551601304-141851454-18
801147901205652502551901504-182001608-18
1001277101386002502552101704-182201808-18
1251406301646402502552402008-182502108-18
1501405501757053003152652258-182852408-22
2001525102007753003153202808-183402958-22
25016547024394530031537533512-1839535012-22
300178430250107030031544039512-2244540012-22
350190390280114030031549044512-2250546016-22
400216350305121030031554049516-2256551516-26
450222330350133557571459555016-2261556520-26
500229310380141557571464560020-2267062020-26
600267290445160565681075570520-2678072520-30
700292270480184465681086081024-2689584024-30
800318250530204065681097592024-30101595024-33
90033023058022557858631075102024-301115105028-33
100041021065023807858631175112028-301230116028-36
120047020076026407858631405134032-331455138032-39
14005301908502886  1630156036-361675159036-42
160060018010303156  1830176040-361915182040-48
180067017012303421  2045197044-392115202044-48
200076015013503685  2265218048-422325223048-48
NOMINAL DIAMETER (mm)STRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmLHD943 PN1.6 MPaPN2.5 MPa
H3A3B3A3B3DD1Z-dD
501081125302502552502551651254-18165
651121155302502552502551851454-18185
801141205652502552502552001608-18200
1001271386002502552502552201808-18235
1251401646402502552502552502108-18270
1501401757053003153003152852408-22300
20015220077530031530031534029512-22360
25016524394530031530031540535512-26425
300178250107030031530031546041012-26485
350190280114030031530031552047016-26555
400216305121030031530031558052516-30620
450222350133557571457571464058520-30670
500229380141557571457571471565020-33730
600267445160565681065681084077020-36845
700292480184465681065681091084024-36960
8003185302040656810656810102595024-391085
90033058022557858637858631125105028-391185
100041065023807858637858631255117028-421320
120047076026407858637858631485139032-481530
14005308502886——1685159036-481755
160060010303156——1930182040-561975
180067012303421——2130202044-562195
200076013503685——2345223048-622425
NOMINAL DIAMETERSTRUCTURE LENGTH (STANDARD)EXTERNAL DIMENSIONCONNECTION DIMENSION (STANDARD)
mmSHORT LLONG LHD943PN4.0MPa
H3A3B3DD1Z-d
501081501125302502551651254-18
651121701155302502551851458-18
801141801205652502552001608-18
1001271901386002502552351908-22
1251402001646402502552702208-26
1501402101757053003153002508-26
20015223020077530031537532012-30
25016525024394530031545038512-33
300178270250107030031551545016-33
350190290280114030031558051016-36
400216310305121030031566058516-39
450222330350133557571468561020-39
500229350380141557571475567020-42

Specification Applications

  • Oil & Gas pipelines – reliable shut-off under high pressure and temperature
  • Power generation systems – steam, boiler, and thermal oil service
  • Chemical & petrochemical plants – corrosive and high-temperature media
  • Mining & slurry handling – abrasive fluids and solids-laden flow
  • Industrial steam networks – stable performance with frequent thermal cycling
Product Categories
Tags

Valve Actuation

Process Optimization

Precision Engineering

Pipeline Solutions

Industrial Valves

Flow Control

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