China Butterfly Valve Manufacturer – Ductile Iron Body & Duplex Stainless Steel Disc

Introduction:

1. Premium Material Combination  

  Ductile Iron Body : Offers 30% higher tensile strength than standard cast iron, with fusion-bonded epoxy coating (300µm) for corrosion resistance in seawater, acids, and chlorinated environments.  

  Duplex Stainless Steel Disc (UNS S32205): Combines 22% chromium, 5% nickel, and 3% molybdenum for exceptional resistance to pitting, crevice corrosion, and stress cracking .

2. High-Performance Actuation Compatibility  

  Pre-machined ISO 5211 mounting pad supports electric, pneumatic, or hydraulic actuators for automated control.  

3. custom OEM/ODM production

Specializing in custom OEM/ODM production, we tailor valve specifications—including coatings, flange types, and actuation—to meet your exact project requirements.

4. Reduced Lifecycle Costs  

  Duplex disc’s 45 HRC hardness minimizes wear from abrasive media, extending service life by 50% compared to 316SS discs.  

  - Maintenance-free stem seals with self-lubricating graphite layers.  

Why Partner with Tianjin Worlds Valve?

1. Expertise in OEM/ODM Services  

 As a trusted ISO 9001-certified manufacturer, we specialize in custom OEM/ODM designs, ensuring valves meet your exact specifications while adhering to global certifications.

2. High Performance

  Vulcanized valve seat has very high corrosion resistance and is generally used to control some corrosive fluids with strong acidity and alkalinity.  

3. Global Compliance  

  - Pre-certified for EU, UK, and Asian markets.  

4. Customization  

  - Optional gearbox position indicators, locking devices, or extended stems.

Technical Parameters：

Size	DN32-DN600	DN650-DN2000
Working pressure	16Bar	10Bar
Shell	24Bar	15Bar
Seal	18Bar	11Bar
Operating Temperature	-20℃~+120℃
Operating Environment	Ballast and bilge system          Chemical processing Desalination plants   Drilling rigs    Drinking water Dry powder     Food and beverage     Gas plants HAVC  Mining industry  Paper industry    Sand handling     Seawater    Sugar industry Thermo technical water treatment   Waste water
Driving  method	Hand  Lever  Worm Gear  Electric  Pneumatic

Main Material:

Name	Material
Body	Cast Iron  Ductile Iron  Carbon Steel  Stainless Steel  AL-Bronze
Disc	Ductile Iron  Carbon Steel Stainless Steel  AL-Bronze
Shaft	Stainless Steel  Monel K500
Seat	BUNA  NBR  EPDM  VITON  PTFE TEFLON HEPDM  Neoprene  Hypalon Natural rubber

Executive Standard:

Design Standard	EN 593 , MSS SP67 API 609  BS5155
Inspection & Test	API 598  ISO 5208  EN 12266
End Standard	ANSI B16.1 CL. 125LB & B16.5 CL. 150LB AS 2129 Table D & E   BS 10 Table D & E DIN 2501 PN6, PN10 & PN16 EN 1092 PN6, PN10 & PN16 ISO 2531 PN6, PN10 & PN16 ISO 7005 PN6, PN10 & PN16 KS B 1511 / JIS B 2210 5K & 10K MSS SP44 CL. 150LB  AWWA C207 SABS 1123 Table 1000/3 & Table 1600/3
Face to Face	ISO 5752 , EN 558 , MSS SP67 and API 609 DIN3202
Top Flange	ISO 5211(according customer’s needs)

Conclusion:

Elevate your industrial systems with Tianjin Worlds Valve’s advanced ductile iron & duplex steel butterfly valves. Source CE, and ISO 9001 certified，Competitive pricing, fast delivery—request a quote today!