Double Flanged Butterfly Valve
Double Flanged Butterfly Valve Manufacturer
MVS Valves Double Flanged Butterfly Valve is engineered for precise and low-torque flow control in a wide range of pipeline systems. Designed with a concentric disc and resilient seat configuration, this valve ensures reliable shut-off and seamless operation across water, oil, gas, and chemical applications. Built in accordance with API 609, BS 5155, and ASME standards, it supports working pressures up to 16 bar and offers dependable leak-tight performance in both intermittent and continuous operations. Available in DN 50 to DN 1200 sizes, the valve is suitable for industrial pipelines that demand compactness, strength, and versatility.
The double-flanged body of this valve supports easier installation and strong mechanical strength, making sure that improved durability under fluctuating pressure conditions. MVS Valves manufactures its API 598 Double Flanged Butterfly Valve to meet rigorous performance and sealing expectations. Whether used in horizontal or vertical orientation, it delivers excellent performance without compromising flow dynamics or efficiency. To address various fluid characteristics, the valve is offered with integrally molded resilient liners and comes with a wide range of sealing materials that match industrial media requirements.
Material selection is a key strength of MVS’s design approach. Options such as Stainless Steel Double Flanged Butterfly Valve, Carbon Steel Double Flanged Butterfly Valve, Duplex Double Flanged Butterfly Valve, Duplex Stainless Steel Double Flanged Butterfly Valve and Super Duplex Double Flanged Butterfly Valve are manufactured to meet corrosive and high-pressure system demands. Whether for municipal water lines or critical chemical processing pipelines, these valves offer exceptional resistance to wear and corrosion while maintaining stable, smooth control.
With flexible actuation compatibility — manual lever, gearbox, pneumatic actuator, or electric actuator — the valve can be integrated effortlessly into automated systems or manual flow lines. The resilient seat variants are tailored using materials like EPDM, Nitrile, Viton, Hypalon, and Silicone, enhancing the valve’s chemical compatibility and lifecycle performance. This ensures the API 609 Double Flanged Butterfly Valve meets global industrial flow control expectations with consistent results across service conditions. Manufactured by MVS Valves with precision and expertise, the API 598 Double Flanged Butterfly Valve offers unmatched reliability, safety, and quality assurance, making it the preferred choice for modern industries that value performance and long-term durability.
Specification
| Specification | Details |
|---|---|
| Valve Type | Double‑flanged concentric butterfly valve |
| Size Range | 2″–50″ (DN 50–DN 1200) |
| Pressure Rating | PN 10/16, ANSI Class 125/150, PN 25 |
| Flow Torque | Low‑torque operation via lever, gearbox, pneumatic or electric actuation |
| Standards | API 609, BS 5155; tested per API 598, EN 12266‑1, ISO 5208 |
| Face‑to‑Face | ANSI B16.10 / BS 5155 / API 609 / ISO 5752 Series 13/14 |
| End Connections | Integral cast double‑flanged to ANSI B16.5, BS, DIN, JIS standards |
| Seat Leakage Class | Class VI – zero leakage |
| Actuation | Manual lever (DN≤200), worm‑gear, pneumatic, electric |
| Service Media | Water, gas, oil, chemical, steam applications |
Material of Construction
| Body & Disc | Ductile Iron (ASTM A126 Gr B) / Cast Iron; Carbon Steel (WCB); Stainless Steel CF8/CF8M | CF3/CF3M, Alloy 20, Duplex/Super Duplex, Hastelloy C‑276, Titanium |
| Seat / Liner | EPDM, NBR, Viton | PTFE, Hypalon, Silicone, metal seats |
| Stem / Shaft | Stainless Steel (e.g., A276‑410 / X20Cr13) | Duplex SS or specialty alloys |
| Bushings & O‑rings | PTFE bushings, NBR/EPDM seals | Graphite, high‑temp elastomers |
| Coatings | Epoxy powder on ductile iron (150 µm) | Special linings for chemical or potable water use |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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Double Flanged Butterfly Valve
Frequently Asked Questions
Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us
What is a double flanged butterfly valve and how does it work?
A concentric butterfly valve with integral cast flanges on both sides, so it bolts into the line exactly like a gate or globe valve rather than being clamped between flanges. A quarter turn swings the disc into or across the flow. The flanged body is the strongest of the three styles and carries pipe loads properly, which is why it is specified for large diameters, buried service and lines where the valve must take mechanical stress.
Which body, disc and seat materials are available?
Body and disc in Ductile Iron (ASTM A126 Gr B) or cast iron, Carbon Steel (WCB), or CF8/CF8M stainless. Seat and liner in EPDM, NBR or Viton, with PTFE, Hypalon, silicone and metal seats available. Stem and shaft in stainless (A276-410 / X20Cr13), duplex or specialty alloys, with PTFE bushings and NBR/EPDM seals, or graphite and high-temperature elastomers. Ductile iron bodies carry a 150 µm epoxy powder coating, with special linings for chemical or potable water use.
What size, pressure rating and standards apply?
2″–50″ (DN 50–DN 1200) at PN 10/16, ANSI Class 125/150 or PN 25. Built to API 609 and BS 5155, tested to API 598, EN 12266-1 and ISO 5208, with face-to-face per ANSI B16.10 / BS 5155 / API 609 / ISO 5752 Series 13/14 and integral cast flanges to ANSI B16.5, BS, DIN or JIS. Seat leakage is Class VI — zero leakage. Actuation by manual lever up to DN 200, worm gear, pneumatic or electric.
When should I choose double flanged over wafer or lug?
Whenever the valve has to carry pipe loads rather than just seal — large diameters, buried or chambered installations, lines subject to movement or vibration, and anywhere a wafer body would be awkward to support. It is also the choice at PN 25, above what the wafer and lug designs cover. The trade-off is weight, length and cost.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. Potable water linings, special seat and shaft materials, and gear or actuated assemblies are built to order.