Wenzhou Starry Valve Co., Ltd. is one of the most reliable manufacturers and suppliers of butterfly valve flange type in China. We are committed to providing high quality customized valves with low price. If you're going to buy bulk durable butterfly valve flange type, welcome to get quotation from our factory.
| Size Range | DN50 ~ DN1200 (NPS 2" ~ 48") |
| Pressure Rating | ANSI Class150, Class300, Class600; PN16, PN25, PN40 |
| Temperature Range | ≤200℃ (PTFE/EPDM Soft Seal); ≤425℃ (Carbon Steel Hard Seal); ≤600℃ (Stainless Steel/Alloy Hard Seal) |
| Connection Type | ANSI B16.5 Standard Flanged End (RF / RTJ optional) |
| Body Material | A216 WCB Carbon Steel, CF8/CF8M Stainless Steel, WC6/WC9 Alloy Steel, Ductile Iron |
| Sealing Type | Double Offset Soft Seal, Triple Offset Metal Hard Seal, bidirectional zero-leakage sealing optional |
| Operation Type | Manual lever, worm gear, electric, pneumatic, hydraulic actuation optional |
| Execution Standard | API 609, ASME B16.10, ASME B16.5, API 598, MSS-SP-25 |
| Structural Feature | Butterfly valve flange type adopts integral flange body and offset butterfly plate structure, fully compliant with American standard pipeline systems. Double-offset and triple-offset optimized structures realize friction-free opening and closing. Standard ANSI flange connection features simple installation, positioning accuracy and convenient disassembly and maintenance. Streamlined arc-shaped butterfly plate forms low-resistance flow channel, ensuring high flow efficiency and stable operation. Dual soft/hard sealing configurations adapt to normal-temperature zero-leakage and high-temperature high-pressure severe working conditions, with strong pipeline universality and flexible on-site adaptability. |
| Suitable Media | Water, steam, high-temperature hot oil, compressed air, natural gas, crude oil, refined petroleum products and weakly corrosive chemical fluids. Widely applied in petrochemical plants, power station auxiliary systems, urban heating pipe networks, water supply and drainage projects, and general industrial ANSI standard pipeline fluid control systems. |
Features
Butterfly valve flange type equipped with strict ASME B16.5 standard flange end, perfectly matching ANSI standard pipeline flanges, bolts and gaskets. Compared with welded butterfly valves, the flange connection allows quick disassembly, inspection and replacement without cutting pipelines. It solves the maintenance difficulty of welded valves, greatly improving on-site construction efficiency and reducing later equipment overhaul costs, ideal for projects requiring regular valve maintenance.
Double-offset structural design eliminates contact friction between butterfly plate and valve seat during opening and closing strokes, avoiding abrasive wear of sealing surfaces. Upgraded triple-offset metal hard seal adopts precision metal sealing pair with automatic wear compensation function, maintaining long-term stable zero-leakage performance. It effectively solves aging and leakage problems of traditional soft-seal valves under high temperature and pressure fluctuation, extending overall service life.
Soft Seal Version: Adopts high-elasticity PTFE/EPDM sealing material, achieving bubble-tight zero leakage, suitable for normal-temperature clean water, gas and conventional fluid systems with strict shutoff requirements.
Metal Hard Seal Version: All-metal hard sealing pair with high-temperature and scouring resistance, stably applicable for 425℃ high-temperature steam, high-pressure oil gas and impurity-containing industrial media, meeting severe service operation standards.
Optimized streamlined full-flow channel design without flow dead zone or turbulent area. The arc-shaped butterfly plate minimizes fluid pressure loss during operation, effectively reducing pipeline system energy consumption. Fast 90° rotary switching realizes rapid cut-off and stepless flow regulation, improving pipeline fluid transmission efficiency and system operating stability.
Integral cast high-rigidity valve body resists pipeline pressure impact and thermal deformation. Multiple material configurations of carbon steel, stainless steel and alloy steel cover low, medium and high temperature working conditions. Various actuation modes are optional to meet automatic control and remote regulation requirements of industrial pipelines. Standard ANSI specification fully adapts to overseas EPC projects and American standard supporting pipeline systems.
Typical Application Equipment
- Petrochemical refining, chemical process and ANSI standard industrial piping systems
- Power plant auxiliary water, gas and medium-temperature steam circulation pipelines
- Urban central heating, municipal water supply and drainage pipe network projects
- Oil and gas medium-pressure transmission pipelines and fluid regulation systems
- Overseas standard industrial construction, equipment supporting and pipeline control projects
Working Principle & Application Notes
Butterfly valve flange type adjusts and cuts off medium flow through 90° rotary movement of offset butterfly plate. The unique offset structure ensures non-friction operation, flexible switching and reliable sealing. Soft seal type is suitable for normal-temperature clean media with zero-leakage requirements; metal hard seal type adapts to high-temperature, high-pressure and slightly impurity-containing working conditions. ANSI flange design facilitates frequent disassembly and maintenance, not applicable for ultra-high pressure pipelines requiring integral welding sealing. Corrosive media need stainless steel or alloy material upgrade. Please confirm ANSI pressure class, sealing type, flange face type and actuation mode before ordering.
Hot Tags: butterfly valve flange type, China butterfly valve flange type manufacturers, suppliers, factory
