Van bướm trung tâm có lót khí nén cho ngành hóa chất và năng lượng với chứng nhận CE

Product DescriptionThe SEN series centerline butterfly valve is designed for media shut-off, flow regulation, and automated control in industrial piping systems. Its optimized dual-stem split-shaft structure provides lower operating torque, reduced flow resistance, smooth operation, and reliable performance. The streamlined disc improves the flow coefficient (Cv/Kv) while reducing pressure loss, vibration, and operating resistance. The seat features three sealing ribs to enhance sealing reliability and reduce deformation caused by flange compression. With its long service life, wear resistance, frequent-operation capability, and wide adaptability, the SEN centerline butterfly valve is widely used in water and wastewater treatment, powder conveying, seawater desalination, power generation, chemical processing, food and beverage production, and general industrial pipelines.Product FeaturesProduct Advantages1.Dual Split-Shaft Design: Upper and lower short shafts reduce flow obstruction, operating torque, and stem stress while improving reliability. 2.Streamlined Disc Design: The streamlined disc increases flow capacity and reduces resistance, pressure drop, and turbulence. 3.Three-Sealing-Rib Seat Design: Three raised ribs reduce flange compression and seat deformation while improving sealing stability. 4.Ramped Contact Sealing: The ramped sealing surface reduces wear, while disc adjustment helps compensate for seat wear and maintain low torque. 5.Stem Sealing Protection: Replaceable O-rings and a sealed bottom plug help prevent leakage and contaminant ingress. 6.Standardized Mounting Interface: The EN ISO 5211 flange supports manual, pneumatic, and electric drives, with wafer and lug connections available.
1.Low-torque operation:The split-shaft structure, streamlined disc, and optimized seat design reduce operating resistance and actuator sizing cost. 2.Low resistance and pressure drop: The disc and short-shaft design improve flow capacity for both regulation and on-off control. 3.Reliable sealing: Three sealing ribs provide multiple sealing supports and improve sealing after wafer installation.
4.Reduced seat deformation: Raised ribs absorb flange clamping force, helping the seat retain its shape and operate smoothly.
5.Long service life: The optimized disc-seat contact reduces wear and supports frequent operation.
6.Wide flange compatibility: Available for EN 1092, ASME B16.5, JIS B 2239, BS 10, and other standards.
7.Flexible material options: Body, disc, seat, and stem materials can be selected for different media and operating conditions.
8.Automation-ready: Compatible with pneumatic and electric actuators, worm gears, handles, and control accessories.Thông số kỹ thuật

SEN DN40-DN2000 Centerline Butterfly Valve
Structure Type	Centerline sealing structure; dual split-shaft design (upper and lower short shafts)
Applicable Size	DN40-DN2000
Standard Pressure	DN40-DN200: 16 bar; DN250-DN2000: 10 bar
Maximum Pressure	DN40-DN600: 20 bar; DN700-DN2000: 16 bar
Vacuum Application	Vacuum sealing down to 0.001 bar absolute pressure, depending on pressure, medium, and valve material
Valve Body	Ductile iron EN 1563 JS1030, carbon steel ASTM A216 WCB, stainless steel ASTM A351 CF8M, etc.
Valve Disc	Stainless steel ASTM A351 CF8/CF8M/CF3M, 2507, 1.4462, 1.4529, 1.4539, Hastelloy, aluminum bronze C95800, ductile iron with nylon coating / Halar coating, etc.
Valve Seat	NBR, X-NBR, EPDM, EPDM-H, EPDM FDA, EPDM WRAS, FPM/FPM-B, etc.; selectable according to temperature, food-grade, corrosion-resistant, and water treatment requirements
Valve Stem	SS420, SS431, 17-4PH, etc.
Bearing	Oil-free bearing; copper and other materials available
Bolts / Fasteners	Stainless steel materials such as SS304 and SS316
Actuation Accessories	Aluminum alloy handle, stainless steel cast handle, worm gearbox, pneumatic actuator, electric actuator, etc.
Top Flange Standard	EN ISO 5211, suitable for mounting handles, worm gear operators, pneumatic actuators, or electric actuators
Temperature Range	-20°C to +180°C, depending on pressure, medium, and valve material
Leakage Standard	Reference standards: ISO 5208 Rate A (medium: water)
Connection Type	Wafer type, lug type, etc.; to be confirmed according to project piping standards
Driving Method	Handle, worm gear operator, pneumatic actuator, electric actuator, and automated control devices
Applicable Media	Water, seawater, wastewater, air, gas, powder conveying media, food-grade media, certain corrosive media, etc.

Hồ sơ công tySEN valve actuators hold internationally recognized qualifications, including the SIL3 Functional Safety certification issued by TÜV SÜD. 
Our manufacturing facility is located at No. 8 Shiqian Road, Shitangwan, Luoshe Town, Huishan District, Wuxi City. The factory covers a total area of 8,000 square meters and is equipped with over 60 processing machines. We have a dedicated team of more than 80 employees, including over 10 mid-to-senior technical experts, with our sales and service network spanning across China. 
SEN is committed to the R&D and manufacturing of pneumatic valves, electro-hydraulic valves, and pneumatic valve accessories. We are equipped with advanced, specialized machinery for valve processing, manufacturing, and testing. With an annual production capacity of over 50,000 valve units, our total annual output value reaches 120 million RMB. We strictly adhere to the ISO 9000 quality management system to ensure scientific management, delivering products that satisfy our customers through superior quality and comprehensive service. Our products are widely used in industries such as lithium batteries, new energy materials, environmental protection equipment, pharmaceuticals, chemicals, and power plants. 
Backed by years of industry experience and continuous R&D, SEN has established a robust management system, advanced manufacturing processes, and a comprehensive after-sales service network. 
Haikou Shengyanuo International Trade Co., Ltd. operates on the core philosophy of "surviving through quality and growing through integrity." We are dedicated to building SEN into a premier professional brand in the control valve industry!CertificationsPackaging & ShippingYour convenience is our priority. We work with trusted logistics providers such as FedEx and UPS and support Air, Sea, and Land transportation to match your timeline and budget. Additionally, we accommodate various trade terms (EXW, FOB, DAP, DDP) to provide you with the most convenient and cost-effective shipping experience.CÂU HỎI THƯỜNG GẶP1.Are you a trading company or a manufacturer with direct production sources? We are a professional valve manufacturing factory with independent workshops, CNC production lines and complete pressure & tightness testing equipment. We support in-house production, customized processing and OEM & ODM export without middleman markup.   2.Can you provide OEM/ODM customization services? Is logo printing available? Customization is available, including body engraving, logo printing, customized packaging, material upgrade, dimension modification and actuator matching. We can develop new molds strictly according to your drawings and parameter lists.   3.What qualifications and export certification documents can be provided? We supply Material Test Certificate (MTC), hydrostatic test report and factory inspection certificate. Certifications like CE, ISO,  WRAS, DNV and customs documents including CO, FORM A can be applied upon request.   4.How should packaging and export transportation be arranged? Valves are packed with bubble wrap, inner box and export carton or wooden case to avoid damage. We offer FOB port, CIF destination port and DDP door-to-door delivery, with sea freight, air freight and express delivery available.   5.How long is the product warranty period? 18-month warranty from shipment date or 12 months after installation (whichever comes first). Free spare parts or replacement will be offered for quality defects caused by factory production. Damage from incorrect installation, foreign particle abrasion or over-limit working condition is not covered by warranty.