Centerline Type Butterfly Valve
The centerline butterfly valve, also called concentric butterfly valve, features aligned centerlines for the valve stem, disc, and body, offering a simple structure and easy manufacturing. Commonly rubber-lined, it ensures tight contact between the disc and seat to prevent leakage. The valve's sealing structure aligns the disc's sealing line with the body and stem axis, with smooth flat surfaces near the stem and a spherical outer edge for effective sealing. The rubber seat liner is molded for optimal surface roughness, minimizing wear and leakage.
Centerline Type Butterfly Valve Product List
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PTFE Lined Concentric Butterfly Valve, A216 WCB, DN500, PN10
This 500 mm concentric butterfly valve is engineered for reliable flow control in corrosive and general industrial applications. The ASTM A216 WCB carbon steel body provides robust structural integrity and pressure containment, while the resilient seated design with PTFE lining delivers superior chemical...
Centerline Type Butterfly Valve
Pneumatic Actuated Butterfly Valve, GGG40, 8 IN, CL150, Wafer
This butterfly valve is built to API 609 standards with a ductile iron GGG40 body for strength and impact resistance. The concentric disc design suits general service applications. It measures 8 inch and is rated for Class 150 LB. The resilient seated liner provides bubble-tight sealing and compatibility...
Centerline Type Butterfly Valve
PTFE Lined Concentric Butterfly Valve, DI GGG40, 3 IN, Wafer
This concentric butterfly valve combines a ductile iron GGG40 body with a full PTFE lining to deliver chemical resistance at a lower cost than solid alloy construction. Manufactured to API 609 standards, the 3-inch (DN80 / 80 mm) valve is rated for Class 150 LB and features a resilient seated design...
Centerline Type Butterfly Valve
EPDM Lined Concentric Butterfly Valve, API 609, WCB, 8 Inch
This 8-inch (200 mm) concentric butterfly valve features a carbon steel body manufactured to ASTM A216 WCB and complies with API 609 standards. It is rated for Class 150 LB pressure and designed in a wafer configuration for easy installation between flanges. The valve includes an EPDM rubber lining,...
Centerline Type Butterfly Valve
GGG40 Concentric Butterfly Valves, API 609, DI, DN150, PN16
These resilient seated butterfly valves feature a GGG40 ductile iron body, which provides higher tensile strength and impact resistance than standard gray cast iron. The valve conforms to API 609 standards and is available in 6 inch (DN150 / 150 mm) size with dual pressure ratings of Class 150 LB and...
Centerline Type Butterfly Valve
API 609 Concentric Butterfly Valves, WCB, 6 Inch, CL150, Lug
API 609 Concentric Butterfly Valves Factory produces a 6-inch (150 mm) lug-end butterfly valve built for general industrial service. The valve body is cast from carbon steel ASTM A216 WCB, a material known for its strength and weldability. It carries a Class 150 LB pressure rating and meets API 609...
Centerline Type Butterfly Valve
ASTM A216 WCB Concentric Butterfly Valve, API 609, 24 IN, Lug
China ASTM A216 WCB Butterfly Valve is a concentric disc valve designed for reliable flow control in pipeline systems. This valve features a 600 mm (24 inch) nominal diameter with a Class 150 LB pressure rating. The body is cast from ASTM A216 WCB carbon steel. It meets API 609 standards for butterfly...
Centerline Type Butterfly Valve
GGG40 Concentric Butterfly Valve, API 609, 28 IN, CL150, Lug
This concentric butterfly valve is designed for water, wastewater, and general industrial flow control. It features a GGG40 ductile iron body with an ASTM B148 C95800 aluminum bronze disc. The valve is sized at 28 inches (700 mm) with a Class 150 LB pressure rating and meets API 609 standards. Lug ends...
Centerline Type Butterfly Valve
PTFE Lined Butterfly Valve, API 609, A216 WCB, DN100, PN16
The PTFE Lined Butterfly Valve is manufactured to API 609 standards, ensuring high quality and reliability. It features a carbon steel ASTM A216 WCB body with a PTFE lining, providing excellent corrosion resistance. The valve has a size of DN100 (4 inches) and a pressure rating of PN16 (Class 150 LB)....
Centerline Type Butterfly Valve
PFA Lined Butterfly Valve, API 609, A216 WCB, 2 Inch, CL150
The PFA Lined Butterfly Valve is engineered according to API 609 standards, featuring a carbon steel ASTM A216 WCB body. With a 2-inch (DN50) size, it operates within a pressure class of 150 LB and PN20, offering excellent durability and performance. Its wafer ends ensure easy installation, and the...
Centerline Type Butterfly Valve
Electric Actuated Butterfly Valve, API 609, DI, DN100, PN16
The Electric Actuated Butterfly Valve is a high-performance valve designed for efficient flow control. Manufactured according to API 609 standards, it features a concentric type design with a durable ductile iron body. This 4-inch (DN100) valve is rated for PN16 (Class 150 LB) and is equipped with double...
Centerline Type Butterfly Valve
Pneumatic Actuated Butterfly Valves, API 609, A351 CF8, 2 IN
The Pneumatic Actuated Butterfly Valves Factory offers high-performance valves designed to API 609 standards. These valves feature a concentric design with a stainless steel body (ASTM A351 CF8) and are available in DN50 (2 inch) size with a pressure rating of PN16 (Class 150 LB). Equipped with wafer...
Centerline Type Butterfly Valve
API 609 Butterfly Valve, ASTM A351 CF8, 4 IN, CL150, DN100
The API 609 Butterfly Valve is a concentric-type butterfly valve. Constructed from ASTM A351 CF8 stainless steel, it features a 4-inch, DN100 size with a Class 150 LB, PN16 rating. The valve is equipped with double flanged ends for secure connections and wormgear operation for smooth and reliable manual...
Centerline Type Butterfly Valve
Marine Spiral Butterfly Valve, API 609, GGG40, 4 IN, 5K, 10K
This Marine Spiral Butterfly Valve, manufactured as per API 609 standards, features a ductile iron GGG40 body for strength and corrosion resistance. With a 4-inch (DN100) size, it is designed to handle pressures of JIS 5K and 10K, making it ideal for marine applications. The valve comes with wafer-type...
Centerline Type Butterfly Valve
ASTM A351 CF8 Butterfly Valve, API 609, 2 Inch, CL150, Wafer
The China ASTM A351 CF8 Butterfly Valve is a concentric type valve designed to meet API 609 standards. Featuring a durable stainless steel body and a PTFE seal, this 2-inch, DN50 valve is rated for Class 150 LB and PN20 pressure classes. It is equipped with wafer ends for easy installation and secure...
Centerline Type Butterfly Valve
PTFE Sealed Butterfly Valve, API 609, A216 WCB, 4 IN, 150 LB
The PTFE Sealed Butterfly Valve, manufactured with a concentric type design, adheres to API 609 standards for reliable performance in fluid control systems. It features a carbon steel ASTM A216 WCB body, offering durability and corrosion resistance. With a 4-inch (DN100) size, Class 150 LB, and PN20...
Centerline Type Butterfly Valve
Concentric Lining Butterfly Valve
Concentric Lining butterfly valve adopts lining on all the parts that contact with medium inside of body, the stainless steel which is resistance of corrosion is used as stem and disc to ensure the corrosion resistance of different strong corrosive medium. The valve body and disc materials can be made of cast iron, carbon steel or stainless steel to ensure the bearing strength. Many kinds of soft sealing material such as NBR, EPDM or PTFE etc can be used as lining material to adapt to different corrosive medium or working temperature.
Structural Features
- The indicator plate has multiple opening angles ranging to 90 degrees, which is convenient to locate the gate.
- Top flange as per ISO 5211 to allow for the easy installation of gear box and actuators.
- O-rings provide positive stem sealing performance.
- Note: Alternative packing solutions available.
- Dual stem design reduces valve operating torque.
- Upper and lower bearings minimize operating torque.
- The semi-circular butterfly plate design reduces operating torque and promotes extended service life.The seal ring is supported to achieve disassembly and prevent leakage of the seal ring.
- The seal ring extends to the end of the body and is installed without additional gaskets.
ISO 5211 Top Mounting
Different End Connections Available:
Pressure/Temperature Ratings Chart:
