What exactly are butterfly valves?
What Are the Different Parts of a Butterfly Valve?
Body
Stem
Seat
Disc
What Are the Different Types of Butterfly Valves?
Butterfly Valves Classified by Valve Body Material
Carbon Steel
Stainless Steel
Nickel Alloy Steel
Titanium and Titanium Alloys
Nickel Aluminum Bronze
Ductile Iron
Cast Iron
Butterfly Valves Classified by End Connection Type
Wafer Type
Lug Type
Butt Welded Type
Butterfly Valves Classified by Seat Type
Butterfly Valve with a Metal Seat
Soft or Resilient Seated Butterfly Valve
Butterfly Valves Classified by Valve Operation
Manual Butterfly Valve
Lever Handle
Automatic Butterfly Valve
Pneumatic Actuated Butterfly Valve
Electric Actuated Butterfly Valve
Hydraulic
Butterfly Valves Classified by Valve Operation
Zero Offset / Concentric
Double Eccentric / Double Offset
Triple Offset Butterfly Valve
Butterfly Valves Classified by Sealing Material
Butterfly Valves with a Rubber Lining
Rubber lined butterfly valves are intended for use in isolating or regulating flow by utilizing rubber as the sealing material. The closing mechanism is a disc that sits in the center of the valve body and is connected to an actuator or handle via a shaft that runs through the top of the body. In comparison to a ball valve, the disc of a rubber lined butterfly valve causes a pressure drop because it is always in the flow. Rubber-lined butterfly valves, unlike ball valves, can be shut off easily and without requiring too much support because they are lightweight.
Butterfly valves with rubber linings are fully operational in a 90-degree rotation motion. These valves can also be opened incrementally to throttle flow. Manual rubber lined butterfly valves can be used to control flow, but actuated rubber lined butterfly valves provide more precision.
Rubber lined butterfly valves are lightweight valves that offer a low-cost, maintenance-free solution to high-pressure applications such as the pulp and paper industry, fuel handling systems, petrochemical processing, and HVAC operations.
Butterfly Valves with Plastic Lining
Plastic-lined butterfly valves use a plastic sealing material to regulate, stop, and start the flow of fluid. They are excellent for on/off operations, throttling, and control applications in powdery media, liquid, or gaseous service.
Butterfly Valves with Metal Lining
Metal lined butterfly valves have a metal to metal seal, allowing them to withstand high pressure and temperature conditions. Metal-lined butterfly valves are durable and wear-resistant due to their consistent sealing performance. These valves are intended for use in a variety of applications, including operations in the petroleum, fuel, and food industries, as well as systems requiring high fire resistance.
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