This really depends upon the style and make of the butterfly valve but ours do not as they utilise the seat which overhangs the body of the valve to form the gasket. This makes installation and stocking much easier.
A butterfly valve operates by rotating a disc or vane perpendicular to the flow direction within the pipeline.
Butterfly valves are installed between two flanges in a pipeline using bolts and nuts.
Proper alignment and torqueing of the bolts are essential to ensure a leak-tight connection.
This depends upon the type of butterfly valve but generally center line butterfly valves can take flow in either direction.
To some extent butterfly valves can be used for flow control by adjusting the position of the disc to regulate the flow rate within the pipeline. This is generally not a very accurate way of achieving flow control however.
While butterfly valves can be used for throttling applications, BUT they are generally better suited for on/off service or moderate throttling.
For precise throttling control, specialized control valves may be more suitable.
To open a butterfly valve, rotate the valve handle or actuator in the appropriate direction (usually clockwise) until the disc is parallel to the flow direction.
A lugged butterfly valve has threaded holes (lugs) on the valve body that allow it to be bolted directly to a pipeline without the need for additional flanges.
This design simplifies installation and removal of the valve from the pipeline.
The main difference between lug and wafer butterfly valves is their connection method.
Butterfly valves are commonly used in applications where a simple and economical valve solution is required for on/off or moderate throttling service.
They are suitable for various industries including water treatment, HVAC, chemical processing, and more.
Ductile Iron Butterfly Valves are butterfly valves with bodies made of ductile iron, a type of cast iron that has been treated to enhance its strength and ductility.
Double Acting Butterfly Valves are butterfly valves that are actuated using a pneumatic, electric or hydraulic actuator. These actuators operate in both the opening and closing directions, providing bidirectional control of the valve.
Pneumatic butterfly valves use compressed air to actuate the valve mechanism, providing reliable and efficient operation for various industrial applications. They offer quick response times and can be easily automated for remote control.
Air actuated butterfly valves use compressed air to actuate the valve mechanism, allowing for remote operation and automation. They are commonly used in applications where manual operation is impractical or where precise control is required.
A Double Flanged Butterfly Valve is a type of butterfly valve that features flanged connections on both ends, allowing it to be installed directly between flanges in a pipeline without the need for additional couplings or adapters.
An Electric Butterfly Valve is a butterfly valve actuated by an electric motor or actuator. These valves offer precise control and can be easily automated for remote operation using electrical signals.
Butterfly valves with stainless steel discs offer enhanced durability, corrosion resistance, and reliability, making them suitable for demanding applications where harsh fluids or aggressive environments are present.
SKU: BFDDA
Ductile Iron Double Acting Butterfly Valve with 316 Stainless Steel DiscSize 50mm to 600mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Double Acting Pneumatic
SKU: BFDD
Ductile Iron Double Flanged Butterfly ValveSize Flanged AS4087 PN16 50mm to 1200mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Lever or Gear Box
SKU: BFDDE
Ductile Iron Double Flanged Electric Butterfly ValveSize 50mm to 600mm
Body FBE coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Electric
SKU: BFDDSR
Ductile Iron Double Flanged Spring Return Butterfly ValveSize Flanged AS4087 PN16 50mm to 1200mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Spring Return Pneumatic
SKU: BFDE
Ductile Iron Electric Butterfly ValveSize 50mm to 600mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Electric
SKU: BFD
Ductile Iron Manual Butterfly Valve with 316 Stainless Steel DiscSize 50mm to 600mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Lever or Gear Box
SKU: BFDSR
Ductile Iron Spring Return Butterfly Valve with 316 Stainless Steel DiscSize 50mm to 600mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Spring Return Pneumatic
SKU: BFDDDA
Ductlie Iron Double Flanged Double Acting Butterfly ValveSize Flanged AS4087 PN16 50mm to 1200mm
Body FBE coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Double Acting Pneumatic
SKU: BFL
Lugged Ductile Iron Butterfly ValveSize 50mm to 600mm
Body FBE Coated Ductile Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Lever or Gearbox
SKU: BFLDA
Lugged Ductile Iron Double Acting Butterfly ValveSize 50mm to 600mm
Body FBE coated Cast Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Double Acting Pneumatic
SKU: BFLE
Lugged Ductile Iron Electric Butterfly ValveSize 50mm to 600mm
Body FBE coated Cast Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Electric
SKU: BFLSR
Lugged Ductile Iron Spring Return Butterfly ValveSize 50mm to 600mm
Body FBE coated Cast Iron
Seat EPDM
Disc 316 Stainless Steel
Pressure Up to 16 BAR (depending upon size)
Actuation Spring Return Pneumatic
This really depends upon the style and make of the butterfly valve but ours do not as they utilise the seat which overhangs the body of the valve to form the gasket. This makes installation and stocking much easier.
A butterfly valve operates by rotating a disc or vane perpendicular to the flow direction within the pipeline.
Butterfly valves are installed between two flanges in a pipeline using bolts and nuts.
Proper alignment and torqueing of the bolts are essential to ensure a leak-tight connection.
This depends upon the type of butterfly valve but generally center line butterfly valves can take flow in either direction.
To some extent butterfly valves can be used for flow control by adjusting the position of the disc to regulate the flow rate within the pipeline. This is generally not a very accurate way of achieving flow control however.
While butterfly valves can be used for throttling applications, BUT they are generally better suited for on/off service or moderate throttling.
For precise throttling control, specialized control valves may be more suitable.
To open a butterfly valve, rotate the valve handle or actuator in the appropriate direction (usually clockwise) until the disc is parallel to the flow direction.
A lugged butterfly valve has threaded holes (lugs) on the valve body that allow it to be bolted directly to a pipeline without the need for additional flanges.
This design simplifies installation and removal of the valve from the pipeline.
The main difference between lug and wafer butterfly valves is their connection method.
Butterfly valves are commonly used in applications where a simple and economical valve solution is required for on/off or moderate throttling service.
They are suitable for various industries including water treatment, HVAC, chemical processing, and more.
Ductile Iron Butterfly Valves are butterfly valves with bodies made of ductile iron, a type of cast iron that has been treated to enhance its strength and ductility.
Double Acting Butterfly Valves are butterfly valves that are actuated using a pneumatic, electric or hydraulic actuator. These actuators operate in both the opening and closing directions, providing bidirectional control of the valve.
Pneumatic butterfly valves use compressed air to actuate the valve mechanism, providing reliable and efficient operation for various industrial applications. They offer quick response times and can be easily automated for remote control.
Air actuated butterfly valves use compressed air to actuate the valve mechanism, allowing for remote operation and automation. They are commonly used in applications where manual operation is impractical or where precise control is required.
A Double Flanged Butterfly Valve is a type of butterfly valve that features flanged connections on both ends, allowing it to be installed directly between flanges in a pipeline without the need for additional couplings or adapters.
An Electric Butterfly Valve is a butterfly valve actuated by an electric motor or actuator. These valves offer precise control and can be easily automated for remote operation using electrical signals.
Butterfly valves with stainless steel discs offer enhanced durability, corrosion resistance, and reliability, making them suitable for demanding applications where harsh fluids or aggressive environments are present.
