Bi Directional Knife Gate Valve

South American Valve is a leading Bi Directional Knife Gate Valve Supplier in Bolivia. A bidirectional knife gate valve is a type of valve that allows flow in both directions, unlike the unidirectional knife gate valve that only permits flow in one direction. It provides an effective shut-off capability and is commonly used in applications where bidirectional flow control is required.

South American Valve is a leading Bi Directional Knife Gate Valve Supplier in Bolivia. Bidirectional knife gate valves are commonly used in applications where fluid flow can occur in both directions and where reliable shut-off and control are required. Their versatility, bidirectional sealing capability, and ability to handle solids make them suitable for a wide range of industries and processes.

Benefits

• Bi-directional Sealing: The design of a bidirectional knife gate valve allows for sealing in both flow directions. The gate or blade is designed with two beveled edges, enabling it to seal against the seat in both the forward and reverse flow directions. This bidirectional sealing capability ensures tight shut-off and prevents any backflow or leakage.
• Versatility in Flow Control: Bidirectional knife gate valves offer versatility in handling different flow conditions. They can be used in applications where the flow direction can change, or in systems where flow reversal may occur. This makes them suitable for processes that require bidirectional flow control, such as mixing applications, diverting flow between two directions, or applications where intermittent flow occurs.
• Reliable Shut-Off Capability: Similar to unidirectional knife gate valves, bidirectional versions provide excellent shut-off capabilities. When the valve is closed, the gate forms a tight seal against the seat in both directions, preventing any fluid passage. This ensures reliable shut-off, reducing the risk of leakage or contamination in the system.
• Solid and Slurry Handling: Bidirectional knife gate valves are well-suited for handling solid-laden fluids and slurry applications. The design of the valve, including the robust gate and seat materials, allows for efficient passage of solids without clogging or blockages. They are commonly used in industries such as mining, wastewater treatment, and pulp and paper for applications involving bidirectional flow of slurry or thick fluids.
• Abrasion and Corrosion Resistance: Bidirectional knife gate valves are often constructed using materials that offer resistance to abrasion and corrosion, such as stainless steel, cast iron, or other specialty alloys. This ensures their durability and longevity in harsh operating conditions, even when handling abrasive or corrosive fluids.
• Easy Maintenance and Replacement: Similar to unidirectional knife gate valves, bidirectional versions are designed for easy maintenance and component replacement. The gate and seat can be accessed and replaced without significant effort, minimizing downtime during maintenance activities.
• Actuation Options: Bidirectional knife gate valves can be actuated using various methods, including manual handwheel, pneumatic cylinder, or electric motor. The choice of actuation allows for efficient and precise control over bidirectional flow, enabling automation and integration into control systems.

Applications

• Water and Wastewater Treatment: Bidirectional knife gate valves are used in water and wastewater treatment plants for controlling the flow of water, sludge, and wastewater. They are employed in processes such as clarifiers, sedimentation tanks, and sludge handling systems where the flow direction can vary.
• Mining and Minerals: In mining operations, bidirectional knife gate valves are used for handling abrasive slurries, tailings, and mineral concentrates. They are commonly found in processes such as flotation cells, thickener underflow control, and concentrate transport systems.
• Pulp and Paper: Bidirectional knife gate valves are utilized in the pulp and paper industry for handling pulp, paper stock, and fibrous materials. They are commonly found in applications like stock chests, pulp storage tanks, and pulp screening systems.
• Chemical Processing: In chemical processing plants, bidirectional knife gate valves are employed for controlling the flow of corrosive fluids, chemicals, and slurries. They are used in processes such as chemical reactors, mixing vessels, and acid storage tanks.
• Power Generation: Bidirectional knife gate valves are used in power plants for controlling the flow of various media, including water, steam, and coal slurries. They are commonly found in applications like boiler feedwater systems, ash handling systems, and cooling water circuits.
• Oil and Gas: Bidirectional knife gate valves find applications in the oil and gas industry for controlling the flow of crude oil, refined products, and various fluids in pipelines and storage tanks. They are commonly used in applications such as tank farms, pipeline pigging stations, and terminal facilities.
• Construction and Dredging: Bidirectional knife gate valves are utilized in construction projects and dredging operations for controlling the flow of sediments, sand, and slurries. They are commonly used in processes such as sediment control, sand handling, and dredge spoil disposal.

Description

• Body: Carbon Steel, Ductile Iron, SS316
• Knife: SS304, SS316
• Disc: SS304, SS316L
• Wedge: SS304, SS316, SS316L
• Packing: PTFE
• Seal Ring: Polyurethane, EPDM, NBR, VITON
• Yoke: SS304, SS316
• Packing Gland: CF8, WCB
• Nominal Size: DN50 to DN400
• Nominal Pressure: Class150 to Class30, PN10
• End Type: Wafer Type, Lug Type
• Operation: Handwheel, Electric Actuated, Pneumatic Actuated

Parts

• Body
• Gate
• Seat
• Stem
• Actuator
• Bonnet