Concentric Soft Seated Lug Butterfly Valve

This design allows the removal of components on one side of the valve while the opposite side remains pressurized, making it especially suitable for applications requiring temporary isolation— such as at pump outlets, storage tanks, and hull structures. Below is a brief overview of the valve’s key features and characteristics: Concentric Design In a concentric butterfly valve, the stem axis is aligned with the center of the disc and the valve bore, creating a concentric sealing arrangement when closed. This design optimizes flow passage and minimizes pressure drop across the valve. Butterfly Valve Disc The valve incorporates a disc mounted on a central stem. When fully open, the disc aligns parallel to the flow direction, allowing unobstructed media passage. When closed, it rotates perpendicular to the flow to achieve shutoff. Rubber Seal Seat A replaceable rubber seat serves as the sealing element between the disc and the valve body, ensuring bubble-tight sealing performance in the closed position. Application Scenarios This valve type is widely used in water treatment, wastewater systems, HVAC, chemical processing, oil and gas, power generation, and general industrial applications. Actuation Methods The lug concentric butterfly valve can be operated manually via handwheel or gear operator, or fitted with electric or pneumatic actuators for remote and automated control.