Product Description Bi-directional Metal Seal Butterfly Valve Features: 1)The Butterfly Valve is small and light, and easy to operate. 2)The Valve is in full and half axle structure, the disc is in streamline and truss structure, which make the valve high intensity, large flow area and small resistance. 3)The alloy steel for sealing face has the flowing advantages: Corrosion-resistance, high temperature resistance, rubbing crocking and long life. 4)With Two-way sealing, the valve can be installed in any direction without the restriction of medium's flow way. 5)The flexible part of flexible butterfly valve can be flex freely or fixed according to working condition.