Hard Back Seat Ductile Iron Wafer Butterfly Valve

The main difference between soft back seat wafer butterfly valve and hard back seat wafer butterfly valve is the seat material:

• 1. Compared with the hard-backed valve seat, the soft-backed valve seat has a wider contact surface with the pipe flange, and the installation and sealing performance is better, without the need for a special flange for butterfly valves;
• 2. The soft-backed valve seat is highly replaceable and does not require any special tools. The replacement can be completed;
• 3. The wall thickness of the hard-backed valve body is relatively thin, and the valve body is easily deformed. The wall thickness of the soft-backed valve body is larger than that of the hard-backed valve body, and the valve body is heavier. The different shape designs prevent the valve body from deforming. Deformation.
• 4. The vulcanization process of the soft-backed valve seat is more perfect, and there will be no phenomenon of immature rubber of the hard-backed valve seat. The rubber performance is more reliable.
• 5. The soft-backed butterfly valve has small torque.