NSEN Flange type Triple offset butterfly valve could provide both bi-directional sealing and uni-directional sealing, it depends on the customer requirements and working condition. But please notice that different type sealing and sealing structure has the different ranges.
• Multi-layer sealing & Metal to metal sealing
• Bi-directional & Uni-directional
• Low opening torque
• Non-rubbing rotation seating
• Torque seated
• Tilted cone sealing face