• The sealing part can be adjusted for more radiance and reliable sealing performance.
• The expandable valve seat can reduce the wear of the valve plate and valve seat.
• Ultra low torque demand, lower actuator energy demand, larger sealing contact area, and longer valve life.
COVNA company main produce: Expansion Butterfly Valve
• Novel and reasonable design, unique structure, light weight, convenient operation, and fast opening and closing.
• In addition to being able to adjust and intercept the flow to compensate for the thermal expansion and cooling system caused by pipeline temperature difference, it also provides convenience for installation, replacement, and maintenance of valves.
• The sealing part can be adjusted for more radiance and reliable sealing performance.
• The expandable valve seat can reduce the wear of the valve plate and valve seat.
• Ultra low torque demand, lower actuator energy demand, larger sealing contact area, and longer valve life.
• Proven superiority for abrasive materials and solids.
| Nominal Size | Operated Type | Work Pressure | Work Temperature | Seal Material | Disc Material | Body Material | Medim | Connection Standard |
|---|---|---|---|---|---|---|---|---|
| DN80 ↓ 350 | Pneumatic Actuato | PN10, PN16 | -10-80°C | EPDM, Fluororubber, Silicon Rubber | Stainless steel + Teflon, Tungsten carbide | Stainless steel, Carbon steel | Powder | PN10/PN16, ANSI150, D1N16, JIS10K |
COVNA company main produce: Expansion Butterfly Valve
