LEFF® Function (Low Emission Flip Flop)

The LEFF® feature (integrated in the T.VIS® A-8) is easily activated. The intermittent movement of the valve disk clearly improves the cleaning efficiency. 

Special features and advantages: 

• Low investment costs (short write-off period)
• CIP flow rate independent of temperature
• No intervention in the process control
• Improvement of the cleaning efficiency by the pulsing movement of the valve disks
• Reduction of of approximately 80% in detergent losses during the lifting operation
• Can be used on all VARIVENT® valves with lifting actuator
• Around 70% in cleaning media saved
• Practical tests made on VARIVENT® mixproof valves DN100, type R_L equipped with LEFF® function resulted in a saving potential of cleaning media of approximately 50 m³ p.a.