Tuchenhagen invented the mix-proof valve in 1966 (VARIVENT System).

The VARIVENT® system is more than just a valve.  It is a low maintenance  modular design system that favors all applications, ensuring both product and hygiene integrity. But through ongoing R&D they continuously expand and improve their range of products:

• VARIVENT® Single Seat Valves
• VARIVENT® Double Seat Valves
• STERICOM® Aseptic Valves
• VARIVENT® Butterfly Valves
• Feedback
• Accessories
• Special Valves