VFS Butterfly Valves are used in all types of bulk solids processing plants where interception of gravity fed or pneumatically conveyed dry powders or granules are required.

VFS Butterfly Valves can be fitted beneath hoppers, bins, silos or other type conveyors, or material interception in pneumatc conveying. Single or Double Flanged Models are available.

For closing bins, hoppers and silos containing powders or granular materials, VFS Butterfly Valves are among the most widely used equipment worldwide.


What used to be custom-built items for specific applications, have been turned by WAM® into a mass-produced industrial product with features that allow extremely versatile use.

Performance & Technical Features - Benefits:
• V1FS with top flange and beaded bottom section suitable for fixing of flexible sleeve
• V2FS with identical top and bottom flange
• Pressure-proof up to 0.2 bar (2.9 PSI)
• High-pressure die-cast semi-bodies manufactured from aluminium alloy
• Disc in cast iron, SINT® engineering polymer, stainless steel
• Seals for standard or food-grade application
• Small number of components
• Lightweight and easy to handle
• Interchangeable discs
• Highly abrasion-resistant
• Easy to fit
• Quick maintenance