Soval 840-020 The 2" Cast Iron Wafer Style Butterfly Valve - Ductile Disc is the only cast iron wafer style butterfly valve you need for your waterworks, fire protection, well water, irrigation, sewage, industrial and plumbing flow control needs. High quality build, long lasting performance and great customer service is what has kept in business for over 50 years and we look forward to serving you into the far future for all your flow control project needs.