10" Wafer Check Cast Steel /Stainless Steel with Viton Seat 300# Dual Disc Titan CV44CSV10" Wafer Check Cast Steel Stainless Steel with Viton Seat 300# Dual Disc Titan CV44CSV Resilient Soft Seats Minimal Head Loss Quick Closure to Reduce Water Hammer VITON PROPERTIES: Offers a broad range of chemical resistance and excellent heat resistance. Good mechanical properties and compression set resistance. Often used in applications where nothing else will work. Fair low temperature resistance and limited hot water resistance and shrinkage.