Disc Check Valve

We required disc check valves.  (disc check valves are designed to be sandwiched between flanges i. E. Wafer type. They are suitable for use on a wide range of fluids for applications in process lines, hot water systems, steam and condensate systems etc.) Size required 1 / 2" to 4". Material of construction (moc) ss 304 OR ss 316. Quantity required in miscellaneous sizes & our total quantity will be 200 nos.