Clark Solutions Series 400 Hard Seat Valves 442 FFS

Steel or 316 SS, 1/4" NPT to 1-1/2" NPT, 10,000 PSI Pressure Rating Metal to metal hard seat design is 100% Helium leak tested to 1 x 10-4ml/s 10,000 psi pressure rating (@200°F maximum) Blow out proof stem that provides a secondary stem seal in the full open position Stem packing below the threads prevents thread galling & corrosion Viton O-Ring & Teflon back-up ring stem seals All 316SS stems (even in steel valves) for longer life Stem and bonnet threads are rolled for greater strength and smoother operation Angled stem for precise flow metering One piece bonnet with a metal to metal seal to the valve body below the bonnet threads Bonnet lock pin to prevent accidental loosening Optional panel mount bonnet and panel nuts Electroless Nickel plated finish on carbon steel valves Electropolish finish on stainless steel valves Vinyl bonnet & stem dust cap Specifications: Models 402-404, 602-604 Hard Seat Technical Data Maximum Pressure Rating: Steel: 10,000 psi Stainless Steel: 10,000 psi Standard O-Ring: Viton® Standard Back-up Ring: Teflon® Orifice size: 0.187" Flow Coefficient: 0.44 Model 406-412 Hard Seat Technical Data Maximum Pressure Rating: Steel: 10,000 psi Flow Stainless Steel: 10,000 psi Standard O-Ring: Viton® Standard Back-up Ring: Teflon® Orifice size: 0.438" Flow Coefficient: 2.70