You have successfully added from to your part list.
Series 600-Z3 Steam Check Valves are used in high cycle steam applications. They feature a bronze body heavy internal construction for longer life, conical 316 stainless steel disc for full fluid flow, Super Teflon seat for higher temperature rating and heavy duty stainless guide road to enhance disc guidance. Series 600-Z3 silent check valves have a low pressure drop and can be installed in a horizontal or vertical position. Maximum Pressure: 400psi (27.6 bar) WOG (non-shock) @ -20°F to 100°F (-29°C to 38°C) and 150psi (11 bar) WSP @ 366°F (186°C).