Product Name: Pressure Seal Swing Check Valves NBR Sealing Two-Port Material Non-Return Valve Model NO.: H14X-16T Application: Water Industrial Usage Standard: BSW Flow Direction: Unidirection Sealing Form: Gland Packings Globe Valve Function: Non-Return Pressure: Low Pressure Structure: Swing Connection Form: Thread Media: Water Trademark: yomtey Transport Package: Woodenpackage Specification: DN15-100 Origin: China HS Code: 84818040 Product Description YomteY provides custom brass check valve as your request. A check valve, clack valve, non-return valve, reflux valve, retention valve or one-way valve is a valve that normally allows fluid to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave.