Product Name: Single Disc Swing Check Valves Lead Free Brass Non-Return Valves Model NO.: H14W-16T Application: Household Usage Standard: GB Flow Direction: Unidirection Sealing Form: Gland Packings Globe Valve Pressure: Ordinary Pressure Connection Form: Thread Material: Brass Temperature: Ordinary Temperature Media: Water Trademark: yomtey Transport Package: Wooden Package Specification: DN15-100 Origin: China HS Code: 84818040 Product Description YomteY provides lead-free check valves as your request.CHECK VALVESOVERVIEW: Check valves open with the forward flow, and automatically return to close against reverse flow. The main function is to protect mechanical equipment, most notably pumps, where backflow can damage the internal components. Check valves may be grouped according to the way the closure member moves onto the seat.There are many types of check valves in use today. Some of the more popular types include ball; dual plate or double-door; spring-assisted in-line or nozzle or silent; piston or lift; and swing checks. As with other types of valves, specialty check valves can be found for special applications. While no one type of valve is good for all applications, each has its advantages. Take time to contact the manufacturer to assist in the selection of the best check valve, especially if you are incurring problems with whatever type of check valve that is currently installed.