The Brass Spring Check Valves are non-return valves designed for industrial plumbing and fixtures. Made of brass, these valves are durable and resistant to rust and corrosion. With sizes ranging from 1/2" to 4" , they are suitable for use with water, oil, and gas. The maximum working pressure is 1.6MPA, and the valves are designed to be flexible and smell-proof, making them ideal for various applications. Made in China, these check valves feature a matte finish and can handle a maximum water temperature of 120°.