Check Valves are used to prevent the back flow of fluids and gases in nearly every industry. GVC Direct's Low Pressure Check Valves are an excellent choice for all high-purity, corrosive, and critical fluids and gasses. The valve includes an O-Ring Seat to provide leak tight-shut-off and a back-stopped poppet design to prevent spring over travel. Check Valves are available with a wide range of crack pressures from 1/3 psi to 50 psi and with a wide choice of Cv from 0.1 to 4.8. A wide variety of Imperial and Metric end connections are available. Be sure to contact us for any custom valve requirements or accessories.