Parker Legris offers 4 types of shut-off fittings: polymer and stainless steel non-return valves for pneumatic applications, Liquifit for water and beverage applications, non-return valves and shut-off fittings. Very compact, they allow the fluids to pass in one direction whilst blocking flow in the other direction. They are also designed to block fluid flow in any direction when the pressure differential is very weak. Parker Legris lightweight and robust shut-off fittings are used to safely isolate a circuit without venting the whole installation.