The VUC series’ valves are unidirectional valves (or check valves). They allow so the flow pass free to them in a direction while, thanks to the closing of a poppet, the flow is interrupted in the opposite way. The sealing of the valve, once closed, is granted thanks to the perfect contact between the poppet, built with hardened steel and then grinded, and its sealing edge on the body of the valve. Externally, a gasket avoids leakages through the threads. The check valves VUC series are available with the sizes BSPP 1/4” and BSPP 3/8”. Thanks to their compact dimensions, the employment of the check valves VUC is specially recommended in the design of HIC manifolds. The installation into specific housings with female threads allows furthermore to mounting the valves in-line. The protection against the corrosion of the external components is granted thanks to the manganese phosphating treatment.