This document provides technical specifications for the Tognella FT 257/6 series of check valves (piston type). These valves are designed to be inserted in circuit branches where free flow is allowed in one direction while preventing return flow. A conical valve poppet ensures a lasting and hermetic seal, housed with a high-resistance spring that prevents packing during the opening phase.
| Material (Body) | Steel (BobyY 95 MN Ps 23- UNI 5105) |
|---|---|
| Material (Valve) | Steel (GHEGK VALVE 38 Ni GR Mo 4- UNI- EN 10083) |
| Material (Spring) | Steel C72 (UNI 3545) |
The standard calibration has a load pressure of 0.5 bars.
It allows free flow in one direction while preventing return flow in the opposite direction.
The valve is available with calibrations of 0.5, 2, 4, 6, 8, and 10 bars.