Drosel hidraulic unidirectional 257-5

In line single-acting control valves

Their function is to control and, if necessary, to shut-off the flow in one direction, allowing a free return flow in the opposite direction. Appreciated for their aesthetic characteristics, they are a reliable solution.

The suitable dimensioning has made possible to obtain, in a little space, a great mechanic resistance of the components.

The spring in high-resistance material is housed in such a way that it does not close as a pack during the opening of
the single-acting conical valve poppet.

Like all the valves of the series FT 257 they ensure:

• metallic seal;
• flow linearity at the opening;
• accurate control for a wide range of flow rate,
thanks to the double reference system
• wide range of the flow rate control;
• impossibility for the needle to leave its seat even in the max.
opening position;
• stable positioning thanks to a dowel inside the knob;
• quickness in the assembling of the panel (the ring nuts (G) are supplied on request).

The check valve is calibrated at 0,5 bar.

On request

• Versions AISI 316 code FT 2257/5
• Viton seals (V)
• NPT threads
• Equipped with ring nuts (G)
• Knob in ABS (mp)
• Lobes aluminium die-cast handwheel (RA)