htm hydraulics Products

Our Products - Tognella Flow Valves

FT 257/2

DOUBLE-ACTING SHUT-OFF

They allow flow control in both directions.
They are equipped with a needle so to obtain:
• metallic seal;
• flow linearity at the opening;
• accurate control for a wide range of flow rate.
A double reference system made up of a decimal scale on the handle and of a keyed metal ring with graduated fractional scale and divided into sectors allows the identification of flow conditions.
A locking screw in the handle ensures stable flow values preventing
accidental adjustments or movements due to vibrations. A ring nut (G) is used to carry out the panel mounting, on request.
Features:
• Sizes from 1/8 " to 2 " BSP
• On request NPT threads available.
• Working Pressure 400 Bar.
• Body Material Stainless Steel & Steel


Download Catalogue

FT 257/5

IN LINE SINGLE-ACTING CONTROL VALVES


Their function is to control and, if necessary, to shut-off the flow in one direc-tion, 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.
• Sizes from 1/8 " to 2 " BSP
• On request NPT threads available.
• Working Pressure 400 Bar.
• Body Material Stainless Steel & Steel.
Download Catalogue

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