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Our Products - Tognella - Check Valves

FT257/6

CHECK VALVES (PISTON)

They are inserted in branches of the circuit where the free flowin one direction is allowed and the return flow in the opposite direction is not possible. A lasting and hermetic seal is ensured by the conical valve poppet, which is a reliable mechanical solution. The spring in high-resistance material is housed in such a way that it does not close as a pack during the opening phase. The external configuration of the body makes it easy to seize the piece during the assembling. They are available with different calibrations of the load pressure (0,5 standard and 2-4-6-8-10 bars).

Features
:
• Max.working pressure upto 400 bar.
• Sizes from 1/8"BSP to 2 " BSP available.
• Working temperature from -20 Deg.C / + 100 Deg.C
• Body material in steel & stainless steel.
• Minimum Opening pressure 0.5 Bar.Download Catalogue

FT 260/6

IN LINE SINGLE-ACTING VALVES (BALL)


They are inserted in branches of the circuit where the free flow in one direction is allowed and the return flow in the opposite direction is not possible. The single-acting valves (in line) are of ball type with alignment guide made of composite high resistance material which allows a total passage and a great breaking strength and wear resistance. All this has been confirmed by numerous tests. They are available with two different calibrations of the opening pressure (0,35 standard e 4.5 bar).
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FT 257/7

SINGLE PILOT CHECK VALVES

Belonging to the same range of the in line single-acting valves, but different in that they allow the valve to open in the direction that is normally closed thanks to a particular signal of pilot operated pressure. The high level of pilot ratio, realized in the design phase, enables rapid and complete opening for the whole duration of the desired cycle. The construction material used for the seal pistons, the hardened treatment that these are subjected to, as well as the finish-grinding guarantee a perfect seal even in particularly adverse working conditions.

Features
:
• Max.working pressure upto 400 bar.
• Sizes from 1/4"BSP to 1 " BSP available.
• Working temperature from -20 Deg.C / + 100 Deg.C
• Body material in steel & stainless steel.
• Minimum Opening pressure 0.5 Bar.

Uses:
The above mentioned valves are generally used for blocking work circuits under pressure, such as guarding against falling loads in the event of pipe braking or against reeping movements for hydraulically blocks systems. Download Catalogue

FT 257/8

DOUBLE PILOT CHECK VALVES

Belonging to the same range of the in line single-acting valves, but different in that they allow the valve to open in the direction that is normally allowed thanks to a particular signal of pilot operated pressure. The high level of pilot ratio, realized in the design phase, enables rapid and complete opening for the whole duration of the desired cycle. The construction material used for the seal pistons, the hardened treatment that these are subjected to, as well as the finish-grinding guarantee a perfect seal even in particularly adverse working conditions.

Features
:
• Max.working pressure upto 400 bar.
• Sizes from 14"BSP to 2 " BSP available.
• Working temperature from -20 Deg.C / + 100 Deg.C
• Body material in steel & stainless steel.
• Minimum Opening pressure 0.5 Bar.

Uses:
The above mentioned valves are generally used for blocking work circuits under pressure, such as guarding against falling loads in the event of pipe braking or against creeping movements for hydraulically blocks systems. Download Catalogue

FT 257/9

SINGLE PILOT CHECK VALVES

Belonging to the same range as the in-line check valves, but different in that they allow the valve to open in the direction that is normally allowed. The high level of pilot ratio, realized in the design phase, enables rapid and complete opening for the whole duration of the desired cycle. The construction material used for the seal pistons, the hardened treatment that these are subjected to, as well as the finish-grinding guarantee a perfect seal even in particularly adverse working conditions.

Features:
• Max.working pressure upto 400 bar.
• Sizes from 1/4"BSP to 2 " BSP available.
• Working temperature from -20 Deg.C / + 100 Deg.C
• Body material in steel only
• Minimum Opening pressure 0.5 Bar.
Uses
The above mentioned valves are generally used for blocking work circuits under pressure, such as guarding against falling loads in the event of pipe braking or against creeping movements for hydraulically blocks systems.
Bi-directional loading valve with INTERPASS(TM) burst disc protection fitted as standard.
Download Catalogue

 

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