Skip to main content

FT 257/8

In line double-pilot check valves available from 1/4" to 1/2" bsp, Max.working pressure 400 Bar, oil flow rate up to 140 Lt./min. (depending on the size)

In line
Pilot control
Carbon steel
In line carbon steel double-pilot check valves

Product code composition

Choose the different options below to configure the most useful product code for your needs.

The code will be generated and sent automatically by clicking on "Submit a request".

FT 257/8
Calibration (BAR)

2
4
4,5
6
8
10
* 0,5 (standard)
** 0,35 (standard)
*** 2 (standard)

Thread

* BSPP (standard)
** Metric threads (standard)
*** No thread (standard)
NTP
UNF

Gasket

* NBR (standard)
** No gasket (standard)
*** HPU (standard)
V (FPM)

Versione Speciale
Submit a request

The request can be sent only upon completion of all the choice fields


Technical information

Belonging to the same range of the in line single-acting valves, except that, thanks to a specific signal of pilot operated pressure, they allow the valve to open in the usually flow direction. 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 undergone, as well as the finish-grinding guarantee a perfect seal even in particularly heavy working conditions. Applications: The above mentioned valves are generally used for blocking work circuits under pressure, such as security against falling loads in the event of pipe braking or against undesired movements of hydraulicaly locked loads.