152 Overall dimensions and technical information are provided solely for informative purposes and may be modified without notice Function fittings Series TECNOFUN Pneumatic fittings Valves and function fittings TYPE A Connection A - see connections list B Connection B - see connections list SEE CONNECTIONS LIST 00 = None D4 = Straight Ø4 D6 = Straight Ø6 D8 = Straight Ø8 L1 = Female banjo G1/8” G4 = Rotating banjo Ø4 G6 = Rotating banjo Ø6 G8 = Rotating banjo Ø8 M1 = G1/8” male M2 = G1/4” male F1 = G1/8” female 551.281A.B.XX 90° progressive start-up valve ART. Technical characteristics • The soft start valve is a device designed to gradually pressurise the downstream circuit until 50% of the upstream pressure value is reached. • Once the 50% of the upstream pressure value is reached in the down stream circuit the valve fully opens allowing full air passage. • The filling time can be adjusted thanks to the built in flow regulator. • This device is used in order to ensure that during the pneumatic circuit start up the cylinders will return to theirs home position slowly avoiding collisions or sudden movements. Technical characteristics • Fluid: Filtered and lubricated air or non • Working ports size: see connections list • Opening pressure (Pa): 50% of the inlet pressure (Pi) • Flow rate at 6 bar with free exhaust (Nl/min) from 1 to 2 with opening ciruit: 350 Nl/min • Flow rate at 6 bar with ∆p=1 from 1 to 2 with opening ciruit: 600 Nl/min • Flow rate at 6 bar with ∆p=1 from 2 to 1 with opening pin: 650 Nl/min • Temperature: -5 °C ... + 50 °C • Weight: 31 g Pneumatic symbols Note Example: 551.281.M1.D4.XX 90° progressive start-up valve. Connections “A” Male G1/8”, “B” Tube Ø4. For the dimension including cartridges see page Accessories - Function fittings ART. Time (s) Pressure (bar) Curve without device Curve with device Piloting curves Adjustment curve rpm Flow rate Q (Nl/min.) B A 47.6 1.8 30 18.5 18 3.2 25 13.5 15
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