148 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 551.13T.A.B.XX Blocking valve ART. Technical characteristics • The blocking valve function is to maintain the circuit downstream pressure in the event of loss of supply pressure. It is normally fitted directly onto the cylinder connections ports in order to ensure that, in case of accidental loss of the supply pressure, the units positions is maintained. This is achieved as the blocking valve preserves the pressure inside the pressurised chamber. Blocking valves can be unidirectional or bidirectional. • In the unidirectional version the air flow is free in one direction while in order to allow the flow in the opposite direction is necessary to send a pneumatic signal to the unit connection 12. • The bidirectional version requires a pneumatic signal on connection 12 to allow the flow in any of the two directions. • On DIN rail using the relevant adaptor kit (see accessories). • With 90° bracket (see accessories). • Directly on the support plate thanks to two through holes on the body. Technical characteristics • Fluid: Filtered and lubricated air or non • Working ports size: see connections list • Working pressure: 0,5 ... 10 bar • Temperature: -5 °C ... + 50 °C • Weight: 26 g • Flow rate at 6 bar with Δp=1 (Nl/min): 285 Nl/min • Flow rate at 6 bar with free exhaust: 450 Nl/min Pneumatic symbols TYPE T 1 = Unidirectional 2 = Bidirectional 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 Piloting curves Supply pressure (bar) Piloting pressure (bar) Note: Example: 551.131.D4.D4.XX In line blocking valve, unidirectional. Connections “A” and “B” Tube Ø4. For the dimension including cartridges see page Accessories - Function fittings 30 18.5 18 39 14 M5 3.2 15 25 A B
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