BUCHER SNSA-B Counterbalance Valve

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BUCHER SNSA-B Counterbalance Valve Details

Product Name: BUCHER SNSA-B Counterbalance Valve
Brand: BUCHER
Keywords: BUCHER, SNSA-B, BUCHER SNSA-B, , BUCHER , SNSA-B , BUCHER SNSA-B , Counterbalance, BUCHER Counterbalance

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Description Counterbalance valves prevent actuator “runaway” in the event of negative loads. The flow leaving the actuator (the A line in the example) is piloted and controlled by the flow entering the actuator (the B line), ensuring a cavitation-free lowering of the load, as long as the valve pressure setting is not exceeded (see application example). A counterbal ance valve must be capable of holding the load without leak age. The design of this valve is based on a pilot assisted pressure relief valve (see pressure settings). The pressure in the actuator inlet line causes the relief valve in the actua tor outlet line to open. The level of pilot pressure which is re quired is determined by the valve's pilot area ratio and by the pressure generated by the load itselfs (see pressure set tings). To ensure a reliable secondary relief function (e.g. for ther mal expansion) the related directional valve must have a centre condition in which ports A and B are connected to Tank T (spool type function G).