These 2-way flow valves (drop rate braking valves), type SB or SQ, are used for flow control purposes with single acting cylinders. They maintain a constant drop rate irrespective of the size of the load. There is an integrated sliding metering orifice enabling free flow in the other direction. Type SB features load sensing to prevent oscillations (e.g. required with fork lift trucks) whereas type SQ has load independent characteristics. Flow control valves type SJ (no sliding metering orifice) are used to limit control flows in consumer circuits. Version DSJ limits the flow both directions and is therefore intended for double acting consumers applications.