Fifty years under pressure. P1 V1 D1 C1 P1 · Fixed displacement pump V1 · Pressure relief valve D1 · 4/3 directional valve, closed centre C1 · Double-acting cylinder Diagram 001 — Double-acting cylinder control F P1 V1 D1 VB C1 P1 · Fixed displacement pump V1 · Pressure relief valve D1 · 4/3 directional valve, closed centre VB · Pilot-operated check valve: opens with pressure in B C1 · Double-acting cylinder with load F on the rod Diagram 007 — Pilot-operated check valve P1 V1 D1 C1 P1 · Fixed displacement pump V1 · Pressure relief valve D1 · 4/3 directional valve with regenerative position (B connected to P) C1 · Double-acting cylinder Diagram 009 — Regenerative circuit P1 PG R1 Q p pc P1 · Variable displacement pump with pressure compensator PG · Pressure gauge R1 · Adjustable throttle (the load) p–Q curve: full flow up to the setting pressure pc, then displacement is reduced Diagram 011 — Variable displacement pump with pressure compensator ASG LAB designs, assembles and supplies hydraulic systems for industry: power units, cylinders, valves, hose assemblies. A craft we have been carrying on since 1975.
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