Application: Single- or double-acting cylinders. Actuation: Lever operated, detent positioned. Functions: The 9500 provides “advance”, “hold” and “return”. The 9511 (open center) valve can be used if holding is not a requirement, as when running two separate hydraulic tools.Provides “advance” and “return” only. Used on these pumps: P460, PA17, PA46, PA55, PE17, PE21, PE30, PE46, PE55, PE84, PE90, PE120, PE200, PE400, PG30, PG55, PG120, PG400, PQ60 and PQ120 series.