An inlet valve arrangement (20) of a fuel pump (10) comprising a valve member (22) having a stem (26) and a head (28) wherein, a spring (32) compressed between a lower seat (34) defined on the pump body and, a seat member (38) fixed to said stem. The spring seat member (38) has a disc-like base (40) and, a skirt member (42) defining a spring chamber (46) wherein said spring is arranged, said skirt member (32) axially extending to a distant annular end (44) cooperating with an annular face (50) of the pump body surrounding the lower seat (34).
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