Patent ID: 8646338

Claim:
A hydraulic section ( 1 ) for use in a hydraulic distributor ( 10 ), comprising: a main spool ( 2 ) longitudinally displaceable within said hydraulic section ( 1 ) in order to selectively transmit pressurised hydraulic fluid coming from a feed line (Pal) of a pump ( 100 ) to workports (A,B) through a metering orifice ( 3 ); pressure compensation means ( 16 ) situated downstream of said main spool ( 2 ) and able to maintain a substantially constant pressure drop through said metering orifice ( 3 ), said pressure compensation means ( 16 ) comprising a pressure compensator ( 40 ; 4 ) housed in a bore ( 9 ) formed within the hydraulic section ( 1 ); a first chamber ( 7 ) interposed between said main spool ( 2 ) and a first end ( 16 a ) of said compensation means ( 16 ); a second chamber ( 6 ) situated at a second end ( 16 b ), opposite said first end ( 16 a ) of said compensation means ( 16 ), characterised in that said second chamber ( 6 ) is connectable to the feed line (Pal) by means of a predefined channel (Pp) so that said hydraulic section ( 1 ) operates as a priority section, and it is connectable to a line (LS) for detecting the highest charge pressure so that said hydraulic section ( 1 ) operates as a flow-sharing section, wherein a plug ( 110 ; 11 ) is provided to close said bore ( 9 ), in case the hydraulic section ( 1 ) operates as a flow-sharing section the plug ( 110 ) interfacing with the walls of the bore ( 9 ) thus forming the second chamber ( 6 ) and a portion of said plug ( 110 ) covering the predefined channel (Pp) thus excluding the communication between the predefined channel (Pp) and the second chamber ( 6 ), in case the hydraulic section ( 1 ) operates as a priority section the plug ( 11 ) interfacing with a piston ( 5 ) housed within the bore ( 9 ) thus forming the second chamber ( 6 ) so that a passage is provided between the plug ( 11 ) and the piston ( 5 ) that allows the communication between the predefined channel (Pp) and the second chamber ( 6 ).