A valve comprising: a valve body having an inlet , an outlet , and a fluid path extending between the inlet and the outlet ; the valve further comprises a valve member situated in the fluid path between the inlet and the outlet ; the valve member being selectively movable between a closed position, which closes the fluid path between the inlet and the outlet , and an open position, which opens the fluid path between the inlet and the outlet ; the valve member comprising a first orifice and a second orifice and a main conduit extending between the first orifice and the second orifice ; the valve member further comprising a bypass conduit (10a, 10b; 15a, 15b) in fluid communication with the main conduit ; the bypass conduit (10a, 10b; 15a, 15b) comprising a first portion (10a; 15a) with a first cross-section area and a second portion (10b; 15b) with a second cross-section area that is different from the first cross-section area, the first portion (10a; 15a) being in fluid communication with the second portion (10b; 15b); wherein the valve body comprises a compensation chamber ; wherein the compensation chamber comprises a compensation orifice ; wherein the bypass conduit (10a, 10b; 15a, 15b) comprises an outer bypass orifice (11a; 18a) defined by and disposed on the outer surface of the valve member ; wherein the valve member comprises an internal orifice (11b; 18b) situated between the bypass conduit (10a, 10b; 15a, 15b) and the main conduit ; and characterized in that , in the closed position, the inlet is in fluid communication with the compensation chamber via the outer bypass orifice (11a; 18a), via the bypass conduit (10a, 10b; 15a, 15b), via the internal orifice (11b; 18b) of the valve member , via the main conduit , via the first orifice , and via the compensation orifice . a valve body having an inlet , an outlet , and a fluid path extending between the inlet and the outlet ; the valve further comprises a valve member situated in the fluid path between the inlet and the outlet ; the valve member being selectively movable between a closed position, which closes the fluid path between the inlet and the outlet , and an open position, which opens the fluid path between the inlet and the outlet ; the valve member comprising a first orifice and a second orifice and a main conduit extending between the first orifice and the second orifice ; the valve member further comprising a bypass conduit (10a, 10b; 15a, 15b) in fluid communication with the main conduit ; the bypass conduit (10a, 10b; 15a, 15b) comprising a first portion (10a; 15a) with a first cross-section area and a second portion (10b; 15b) with a second cross-section area that is different from the first cross-section area, the first portion (10a; 15a) being in fluid communication with the second portion (10b; 15b); wherein the valve body comprises a compensation chamber ; wherein the compensation chamber comprises a compensation orifice ; wherein the bypass conduit (10a, 10b; 15a, 15b) comprises an outer bypass orifice (11a; 18a) defined by and disposed on the outer surface of the valve member ; wherein the valve member comprises an internal orifice (11b; 18b) situated between the bypass conduit (10a, 10b; 15a, 15b) and the main conduit ; and characterized in that , in the closed position, the inlet is in fluid communication with the compensation chamber via the outer bypass orifice (11a; 18a), via the bypass conduit (10a, 10b; 15a, 15b), via the internal orifice (11b; 18b) of the valve member , via the main conduit , via the first orifice , and via the compensation orifice . <EOS>