A pump arrangement for a fuel system for use in an aircraft, the pump arrangement comprising: an actuation pump (142, 322, 422) having an actuation pump outlet having an actuation pump discharge flow at an actuation pump discharge pressure; a pressure regulating valve (166, 366, 466) characterized in that the regulating valve (166, 366, 466) comprises: first (173, 373, 473), second (179, 379, 479) and third ports (182, 382, 484); a regulator valve member (172, 372, 472) selectively adjusting a flow path from the first port (173, 373, 473) to the second port (179, 379, 479); wherein the first port (173, 373, 473) is operably fluidly coupled to the actuation pump outlet such that a first portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a first direction; wherein the third port (182, 382, 484) is operably fluidly coupled to the actuation pump outlet such that a second portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a second direction opposite the first direction; wherein movement of the regulator valve (172, 372, 472) in either of the first or second directions operably adjusts a pressure of the first portion of the actuation pump discharge flow to correspondingly adjust the actuation pump discharge pressure; and in that the pump arrangement further comprises a control valve (168, 268, 368, 468) operably interposed between the actuation pump outlet and the third port (182, 382, 482) selectively adjusting the amount of biasing applied by the second portion of the actuation pump discharge flow. an actuation pump (142, 322, 422) having an actuation pump outlet having an actuation pump discharge flow at an actuation pump discharge pressure; a pressure regulating valve (166, 366, 466) characterized in that the regulating valve (166, 366, 466) comprises: first (173, 373, 473), second (179, 379, 479) and third ports (182, 382, 484); a regulator valve member (172, 372, 472) selectively adjusting a flow path from the first port (173, 373, 473) to the second port (179, 379, 479); wherein the first port (173, 373, 473) is operably fluidly coupled to the actuation pump outlet such that a first portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a first direction; wherein the third port (182, 382, 484) is operably fluidly coupled to the actuation pump outlet such that a second portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a second direction opposite the first direction; wherein movement of the regulator valve (172, 372, 472) in either of the first or second directions operably adjusts a pressure of the first portion of the actuation pump discharge flow to correspondingly adjust the actuation pump discharge pressure; and in that the pump arrangement further comprises a control valve (168, 268, 368, 468) operably interposed between the actuation pump outlet and the third port (182, 382, 482) selectively adjusting the amount of biasing applied by the second portion of the actuation pump discharge flow. first (173, 373, 473), second (179, 379, 479) and third ports (182, 382, 484); a regulator valve member (172, 372, 472) selectively adjusting a flow path from the first port (173, 373, 473) to the second port (179, 379, 479); wherein the first port (173, 373, 473) is operably fluidly coupled to the actuation pump outlet such that a first portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a first direction; wherein the third port (182, 382, 484) is operably fluidly coupled to the actuation pump outlet such that a second portion of the actuation pump discharge flow operably biases the regulator valve member (172, 372, 472) in a second direction opposite the first direction; wherein movement of the regulator valve (172, 372, 472) in either of the first or second directions operably adjusts a pressure of the first portion of the actuation pump discharge flow to correspondingly adjust the actuation pump discharge pressure; and in that the pump arrangement further comprises a control valve (168, 268, 368, 468) operably interposed between the actuation pump outlet and the third port (182, 382, 482) selectively adjusting the amount of biasing applied by the second portion of the actuation pump discharge flow.