Multi-function fluid control valve

An aircraft fluid control valve, comprising:

• a sleeve that extends axially between a base end and a cap end, the sleeve including a first inner chamber and a second inner chamber, and the sleeve is enclosed at the base end, and the first inner chamber is defined by a first sleeve wall and the second inner chamber is defined by a second sleeve wall, wherein the first inner chamber extends from the base end to the second inner chamber, and the second inner chamber extends from the cap end to the first inner chamber, and a fluid inlet port and a fluid outlet port are disposed in the first sleeve wall, and a high pressure reference port is in fluid communication with the base end and a low pressure reference port is in communication adjacent the cap end;
• a cap in communication with the cap end of the sleeve;
• a first piston having a center post, a base flange, and a piston head, wherein the center post extends axially between the base flange and a distal end, and the piston head is attached to the center post at an axial position between the base flange and the distal end, the piston head (PH) including a PH base flange and a PH side wall, the PH base flange extends outwardly from the center post and the PH side wall extends axially from the PH base flange to a PH side wall distal end;
• a second piston (SP) having a SP center flange and a SP side wall, wherein the SP side wall extends axially between a SP side wall base end and a SP side wall cap end;
• a first spring disposed between the SP center flange and the cap;
• and
• a second spring disposed between the PH base flange and the SP center flange.