Pressure regulating valve

A pressure regulating valve assembly comprising:

• a pressure regulating valve sleeve comprising a first window set and a second window set;
• and
• a pressure regulating valve spool configured to move bi-directionally along a longitudinal axis of the pressure regulating valve sleeve, the pressure regulating valve spool comprising:
• a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion formed between the first and second cylindrical portions;
• an angled bucket formed on the first cylindrical portion having a high gain portion of a first width, a low gain portion of a second width, and a ratio of the first width to the second width between 1.44 and 1.47;
• and
• an angled outlet surface spanning between the second cylindrical portion and the third cylindrical portion, wherein the angled bucket is configured to align with the first window set and the angled outlet surface is configured to align with the second window set.

A fuel control, comprising:

• a metering valve section configured to meter a fuel burn flow;
• and
• a pressure regulating valve section configured to control a metered pressure of a metering valve section, the pressure regulating valve section including a pressure regulating valve assembly comprising:
• a pressure regulating valve sleeve comprising a first window set and a second window set;
• and
• a pressure regulating valve spool configured to move bi-directionally along a longitudinal axis of the pressure regulating valve sleeve, the pressure regulating valve spool comprising:
• a first cylindrical portion, a second cylindrical portion, and a third cylindrical portion formed between the first and second cylindrical portions;
• an angled bucket formed on the first cylindrical portion having a high gain portion of a first width, a low gain portion of a second width, and a ratio of the first width to the second width between 1.44 and 1.47;
• and
• an angled outlet surface spanning between the second cylindrical portion and the third cylindrical portion, wherein the angled bucket is configured to align with the first window set and the angled outlet surface is configured to align with the second window set.