Pressure regulator with reconfigurable hydraulic dampening

A pressure regulator, comprising:

• a body comprising a regulated fluid volume, at least one vent passage and fluid supply passage, a dampening piston bore and one regulated fluid volume outlet passage;
• a regulated fluid pressure piston, said piston having a first surface exposed to the regulated fluid volume, and a second surface exposed outwardly of the body;
• an external biasing member contactable with the second surface of the piston and providing a force on the piston directed inwardly of the body;
• a gate connected to the piston and having a first seal and a second seal;
• a dampening piston disposed in the dampening piston bore and an annular gap therebetween, the dampening piston disposed between a dampening volume and the regulated fluid volume;
• an orifice disposed between the dampening volume and the regulated fluid volume, the orifice having a cross sectional area for fluid communication between the dampening volume and the regulated fluid volume, the cross sectional area of the orifice being less than the cross sectional area of the annular gap between dampening piston disposed in the dampening piston bore.