1. OPEN Valve fully open. Seatings slips are protected from flow path
	2. ROTATING Plug is rotating. There is no contact between body and seating slips.
	3. EXPANDING Plug/slips have rotated 90°, plug starts expanding slips. Slips only move perpendicular to body seats. Plug/slip assembly is kept centered in body by top and bottom bushings.
	4. DOUBLE BLOCK & BLEED Valve seated. Resilient seals have been compressed. Resilient seals cannot be damaged by operator over-torque. Double block and bleed function can be tested by opening the bleed valve.
	5. START TO OPEN Valve starts opening. Plug moving up, retracting slips from the body seats. Strong dovetail and stems retract the slips. Plug is kept centered in body by top and bottom bushings.
	6. SLIPS RETRACTED Slips have been retracted prior to rotation. (Further working as fig. 1 and 2 in reversed order)