thereby increasing the reliability of the upper and lower metal seats 48 50 as well as increasing the amount of pressure that the seals 48 50 can withstand in addition in some embodiments the sealing surfaces of the upper and lower metal seals 48 50 may be coated with a seal coating additional elastomer seals 64 are provided as backup seals to the upper and lower metal seals 48 50 and also to seal the interfaces between the stem seal ring 59 the valve body 28 and the tubing hanger 18 these elastomeric seals can also serve to seal off area 40 above the seals a seal spacer 66 having openings 68 is provided between the upper and lower metal seats 48 50 upper and lower ends 70 72 of the seal spacer 66 extend into the area 60 62 between the first and second metal seal legs of each seal 48 50 and contact the seals 48 50 the seal spacer 66 is not an energizing member but rather serves to maintain the relative axial positions of the upper and lower metal seals 48 50 relative to one another thereby preventing the seals 48 50 from moving toward one another and blocking the annular access port 32 the openings 68 in the seal spacer 66 allows the annular fluid to pass through the seal spacer 66 and into the valve.