A scroll compressor (50, 100, 200, 700), comprising: a compressor housing (66, 102, 202, 702) having a plurality of portions including an upper housing portion (66A, 102A, 202A, 702A) and a lower housing portion (66C, 102C, 202B, 702B); an orbiting scroll member disposed within the compressor housing; wherein a non-orbiting scroll member (62, 110, 710) disposed within the compressor housing, wherein the orbiting scroll member and the non-orbiting scroll member are intermeshed thereby forming a compression chamber (60, 140) within the compressor housing, the non-orbiting scroll including one or more compression inlet ports (56, 58, 126, 128, 226, 228, 726, 728); an economizer injection inlet (52, 122, 222, 722) formed through the compressor housing and in fluid communication with the compression chamber via each of the one or more compression inlet ports; and a discharge outlet (64, 106) in fluid communication with the compression chamber, wherein the economizer injection inlet is formed through the upper housing portion, and the discharge outlet is formed through the upper housing portion; characterized in that an intermediate pressure chamber (54, 124, 724) is formed in the compressor housing between the non-orbiting scroll member and the compressor housing, the intermediate pressure chamber being fluidly connected to the economizer injection inlet and the one or more compression inlet ports; and a seal (68, 70, 130, 132, 232) is disposed between the upper housing portion of the compressor housing and the non-orbiting scroll member and configured to isolate the intermediate pressure chamber from the discharge outlet. a compressor housing (66, 102, 202, 702) having a plurality of portions including an upper housing portion (66A, 102A, 202A, 702A) and a lower housing portion (66C, 102C, 202B, 702B); an orbiting scroll member disposed within the compressor housing; wherein a non-orbiting scroll member (62, 110, 710) disposed within the compressor housing, wherein the orbiting scroll member and the non-orbiting scroll member are intermeshed thereby forming a compression chamber (60, 140) within the compressor housing, the non-orbiting scroll including one or more compression inlet ports (56, 58, 126, 128, 226, 228, 726, 728); an economizer injection inlet (52, 122, 222, 722) formed through the compressor housing and in fluid communication with the compression chamber via each of the one or more compression inlet ports; and a discharge outlet (64, 106) in fluid communication with the compression chamber, wherein the economizer injection inlet is formed through the upper housing portion, and the discharge outlet is formed through the upper housing portion; characterized in that an intermediate pressure chamber (54, 124, 724) is formed in the compressor housing between the non-orbiting scroll member and the compressor housing, the intermediate pressure chamber being fluidly connected to the economizer injection inlet and the one or more compression inlet ports; and a seal (68, 70, 130, 132, 232) is disposed between the upper housing portion of the compressor housing and the non-orbiting scroll member and configured to isolate the intermediate pressure chamber from the discharge outlet.