Compact close coupled design. Standard NEMA 56C motors. Semi-open high efficiency impeller design on all models. Mechanical Seal: AI, BF, AB: 5/8" Type 6A Buna, carbon vs. ceramic. Mechanical Seal: SS: 5/8" Type 21 Viton, carbon vs. ceramic. Flourocarbon Type 21 and PTFE Type 9 single seals optional. Other seal faces and elastomers available. Double Type 21 Flourocarbon, neoprene or EPR seals optional. Seal flush and seal quench optional. Optional Power Frame available.