Pneumatech offers a Standard (S) range and a High Efficiency (HE) range of compressed air filters to best meet your process needs. Both filter ranges offer similar benefits such as: - Maximum contanimant removal - Energy savings - Increased reliability - Easy maintenance The HE range is engineered for minimal pressure drops and offers significant energy savings over time. Pneumatech filters are available in a number of grades (P, G, C, S, D & V) and sizes.