English: Kempton Park Pumping Station. Although better known for the two enormous reciprocating steam engine pumps 320838, the site also possesses two much smaller steam turbine driven pumping sets. These are of the same capacity but physically smaller and also had a higher steam consumption. Small turbines are relatively less efficient because of relatively larger blade tip clearance losses. These are impulse turbines (the first two stages are a velocity compounded Curtis wheel, followed by stages of reaction blading) reduction geared to centrifugal pumps. The square ended green box-like structure is the surface condenser while the vertical cylinder nearer the photographer is the steam jet air extraction and intercooler assembly.