424 MODERN STEAM PRACTICE . falls into the pump chamber by gravitation ; tbe head valves are placed at the side and above the line of foot valves , with a hot well … which the air is forced into the dis - Fig . 308 . — Air Pumps with Condenser at centre 1 _ 1 j rpt - 1 , fitted with inverted Foot Valves and Dis - Charge pipe overboard . The exhaust charge Ch amb = rs at side , all in one Casting . pipe is of a large diameter , suited for a , Condenser . B , Hot…
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