MODERN STEAM PRACTICE . 354 length of stroke as the air pump . In this case the one acts as the feed pump , and the other , technically termed the “ bilge pump, ” pumps out the water that accumu - … Fig . 230 . — Feed Pump . a , Feed pump , b , Ram for do . C , Pin for taking the air - pump crosshead at one end , and bilge pump at the other end . D , Suction valve . e , Discharge valve . F , Relief valve and spring , g , Air vessel . adopted for quick - going engines , as they would soon be…
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