Submersible pump for pumping radioactive liquids

摘要

PCT No. PCT/GB94/00208 Sec. 371 Date Nov. 16, 1994 Sec. 102(e) Date Nov. 16, 1994 PCT Filed Feb. 4, 1994 PCT Pub. No. WO94/18457 PCT Pub. Date Aug. 18, 1994A submersible pump for pumping radioactive liquids comprises a pump cartridge (2) which is removably mounted in a cavity (3) formed in the pump body (1). Seals (30a, 30b) are provided between the cartridge (2) and the cavity (3). The cartridge houses a pneumatically operated motor to drive an impeller which discharges liquid through an outlet duct (10). Compressed air required for driving the motor is supplied through an air inlet tube (12) and air exhausted from the motor is conveyed through an air outlet tube (14). Both the air inlet and the air outlet tubes extend through the interior of the outlet duct (10).