Environmentally safe pump including seal

摘要

A motor driven environmentally safe pump includes a sealed motor housing (22) sealingly affixed to a sealed pump housing. The pump housing defines a fluid pumping chamber (43) in which is a fluid pumping impeller (46). A triplex rotating seal (31) is disposed rearward of impeller (46) within an annular fluid chamber (87) so as to prevent the fluid being pumped via the impeller (46) from leaking along the shaft (23) toward the motor (21). A piston seal (32) is provided adjacent a second fluid chamber (204), the piston seal also for preventing fluid from leaking into the motor housing and damaging the motor.