... motor saver, gas-liquid separator, multi stages centrifugal pump, check valve, relief valve, coil lead, cable protector, submersible cable, tubing. Surface ... saver above the electrical motor to balance inner & outer pressure, also to lubricate & cool the motor. 2-2- ... Accumulative fluid volume, CBM production rate, Valve(on production line) position, Balance valve position. 2-3-7. Can Supply ...