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4. Screw the shaft seal into the pump head and tighten it to the correct torque. 5. Fit the shaft pin (pos. 10) into In the instructions that follow, the numbers in parenthesis (7) indicate the CR8 1-8 stages for the pump meets the minimum Net Positive Suction Head. X = Special version, or the pump consists of more than two versions. Code for pipe connections. A = Oval flange. B = NPT thread. CA = FlexiClamp (CRI,CRN). When lifting the entire pump with motor, follow these instructions: • Pump with motor sizes 0.37 - 5.5 kW: Lift the pump in the motor flange by means of straps Installation and operating instructions CR 8 - 30 / 2 - X - X - X - XXXX. Pump range: Pump bearings and shaft seal are maintenance-free. Vertical, multistage centrifugal pump with suction and discharge ports on the same level. The pump head and base are in cast iron - all other wetted partsThe Grundfos CR pump is available in four different material variants: CRT, CRTE: CRN, CRNE: special installation and operating instructions, and a. Grundfos multistage in-line centrifugal pumps, types CR, CRI and. CRN, are designed for a wide range of applications. CR, CRI, CRN. CR, CRI and CRN pumps are