CZJ‑CZK Series Standard Back‑Pull‑Out Centrifugal Pump for Chemical & Petrochemical Industry

The motor drives the pump shaft through the coupling, rotating the impeller at high speed. Liquid enters axially and is accelerated by the impeller to gain kinetic and pressure energy, then collected and pressurized by the volute before discharge. The back-pull-out modular design allows the entire rotor unit (bearing frame, shaft, seal housing and impeller) to be withdrawn toward the motor side by releasing the separable extended coupling, while the casing, inlet/outlet flanges and piping remain in place for easy on-site maintenance of mechanical seals, impeller and bearings.

• ISO 5199 international standard: dimensions, mechanical strength, bearing life and hydraulic performance comply with DIN 24256 / ISO 5199, interchangeable with international equivalent process pumps.
• Modular withdrawable rotor unit: integrated bearing frame, shaft, seal housing and impeller; components interchangeable across sizes to reduce spare parts variety and inventory.
• Back pull-out no-pipe-dismantling maintenance: release the separable coupling and withdraw the rotor module without removing casing, piping or motor, shortening downtime.
• Multiple sealing configurations: single/double mechanical seal or packing seal, matching Plan 11 / Plan 32 / Plan 54 flush plans for toxic, volatile and high-temperature media.
• Flexible wetted materials: cast iron, 304, 316L stainless steel and duplex stainless steel for weak acid, weak alkali, solvent and salt solution service.
• Closed high-efficiency impeller with optimized hydraulic model and excellent anti-cavitation performance for long continuous industrial operation.
• Oil bath lubricated bearing, optional water-cooled bearing frame for high-temperature continuous service.

• Chemical & petrochemical: acid/alkali/salt solutions, organic solvents, chemical intermediates transfer.
• Pharmaceutical: pharmaceutical intermediates and clean process fluid transfer.
• New energy lithium battery: salt solutions and precursor process circulation.
• Environmental water treatment: wastewater, chemicals and desalination systems.
• Food & light industry: sugar refining and fermentation process media.
• Power plants & metallurgy: process water and cooling circulation systems.