🔧 D-Type Horizontal Multistage Centrifugal Pump Disassembly Guide
Jun 19, 2025
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Explore the engineering technology behind superior performance! In this video demonstration, you can intuitively see HNYB PUMP's experienced technicians dismantle and assemble a D-type horizontal multistage centrifugal pump.
1. Preparation Before Disassembly
- Disconnect the power supply and close inlet/outlet valves.
- Remove the coupling guard and disconnect the pump from the motor.
- Drain the pump completely to ensure no pressure or liquid remains.
2. Disassembling Bearing Components
- Unscrew the bolts on both bearing housings.
- Remove the bearing covers, bearings, and housings carefully using a puller if needed.
- Record bearing types and their orientation.
3. Disassembling Pump Casing
- Disassemble from the rear to the suction end in the following order:
- Rear cover (diffuser cover).
- Diffusers and intermediate casings.
- Impellers (loosen the impeller nuts and mark their direction).
- Suction casing (first stage casing).
4. Disassembling Shaft Seal Components
- Remove the packing gland, packing ring, and stuffing box.
- Inspect the sealing area of the shaft for wear.
5. Cleaning & Inspection
- Clean all parts and check for the following:
- Shaft for bending or scoring;
- Impellers and diffusers for cracks or scaling;
- Sealing gaskets and rings for aging or damage;
- Bearings for noise or rotation resistance.
6. Notes
- Label and organize all removed parts for easy reassembly.
- Avoid impact or forceful disassembly to protect precision parts.
- Cover or store parts properly after disassembly to avoid contamination or loss.
The D-type horizontal multistage centrifugal pump features a sophisticated internal structure that requires careful and methodical disassembly. Following this guide will help users efficiently and safely disassemble the pump, ensuring all components remain intact, clean, and well-identified for reassembly. As a trusted manufacturer, HNYB PUMP is committed to delivering high-quality pump solutions and technical support to meet the needs of global customers in diverse applications.