DÜCHTING PUMPEN industrial pumps and spare parts

Identify the installed pump and its parts

Start with a clear nameplate photograph showing DÜCHTING PUMPEN, the complete pump designation, serial number and execution. Add an overall photograph with the suction and discharge connections, drive and mounting arrangement.

For a removed component, include its marking and views of the mating surfaces.

Identify each requested item by its position on the assembly drawing and its description in the parts list. Distinguish an individual component, a service set, a rotating assembly and a complete pump. For several installed pumps, keep the serial number beside every corresponding enquiry line.

Earlier specifications and maintenance drawings help establish the installed version.

Define the operating point and the liquid

Provide the required flow and head, suction pressure, temperature, density and chemical composition. State the units explicitly. If the system has several operating modes, attach a table describing continuous duty, start-up, standby operation and changing tank levels.

Include an existing pump curve and relevant instrument readings where available.

For a slurry, describe the solids material, concentration, particle-size distribution and largest particles. Add information about entrained gas and corrosive constituents. These requirements help assess the hydraulic design and wetted materials.

Record the impeller execution, speed and stage count of an existing machine alongside its operating data. A duty point belongs to that particular pump configuration.

Choose SICcast or a metallic configuration

MC and MCC provide SICcast hydraulic components for abrasive and corrosive liquid duties. WR and WRX use metallic construction with different wear-related arrangements. Describe the actual liquid and solids before selecting a family.

If replacing an installed unit, include the current materials specification and photographs of the areas affected by wear.

For a parts enquiry, list the casing, impeller, wear plate and seal as separate items. Include the relevant drawing positions and supply scope. An existing materials list helps preserve the execution across an assembly.

For a new installation, submit the process requirements together with the required flow and head so the equipment and material enquiry can be assessed as a whole.

Plan the vertical or submersible installation

For MCS and WRS, show the tank layout, minimum and maximum liquid levels, mounting depth and discharge line. Include the electrical supply and installed cable arrangement.

For MCV and WRV, add support dimensions, immersed length, shaft arrangement and the space available above the pump for maintenance.

Photographs should show the mounting structure and nearby equipment as well as the pump. For a new project, explain how the pump or its rotating assembly will be lifted and removed.

For replacement parts, identify shafts, sleeves, bearings, impellers and other components separately against the installed drawing. Combine the dimensional information with the liquid properties and duty point when requesting a complete pump.

Specify the multistage arrangement

For HPH, HPE, HPXL, HPXU or HPXM, provide the stage count, speed, flange arrangement and complete designation. Identify intermediate casings, impellers, diffusers and balancing components by their drawing positions. Show any intermediate discharge and explain which process or line it supplies.

The axial balancing arrangement differs between the families. HPH can use a disc or drum, HPXL balances individual impellers, and HPXU or HPXM uses a balancing device with wear indication. For replacement components, supply documentation of the installed arrangement.

For mine drainage, add water levels and line requirements; for process feed, describe the downstream equipment and its required operating pressure.

Define seals and the maintenance scope

For a mechanical seal, give its full designation, face and secondary-seal materials and dimensions from the equipment documentation. Include the auxiliary liquid or seal-system diagram where applicable. For a cartridge assembly, identify which components belong to the required supply set.

For shafts, sleeves or bearing assemblies, attach drawings showing fits, threads, keys and mating components. Describe damage and include relevant measurements. A maintenance set should list each component and quantity, including any specified fasteners or secondary seals.

This gives the quotation a clear boundary between one replacement part and an assembly prepared for installation. Retain drawing positions in the enquiry and attachment names.

Set the boundary of equipment supply

For a new project, submit the technical specification, process purpose and operating-point requirements. Include the liquid properties, operating modes, available space and drive requirements.

State whether the enquiry concerns a pump, a pump with motor or an agreed package of components for the complete unit.

For a replacement machine, attach its passport, installation drawing and pipework layout. Include the shaft centreline, flange positions, base dimensions and coupling details. If maintenance access is restricted, show the removal route and available lifting space.

List the required technical documents, their language and acceptance requirements. These details allow the offer to describe both the equipment configuration and the project interfaces.

Prepare an enquiry that can be compared

Use one enquiry line for each pump or spare-part position. Record the complete designation, source-machine serial number, part number or drawing position, quantity and unit. For a set, attach its contents and give the set a separate line number.

Name photographs and drawings with the matching enquiry line.

Keep different installed executions separate. Where drawings concern an earlier supply, explain which assemblies remain installed and which have changed. Attach the full specification to the enquiry form and add a short description of the task.

Provide a working email address or telephone number for technical clarification. The agreed list will preserve quantities and supply boundaries when comparing equipment, individual parts and complete assemblies.