Normal and alternate duty
Define the flow and differential head for the conditions the process will actually use. Include changes in liquid properties or solids loading between those cases.
DW WEAR-RESISTANT SERIES
DW Wear-Resistant Single-Stage Process Pump
DW is a wear-resistant single-stage process pump for abrasive and corrosive applications. The published design combines hydraulics focused on reducing erosion with selection of parts materials for the liquid conditions. Gas-removal construction is also offered.
7,000 m³/hCapacity
110 mHead
16 / 25 bar*Pressure
180°CTemperature
* Separate series limits; allowable duty and pressure depend on size, material and configuration. Source: Family Brochure, page 2.
ENGINEERING PROBLEM
Hydraulics and materials selected together.
The DW brochure addresses erosion through hydraulic design and material selection. Assess the liquid chemistry, solids and operating conditions as one duty when defining the proposed pump.
01 / HYDRAULICS
Erosion-focused design
The published DW design targets erosion in abrasive service. Tie the selected hydraulic arrangement to the actual slurry and operating duty.
02 / MATERIALS
Parts matched to the liquid
The brochure links parts-material selection with corrosive conditions. Identify grades by wetted component using the liquid composition, temperature and solids information.
03 / GAS
Gas-removal construction
Gas-removal construction is offered in the DW overview. Include gas content, suction conditions and the start-up requirement when defining that option.
Published design overview: family brochure, page 2.
HYDRAULICS & MATERIALS
Select for the whole slurry.
The DW brochure pairs erosion-focused hydraulics with selection of parts materials for corrosive conditions. Assess the carrier liquid and the solids together when defining the wet end.
Scroll sideways to compare all columns →
| Condition | Why it changes the review | What the proposal should identify |
|---|---|---|
| Liquid chemistry and temperature | Corrosive conditions affect which component materials are suitable. | Grades by wetted component, with the stated liquid conditions. |
| Particle size, shape and hardness | Solids properties help define the abrasive duty. | The hydraulic arrangement and material choice tied to the solids description. |
| Solids loading | Mass and volume concentrations describe different quantities. | Concentration basis and the normal-to-maximum loading range. |
| Seal and auxiliary conditions | Containment and the liquids available for auxiliaries affect the sealing review. | The seal arrangement and agreed service connections. |
General slurry-property reference: Hydraulic Institute slurry properties. Use the chemical resistance guide for preliminary liquid screening.
PERFORMANCE & SPEED
Keep the curve with the liquid conditions.
A selected pump curve connects flow and head at a stated speed and impeller. The review also needs the liquid density, viscosity and solids conditions to assess the proposed duty and driver.
Speed, impeller and test liquid
Identify the curve basis and the selected rpm. Where the process liquid differs from the curve's test liquid, include the relevant performance assessment in the selection record.
Driver and suction conditions
Keep motor frequency and voltage, power requirements, suction conditions and gas content with the proposal. Review a change in speed as a change in the complete duty.
General performance reference: Hydraulic Institute pump FAQs. The DW series range is published in the family brochure, page 2.
DW APPLICATIONS
Application groups in the published range.
Select against the actual liquid and operating conditions within these application groups.
Abrasive and viscous liquids
Keep liquid viscosity, chemistry and temperature with the particle description. The selected curve and configuration should address those operating conditions.
Fibrous and non-fibrous slurries
Record loading, particle properties and wear history. For fibrous service, include accumulation behaviour so passage is assessed alongside abrasion.
Large solids and gas-containing streams
The brochure includes abrasive large-solids and gas-containing duties, including selected self-priming applications. Identify the passage, gas-removal and suction requirements together.
Application groups: family brochure, page 2.
DW OR DN?
Start With the Failure Risk
DW
DW: abrasive wear
Start with DW when surface loss or erosion dominates. Record the wear pattern, existing construction and operating conditions.
DN
DN: solids passage
Review DN when large particles, fibers or recurring blockage dominate. A harder material alone does not establish whether the solids will pass.
WEAR & MAINTENANCE REVIEW
Turn wear observations into a useful comparison.
Compare service history against the conditions that produced it. A record of what wore, when it was inspected and what changed is more useful than a service-life number alone.
- 01 / Establish the baselineRecord the installed model, materials, duty, speed and solids conditions over the observed interval.
- 02 / Locate the wearKeep dated photographs of the affected surfaces with inspection and replacement records.
- 03 / Compare a proposed changeIdentify the changed materials or configuration, the operating conditions and the same inspection criteria.
Define maintenance access
Use the proposed GA and maintenance instructions to review removal space, coupling access and the parts included in the supply. Agree any required spare parts in the quotation.
Define how results will be judged
Record the observation period and relevant process changes. An evidence-based comparison keeps the result tied to the application rather than promising a universal wear-life improvement.
DW RFQ CHECKLIST
What to Send for DW Review
Keep the slurry, operating conditions and wear observations together. For an installed pump, start a replacement review.
- Normal and alternate flow/head, units, speed and suction arrangement
- Liquid composition, temperature, viscosity and corrosive conditions
- Solids identity, concentration basis, particle size/shape and available hardness data
- Fibers, gas content and any priming requirement
- Wear location, current materials, service interval and inspection photographs
- Installed model, nameplate, curve/GA and installation interfaces to retain
- Supply scope, quantity, destination and required records or acceptance criteria
TECHNICAL DOCUMENTS
Connect the range to a defined configuration.
The family brochure describes the DW design, application groups and series limits on page 2. A model review adds the curve, construction and installation information needed for the particular duty.
Open Family Brochure
Keep these with the proposal
- Selected model curve, speed and impeller identity.
- Materials by component and the sealing arrangement.
- GA, maintenance access and supply scope.
- Agreed inspection, testing and required records.
SELECTION QUESTIONS
DW pump questions
Does a wear-resistant material also resist corrosion?
Material selection must address the actual liquid chemistry, temperature and solids. The DW brochure combines hydraulic design with material selection for those conditions. Identify the required grades by component in the proposal.
Why is the solids concentration basis important?
A percentage by mass and a percentage by volume describe different mixtures. State the basis and the solids properties so the selection is assessed against the intended slurry.
Can I use a clean-water curve directly for a slurry?
Keep the curve's test basis with the selection. Viscosity and slurry conditions may require a performance assessment before confirming the duty and driver. State the liquid properties with the operating points.
Is DW the same as a heavy-duty slurry pump?
DW is presented as a wear-resistant single-stage process pump. Match the actual particle, loading, liquid and duty requirements to the proposed design. A wear-resistant label alone does not establish suitability for every slurry application.
When should DN be reviewed alongside DW?
Include DN when large particles, long fibers or recurring blockage are significant. Describe both wear and plugging, since solving the material-loss problem still leaves passage to be checked.
Can a longer service life be promised from material choice alone?
A useful comparison needs the operating conditions, current construction, inspection records and observation period. Use those to assess a proposed change and define the acceptance criteria for the application.
What helps most with a replacement enquiry?
Start with the nameplate, duty and current wear problem. Add the material description, wear photographs and available curve or GA. Identify the installation interfaces and parts of the package you want to retain.
DW ENGINEERING REVIEW / RFQ
Send the wear and slurry data for DW review.
Share your duty, slurry conditions and wear history to start a DW selection or replacement review.
Request DW Selection