HD81Base family/size reference in the ROTAN designation system.
Enquire with this reference →
DESMI ROTAN · Model size reference
DESMI ROTAN Internal gear pump — size reference HD81 for Replacement identification for an installed HD81
HD81 identifies a size within the heavy-duty ROTAN cast-iron family. This page supports identification and replacement enquiries, including the full designation supplied to DFIN: HD81EFCHD-1M22B.
FamilyROTAN HD
Nominal size reference81 / DN 80 / 3 in (manual code chart)
Individual flow, speed and pressureConfirm from the selected configuration and duty curve
EXPLORE THIS PRODUCT DOSSIER
Product, engineering and service information in one place
ENGINEERING DATA
Technical specifications
Published range for this family or model group. Maximum values are independent limits; the actual duty point depends on speed, fluid, size and configuration.
| Parameter | Published reference |
|---|---|
| Family | ROTAN HD |
| Nominal size reference | 81 / DN 80 / 3 in (manual code chart) |
| Individual flow, speed and pressure | Confirm from the selected configuration and duty curve |
| Enquiry designation | HD81EFCHD-1M22B — full build unverified |
IDENTIFY THE RIGHT BUILD
Models & configuration
A family or hydraulic size is the starting reference. Include the complete nameplate designation, serial number, materials, seals, drive and connection details when ordering.
HD81EFCHD-1M22BCustomer-supplied enquiry reference. Exact assembled configuration requires manufacturer or nameplate confirmation.
Enquire with this reference →Reading the ROTAN designation
This is a positional reading of the published code chart, not verification that the complete customer-supplied designation is an available or correctly configured assembly.
HD / 81- Heavy-duty cast iron / nominal DN 80 size
E / F- Straight-through connection arrangement / flange code
CHD- Special chocolate-duty arrangement described by the manual
1 / M / 2 / 2 / B- Cast iron / external bearing lubrication / bronze idler bush / bronze main bush / packing
Materials & performance
Cast-iron construction; bearing and seal materials depend on the designation.
Send a clear nameplate photo and serial number. Include start-up and running viscosity, temperature, required flow and differential pressure. A family maximum must not be used as the HD81 duty point.
DFIN reviews the operating point together with the suction condition and drive. Supply the fluid properties at both start-up and normal operation so the proposed arrangement can be checked against the appropriate curve.
Application industries
DFIN application links identify duties to discuss, subject to the specified fluid and complete pump configuration.
Typical duties to review
- Replacement identification for an installed HD81
- Heated viscous-liquid transfer after configuration review
ROTAN documentation does not establish FDA / 3-A approval for these pumps. A food-related duty needs a separate review of hygiene, cleaning and the required documentation.
Compatible parts & service
Use the pump serial number, complete designation and assembly drawing to identify the shaft seal or packing, rotor, idler, bushes, gaskets and relief-valve components.
Send the required component positions and the existing material codes with your enquiry. Kit numbers are confirmed against the pump build; a WILDEN Air Kit or Wet Kit does not apply to this gear-pump design.
Maintenance planning
Use the selected model’s operating manual for isolation, draining, inspection and reassembly. Report leakage, unusual noise, loss of output or visible wear with photographs and the operating history. DFIN can use the equipment identity and drawing positions to prepare a parts enquiry.
Request matching service parts →DFIN KNOWLEDGE BASE
DFIN technical notes for ROTAN HD81
Shanghai Dfin Pump Co., Ltd. has reorganised the available product facts into practical notes for identification, selection, application review and maintenance planning. These notes support an initial comparison; the final duty point and order code still require project-specific confirmation.
PERFORMANCE NOTE
ROTAN HD81: how to read the operating range
Family: ROTAN HD; Nominal size reference: 81 / DN 80 / 3 in (manual code chart); Individual flow, speed and pressure: Confirm from the selected configuration and duty curve; Enquiry designation: HD81EFCHD-1M22B — full build unverified. These figures describe the documented family or model reference; the usable duty point must be checked against speed, liquid properties, suction conditions and the selected drive.
MODEL IDENTIFICATION
ROTAN HD81: model and configuration checklist
Identification references include HD81, HD81EFCHD-1M22B. Use the complete nameplate designation, serial number, connection, materials, seal arrangement and drive details when requesting a replacement or quotation.
APPLICATION REVIEW
ROTAN HD81: materials and suitable duties
Cast-iron construction; bearing and seal materials depend on the designation. Typical duties to review include Replacement identification for an installed HD81, Heated viscous-liquid transfer after configuration review. Send a clear nameplate photo and serial number. Include start-up and running viscosity, temperature, required flow and differential pressure. A family maximum must not be used as the HD81 duty point.
SERVICE PLANNING
ROTAN HD81: maintenance and spare-parts preparation
Use the pump serial number, complete designation and assembly drawing to identify the shaft seal or packing, rotor, idler, bushes, gaskets and relief-valve components. Isolate the equipment, follow the applicable maintenance procedure and confirm every replacement item against the installed configuration before ordering.
PRODUCT & ENGINEERING FAQ
Questions about DESMI ROTAN ROTAN HD81
Use these answers to prepare a technically complete comparison and enquiry.
How should DESMI ROTAN ROTAN HD81 be selected?
Start with the real duty point: fluid, flow, differential pressure or head, temperature, viscosity, solids, suction condition and operating pattern. DFIN then reviews size, materials, sealing and drive.
Are the listed maximum values a guaranteed operating point?
No. They describe independent catalog boundaries for the family or model. The selected point must be checked against the applicable curve, size, speed, fluid and drive arrangement.
What information confirms the complete model code?
Provide the full nameplate designation and serial number plus materials, seal arrangement, ports, drive, motor supply and any special option. A family name alone is not an order code.
Can DFIN help identify service parts?
Yes. Send the equipment identity, drawing position, existing part code, photographs, material and failure description. DFIN can prepare a parts enquiry matched to the installed configuration.
What should be included in the quotation request?
Include quantity, fluid data, operating point, installation, connection standard, available utilities, hazardous-area requirements and delivery destination. For a replacement, include the nameplate and current drawing.
SHANGHAI DFIN PUMP CO., LTD.
Turn this reference into a clear quotation.
Send the full model and serial number, quantity, fluid, required flow and pressure, temperature, viscosity, installation details and delivery destination. For a replacement, attach the nameplate and existing drawing.
Prepare an enquiry for ROTAN HD81Related DESMI ROTAN products
View the brand collection →DESMI ROTAN · Product family
DESMI ROTAN Heavy-duty cast-iron internal gear pump HD for Viscous oils and bitumen
Heavy-duty cast-iron internal gear pump
ROTAN HD provides a configurable positive-displacement platform for viscous, non-corrosive liquids. Heating and sealing choices make the family relevant to processes where product temperature and viscosity change between start-up and normal operation.
- Maximum family flow
- 250 m³/h
- Maximum differential pressure
- 16 bar
DESMI ROTAN · Product family
DESMI ROTAN General-purpose internal gear pump GP for Lubricating and compatible waste oils
General-purpose internal gear pump
ROTAN GP is a compact cast-iron option for clean, non-abrasive liquid transfer. Its general-purpose construction is a starting point for oil and compatible utility-fluid duties with moderate viscosity.
- Maximum family flow
- 50 m³/h
- Maximum differential pressure
- 16 bar
DESMI ROTAN · Product family
DESMI ROTAN Stainless-steel chemical-duty internal gear pump CD for Compatible acids and alkalis
Stainless-steel chemical-duty internal gear pump
ROTAN CD combines the internal-gear pumping principle with stainless-steel construction for chemically demanding liquids. DFIN reviews the complete wetted path, including seals and bearings, for the specified composition.
- Maximum family flow
- 250 m³/h
- Maximum differential pressure
- 16 bar
DESMI ROTAN · Product family
DESMI ROTAN Magnetically coupled internal gear pump ED for Isocyanates and polyols
Magnetically coupled internal gear pump
ROTAN ED uses a magnetic coupling for duties where containment and maintenance of the shaft-seal area are central concerns. Its application range includes moisture-sensitive or otherwise demanding process liquids.
- Maximum family flow
- 90 m³/h
- Maximum differential pressure
- 16 bar
DESMI ROTAN · Product family
DESMI ROTAN Steel internal gear pump PD for Refinery and petrochemical transfer
Steel internal gear pump
ROTAN PD is the steel-construction member of the ROTAN range for industrial and refinery service. Heating and seal arrangements can be specified around the particular liquid and installation.
- Maximum family flow
- 250 m³/h
- Maximum differential pressure
- 16 bar
MORE PRODUCTS FOR SIMILAR DUTIES
Compare other pump technologies
Cross-brand references that share one or more application pathways with this product.
MAAG · Product family
MAAG Industrial gear pump cinox / therminox for Resin and polymer-liquid transfer
Industrial gear pump
Chemical-duty gear pumps with different heating arrangements. cinox can use electric heating, while therminox incorporates fluid heating or cooling channels for temperature-dependent processes.
- Family flow range
- 0.1–2,400 L/min
- Maximum differential pressure
- 200 bar
MAAG · Product family
MAAG Industrial gear pump refinex / refitherm for Resins, hot-melt adhesives and waxes
Industrial gear pump
A steel gear-pump family for demanding industrial transfer. Electric-heating and fluid-heating variants address processes where viscosity and temperature must be controlled together.
- Family flow range
- 0.5–1,750 L/min
- Maximum differential pressure
- 300 bar
CUCCHI · Product family
CUCCHI Stainless-steel transfer gear pump MX for Resins, adhesives, polyols and isocyanates
Stainless-steel transfer gear pump
MX provides stainless-steel gear-pump options for transferring compatible process liquids. Size-specific curves and connection arrangements support selection across small and larger transfer duties.
- Published viscosity range
- 1–100,000 cP
- Mechanical-seal design temperature
- Up to 200 °C; actual materials govern
CUCCHI · Product family
CUCCHI Transfer gear pump S / SK / SM for Compatible chemical transfer without suspended solids
Transfer gear pump
The S, SK and SM families use machined construction for liquid transfer, with controlled-speed arrangements for suitable metering duties. The selected material and seal arrangement govern chemical compatibility.
- Published viscosity range
- 1–100,000 cP
- Duty selection
- Individual size curve and motor speed required
CUCCHI · Product family
CUCCHI Transfer gear pump B / MG for Oil and compressor-lubrication transfer
Transfer gear pump
B and MG are traditional cast gear-pump families for industrial liquid transfer. Material variants support different fluids; the pump size and seal arrangement need to be confirmed from the individual drawing.
- Published operating pressure
- Up to 15 bar
- Capacity selection
- See the individual size curve
MAAG · Product family
MAAG Industrial gear pump flexinox for Chemical additives and emulsions
Industrial gear pump
A corrosion-resistant gear-pump family for controlled transfer and dosing of process liquids. The accessible three-part housing and optional quick-clean arrangement support applications with cleaning or product-change requirements.
- Family flow range
- 0.4–139 L/min
- Maximum differential pressure
- 100 bar