HD51FCHD-1M22BSManufacturer manual example of designation structure; not a confirmed stock configuration.
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DESMI ROTAN · Product family
DESMI ROTAN Heavy-duty cast-iron internal gear pump HD for Viscous oils and bitumen
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 flow250 m³/h
Maximum differential pressure16 bar
Maximum speed1,750 rpm
EXPLORE THIS PRODUCT DOSSIER
Product, engineering and service information in one place
ENGINEERING DATA
Technical specifications
Independent family limits. They are not simultaneous operating points and do not establish the rating of an individual pump size.
| Parameter | Published reference |
|---|---|
| Maximum family flow | 250 m³/h |
| Maximum differential pressure | 16 bar |
| Maximum speed | 1,750 rpm |
| Maximum viscosity | 250,000 cSt |
| Maximum liquid temperature | 250 °C |
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.
Reading the ROTAN designation
The manual example is HD51FCHD-1M22BS. The final characters must be read by position: the two successive 2 characters identify bushes here, not a double mechanical seal.
HD- Heavy-duty cast-iron ROTAN family
51- Nominal size 51 (DN 50 in the code chart)
F / CHD- Flanged arrangement / special chocolate-duty design described in the manual
1 / M / 2 / 2 / B- Cast iron / externally lubricated bearings / bronze idler bush / bronze main bush / packing
S- Special configuration; obtain its build-specific definition
Materials & performance
Cast-iron construction; bearing and seal materials depend on the designation.
Confirm cold-start viscosity, inlet conditions and whether heating is needed before choosing speed. Request the configuration-specific curve and motor calculation.
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
- Viscous oils and bitumen
- Paint, resin and adhesive transfer
- Chocolate or molasses duties subject to process and hygiene 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 HD
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 HD: how to read the operating range
Maximum family flow: 250 m³/h; Maximum differential pressure: 16 bar; Maximum speed: 1,750 rpm; Maximum viscosity: 250,000 cSt. 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 HD: model and configuration checklist
Identification references include HD51FCHD-1M22BS. Use the complete nameplate designation, serial number, connection, materials, seal arrangement and drive details when requesting a replacement or quotation.
APPLICATION REVIEW
ROTAN HD: materials and suitable duties
Cast-iron construction; bearing and seal materials depend on the designation. Typical duties to review include Viscous oils and bitumen, Paint, resin and adhesive transfer, Chocolate or molasses duties subject to process and hygiene review. Confirm cold-start viscosity, inlet conditions and whether heating is needed before choosing speed. Request the configuration-specific curve and motor calculation.
SERVICE PLANNING
ROTAN HD: 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 HD
Use these answers to prepare a technically complete comparison and enquiry.
How should DESMI ROTAN ROTAN HD 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 HDRelated DESMI ROTAN products
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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
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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
DESMI ROTAN · Model size reference
DESMI ROTAN Internal gear pump — size reference HD81 for Replacement identification for an installed HD81
Internal gear pump — size reference
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.
- Family
- ROTAN HD
- Nominal size reference
- 81 / DN 80 / 3 in (manual code chart)
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