Build an RFQ brief from recorded conditions, then review the supplier-confirmation checklist below. Final design values require equipment-specific approval.
Content reviewed 8 October 2026 against the cited manufacturer sources.
Enter measured process values. The brief organizes your inputs and supplier questions; it does not calculate approved design limits.
Enter any details you have. Unknown fields will be listed for follow-up rather than guessed.
System-specific geometry
Rotor and shaft dimensions must match the installed degasser and vessel. Manufacturer ranges apply to named product models.
Process-matched material
Grade and treatment need review against alloy, gas or flux, temperature, and operating cycle.
Approved interfaces
Record the connection and have the supplier confirm fit, tolerances, and inspection criteria on the drawing.
A useful specification connects the rotor to its machine, installation, and melt-treatment duty. The published examples below are product-specific; they do not establish an industry standard for dimensions, material properties, or fit.
Shaft: specify measured length and the installed drive.
Connection: confirm coupling and fit with the degasser maker.
Rotor head: match the vessel and treatment process.
Material: validate grade or treatment for the melt conditions.
| Specification Area | Common Risk | Recommended Approach |
|---|---|---|
| Assembly geometry and connection | A rotor or shaft does not match the treatment vessel or degasser interface. | Reference the machine and vessel drawings; obtain supplier approval for head geometry, shaft length, and coupling. |
| Speed and inspection | A copied speed or balance target may not fit the rotor, shaft, or installed equipment. | Record the operating range and ask the equipment maker to define runout/balance acceptance and its inspection method. |
| Graphite grade and treatment | Grade or treatment selection without the gas, alloy, and operating cycle may be unsuitable. | State the requested graphite grade/treatment and ask the supplier to document compatibility and any dimensional change on the controlled drawing. |
| Process conditions | Missing gas/flux, melt temperature, or alloy makes it hard to review the requested material and rotor design. | Include alloy, temperature, gas or flux, flow settings, and treatment cycle; ask the supplier to recommend a qualified grade for those conditions. |
Separate measured machine inputs from values the supplier still needs to engineer. Mark unknown items as open questions rather than filling them with generic defaults.
The references below document manufacturer-specific product options and application demands. They do not establish universal rotor dimensions, thread clearances, graphite density/grain requirements, or runout limits. No such general limit was found in the sources reviewed for this page; confirm each requirement with the equipment maker and supplier. Sources accessed 8 October 2026.
Application page; accessed 8 October 2026
Describes thermal shock, strength, and chemical-resistance demands in rotating gas-distribution service and identifies graphite rotor heads as an application. It does not define universal rotor dimensions or tolerances.
Product brochure; accessed 8 October 2026
Lists typical operating speeds for named rotor models and distinguishes their materials and coupling options. Foseco labels the figures as guidance, not a specification; they are not universal operating limits.
Product page; accessed 8 October 2026
Describes rotor/shaft options for different operating conditions and a range of graphite grades. The supplier directs customers to an application engineer for selection.
Product sheet dated February 2019; accessed 8 October 2026
Gives examples of its own rotor designs and sizes, and asks customers to contact a representative for other project requirements. Product-specific figures are not an industry-wide standard.
Published manufacturer examples specify different head sizes, shaft dimensions, and coupling options for their own product families. The correct assembly depends on the degasser model, vessel geometry, and process. Use the equipment drawing and get the supplier to approve the final dimensions.
Start with the installed degasser, vessel or launder drawing, immersion position, and required mixing behavior. Manufacturer brochures show product-specific options, not a universal capacity-to-diameter formula.
Record the actual operating range and ask the degasser maker and rotor supplier for permitted speed, runout, and balance acceptance for the assembled design. The sources reviewed do not support one general RPM threshold or TIR limit for all rotors.
No. Identify the mating part, connection type, drawing revision, and any treatment or coating. Have the supplier state the inspection method and approve the fit and tolerances for the actual assembly; this page does not establish a universal clearance or tolerance.
Include the degasser make/model, vessel geometry, immersion depth, operating speed, alloy, melt temperature, gas or flux and flow settings, rotor/shaft dimensions, coupling, graphite grade or treatment, and the inspection or service-life criteria you need the supplier to address.
No. It organizes the information entered and highlights questions for the equipment maker and supplier. A qualified supplier must confirm material compatibility, final geometry, tolerances, and operating limits against your machine and process.
Submit your assembly drawings and specifications to our engineering team to review tolerances and request a quotation.
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