Reactor Stirrer Shaft

Name: Reactor Stirrer Shaft | Chemical Mixing Drive Shaft – Frigate
Price: 249.00 USD
Availability: InStock

Reactor Stirrer Shaft is engineered to withstand high torsional loads during non-Newtonian mixing without exceeding elastic limits. Finite Element Analysis ensures the shaft geometry resists angular deflection and maintains angular velocity uniformity under transient torque loads. Shaft dimensions are optimized for L/D ratios that minimize bending moments and misalignment in vertical or horizontal reactor setups.

Overall Length

500–5000 mm (±0.5 mm/m), Custom lengths up to 10m (±1 mm/m)

Shaft Diameter(s)

25–150 mm (±0.02 mm), Stepped – ±0.05 mm per transition, Taper – 0.02 mm/100mm

Material Specification

316L SS (ASTM A276), Hastelloy C-276 (ASTM B574), Titanium Gr.2 (ASTM B348)

Runout Tolerance

≤0.05 mm/m (Static), ≤0.1 mm/m (Dynamic at max RPM)

Surface Finish

Seal Areas – Ra ≤0.2 µm, General – Ra ≤0.8 µm, Threads – Ra ≤1.6 µm

Product Description

Reactor Stirrer Shaft nutzt advanced metallurgy, including Hastelloy C-22, Alloy 825, and Super Duplex SS, to handle chloride-induced pitting, intergranular attack, and crevice corrosion. Material selection is based on electrochemical corrosion data aligned with specific process chemistries, ensuring stable operation across oxidizing, acidic, or alkaline environments without degradation of mechanical integrity.

Impeller Mounting Interface

Keyway (ISO 7738 – DIN 6885), Threaded (M20–M64), Flanged (ASME B16.5), ±0.01 mm fit

Seal Area Specifications

Diameter – h6 tolerance, Hardness – ≥35 HRC (for mechanical seals), Ra ≤0.1 µm (for lip seals)

Balance Requirements

G2.5 (ISO 1940-1), ≤1 g·cm residual unbalance (for >1000 RPM)

Concentricity

≤0.03 mm TIR (Total Indicated Runout) relative to centerline

Certification Standard

ASME BPE (Bioprocessing), ISO 9001, EN 10204 3.1 (Material Certs), ASTM E290 (Bend Test)

Technical Advantages

The Linear Motion Ball Screw’s hardened steel shaft and wear-resistant ball bearings are engineered to withstand high axial loads while maintaining preload integrity. Optimized ball recirculation paths reduce stress concentrations, preventing premature fatigue and pitch error development. This design extends operational life, even under continuous heavy-duty conditions.

Linear Motion Ball Screws provide uniform load distribution through multiple rolling elements, significantly dampening vibrations transmitted to the system. The consistent ball-to-raceway contact reduces mechanical noise and prevents stick-slip behavior, which is essential for precision machining and sensitive measurement equipment.

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Industry Applications

Pharmaceutical API Synthesis Reactors

Used for precise agitation in multi-phase chemical reactions under sterile, high-viscosity, and temperature-controlled batch manufacturing environments.

Petrochemical Polymerization Vessels

Provides torque transmission for mixing high-molecular-weight polymers in jacketed reactors with pressure and temperature cycling conditions.

Specialty Chemical Batch Reactors

Handles corrosion-resistant mixing in acidic or basic media, ensuring homogeneity during solid–liquid or liquid–liquid phase reactions.

Biofermentation Reactors

Supports axial-radial mixing for aerobic and anaerobic fermentation, maintaining shear-sensitive environments with aseptic-grade construction.

Agrochemical Synthesis Plants

Operates under high-shear conditions to disperse insoluble particulates in reactive media with elevated process temperatures and pH variability.

Food Additive Manufacturing Reactors

Delivers uniform mixing of emulsions and suspensions under CIP/SIP-compatible conditions with low surface roughness shaft finishes.

Dynamic Balancing for Vibration-Free Operation

Reactor Stirrer Shaft undergoes dynamic balancing as per ISO 1940 G1.0 or better for high-speed applications above 1500 RPM. Mass asymmetries are corrected to prevent imbalance-induced loads on bearings and agitator assemblies. This results in reduced noise levels, improved bearing life, and stable operation during transient mixing cycles.

Reactor Stirrer Shaft offers tailored surface roughness levels down to Ra ≤ 0.2 µm for clean-in-place (CIP) and sterile processing. Electropolishing, hard coating, or fluoropolymer-lining options are available to meet surface energy and chemical resistance requirements in pharmaceutical or food-grade environments. Surface treatments improve both cleanability and corrosion resistance.

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional stability of the Reactor Stirrer Shaft during thermal cycling?

Frigate selects materials with low thermal expansion mismatch based on process temperature profiles. Each shaft is thermally stress-relieved and verified using ultrasonic testing. We simulate expansion effects in CAD models for tight-clearance applications. This prevents warping and misalignment during high-temperature operations.

What tolerances does Frigate maintain for shaft-to-seal interface precision?

Frigate maintains axial run-out below 10 microns and surface finish up to Ra 0.2 µm. This ensures tight sealing and prevents leak paths. The sealing zone is machined separately and validated using coordinate measuring machines (CMM). These tolerances improve seal life and minimize maintenance frequency.

Can Frigate customize the stirrer shaft design for non-standard impeller connections?

Yes, Frigate manufactures shafts with customized end geometries including taper fits, spline ends, or flanged joints. We validate mechanical compatibility through CAD simulation and interference fit analysis. Final shaft-end profiles are CNC machined to customer specs. This ensures seamless coupling with agitator hubs.

How does Frigate handle high-viscosity mixing in terms of shaft design?

Fregatte increases shaft diameter and uses torsion-resistant alloys to manage high mixing loads. We analyze torque transfer and bending stress using simulation software. For extremely viscous fluids, we incorporate dual-support systems to control lateral deflection. This maintains uniform impeller motion and reduces bearing wear.

What is Frigate’s process for selecting corrosion-resistant materials for the stirrer shaft?

Frigate studies the chemical composition and operating temperature of the process media. Based on corrosion potential, we suggest materials like Hastelloy, Titanium, or Duplex SS. We review industry corrosion charts and apply ASTM material compatibility standards. Each shaft comes with full material traceability and MTC.

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