300L 500L 1000L SUS316 Explosion-Proof Vacuum Mixing Reactor with Jacketed Thermal Oil Heating

Explosion-Proof Vacuum Mixing Reactor — Built for Demanding Chemical Processes

This jacketed reactor series is designed for facilities that handle flammable solvents, viscous polymers, or temperature-sensitive reactions under vacuum. Available in 300L, 500L, and 1000L working volumes, the vessel is fabricated from SUS316 stainless steel — a grade chosen for its resistance to chlorides, acids, and general corrosion in aggressive chemical service. We use full-penetration welding on shell and head seams, followed by pickling and passivation to restore the corrosion-resistant layer. Interior surfaces are polished to a Ra ≤ 0.6 µm finish, which simplifies cleaning between batches and reduces product adhesion.

The jacket uses thermal oil as the heating medium, which gives you precise temperature control up to 200°C without the localized hot spots you get with steam. Cooling is handled by switching the oil loop to a cooling circuit — a standard configuration in most plants. The unit is rated for full vacuum and comes with a mechanical seal on the agitator shaft. The explosion-proof motor and control box are rated for Zone 1 hazardous areas, so you can run this reactor with flammable vapors present without shutting down your line.

Mixing is handled by a fixed-speed anchor agitator with PTFE scrapers, which works well for medium-viscosity products. If your process requires high-shear dispersion or emulsification, we can fit a separate high-speed homogenizer on an additional shaft. We also offer options like a bottom discharge valve, sight glass with light, CIP spray ball, and a pressure-rated manhole for manual inspection.

Typical Applications

• Resin and adhesive production
• Pharmaceutical intermediate synthesis
• Cosmetic emulsions and creams
• Food additives and flavor concentrates
• Lithium battery slurry mixing

Technical Specifications

Frequently Asked Questions

Q: Can I use this reactor for high-acid or high-chloride products?
A: SUS316L handles most organic acids and chloride concentrations up to a few hundred ppm at moderate temperatures. For higher chloride levels, consider a titanium or glass-lined vessel — let us know your fluid composition.

Q: What is the minimum batch size I can process?
A: The anchor agitator works best when the liquid level covers the lower impeller. For the 1000L unit, that means a minimum batch of about 400–500L. If your batches are smaller, we can add a lower-mounted impeller or reduce the vessel size.

Q: How do I clean the reactor between batches?
A: We recommend a CIP spray ball on the top head. The polished interior surface and PTFE scrapers make most residues wash away easily. For sticky polymers, you may need a solvent soak followed by manual wipe-down through the manhole.

Q: What is the lead time and what does the price include?
A: Standard sizes ship in 30–45 days. The price includes the vessel, agitator, mechanical seal, explosion-proof motor, and the oil heating jacket. The thermal oil heater unit and piping are quoted separately since they depend on your heat load.

How to Choose the Right Configuration

Before requesting a quote, define your process parameters: the chemical composition and concentration of your feed, batch volume, operating temperature, pressure (vacuum or positive), and the viscosity of the product. Also note whether you need heating, cooling, or both, and how fast you expect the temperature to ramp. If you\’re dealing with solids or high-viscosity paste, mention the solid content — this affects the agitator design and motor power.

Send us your process details — material, batch volume, operating temperature, pressure, and mixing requirements — and our engineers will recommend the correct vessel configuration and provide a detailed quotation. We\’re a factory-direct manufacturer, so you get the full technical support and customization flexibility without the middleman markup.