Views: 0 Author: Site Editor Publish Time: 2026-09-30 Origin: Site
Karvil Machinery has completed the factory testing and shipment of a 300L explosion-proof planetary mixer for a repeat customer in Romania.
Designed for processing potentially explosive and hazardous materials, this customized planetary mixer combines vacuum processing, jacketed temperature control, SS316L product-contact parts and multiple safety interlocks in one system.
For this project, the customer required a reliable mixing solution without a high-speed disperser, with particular attention to explosion protection, material compatibility and controlled processing conditions.
The mixer has a 381L design volume and a working capacity of 100–300L.
The product-contact parts are manufactured from SS316L stainless steel, with the vessel internally and externally mirror polished.
The mixing system uses two SS316L helical agitators, driven by a 22 kW explosion-proof motor through a hardened-surface gearbox.
The mixing speed can be adjusted from 5 to 50 rpm, allowing the customer to select an appropriate speed according to the material and process.
Working volume: 100–300L
Design volume: 381L
Product-contact material: SS316L
2 × SS316L helical agitators
22 kW explosion-proof motor
Mixing speed: 5–50 rpm
PTFE removable wall scraper
Hydraulic lifting system
DN65 bottom discharge
Explosion-proof control cabinet
Siemens Beide explosion-proof motor
Fulings frequency inverter
Schneider electrical components
The mixer is equipped with an explosion-proof vacuum system, including a vacuum pump, buffer tank and connecting piping.
The system can reach a vacuum level of up to -0.09 MPa.
A specially designed buffer tank helps reduce the risk of vacuum-pump oil flowing back into the mixing vessel.
The top cover also includes dedicated connections for vacuum, venting and pressure monitoring.
The 381L SS316L vessel is equipped with a pressure-rated heating jacket up to 2 bar.
Two temperature sensors are installed:
One for monitoring the material temperature
One for monitoring the jacket heat-transfer medium temperature
Both temperatures can be displayed on the electrical control cabinet.
This configuration allows the customer to monitor the material and jacket temperatures separately during mixing.
Because the machine is designed for potentially explosive materials, safety was an important part of the project.
The configuration includes explosion-proof electrical components, an explosion-proof mixing motor and explosion-proof vacuum equipment.
The machine also incorporates several safety interlocks, including:
Emergency-stop protection
Vessel-position interlock
Vacuum-pressure interlock
Mixing and lifting interlock
Automatic upper-cover stop
Frequency-inverter protection
Overload and overcurrent protection
Overvoltage and phase-loss protection
Vacuum backflow protection
The exact explosion-proof specification should always be matched to the customer's hazardous-area classification and process conditions.
The mixing head is lifted by a hydraulic cylinder, with a lifting stroke of up to 1100 mm.
The vessel uses a DN65 bottom-side discharge outlet with valve, allowing processed material to be discharged downward.
For materials that are particularly difficult to discharge, Karvil can also supply a separate hydraulic press-out system matched to the mixing vessel.
Before shipment, the complete system was assembled and tested at the Karvil factory.
The factory test covered the major operating functions, including:
Planetary mixing → Hydraulic lifting → Vacuum system → Temperature monitoring → Control system → Safety interlocks
Testing the machine before delivery allows the customer to verify the main functions before the equipment leaves the factory.
This project is also another order from a long-term customer in Romania.
For repeat customers, Karvil can build on previous project experience and adjust the new equipment according to updated process requirements.
For this project, the customer required a combination of:
Explosion protection + vacuum processing + jacket heating + SS316L contact parts + hydraulic lifting + controlled discharge
The final machine was manufactured and tested according to the agreed technical configuration before shipment.
Every hazardous-material mixing process has different requirements.
If you are selecting a planetary mixer for explosive or potentially hazardous materials, send us your:
Material name
Viscosity
Batch size
Density
Working temperature
Vacuum requirements
Heating or cooling requirements
Hazardous-area classification
Our engineering team can recommend a suitable planetary mixing, vacuum, heating and safety configuration for your process.
Request a Technical Proposal →
