A cashew steaming machine cooks raw cashew nuts with steam or hot air. This softens the shell and kills harmful bacteria. The machine handles 200 to 1200 kg of cashews per hour depending on the model. Small box-type units process 200–300 kg/h. Large continuous systems with steam boilers reach 1000–1200 kg/h.
The steaming step is critical in cashew processing. It happens after grading and before shelling. Proper steaming makes the shell brittle. This allows the shelling machine to crack the nut cleanly. It also reduces kernel breakage and improves whole kernel recovery.
This machine uses either electric heating, gas heating, or an external steam boiler. The choice depends on your facility and production scale. All contact parts use food-grade materials. The system is designed for continuous or batch operation in commercial cashew plants.
Taizy has supplied cashew processing equipment for over 10 years. Machines are exported to Africa, Asia, and South America. Every cashew steaming machine is backed by a 12-month warranty and technical support.
What Are the Technical Specifications of the Cashew Steaming Machine?
The machine comes in three standard configurations. Each matches a different production scale.
| Parameter | Small Box Type | Medium Continuous | Large Continuous |
|---|---|---|---|
| Capacity | 200–300 kg/h | 600 kg per batch | 1000–1200 kg/h |
| Power | 24 kW | 7.5 kW | 0.75 kW (conveyor) |
| Voltage | 380V, 50Hz | 380V, 50Hz | 380V, 50Hz |
| Dimensions | 1500×600×1550 mm | 2000×1500×2800 mm | 2000×1000×2800 mm |
| Weight | 150 kg | — | — |
| Tray quantity | 24 trays | — | — |
| Heating | Electric or gas | Steam boiler | Steam boiler |
| Gas consumption | 4 kg/h (gas model) | — | — |
| Material | Food-grade steel | Carbon steel | Carbon steel |
| Control | Manual or automatic | Automatic cylinder feeding | Automatic |
How Does the Cashew Steaming Machine Work in a Processing Line?
The machine is the third stage in a complete cashew processing line. It sits between the grader and the shelling machine.
Complete Cashew Processing Flow
- Raw cashew intake: Nuts arrive from farms and are cleaned.
- Grading: A sorting machine separates nuts by size for even steaming.
- Steaming: The cashew steaming machine cooks the nuts. Shells soften and bacteria are killed.
- Shelling: The automatic shelling machine cracks the softened shells.
- Shell and kernel separation: A separator removes shells from kernels.
- Kernel drying: Wet kernels enter a dryer to reduce moisture.
- Cooling: Kernels cool until the skin can be rubbed off by hand.
- Peeling: A peeling machine removes the testa skin from kernels.
- Humidifying: Kernels are moistened slightly for grading.
- Kernel grading: A sorting machine separates kernels by size and quality.
- Finished kernels: Ready for roasting or packaging.
- Roasting and flavoring: Kernels are roasted into various flavors.
The steaming step determines how well the shelling machine performs. Under-steamed nuts resist cracking. Over-steamed nuts become too soft and break during shelling.
What Heating Options Are Available for the Cashew Steaming Machine?
The machine supports three heating methods. Choose based on your energy costs and facility setup.
Electric Heating
Electric models use heating elements inside the chamber. Power consumption is 24 kW for the small box type. This option is simple to install. It works where electricity is reliable and affordable.
Gas Heating
Gas models burn LPG or natural gas. The small box type consumes 4 kg of gas per hour. This option reduces operating costs where gas is cheaper than electricity. It requires a gas line and ventilation.
Steam Boiler Heating
Large systems use an external steam boiler. The boiler supplies steam to both the steaming machine and the kernel dryer. This is the most efficient option for high-volume production.
Two boiler sizes are available:
| Boiler Parameter | 0.5 Ton Boiler | 1.5–2 Ton Boiler |
|---|---|---|
| Steam output | 0.5 ton/h | 1.5–2 ton/h |
| Power | 9.7 kW | — |
| Blower | 0.75 kW | 2.2 kW |
| Draft fan | 1.1 kW | 3 kW |
| Water pump | 0.55 kW | 2 kW |
| Dimensions | 800×600×2000 mm | Diameter 1400 mm × 3700 mm |
| Coal consumption | 30–40 kg/h | 150–300 kg/h |
| Weight | 2 tons | 8–10 tons |
| Material | Carbon steel | Carbon steel |
| Fuel type | Coal | Coal |
The boiler supplies steam to multiple machines. This reduces total energy cost per kilogram of processed nuts.
Why Is Steaming Critical in Cashew Processing?
Raw cashew shells contain cashew nut shell liquid (CNSL). This is a corrosive oil. It can burn skin and damage equipment. Steaming neutralizes CNSL and makes the shell safe to handle.
Steaming also changes the shell structure. The heat makes the shell brittle. The kernel inside stays firm. When the shelling machine cracks the nut, the shell breaks cleanly. The kernel releases whole.
Without proper steaming, shelling machines crush kernels. Broken kernels sell at 30–50% lower prices than whole kernels. The steaming machine protects your profit margin.
What Are the Main Features of This Cashew Cooking Equipment?
The machine has several design advantages for commercial production.
Even Steam Distribution
Multiple steam inlets ensure uniform heat. Every nut receives the same treatment. This prevents under-steamed or over-steamed batches.
Automatic Feeding and Discharge
The medium and large models use cylinder-controlled feeding. This reduces labor and keeps the process continuous. Operators load the hopper and the machine handles the rest.
Durable Construction
Contact parts use food-grade stainless steel. The frame uses carbon steel for strength. The machine withstands the humid, corrosive environment of a cashew plant.
Flexible Capacity
The small box type suits startups and small processors. The large continuous system suits factories with 1+ ton per hour output. You can start small and add capacity later.
Low Operating Cost
Gas and steam boiler options reduce energy costs compared with electric heating. The closed steam system recycles heat. This lowers fuel consumption.
Case Example: Cashew Processor in Guinea
A cashew processor in Guinea was using manual steaming in drums. The process took 45 minutes per batch. Shell breakage during cracking reached 25%.
They installed the medium continuous cashew steaming machine with a 0.5-ton boiler. Results after one month:
- Steaming time dropped to 15 minutes per batch
- Shell breakage fell to under 8%
- Whole kernel recovery rose from 60% to 78%
- Labor reduced from 4 workers to 1 operator
- Daily output increased from 500 kg to 2,000 kg
Why Choose Taizy for Your Cashew Steaming Machine?
- 20+ years of experience in cashew processing machinery
- Exported to 30+ countries including Nigeria, Vietnam, and India
- Complete cashew line supply from grader to packaging
- Custom voltage and heating options for local conditions
- 12-month warranty on main components
- Remote technical support and spare parts availability
- On-site installation and operator training available
- Steam boiler supply and integration support
Frequently Asked Questions
How long does steaming take?
The small box type steams each batch in 15–20 minutes. Continuous systems process nuts in 10–15 minutes as they move through the chamber. Exact time depends on nut size and desired shell softness.
Can I use the machine without a steam boiler?
Yes. The small box type works with electric or gas heating. Medium and large systems need a steam boiler for efficient operation. We can supply the boiler or you can source it locally.
What happens if I skip the steaming step?
Skipping steaming makes shells too hard to crack cleanly. Kernel breakage increases. CNSL oil remains active and can burn workers. Steaming is essential for quality and safety.
How much steam pressure does the machine need?
The machine works at 0.2–0.4 MPa steam pressure. The boiler should supply saturated steam at this range. Higher pressure wastes energy. Lower pressure under-cooks the nuts.
Can the machine steam other nuts?
The machine is designed for cashews. Other nuts like almonds or macadamias have different shell structures. Contact us before using it for other products.
How many workers does the machine need?
The small box type needs one worker to load and unload trays. The continuous systems need one operator to monitor the process and refill the hopper.
What maintenance is required?
Daily cleaning removes nut debris from trays and chamber. Weekly checks include steam valve inspection and gasket condition. Monthly maintenance includes descaling the boiler and checking heating elements.
Does the machine include a safety valve?
Yes. All steam models include a pressure relief valve. The valve opens automatically if pressure exceeds safe limits. This protects workers and equipment.
Can I add more capacity later?
Yes. You can start with the small box type and add a second unit later. Or you can upgrade to the continuous system. We can help you plan the expansion.
What is the delivery time?
Standard delivery is 30–45 days after order confirmation. This includes production, testing, and export packaging. Boiler delivery may take 45–60 days due to size.
Get a Quote for Your Cashew Steaming Machine
A cashew steaming machine is essential for any commercial cashew processing line. It protects kernel quality, improves shelling efficiency, and ensures worker safety. The right capacity and heating option depend on your daily output and energy costs.
Tell us your daily cashew volume, available energy source, and whether you need a steam boiler. Our team will recommend the right configuration and send you a detailed quotation.
Related Equipment
This modular cashew kernel processing line reaches 100‑800 kg/h throughput, integrating grading, cooking, shelling, drying, peeling and kernel sorting with high whole‑kernel rate. It serves as ideal pre‑processing equipment matching the nut roasting machine: sorted cashew kernels flow into the roaster for aroma enhancement, forming a complete cashew deep‑processing workflow for nut‑processing factories and export‑oriented nut enterprises.
- Core Points: Semi‑auto / full‑auto optional, low kernel breakage rate; pre‑treatment partner for nut roasting machine.
- After‑sales: 12‑month full‑machine warranty, customizable capacity and whole‑line layout.
