The press can't fix what preparation got wrong

Feed entry

Three feed entries, three different scopes

Control points

The preparation numbers that protect yield

Prep flow

Preparation steps before the first barrel

• De-stone and remove metal and stalks; protect both the sheller and the press.
• Shell pods and separate hulls; size the sheller to match press throughput so it never starves the press.
• Grade kernels by size for uniform pressing, and reject moldy or insect-damaged kernels where aflatoxin concentrates.
• Bring moisture to 5-8% and hold it stable batch to batch; drifting moisture is blamed on the press but starts here.

Strong front-end preparation removes most arguments about machine size that are really feedstock problems.

Why it matters

Why preparation, not tonnage, decides peanut yield

When a peanut line underperforms, the press is usually the first thing blamed and the last thing at fault. A hydraulic press applies steady pressure; it cannot compensate for feed that arrives in mixed sizes, drifting moisture, or with damaged kernels mixed in. Start with shelling: peanut shell is 30-40% of pod weight and contains no oil, so any pod-based project must size a sheller that keeps pace with the press, otherwise the press starves and hourly output collapses regardless of its tonnage. Next is moisture. The 5-8% window is where kernels release oil cleanly under pressure; above 10% the oil emulsifies and yield falls while mold risk climbs, and below 4% friction rises and the cake turns brittle and hard to handle. Because moisture varies between incoming lots, testing every batch and conditioning to a stable target is what keeps yield consistent shift after shift. Then comes grading and aflatoxin control, which are inseparable for food-grade peanut oil. Aflatoxin B1, produced by Aspergillus flavus, concentrates in moldy, broken, and insect-damaged kernels, so color sorting or manual picking plus per-batch testing keeps oil under the EU limit of 20 μg/kg and the US FDA limit of 20 ppb. One contaminated batch can reject an entire export shipment, which makes preparation a commercial safeguard in its own right. Get these four things — shelling capacity, stable moisture, uniform grading, and aflatoxin control — right, and the hydraulic press becomes predictable; skip them, and no amount of extra tonnage will fix the result.

Project boundary

What to confirm before scoping Peanut Raw Material Preparation

Peanut Raw Material Preparation should not be quoted from an equipment name alone. Check feed lots, target oil, post-press handling, and packing rhythm in one scope before deciding which Peanut Oil Press modules stay. Listed on the factory hot-press page — discuss 300/325 first.

When feed condition, moisture, impurities, batch weight, and product position are unclear, press tonnage and filter area become guesswork. Factory systems share 60 MPa and 2.2 kW motors; hot pure press is 30–40 min/barrel and cold pure press is ~2 h/barrel — cycle time matters more than brochure tonnage.

• Confirm whether feed is whole seed, kernels, pretreated material, or an existing semi-finished stream.
• Confirm whether the target is crude oil, filtered oil, bottled oil, drum ingredient oil, or a refining handoff.
• Hot cycle reference: pure press 30-40 min/barrel, ~1.5 h for 2 barrels with loading; cold pure press ~2 h/barrel, ~4.5 h for 2 barrels.
• Confirm batch rhythm, labor, changeover, retained samples, power (often 380V/50Hz/3ph), and site install conditions.

Factory model check

Match hot / cold models to factory hard data

Pin models to published factory specs before tonnage talk.

Hot 300/325: 300–325 ton, 60 MPa system, standard barrel Ø390×800 mm / max 100 kg, pure press 30–40 min/barrel, ~1.5 h for 2 barrels with loading, 2.2 kW motor. Cold 355/400/426/480/500: 370–630 ton, integrated frame, same 100 kg standard barrel, pure press ~2 h/barrel, ~4.5 h for 2 barrels with loading; optional Ø300 high-pressure barrel max 60 kg. Residual oil target ~≤5% (peanut hot often 6–8% measured).

• Standard barrel Ø390×800 mm, max ~100 kg crushed feed; optional Ø300 high-pressure barrel max ~60 kg.
• Cylinder material 27SiMn; cold frames are integrated molded steel; hot frames are typically H-type channel steel.
• Listed on the factory hot-press page — discuss 300/325 first.

Equipment check

project scope needs to land in equipment interfaces

Once the route is clear, write the interfaces: how preparation feeds the press, how oil leaves the press, how filtration connects to tanks, and how packing receives finished oil.