Most peanut projects don't fail on press tonnage — they fail on feed, route, and aflatoxin control

Decide first

Pick the route before the machine — here's the quick read

The hot route and cold route are not two settings on one machine. They use different press classes, run different cycle times, and serve different markets. Choose the lane first.

Step by step

The peanut line from raw material to filtered crude oil

1. Step 1

   1 · Shell, clean, and grade

   Remove stones, metal, and stalks. Shell pods (shell 30-40% of weight). Grade kernels by size for uniform pressing. Reject moldy or damaged kernels — aflatoxin concentrates in damaged tissue.

2. Step 2

   2 · Set moisture to 5-8%

   Optimal pressing moisture is 5-8%. Above 10% causes low yield and mold risk; below 4% causes excessive friction and brittle cake. Test moisture every batch.

3. Step 3

   3 · Roast (hot) or warm gently (cold)

   Hot route: roast 160-180°C in flat-bottomed woks or drum roasters until moisture drops to 3-5% and color turns golden. Cold route: warm ≤60°C or crush at ambient. Record roast temperature per batch.

4. Step 4

   4 · Load the hydraulic press by a fixed rule

   Standard barrel 390 × 800 mm holds ~100 kg; model 325 uses 14 partitions. Hot cycle 30-40 min, cold cycle 60-90 min. System pressure 60 MPa, 2.2 kW motor — the same hydraulics across the range; only frame strength and pressure stability differ.

5. Step 5

   5 · Filter crude oil immediately

   Plate-frame filtration at 200-300 mesh right after pressing. Crude oil clarity target: sediment ≤0.1%, moisture ≤0.2%. Filtering warm oil promptly avoids sediment settling and flavor drift.

Key parameters

Real peanut numbers to size the line

Every figure below comes from the production spec, not a generic catalog. Use them to sanity-check any quote.

Avoid rework

Mistakes the press gets blamed for — but that belong upstream

• Skipping aflatoxin testing: one contaminated batch can destroy an entire export shipment. Color sorter or manual picking is not optional for food-grade oil.
• Mixed kernel size and drifting moisture: the press is blamed for low yield that actually comes from inconsistent feed.
• Using cold-press claims for hot-route oil: hot-pressed oil is fragrant and practical, but it is not cold-pressed — mislabeling risks brand and compliance problems.
• Sizing only the press: shelling, roasting, filtration, and cake handling must match its throughput, or the press sits idle waiting on a bottleneck elsewhere.

Strong front-end preparation and aflatoxin control remove most arguments about machine size that are really feedstock problems.

Why hydraulic

Why a hydraulic press suits peanut oil — and what stays constant across the range

Peanut kernels are soft, high-oil (44-56%) seeds that release oil readily under steady pressure, which is exactly what a hydraulic press delivers: a slow, even squeeze that protects flavor instead of the high-shear heat of a screw press. Across the peanut oil line team range — model 300, 325, 355, and up to 500 — the hydraulic system is the same: 60 MPa system pressure driven by a 2.2 kW motor, mechanical high- and low-pressure relief valves (not solenoid valves), carbon-steel partition plates between cakes (not filter cloth), and twin pressure gauges whose needles should always read together. What changes between models is frame strength and pressure stability; the core hydraulics carry over unchanged. So pick the frame to suit the route: a 300-325 ton frame is matched to the faster, lower-pressure hot cycle (30-40 min, 80-100°C), while a 355-500 ton frame absorbs the higher mechanical stress of the cold cycle (60-90 min, ≤60°C) without deforming over years of use. A correctly sized press keeps its frame true, holds pressure steady, presses out more oil, and lasts longer — the four things that actually decide cost per ton of oil. Picking a bigger model than the route needs wastes capital; picking a smaller one than the cold route demands shortens its life.

Project boundary

What to confirm before scoping Peanut Oil Press Process Guide

Peanut Oil Press Process Guide 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.