Centrifugal Dewatering Machine for Plastic Flakes

It is primarily designed for rigid plastic flakes such as PET bottle flakes and rigid HDPE or PP regrind. Soft PE or PP film usually calls for a different dewatering approach, such as a film squeezer.

For rigid flakes, outlet moisture is often around 2-3% under stable operating conditions. Actual performance depends on inlet moisture, flake size, rotor speed, screen specification, and maintenance condition.

Often yes. Centrifugal drying removes bulk free water efficiently, but many extrusion and high-spec applications still require a downstream thermal drying stage to reach lower final moisture targets.

The screen housing can be opened for cleaning, inspection, and replacement. Good screen condition is important for stable drainage and predictable outlet moisture.

Please share your material type, target throughput, typical flake size, inlet moisture, upstream washing stages, and whether a thermal dryer or extrusion system follows the machine.

A centrifugal dryer for a 1 ton/hour line typically uses a 45-90 kW motor. This is significantly less energy per kg of water removed compared to thermal drying, because water is expelled mechanically rather than evaporated. Combining centrifugal dewatering with a thermal dryer minimizes total energy consumption — see our centrifugal vs. air drying energy comparison for the calculations.

Centrifugal dryers are optimized for rigid flakes (PET, HDPE, PP). For plastic film, a film squeezer is recommended instead, as it simultaneously removes water and densifies the film. Some recycling lines use both a squeezer and a centrifugal dryer in sequence for maximum dewatering.

In the plastic recycling industry, “centrifugal dryer,” “spin dryer,” and “centrifugal dewatering machine” all refer to the same type of equipment. The machine uses a high-speed rotating screen drum to mechanically separate water from washed plastic flakes through centrifugal force.

Yes — they are the same machine. Recycling plants and equipment buyers use both terms interchangeably. “Centrifugal dewatering machine” emphasizes the mechanical water-removal function. “Centrifugal dryer” emphasizes the moisture-reduction outcome. Manufacturers also market them as plastic dryers, plastic dewatering machines, or spin dryers depending on the target market. The mechanical principle — high-speed rotor inside a perforated screen housing — is identical.

An industrial centrifugal dryer is used in plastic recycling lines to remove surface water from washed flakes before thermal drying or extrusion. Typical placement is after a friction washer or float-sink tank and before a hot-air dryer or pelletizer. For 1 ton/hour throughput, an industrial centrifugal dryer typically uses a 45–55 kW motor and reduces moisture from 30–40% (after washing) to 2–5% (ready for thermal finishing or direct extrusion of HDPE/PP, which tolerate higher moisture than PET).

A vertical centrifugal dewatering machine has a vertical rotor shaft and is more compact, suited for limited floor space and lower-capacity lines (400–800 kg/h). A horizontal centrifugal dewatering machine has a horizontal rotor with paddles that convey material along the screen — better for higher capacities (1,000–3,000+ kg/h) and continuous operation. Horizontal designs typically achieve more uniform dewatering on rigid flakes; vertical designs are easier to clean and service.

An industrial plastic dryer machine for recycling lines typically ranges from $8,000 USD (compact 400 kg/h, 37 kW model) to $35,000+ USD (heavy-duty 2,000 kg/h, 55 kW horizontal centrifugal dewatering machine). Final price depends on motor power, rotor diameter, screen specification, material of construction (carbon steel vs SS304), and optional features such as automatic discharge control or integrated dust hood. Request a quote with your throughput and material type for an accurate figure.