Frequently Asked Questions

A rotating variable-pitch screw inside a wedge-wire screen basket moves material from the inlet toward the discharge end. As the screw pitch decreases, material is progressively compressed. Liquid passes through the screen apertures under pressure and is collected below. The dewatered solid cake exits from the discharge port. No filter media, chemicals, or batch cycles are required in most applications.

A centrifuge uses high-speed rotation (typically 2,000–4,000 rpm) to separate solids and liquids through centrifugal force. It generally achieves lower output moisture but consumes significantly more energy, requires more maintenance, and is less suitable for fibrous or abrasive materials. A screw press operates at 2–20 rpm, uses 70–85% less power per unit of throughput for organic and agricultural materials, and handles fibrous materials (manure, spent grain, crop waste) far better. For most farm and food processing applications, the screw press is more practical and cost-effective.

Continuously. Material is fed from one end and discharged at the other without interruption. Many installations run 16–24 hours per day with automated feed pumps and minimal operator intervention. There is no warm-up, cycle, or reset procedure between loads.

It depends on particle size relative to the screw clearance and screen aperture. For material with solid particles larger than 25–30 mm, a pre-shredder or coarse screen upstream is recommended to protect the machine. Our team can advise on pre-treatment requirements when you share your material description.

The CTYZ series has been used with: food waste and kitchen waste; plant and herbal extract residue; pharmaceutical and medicine residue; paper pulp; vegetable waste; tea residue; fruit juice extraction residue; fiber materials; brewery and distillery grain; cow manure; and coffee grounds. If you have a specific material, share the approximate moisture content, particle size, and daily throughput requirement and we can confirm suitability.

Output cake moisture typically reaches 40–70% across all material types, with weight reduction of 60–80%. Exact values depend on feed moisture, screen aperture, back-pressure setting, and feed rate. We can share performance data from existing installations on similar materials upon request.

Our standard screen aperture is 0.75 mm - this is our recommended default for most materials. A 1.0 mm screen gives higher dewatering rates but more solids in the filtrate. A 0.5 mm screen produces cleaner filtrate but slightly lower dewatering efficiency. We adjust aperture based on fibre length and material characteristics, confirmed by test results.

The primary selection factors are: (1) daily throughput required (m3/h or tonnes/day), (2) material type and feed moisture content, (3) available power supply (voltage and frequency), and (4) available space. As a guide: CTYZ-160 for small farms up to ~3 m3/h; CTYZ-200 / CTYZ-300 for mid-scale operations (3–10 m3/h); CTYZ-400 / CTYZ-500 / CTYZ-600 for industrial or large farm applications (8–25+ m3/h). Contact us with your specific numbers and we'll recommend the right model - or the right combination of units for redundancy.

For materials with fibre length below 3 cm, no pre-treatment is typically required. For materials with fibre length exceeding 3 cm, we recommend pre-shredding or crushing. The more thorough the crushing, the higher the dewatering rate, the drier the discharged cake, and the better the overall result.

Yes. Multiple units with a shared feed pump and distribution manifold is a common configuration for higher capacity requirements or when redundancy is important. We can supply matched units and provide system drawings on request.

Yes. All models can be configured for any standard voltage and frequency. Please specify your local supply when requesting a quotation and we'll confirm motor, starter, and panel compatibility. Common configurations supplied include 220V/60Hz (North America/Japan), 380V/50Hz (Europe/Asia), 415V/50Hz (Australia/UK), and 460V/60Hz (North America industrial).

Yes. We supply OEM machines to equipment integrators, environmental solutions companies, and distributors who require machines under their own brand. Services include: custom nameplate and colour scheme, rebranded operation manual and technical documents, CE documentation under your company name (where applicable), and modified packaging. Minimum order quantities apply. Contact us for details.

Yes. Screen apertures are available in standard sizes from 0.25 mm to 2.0 mm. For specialised applications, non-standard apertures can be sourced. We will recommend the optimal aperture based on your material characteristics and target output moisture.

Standard models (CTYZ-200, CTYZ-300, CTYZ-400) are typically ready for shipment within 15–20 working days from order confirmation and deposit receipt. Custom configurations, larger models, or multi-unit orders may require 25–35 working days. The confirmed lead time is stated in writing on your order confirmation.

Machines are shipped by sea freight in standard 20' or 40' containers, or as LCL (less-than-container load) for smaller units. Export packaging is included: the machine is treated with anti-corrosion coating, bolted to a timber skid, and enclosed in a wooden crate or wrapped in protective film. We prepare all export documents including commercial invoice, packing list, bill of lading, and certificate of origin.

Standard terms are T/T: 30% deposit to confirm order, 70% balance before shipment. For established customers with repeat orders, extended terms may be available. All transactions are in USD.

All Chuantai screw press machines carry a 12-month warranty from the date of shipment, covering defects in materials and workmanship. Wear parts - including screen, seals, and bearings - are consumable items not covered under warranty but available as spare parts with fast dispatch. Extended service arrangements are available for larger orders.

Daily: check for unusual noise or vibration; clean the screen if visible blockage occurs (most materials self-clean). Weekly: lubricate bearing points per the maintenance schedule; inspect seals. Monthly: inspect screen basket for wear or damage; check gearbox oil level. Annually: replace bearings and seals if wear indicates it is time. We supply a full maintenance manual and a recommended spare parts list with every machine.

Yes. We provide a detailed installation and commissioning guide with every machine, and our technical team is available by WhatsApp or video call to support your commissioning process at no extra charge. For large projects or OEM customers, on-site commissioning visits can be arranged at cost.