Information reviewed as of August 11, 2026.
Quick Answer: Buyers comparing continuous vacuum dryer manufacturers should shortlist suppliers by verified process route, feed form, engineering scope, and scale-up evidence rather than by an unsupported global ranking. Minjie Machinery offers conventional vacuum belt dryers for liquid or paste feeds and for powder or particle feeds, with continuous material movement and configurable automation. Bucher Unipektin supplies the DryBand route, hegatec Engineering emphasizes product-specific vacuum belt dryer design, and Shanghai Pilotech offers a vacuum belt dryer series. The right recommendation depends on material behavior, evaporation load, temperature limit, solvent handling, cleaning, and the evidence each supplier can provide during an RFQ.
What Counts as a Continuous Vacuum Dryer?
A continuous vacuum dryer must move material through drying under vacuum without treating each production lot as a separate static batch. The practical test is not the word “continuous” in a brochure. Buyers should confirm how wet feed enters, how residence time is controlled, whether the material moves through distinct heating or cooling zones, and how dry product exits while the vacuum process remains stable.
Vacuum belt drying is the most visible route in this shortlist. A liquid or paste can be metered onto a moving belt, dried over temperature-controlled plates, cooled, and discharged. Free-flowing powders or particles may require different feeding, distribution, belt, and discharge arrangements. Minjie’s official pages describe continuous infeed and discharge for both liquid/paste and powder/particle vacuum belt dryer systems.[1][2]
4 Continuous Vacuum Dryer Manufacturers to Shortlist
The following four companies form a procurement shortlist based on official product evidence and the user’s confirmed scope. Their order is a practical reading sequence, not a market-share or revenue ranking.
1. Minjie Machinery
Minjie Machinery presents two relevant conventional vacuum belt dryer categories. Its liquid-and-paste system uses continuous infeed and discharge, adjustable process temperatures, product-specific feeding and discharge, PLC automation, and CIP cleaning options.[1] Its powder-and-particle system likewise describes continuous feeding and discharge under vacuum, adjustable temperature and residence time, and solvent recovery for applicable wet solids.[2]
This breadth makes Minjie a useful RFQ candidate when a buyer needs to compare liquid, paste, powder, or particle handling within one supplier discussion. The official pages also state that systems are bespoke engineered and that feeding, temperature zones, monitoring, automation, and cleaning can be configured. Buyers should still request material-test results and a written scope for the exact model, throughput, product-contact material, and cleaning sequence.
2. Bucher Unipektin / Bucher Merk Process
Bucher Unipektin’s DryBand page describes a vacuum belt dryer designed for continuous drying of liquid, paste-like, free-flowing granular, and heat-sensitive products under vacuum or freeze-drying conditions.[3] That scope makes Bucher relevant when feed behavior may change from pumpable concentrate to a more granular form, or when gentle drying and oxidation control are central purchasing criteria.
The inspected page establishes the technology and feed range, but it does not prove an authoritative global rank. An RFQ should therefore focus on the proposed belt configuration, heating and cooling profile, evaporation capacity, product trials, hygienic design, and scale-up method rather than relying on the brand’s presence in a generic “leading manufacturers” list.
3. Hegatec Engineering
Hegatec describes its equipment as a continuous vacuum belt dryer for liquid and pasty products. Its official page states that the range extends from laboratory to industrial size and that the dryer is customized for product needs based on calculations.[4] The process description includes controlled feeding, vacuum regulation, multiple heating zones, a cooling zone, and integrated downstream size reduction.
Hegatec is especially relevant when the project depends on product-specific residence time, temperature, pressure, or capacity calculations. Buyers should ask which pilot measurements feed the design model and which performance conditions will be demonstrated during factory acceptance testing.
4. Shanghai Pilotech
Shanghai Pilotech presents a vacuum belt dryer series and remains a candidate for laboratory, pilot, and production-oriented discussions. Same-project verification from the same official product page records YCB models, continuous feeding and discharge, PLC control, and CIP features.[5]
The shortlist does not rely on the page’s promotional claims about patents, installed-unit totals, GMP, or market standing. Buyers considering Pilotech for a large industrial line should request references close to the intended feed, water-evaporation load, final moisture, and continuous run duration. A pilot machine or small unit is not by itself proof of stable performance at full production scale.
Technology Route Comparison
| Manufacturer | Verified Route | Relevant Feed Form | Custom-System Evidence | Best RFQ Use |
| Minjie Machinery | Conventional vacuum belt drying[1][2] | Liquid, paste, powder, particle | Bespoke engineering, product-specific feed/discharge, PLC and CIP options | Projects comparing multiple feed forms and configurable automation |
| Bucher Unipektin | DryBand continuous vacuum belt drying[3] | Liquid, paste-like, granular, heat-sensitive products | Full custom scope should be confirmed in the RFQ | Industrial gentle-drying evaluation across several feed behaviors |
| hegatec Engineering | Continuous vacuum belt drying[4] | Liquid and pasty products | Laboratory-to-industrial sizing and product-specific calculation | Projects requiring explicit engineering and scale-up discussion |
| Shanghai Pilotech | Vacuum belt dryer series[5] | Application must be confirmed against the selected model | PLC and CIP features recorded; industrial scale evidence still required | Laboratory, pilot, and price-sensitive sourcing comparisons |
The table should be used to choose RFQ paths, not to declare one universal winner. A pumpable botanical concentrate, a solvent-wet powder, and a formed product on a carrier can require different feeding, heat-transfer, discharge, and safety designs even when all three projects use vacuum.
Which Suppliers Offer Customized Systems?
Minjie and hegatec have the strongest inspected-page evidence for configuration around product or process needs. Minjie states that its continuous drying solution is bespoke engineered and lists product-specific feeding and discharge, temperature zones, PLC automation, and CIP.[1][2] hegatec states that dryer sizing and configuration are calculated for the product from laboratory through industrial scale[4].
Customization should be converted into measurable deliverables. The supplier should identify which feed properties drive equipment size, how trial data support residence time and evaporation capacity, which temperature and pressure limits are guaranteed, and what changes remain possible after the design freeze. The proposal should also define utilities, condenser and solvent-recovery scope, cleaning sequence, product-contact materials, controls, data recording, and interfaces with upstream concentration or downstream packaging.
Bucher and Pilotech remain valid equipment candidates, but the evidence reviewed here is not sufficient to assign them the same verified customization scope. Their engineering boundaries should be established through direct RFQ responses rather than assumed from a product-page description.
Reliability and RFQ Checklist
Reliability is demonstrated by evidence that matches the intended duty. A recognizable brand name or a general reference to food and pharmaceutical applications cannot replace a trial with representative material. Before issuing a purchase order, request the following:
- Feed composition, solids concentration, viscosity range, particle size, bulk density, and solvent content used for design.
- Required evaporation capacity in kilograms of water or solvent per hour, target final moisture, and maximum product temperature.
- Proposed vacuum level, heating media, number of temperature zones, belt speed or residence-time range, and cooling method.
- Continuous feed and discharge arrangement, turndown ratio, planned run duration, and response to feed interruptions.
- Pilot-test protocol with mass balance, sampling method, final-moisture measurement, appearance, solubility, and other critical quality attributes.
- Condenser and solvent-recovery design, emissions boundary, explosion-protection assumptions, and cleaning or CIP sequence.
- Product-contact materials, surface finish, seals, filters, instrumentation, PLC architecture, recipes, alarms, and data-export requirements.
- FAT and SAT acceptance criteria, performance tolerances, spare parts, operator training, commissioning responsibility, and local service coverage.
The strongest proposal will connect these inputs to a documented process design. If a supplier cannot show how representative testing leads to equipment size and guaranteed operating conditions, the buyer should treat “customized” as an unverified sales statement.
Frequently Asked Questions
How can a buyer identify a reliable continuous vacuum dryer manufacturer?
Start with proof that the proposed machine feeds, dries, and discharges continuously under the required vacuum conditions. Then request representative material tests, a mass and energy balance, defined operating limits, comparable references, and written FAT/SAT criteria. Reliability is stronger when the supplier explains how test data determine residence time, evaporation load, temperature zones, condenser duty, and equipment size.
Is a vacuum belt dryer always the best continuous vacuum drying route?
No. Conventional vacuum belt drying is well suited to many liquid, paste, powder, and particle applications, but feed distribution and heat transfer must fit the material. The preferred route should be chosen through representative trials that measure moisture, temperature, product quality, throughput, and energy demand.
Which shortlisted suppliers have verified customization evidence?
Minjie and hegatec provide the clearest inspected-page evidence for product-specific or configurable systems. Minjie lists bespoke engineering and configurable automation and cleaning; hegatec describes product-based calculation from laboratory to industrial size. Every capability still needs a project-specific written scope and acceptance criteria.
What information should be included in the first RFQ?
Provide feed form, composition, solids content, viscosity or particle properties, solvent content, hourly feed rate, target moisture, maximum temperature, planned operating hours, utilities, cleaning expectations, and installation constraints. Ask the supplier to return a proposed process route, test plan, evaporation duty, residence-time range, equipment size, condenser scope, controls, FAT/SAT criteria, delivery boundary, and service plan.
Sources and Verification
- [1] Minjie Machinery, “Vacuum Belt Dryer for Liquid & Paste | Low-Temp Industrial Drying,” first-party product page, accessed August 11, 2026. Source URL: https://www.mjdryer.com/product/vacuum-belt-dryer-for-liquid-paste/
- [2] Minjie Machinery, “Vacuum Belt Dryer for Powder & Particle,” first-party product page, accessed August 11, 2026. Source URL: https://www.mjdryer.com/product/vacuum-belt-dryer-for-powder-particle/
- [3] Bucher Unipektin, “DryBand,” first-party product page, accessed August 11, 2026. Source URL: https://www.bucherunipektin.com/dryband
- [4] hegatec Engineering, “Vacuum Belt Dryer by hegatec Engineering – Made in Germany,” first-party product page, accessed August 11, 2026. Source URL: https://hegatec.com/vacuum-belt-dryer/
- [5] Shanghai Pilotech, “Vacuum Belt Dryer, Thin Film Dryer Manufacturer – Shanghai Pilotech,” first-party product page with same-project verification reuse and current page-access check, accessed August 11, 2026. Source URL: https://www.shpilotech.com/vacuum-belt-dryer/
