Bakery Products
Proofs bread dough, burger buns, pizza dough, croissants, and Danish pastries while maintaining uniform yeast activity and surface moisture.
Continuous Proofer
Square’s continuous proofer provides automated fermentation for bread, burger buns, toast, croissants, pastries, and steamed buns.
Inside the stainless steel PIR insulated room, a gentle conveyor carries dough through a stable climate. PID valves hold temperature within ±1°C and humidity within ±3% RH for even yeast rise and smooth dough skin.
Closed loop PID temperature (±1 to 2°C) and humidity (±3% RH) regulation
Synchronized VFD conveyor drive for 15 to 90 minute proofing profiles
Clean upward opening rail design and automated CIP washdown
Product Features
Why Choose Square's Continuous Proofer
Tight temperature and humidity control, clean rail design, and smooth bakery line transfer.
Continuous Synchronized Transmission
Continuous conveying replaces manual rack pushing and batch proof rooms, connecting directly with dividers, moulders, and ovens.
Hygienic Upward Opening Track Design
The upward opening track catches any chain wear inside the rail channel so particles never fall onto dough on lower tiers.
VFD Control and Easy Adjustment
Variable speed drives (VFD) adjust proofing time from 15 to 90 minutes to match different dough recipes and room conditions.
Closed Loop PID Climate Control
Low velocity recirculation fans (0.3 to 0.8 m/s at product level) paired with PID modulated steam/mist and heating coils maintain uniform chamber conditions within ±1 to 2°C and ±3% RH.
Technical Specifications
Parameters
Standard specifications are listed below. We size belt or tray width, proofing time, climate control, and CIP cleaning for your bakery line.
| Configuration | Linear tunnel or multiple pass (serpentine) belt path |
|---|---|
| Belt system | Tray conveyor / Mesh belt / Plastic modular belt per product type |
| Proofing time | 15 to 90 min (stepless VFD adjustable, path length per requirement) |
| Temperature range | Ambient +5°C to 45°C (heating; optional 2 to 8°C cooling for retarding) |
| Humidity range | 70 to 95% RH (adjustable, ±3% RH control accuracy; temperature ±1 to 2°C) |
| Heating method | Electric finned elements / Steam coil / Hot water coil |
| Humidification | Clean steam injection / Ultrasonic mist / Atomizing spray nozzle |
| Air circulation | Low velocity recirculation fans, VFD controlled, 0.3 to 0.8 m/s at product |
| Enclosure | PIR insulated, stainless steel interior & exterior, fully welded floor |
| Control system | PLC touchscreen, recipe storage, line synchronization, VPN remote access |
| Cleaning | Automated CIP spray system / Manual washdown / Return path belt washer |
| Typical lead time | 14 to 18 weeks |
| Design life | 15+ years (structural); 8 to 10 years (belt & mechanical components) |
Design Details
How Each Subsystem Is Engineered
Open each section below to see how key parts of the proofer work.
Proofing Science & Climate Parameters
Final proofing needs steady temperature, humidity, and gentle air to support yeast rise:
- Temperature (30 to 38°C, ±1°C): Controls yeast speed. Too cool slows rise; too warm causes dough collapse.
- Humidity (75% to 90% RH, ±3% RH): Keeps dough skin soft so loaves expand without cracking or sticking to pans.
- Gentle Airflow (0.3 to 0.8 m/s): Low air speed prevents dry spots across all belt tiers.
Product Handling & Belt Systems
Conveying geometry is selected according to dough hydration and product format:
- Stabilized Tray / Pan Carrier Conveyor: Holds baking pans, tins, or peelboards completely level through vertical and horizontal turns; ideal for high volume pan bread, burger buns, and delicate pastries
- Stainless Steel Wire Mesh Belt: Conveys hearth rolls, bagels, or formed dough pieces directly on an open stainless steel spiral or tunnel belt
- Nonstick Modular Plastic Belt: Low adhesion food grade polymer links engineered for high hydration or sticky dough formulations
Humidification Technology Options
We match the humidification system to your steam supply and water quality:
- Clean Steam Injection: Filtered low pressure steam gives fast humidity response and clean sterilization
- Ultrasonic Mist: Creates fine 1 to 5 μm water mist with low power use
- Micro Mist Nozzles: High pressure spray nozzles with droplet catchers inside the air mixing duct
Integration with Automated Bakery Lines
The continuous proofer synchronizes upstream dough makeup with downstream baking:
- Upstream Makeup Interface: Receives panned or free standing dough pieces directly from dividers, rounders, intermediate proofers, and moulders
- Downstream Oven Transfer: Discharges proofed dough smoothly to scoring, seeding, or egg wash stations and directly into the continuous tunnel or spiral oven
- Master Line Speed Synchronization: PLC encoder feedback automatically adjusts proofer conveyor speed to match upstream makeup and oven baking rates
Retarding Capability (Optional)
Optional dual mode climate packages combine refrigerated dough retarding with heated final proofing in a single enclosure:
- Chilled Retarding Mode (+2°C to +8°C): Slows yeast fermentation for extended holding or multiple stage artisan dough development
- Automated Retarding to Proofing Transition: Programmable PLC recipes transition smoothly from cold retarding to warm humidified proofing
- Footprint Consolidation: Eliminates intermediate transfer handling between separate retarder and proofer chambers
Proven in These Food Applications
Chinese Pastry Products
Provides steady proofing for baozi, mantou, steamed buns, and fermented pastries on continuous lines.
Case Studies
Continuous Proofer in Operation Worldwide
Proven installations running in food plants around the world.
Continuous Proofer Installation: Bimbo Group
High automation continuous bakery proofer with PID temperature and humidity regulation supplied to Bimbo Group,
WEDOME Bakery: Pre Proofing and Freezing Line for Croissants
An automated croissant proofing and spiral freezing line installed at WEDOME's central bakery factory in
Frequently Asked Questions
Yes. Inside the insulated enclosure, our conveyor system moves dough smoothly while PID-controlled valves regulate humidity (75% to 90% RH, within ±1.5% to ±3%) and temperature (30°C to 48°C, within ±1°C to ±2°C) for consistent proofing across bakery products and pastries.
Yes. Continuous proofers are typically placed between the dough divider/moulder and the oven. They are designed for seamless integration with automated bakery lines.
Square holds ISO 9001, ISO 45001, CE, PED, ASME (U and U2 stamps), EAC, CSA, CRN, and CNAS laboratory accreditation, supported by 300+ patents, 300+ R&D engineers, and 300+ installation and service engineers.
We customize belt or tray width, tier count, proofing time, temperature and humidity range, PIR enclosure, and CIP cleaning to match your bakery line.
Our proofers include an automated CIP spray system, a return belt washer, and a welded sloped stainless steel drain floor to wash and dry the chamber between runs.
Engineering Inquiry
Discuss Your Continuous Proofer Project
Tell us your dough type and proofing time for a continuous proofer quote.
Our engineers reply within 24 hours. All project details are kept confidential.
