Super-B SQ40 Continuous-Flow Grain Dryer

The Super-B SQ40 is the flagship model in the SUPER-B Energy Miser SQ Series — the largest continuous-flow grain dryer Brock manufactures under the Super-B name. With 815 bushels of holding capacity, a 40-foot 10-inch grain column, the same 50 HP fan as the SQ36, and the largest published BPH ratings in the lineup, the SQ40 is engineered for the very largest commercial drying operations across North America.

The SQ40 is the model selected when nothing smaller will do. Major regional grain elevators, the largest custom drying businesses, major prairie operations exceeding 15,000 acres, and large commercial seed plants are the typical SQ40 buyers. At this scale, the dryer is no longer one piece of equipment supporting an operation — it’s the central operating asset around which significant infrastructure and revenue is built.

For the largest commercial drying installations in Saskatchewan, Alberta, Manitoba, Ontario, and beyond — where peak throughput, fuel efficiency, and operational reliability directly determine business viability — the SQ40 represents the maximum capacity available in the SQ Series before stepping into Brock’s separate Tower Dryer product line for elevator-scale capacity.

SQ40 Configuration Choice — D, E, A, or M

The SQ40 is offered in four standard configurations defined by the letter suffix after the model number. All four share identical grain column dimensions, holding capacity, and core drying technology — the differences are in drying mode capability and fuel-efficiency features.

SQ40D — Full Heat (Single Zone)

Continuous-flow full-heat operation with one temperature throughout the column. Grain leaves the dryer hot and is cooled in-bin afterward. Lowest capital cost in the SQ40 frame — though “lowest cost” is a relative term at flagship scale.

Best for: The very rare SQ40 buyer with extensive in-bin cooling capacity and single-crop focus. Uncommon at SQ40 commercial scale where mode flexibility almost always matters.

SQ40E — Continuous Flow with Louvers

Adds adjustable cooling louvers enabling three drying modes: full heat, pressure heat / pressure cool, and pressure heat / vacuum cool. Considered when the A configuration’s heat-recovery isn’t specifically prioritized.

Best for: Large commercial operations specifically prioritizing slightly lower capital cost over fuel-recovery — rare at SQ40 scale.

SQ40A — Continuous Flow with Hot Air Return Duct (Functionally Required)

Adds the hot air return duct for heat recovery — Super-B’s “Energy Miser” feature delivering up to 20% lower fuel consumption during continuous operation. At SQ40 flagship scale, the A configuration is functionally required for any operation planning long-term ownership. Annual fuel consumption at this size is enormous — the 20% savings deliver $30,000–60,000+ per year in operating cost reduction, paying back the configuration premium within 1–2 harvest seasons. No SQ40 commercial operation should plan multi-year ownership without the A configuration.

Best for: All major commercial drying operations, the largest prairie farms, regional grain elevators, and any SQ40 buyer planning multi-year ownership.

SQ40M — Two-Temperature-Zone

Uses two distinct temperature zones for full-heat or pressure-heat / pressure-cool drying. Designed for the highest-throughput operations needing precise temperature staging.

Best for: The largest commercial seed-grade producers, major pulse processors handling premium-grade product at flagship throughput, and largest specialty grain operations where temperature control directly affects grade-out and crop value at maximum volumes.

Key Specifications

Specification	Value
Series	SUPER-B Energy Miser SQ Series
Configuration	Single-module continuous flow
Total Fan HP	50 HP
Auger Load HP	10 HP
Chain Unload HP	2 HP
Column Length	40′ 10″
Overall Length	52′ 8″
Overall Height	14′ 2″
Total Holding Capacity	815 BU
Configurations Available	D (Full Heat), E (Louvers), A (Energy Miser), M (Two-Zone)
Fuel	LP or Natural Gas
Burner	Brock full flame-wall with stainless steel baffles
Blower	Double-width, double-inlet centrifugal (standard)
Grain Column	Variable-width (narrower top, wider bottom)
Outer Skins	18-gauge stainless steel perforated
Unloading	EVENFLO drag-chain conveyor
Standard Controls	QUANTUM or SPECTRUM
Optional Controls	INTUI-DRY 15.6″ touchscreen with remote access
Plenum Door	42″ × 22″ vertical access with safety shutdown switch

Drying Capacity by Crop and Mode

All capacities below are wet bushels per hour. Standard reference (corn 25.5%→15.5%) is published by Brock for cross-model comparison. Prairie crop capacities vary with grain temperature, ambient temperature, fines content, and crop maturity.

Corn Capacity (Manufacturer Standard Reference)

Mode	Moisture Removal	Capacity (BPH)
Full Heat – Single Zone (Model D)	25.5% to 15.5% (10 points)	1,153
Full Heat – Single Zone (Model D)	20.5% to 15.5% (5 points)	1,905
Modified Full Heat – Single Zone (Models M, E, A)	25.5% to 15.5%	1,107
Modified Full Heat – Single Zone (Models M, E, A)	20.5% to 15.5%	1,829
Pressure Heat – Two-Zone (Model M)	25.5% to 15.5%	1,043
Pressure Heat – Two-Zone (Model M)	20.5% to 15.5%	1,710

Approximate Prairie Crop Capacity (Practical Estimates)

Crop	Moisture Removal	Approximate Capacity (BPH)
Hard Red Spring Wheat	16% → 14.5% (1.5 points)	3,950–5,050
Wheat	18% → 14.5% (3.5 points)	2,250–3,000
Canola (crush grade, 82°C max)	12% → 8% (4 points)	1,750–2,350
Canola (seed grade, 45°C max)	12% → 8% (4 points)	870–1,250
Oats	16% → 14% (2 points)	2,750–3,700
Yellow Peas	18% → 16% (2 points)	2,100–2,750

These prairie-crop estimates are derived from the published corn ratings and typical efficiency factors for each crop. Always confirm capacity for your specific crop, moisture differential, and ambient conditions with your dealer before sizing.

Fan & Heater Configuration

The SQ40 runs a single 50 HP centrifugal blower — the same fan rating as the SQ36, applied to a longer column. The double-width, double-inlet centrifugal blower design provides:

• Significantly lower noise than axial fans found on most competitors
• Maximum static pressure capability for consistent airflow through the SQ40’s 40′ 10″ column — the longest in the SQ Series
• Best-in-class energy efficiency at the SQ40’s drying capacity for centrifugal designs

The 50 HP fan rating is shared with the SQ36, and at the SQ40’s longer column, the fan operates closer to its design ceiling. This means SQ40 operators need to be especially attentive to factors that elevate column resistance — fines accumulation, screen condition, grain compaction — because the fan has less reserve capacity than on the SQ36 with its shorter column.

The trade-off, common to all centrifugal-blower SQ Series units, is that the fan can ice up in extreme cold (typically below approximately –17°C). At SQ40 flagship scale, this becomes a more significant operational consideration because the dryer’s annual run-time is so high that ice events are statistically more likely. Most SQ40 commercial installations include supplementary inlet heating — discuss with your dealer during planning.

The Brock full flame-wall burner with stainless steel baffles distributes heat evenly across the SQ40’s longest grain column. The plenum is engineered to maintain uniform plenum temperatures from front to back across the full 40′ 10″ length — an engineering achievement at this column dimension. Operators report uniform grain quality from end to end of the discharge, which directly affects grade-out at high throughput.

The SQ40 is configured for either liquid propane (LP) or natural gas (NG) at order. For SQ40 flagship commercial operations drying 200,000+ bushels per season, natural gas is essentially the only economically viable choice if available at the yard. Annual fuel cost differences at this scale frequently exceed $40,000–80,000+ per season — easily justifying very substantial natural gas connection investments and even motivating utility infrastructure projects to bring gas service to previously unconnected commercial yards.

Grain Column & Holding Capacity

The SQ40 features Super-B’s variable-width grain column in its longest 40′ 10″ configuration — the maximum column length in the SQ Series. The geometry follows the same principle as smaller SQ Series models — narrower at the top for efficient moisture removal, wider at the bottom for better dwell time — applied across the longest practical column for sustained high-throughput operation.

Total holding capacity: 815 bushels — the maximum in the SQ Series. This includes the perforated wet garner bin at the top, the active grain column, and the discharge zone. The wet garner pre-warms incoming grain using exhaust heat from the lower drying chambers — at SQ40 flagship throughput, the recovered pre-heating energy is itself a significant fraction of total drying input.

Stainless steel perforated outer skins (18-gauge) are standard. With proper maintenance, stainless skins typically outlast every other component on the dryer. At SQ40 commercial scale, the skin assemblies represent very substantial capital value — proper care directly affects the dryer’s 25–30+ year design service life. Most SQ40 commercial operations include skin condition inspection in their annual professional service contracts.

For drying canola or other small grains at SQ40 flagship throughput, the small grain screen option is essential. The SQ40’s enormous canola throughput means rapid potential for screen plugging from canola fines — active screen management during canola drying campaigns, including frequent mid-shift inspections at peak production, is mandatory commercial practice on SQ40 installations.

Loading, Unloading & Metering (EVENFLO System)

The SQ40 uses Super-B’s patented EVENFLO drag-chain unloading system scaled for flagship commercial throughput operation.

Loading: A 10 HP top auger (same as SQ36) feeds wet grain from your wet bin into the SQ40’s perforated wet garner. At SQ40 flagship throughput, the loading auger is sometimes operating at sustained maximum capacity — most SQ40 installations include redundant feed systems, oversized wet bins, or dedicated wet bin elevation infrastructure to ensure feed reliability never bottlenecks the dryer during peak operation. The cost of feed-system downtime at SQ40 throughput is enormous.

Unloading via EVENFLO: A slow-moving drag-style chain conveyor at the base of the dryer powered by a 2 HP variable-speed AC motor. On the SQ40’s longest 40′ 10″ column, the EVENFLO advantages over conventional metering-roll systems are not optional — they’re operationally critical:

• Even unloading across the longest column length — eliminates flow imbalance that would be catastrophic on the SQ40’s column at peak throughput
• Gentler grain handling at flagship throughput — kernel damage stays low even at 1,900+ BPH, where alternative systems show substantial damage
• Debris-tolerant — SQ40 operations handle massive volumes of variable-cleanliness grain
• Easier between-crop cleaning — at SQ40 scale, between-crop downtime measured in hours represents thousands of dollars in lost throughput; the EVENFLO’s clean-out advantage is real revenue protection
• Consistent metering — chain speed control delivers reproducible exit moisture even at peak flagship throughput

For commercial drying operations switching between wheat, canola, oats, and pulses on the same machine, the EVENFLO’s clean-out advantage at SQ40 scale represents very substantial revenue protection through reduced changeover time during the limited harvest window.

Operating Modes

The SQ40 supports continuous-flow drying with mode capability dependent on configuration:

Full Heat (D, E, A, M configurations) — Maximum drying intensity. Grain exits the dryer hot and is cooled in-bin. Highest published BPH ratings in the SQ Series — 1,905 BPH on corn at 5-point removal. Best for high-throughput drying with substantial in-bin cooling capacity.

Pressure Heat / Pressure Cool (E, A, M configurations) — Cooling air pushed through the lower portion of the column. Grain exits cooled and ready for direct binning. The most-used mode on flagship commercial operations because it eliminates in-bin cooling complexity at maximum volumes.

Pressure Heat / Vacuum Cool (E, A configurations) — Cooling air pulled through the lower column via vacuum. Different airflow characteristics than pressure cool.

Two-Zone Pressure Heat (M configuration only) — Hotter top zone for moisture removal, cooler bottom zone for finishing and grain protection. Used for sensitive crops at flagship commercial throughput.

For most commercial SQ40 buyers, the A configuration with pressure cool mode delivers the best operating economics — the fuel savings on a heavy-use SQ40 directly offset the configuration premium in 1–2 harvest seasons.

Transport & Installed Dimensions

Dimension	Value
Overall Length	52′ 8″
Overall Height	14′ 2″
Overall Width (varies by config)	Approximately 10′ 10″
Total Fan HP	50
Auger Load HP	10
Chain Unload HP	2

The SQ40 is exclusively a fixed installation. At 52′ 8″ overall length and the very substantial infrastructure requirements, relocation is essentially impossible — SQ40 installations are permanent commercial infrastructure designed for the dryer’s full multi-decade service life and the operational business plan that justified the investment.

Concrete pad requirement: The SQ40 requires a heavily reinforced concrete pad designed for the dryer’s substantial operating weight plus full grain load across the 52′ 8″ length. Pad engineering must address distributed loading, soil conditions, frost heave protection, seismic considerations in some regions, and access for service equipment. Engineered pad design by a structural engineer is required — and explicitly required by provincial building codes for commercial installations of this scale.

Three-phase electrical service: Required and typically requires major service capacity. The 50 HP fan motor, 10 HP loading auger, and supporting auxiliary loads draw very significant amperage. SQ40 buyers should engage their provincial utility very early in installation planning — utility service upgrades costing $40,000–100,000+ are common at SQ40 installation projects in rural locations, and lead times for utility infrastructure can exceed 6–12 months in some cases.

INTUI-DRY Controls and Remote Monitoring

Like all current SQ Series dryers, the SQ40 supports two control system options:

QUANTUM or SPECTRUM Controllers (Standard) — Brock’s standard electronic dryer controllers covering all operating modes, plenum temperature setpoints, moisture targeting, and basic diagnostic logging.

INTUI-DRY Controller (Optional Upgrade — Required at Flagship Scale) — A 15.6-inch full-color touchscreen system with intuitive management of all dryer functions and remote smartphone access.

For SQ40 flagship operations, INTUI-DRY upgrade is required infrastructure:

1. Downtime cost at SQ40 scale is catastrophic. A 4-hour fault response on a 1,900+ BPH unit means very substantial lost throughput. Remote monitoring catches faults in minutes.
2. Multi-shift operations at SQ40 scale require INTUI-DRY’s profile management and operator handoff capabilities. Single-operator manual management is essentially impossible at flagship throughput.
3. Season-over-season optimization through INTUI-DRY’s data logging delivers very meaningful efficiency gains at the SQ40’s enormous annual volumes — even 0.5% improvements translate to many thousands in fuel savings.
4. Multi-customer commercial operations require INTUI-DRY’s per-customer tracking and reporting capabilities for billing accuracy and service quality documentation.
5. Fleet management for operations running multiple SQ Series dryers requires INTUI-DRY’s networked monitoring.

Optional Equipment

Beyond the standard configuration, the SQ40 supports several factory and dealer-installed options:

Small Grain Screen — Smaller perforations for canola, mustard, and other small grains. Reduces maximum throughput on standard crops by approximately 20%.

MOISTURE EQUALIZER System — A patented Brock option that moves the hottest and driest grain through the dryer faster, improving drying uniformity. Highly valuable on the SQ40 because the longest column has the greatest potential for moisture variation top-to-bottom at flagship throughput.

INTUI-DRY Touchscreen Upgrade — Required at SQ40 commercial scale.

Heat-Recovery Hot Air Return Duct (A configuration) — Up to 20% fuel savings during continuous operation. On the SQ40, the per-season fuel cost reduction typically pays back the configuration premium in 1–2 years for operations drying 200,000+ bushels annually. This is the single fastest payback on any equipment investment most commercial operations will encounter.

Reversing Cooling Louvers (E, A, M configurations) — Adjustable cooling louvers for fine-tuning the cooling air volume.

Service Access Catwalks and Platforms — Required for safe operation and maintenance access. The SQ40’s largest size means very substantial catwalk and ladder requirements — catwalk infrastructure on SQ40 installations is a major engineering and capital project, frequently $20,000–60,000+ depending on configuration and provincial workplace safety requirements.

Pneumatic Discharge System Compatibility — Essentially universal on Canadian SQ40 installations. Walinga Ultra-Veyor or comparable pneumatic distribution systems move dry grain to multiple bins at speed compatible with the SQ40’s flagship throughput.

Supplementary Fan Inlet Heating — Standard practice on commercial SQ40 installations operating in cold prairie conditions. Mitigates centrifugal fan icing in extreme cold and extends late-season operating window.

Redundant Loading and Discharge Systems — Standard practice on commercial SQ40 installations. Single-point failures during peak harvest at SQ40 throughput represent very substantial revenue exposure — most installations include backup capability throughout the grain handling system.

Best Applications for the SQ40

The SQ40 fits a very specific operational profile for the largest commercial operations.

Best fit for the SQ40:

• The largest prairie operations exceeding 15,000 acres
• Major commercial drying businesses serving multiple regional contracts
• Mid-to-large grain elevators handling regional drying capacity at flagship throughput
• Major pulse processing operations
• Largest seed plants where flagship throughput matters
• Operations replacing aging large-frame commercial dryers from any manufacturer
• Yards with substantial three-phase electrical service, professional engineering support, and committed multi-decade capital plans

Best fit for the SQ40A (Energy Miser — required):

• All SQ40-class operations drying 200,000+ bushels per season
• All major commercial drying businesses
• All long-term ownership scenarios at SQ40 scale

Best fit for the SQ40E:

• The very rare buyer with specific reasons to defer fuel-recovery infrastructure
• Operations with planned short ownership horizons (very rare at this scale)

Best fit for the SQ40M:

• Major commercial seed-grade canola producers at flagship scale
• Largest pulse processors handling premium-grade product
• Major malting barley operations

Less suitable for:

• Operations where the SQ36 already meets demand — the SQ40’s substantial capital cost premium isn’t justified by the additional 8% throughput
• Operations needing capacity beyond what the SQ40 delivers — Brock’s separate Tower Dryer product line addresses elevator-scale capacity above the SQ Series ceiling
• Yards without major three-phase service capacity for the 50 HP fan motor and 10 HP loading auger
• Operations that cannot justify SQ40 capital cost through actual drying volumes

How the SQ40 Compares to Adjacent Models

SQ40 vs SQ36: The SQ36 has a 36′ 9″ column versus the SQ40’s 40′ 10″, with the same 50 HP fan, same 10 HP loader, and 734 BU holding versus 815 BU. Drying capacity in corn at 5-point removal increases from 1,761 BPH (SQ36) to 1,905 BPH (SQ40) — about 8% more. The capital cost difference is meaningful, but the throughput difference is modest. The SQ40 is the right choice specifically when an operation consistently uses 1,800+ BPH and needs maximum available capacity. For most large commercial operations, the SQ36 hits the right balance and the SQ40’s additional 8% throughput isn’t worth its capital cost premium.

SQ40 vs SQ32: The SQ32 is meaningfully smaller — 654 BU holding, 40 HP fan, 32′ 8″ column. Corn drying capacity at 5-point removal is 1,601 BPH on the SQ32 versus 1,905 BPH on the SQ40 — about 19% more on the SQ40. The SQ32 fits typical large commercial operations; the SQ40 is appropriate only for the very largest commercial scale where SQ32 capacity is consistently insufficient.

SQ40 vs Brock Tower Dryers: When SQ40 capacity is insufficient, the next step is Brock’s separate Tower Dryer product line — different equipment architecture entirely, designed for elevator-scale capacity that exceeds what any SQ Series unit delivers. Tower Dryers represent very substantial additional capital and infrastructure investment compared to the SQ40 — they’re appropriate only when SQ40 capacity is genuinely insufficient.

Frequently Asked Questions

What’s the difference between the SQ40, SQ40E, SQ40A, and SQ40M? All four are the same SQ40 model with different drying mode capabilities. SQ40D is full heat only, SQ40E adds louvers for pressure cool modes, SQ40A adds the heat-recovery duct for fuel savings (Energy Miser — required at flagship scale), SQ40M provides two-temperature-zone operation. The A configuration is functionally required for any operation planning long-term ownership at this scale.

Is the SQ40 a portable or fixed dryer? The SQ40 is exclusively a fixed installation. At 52′ 8″ overall length and the associated infrastructure requirements, relocation is essentially impossible.

What’s the holding capacity of the SQ40? 815 bushels total — the maximum in the SQ Series, including the wet garner bin, active drying column, and discharge zone.

How much grain can an SQ40 dry per hour? Manufacturer-published capacity in corn is 1,905 BPH at 5-point moisture removal (Model D, full heat) and 1,153 BPH at 10-point removal — the highest BPH ratings in the SQ Series. For prairie crops, capacity varies significantly: wheat at 1.5-point removal can run 3,950-5,050 BPH, while seed-grade canola at 4-point removal at the 45°C temperature limit may run 870-1,250 BPH. Always confirm capacity for your specific scenario with your dealer.

Why is the A (Energy Miser) configuration required at SQ40 scale? At SQ40 flagship scale, annual fuel consumption is enormous — the 20% savings from the heat-recovery hot air return duct translate to $30,000–60,000+ per year in operating cost reduction. The configuration premium typically pays back in 1–2 harvest seasons. Skipping the A configuration at SQ40 scale rarely makes economic sense for any operation planning multi-year ownership.

Is the SQ40 the largest grain dryer Brock makes? The SQ40 is the largest model in the Super-B SQ Series. For capacity beyond the SQ40, Brock’s separate Tower Dryer product line addresses elevator-scale drying needs with different equipment architecture. The SQ40 represents the practical upper limit of single-module continuous-flow drying technology.

Does the SQ40 require special infrastructure planning? Yes — extensively. SQ40 installation projects typically involve professional engineering, structural pad design, utility service upgrades (often $40,000–100,000+), redundant grain handling systems, comprehensive catwalk infrastructure, and multi-month installation timelines. Most SQ40 buyers engage their dealer 12–18 months before planned commissioning to address infrastructure requirements properly.

Does the SQ40 handle canola at flagship throughput? Yes — with the small grain screen option and proper temperature management (45°C maximum for seed grade, 82°C maximum for crush grade per Canola Council guidelines). At SQ40 throughput, active screen management during canola drying campaigns is essential — including frequent mid-shift inspections at peak production, often by dedicated personnel.

What fuel does the SQ40 use? LP (liquid propane) or natural gas (NG), selected at order. For SQ40 flagship commercial operations drying 200,000+ bushels per season, natural gas is essentially the only economically viable choice if available at the yard. Annual fuel cost differences at this scale frequently exceed $40,000–80,000+ per season — easily justifying very substantial natural gas connection investments.

How long does an SQ40 last? With proper maintenance, current SQ Series units are designed for 25–30+ year service life. At SQ40 commercial scale, professional service contracts and rigorous preventive maintenance are mandatory practice — the cost of unplanned downtime far exceeds proactive maintenance investment, often by an order of magnitude.

What financing is typical for an SQ40 purchase? At SQ40 capital cost levels — including infrastructure — total project investment frequently exceeds $500,000+ CAD. Structured commercial equipment financing through Farm Credit Canada, ATB Financial, major Canadian banks, or manufacturer-supported financing is standard. Lease-to-own and operating lease arrangements are common at this scale, particularly for commercial drying businesses where revenue cycles support structured payments. Multi-bank competitive bidding for financing is standard practice.

Should I buy an SQ40 or step up to a Tower Dryer? Choose the SQ40 when its capacity (1,900+ BPH in corn at 5-point removal) is what your operation needs and the single-module SQ Series architecture fits your installation plan. Choose a Brock Tower Dryer when SQ40 capacity is genuinely insufficient — typically for major elevator operations or commercial drying businesses with throughput requirements exceeding what any SQ Series unit delivers. Tower Dryers represent very substantial additional capital and infrastructure investment.

Is the SQ40 right for our farming operation? For most prairie farms — including very large ones — the SQ40 is more capacity than the operation actually needs. The SQ24, SQ28, or SQ32 better fit most prairie farming profiles. The SQ40 is appropriate specifically for commercial drying businesses, regional grain elevators, and the very largest farming operations (typically 15,000+ acres) where flagship throughput is consistently used.

Related Models in the SQ Series

• Super-B SQ28 — 572 BU holding, three-combine prairie operations
• Super-B SQ32 — 654 BU holding, large commercial entry point
• Super-B SQ36 — 734 BU holding, very large commercial operations
• Brock Tower Dryers (separate product line) — for capacity beyond the SQ Series

For complete buying guidance — sizing math, crop-specific operation, used vs. new pricing, and how Super-B compares to GSI, Vertec, and Neco — read our Super-B grain dryers buyer’s guide.

Browse all grain dryers on Aglist to compare across manufacturers.

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