Custom-built to your staircase. Patented Advanced Swivel & Leveling keeps you level through every turn. Fits 90°, 180°, spiral, and multi-story.
The Flow X is built around Access BDD's patented Advanced Swivel & Levelling technology — the only stair lift on the market where the seat rotates while the lift is in motion, both going up and going down.
Because the seat can rotate through turns, the Flow X installs on staircases as narrow as 610mm (24") — the tightest fit in the industry.
Manages staircases significantly steeper than most curved lifts on the market, which typically max out at 55–60°.
The seat continuously adjusts to keep you at the safest angle as the rail curves.
Rack-and-pinion drive with a 350-watt motor and soft start/stop, matched to a rail manufactured for your exact staircase.
| Weight capacity | 275 lbs (125 kg) |
|---|---|
| Drive system | Rack-and-pinion with 350-watt motor |
| Minimum staircase width | 610mm (24") — narrowest fit in industry via ASL |
| Maximum incline | 72° — industry-leading for curved lifts |
| Rail | Custom-built anodized aluminum, single-rail; up to 112' with multi-parking stations |
| Travel speed | 19.7 feet per minute |
| Swivel technology | Patented Advanced Swivel & Levelling (ASL) — auto-swivel during travel |
| Seat | Ergonomic contoured with 5° recline; adjustable to 4 height positions |
| Footrest | Adjustable to 5 positions, anti-slip surface, linked to seat |
| Armrests | Wrap-around ergonomic with patented angular armrest detection |
| Folding style | Choose fully automatic folding seat, automatic folding footrest, or manual (with integrated gas spring) |
| Power | 120–240 VAC standard outlet; 24V DC battery (two 12V batteries) |
| Battery backup | Multiple round trips during power outage; emergency lowering function standard |
| Controls | Integrated joystick in armrest (folds away) + two wireless remote controls |
| Seat belt | One-handed operation retractable with detection system |
| Safety systems | 360° perimeter safety, anti-entrapment sensor, top over-run facility, emergency lowering |
| Installation | Fits either left or right side of staircase; mounts to stairs, not wall |
| Certifications | ASME A18.1-2023, CSA B355:2024, EN 81-40:2020, Machinery Directive 2006/42/EC |
| Design partnership | Pearson Lloyd |
| Manufactured by | Access BDD, a division of TK Elevator |
The lift itself — chair, carriage, motor, drive system
Custom-built rail, engineered to your exact staircase
Integrated armrest joystick, folds away
Two wireless remote controls
One-handed retractable seat belt with detection system
Battery backup system, pre-installed
Professional installation by factory-trained technician
On-site operation training
Lifetime warranty activation
programmable with up to 3 phone numbers for emergency contact
motorized seat rotation at landings
13 fabric colors, plus vinyl and premium leather options
4 standard colors (Stone Grey, White, Pale Brown, Dark Brown) or RAL color matching
furniture-grade back panel for a decorative touch
for multi-story installations
We measure your staircase and give you a real quote on the spot.
30 minYour rail is engineered to your exact staircase by Access BDD, the TK Elevator division behind the Flow X.
4–6 weeksFactory-trained technician installs and calibrates the lift.
4–6 hrsOperation and safety training for you and your household.
Same dayYour 24/7 line and warranty are active from day one.
Day oneA quick look at how our four lifts compare.
| Lift | Staircase | Capacity | Drive system | Special feature | Made in | Best for |
|---|---|---|---|---|---|---|
| Nautilus Premium Stair Lift | Straight | 350 lbs | Grease-free worm | Narrowest fold (10.5") | USA | Standard straight stairs |
| Nautilus Heavy Duty Stair Lift | Straight | 600 lbs | Grease-free worm | 600 lb capacity | USA | Heavier users, straight stairs |
| Flow X Curved Stair Lift | Curved | 275 lbs | Rack & pinion | ASL auto-swivel | International | Narrow, spiral, or steep curved staircases |
| Harmar CSL500 Helix Curved | Curved | 350 lbs | Rack & pinion | True-Curve rail | USA (Sarasota, FL) | Curved staircases, US-made preference |
Yes. The Flow X is custom-manufactured to match your exact staircase, whether it has 90° turns, 180° turns, spiral configurations, or multiple stories. The rail can be built up to 112′ with multi-parking stations, and the incline capability of up to 72° means it handles even very steep staircases.
ASL stands for Advanced Swivel & Levelling. It’s a patented Access BDD technology that lets the seat rotate while the lift is in motion — both going up and going down. This is what allows the Flow X to fit staircases as narrow as 24″ (610mm), because the seat can turn to navigate tight bends. No other stair lift on the market has this capability.
After the on-site assessment, your rail is engineered and manufactured to match your staircase by Access BDD, the TK Elevator division behind the Flow X. Typical turnaround from approved quote to installation is 4–6 weeks. Installation itself takes about 3 hours.
Yes. The Flow X comes with 4 standard rail colors (Stone Grey, White, Pale Brown, Dark Brown) and 13 upholstery colors, plus vinyl and leather options. You can also choose an optional Grey Oak wood-finish back for a more furniture-like appearance. Customization choices are made during your assessment.
The Flow X runs on 24V battery power at all times, with the standard outlet just providing the charge. A fully charged battery gives you multiple round trips during a power outage. The lift also includes a standard emergency lowering function.
Traditional Medicare (Part A/B) does not cover stair lifts. Some Medicare Advantage plans, long-term care insurance policies, VA benefits, and state Medicaid waivers may contribute toward the cost. We can walk through your options during your free assessment.
Our lifetime warranty is tied to the original purchaser at the original installation address, which is the industry standard. Because the Flow X is custom-built to a specific staircase, relocating it typically requires either significant rail modifications or a new custom rail — we can quote those options separately.
In their own words
Two customers on what changed the day their lift went in.
"It's very easy to use."
— Nautilus customer
"It's great. [Installation] was very quick!"
— Nautilus customer
A 30-minute visit gets you a measured stairway, a fixed price, and no obligation.
Call (801) 421-3299Restoring freedom, one stair at a time.