The Hydraulic 50/50 System

The Best of Both Worlds

The patented, hydraulically operated 50/50 Door and Window System (Patent No. 9,567,789) combines the best features from our SST-II Bi-Fold and Single Swing Systems. The 50/50 provides an incredibly clean opening, requires minimal exterior space in the open position, maximizes clear opening height, and requires no maintenance, making it perfectly suited for architectural, commercial, and residential designs.

Why Hydraulic 50/50?

Hydraulically Operated

The use of hydraulic cylinders eliminates counterweights, cables, locking mechanisms, pulleys, springs, etc., providing a clean panel face, free from obstruction.

Clean and Clear

The cylinders are positioned vertically and, along with the hoses, are hidden entirely within our jamb housings. The result is a wonderfully clear opening from one space to the next.

Maintenance Free

The 50/50 System is maintenance-free. There are no hinges or rollers and all pivot points utilize maintenance-free bearings.

Remote Power

The power unit may be located anywhere in the building, thereby providing customers with quieter operation, and contributing to a cleaner look.

All Steel Construction

Narrower steel profiles allow for more glass volume and greater visibility.


  • Maintenance-free!
  • Shipped powder-coat finished. A full array of standard, non-standard, and custom colors are available, with few exceptions.
  • Manual lowering system in case of power failure
  • Built-in locking mechanism maintains system securely in closed position
  • Full perimeter weather seals
  • Integral mounting frame to limit loads on the structure
  • No floor track is required – Nothing to impair movement through the opening
  • When open the system forms a partial awning providing protection from the weather and sun


Motor/Power Unit

The motor/power unit may be located anywhere within the building – Close proximity to the hydraulic door or window is not necessary.

Motor Power Unit 1
Motor Power Unit
Controls 1
Controls 2


Choose from a standard up/down, 2-button, or key control for system operation. A weather-resistant control is also available. All controls are constant contact.


Infrared photo eyes or a lead-edge sensor are available, to either stop, or stop and reverse the motion of the door or window. Optional warning horn and strobe light indicate system operation.

Safety 1
Safety 2

Remote Operation

Remote Transmitters offer ease of entry upon approach. Transmitters are constant contact. For safety reasons, we require either photo eyes or a lead-edge sensor with remote transmitters.


For turn-key products, we offer our glass retainer system (glass stops) and a variety of dual or single pane glazing options. All factory-supplied glass is laminated for safety. Customers may also elect to provide a virtually unlimited number of inserts such as polycarbonate, steel or wood, to name just a few.

Cladding 1
Cladding 2
Spray Booth


Crown Doors finishes each of our projects right here, in factory, using our state-of-the-art powder-coat facility, and our custom-design mantra follows through to our finish options as well – A full array of standard, non-standard, and custom colors are available, with few exceptions. We maintain a small list of customer-favorite colors as “standards,” though virtually any “non-standard” or entirely custom finish options are available (may affect cost and lead time).

Additionally, projects may be manufactured from stainless steel, available for corrosive environments (seaside or pool house installations). Stainless systems may be powder-coated as well.

Our standard color chart may be viewed here.