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A= Fixing centre to frame 25mm
B = Fixing centre to sash 19mm
C = Min frame width required 38mm


For use on timber recessed frames
Stylish design and simple to adjust to accommodate different steps
Adjustable body - no need for packers
Suitable for top hung opening out windows.
Tested to over 100,000 cycles.
150mm throw, folding action to open and close sash
Over centre design means that the opener 'locks' securely into place when the window is closed

The link bar will divide the opening gap in half which means that the opening will effectively become approximately 75mm which is well within the guidelines for second storey and higher windows
A minimum sash height of 250mm is required where butt hinges are fitted or 400mm where friction hinges are used
One, two or three openers may be required depending on the size of the window
Single opener for sash width up to 500mm
Two openers plus link bar for sash width 600mm to 900mm
Three openers plus link bar for sash width 900mm to 1500mm
300mm, 600mm, 900mm, 1000mm and 1200mm link bars available depending on sash width
We recommend that the link bar is 2/3 to 3/4 of the sash width
Link bar can be easily cut to exact size required
Centre ring (STRX02) may be used to enable a pole operator to be used 
Pole operator for high level windows (X028) available in 1, 1.5 or 2m length
Pole operators are not recommended for windows above 3m from finished floor level or where windows are in a deep reveal

Ordering Information

Part code - STRDU0120
Description - Duoflex opener recessed silver
Pack size - 30 (can be supplied in any quantity)

Part code - STRDU0125
Description - Duoflex opener recessed white
Pack size - 30 (can be supplied in any quantity)

Part code - STRDU0101
Description - Duoflex opener recessed black
Pack size - 30 (can be supplied in any quantity)

Part code - STRDU0143
Description - Duoflex opener recessed polished brass
Pack size - 30 (can be supplied in any quantity)

Part code - STRDU0144
Description - Duoflex opener recessed satin stainless steel plated
Pack size - 30 (can be supplied in any quantity)

Other sizes and finishes available to special order

Specification Information

STRDU01 suitable for timber recessed frames

Top hung outward opening windows

Sash width up to 1500mm (one, two or three openers can be used depending on sash width)

Two or Three Openers can be used together with a link bar 

Link bar should be 2/3 to 3/4 sash width

Fitting Instructions


Tested to over 100,000 operations

Patent approved GB24902896

12 month warranty

Our Product Range

How we can help

We sell our products through selected wholesalers and architectural ironmongers. We have experts on hand to help architects and end users with product information but orders would need to be placed with our distributors and they will also give pricing information. If you aren't sure where to buy we can provide details of nearest distributor.

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Our catalogues and fitting instructions can all be downloaded here. If there is something you cannot find please let us know and we will be happy to email it to you.

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Where to buy/Contact Us

For details of your nearest distributor or for further information on any of our products please contact us by phone or email.

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Strand hardware LTD

We supply high quality Window and Door Hardware for commercial buildings as well as our range of locally manufactured products; we are sole UK distributors for top European manufacturers such as Athmer Automatic Door Seals and Antipanic Panic Hardware. We have built our reputation by delivering first class customer service and technical support which is provided through our experienced industry professionals.


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