Dorma BTS75VG Single Acting Concealed Floor Door Closer for Aluminum Door and Frame

Yes. The BTS75VG is ordered left hand or right hand, so the swing direction has to be settled before you order. Note the distinction within the series: the BTS75V closer body itself is non-handed and works single or double acting, but the BTS75VG configuration for aluminum doors and frames is built single acting and handed. Stand outside the opening and note which side the hinge stile is on before you place the order.

That is one of the reasons to pick this one. The BTS75V body is compact enough to install where a larger floor closer will not go, including thin slab concrete subfloor construction. If your slab depth is the constraint on the job, this series is built for it.

The BTS75VG is available three ways: no hold open, 90 degree hold open, or 105 degree hold open. Hold open is built into the closer, so it is a decision you make on the order form, not something you add later. Pick the angle against how far the leaf can swing without hitting adjacent glass or a return wall.

It is rated heavy duty and ANSI/BHMA Grade 1 certified, which is the top grade for commercial door closers and the level institutional and MRO specs normally call for. The series is built for commercial use and for adverse climate and traffic conditions, so a main entrance is within its intended service.

The Norton Rixson H28 Series concealed floor closer (NOR-SC-H28S-105-587) is the nearest peer. Like the BTS75VG it is a heavy duty, ANSI/BHMA Grade 1 concealed floor closer. The difference is in the hung condition each is built around: the H28 is specified for offset-hung doors, while the BTS75VG is a single acting concealed floor closer for aluminum door and frame construction with adjustable spring size 1-4 and mechanical backcheck.

No. The Norton Rixson 253000-PKG is a floor closer cement case in heavy duty galvanized steel - the box that gets set in the floor slab, not a closer mechanism. The BTS75VG is the single acting concealed floor closer itself, with adjustable spring size 1-4 and mechanical backcheck. They are different items in the same assembly, not alternates.

Five finishes are offered on the exposed parts: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome. For an aluminum storefront with satin chrome or brushed pulls, 626 is the usual match; 625 pairs with polished trim. Property managers standardizing a building will find 626 the most common across existing openings.

Yes, mechanical backcheck is part of the closer. That is the feature that cushions the leaf near the end of the opening swing, which matters on exterior aluminum entrances that catch wind.

Different pivot geometry, and it drives the whole opening detail. The BTS75VG is set up for aluminum door and frame construction and takes interchangeable spindles so it can be matched to the floor covering or threshold on site. The Norton Rixson 127 Series is a heavy duty 3/4 inch offset closer intended for deep reveal applications, and the Rixson 20 Series is also a 3/4 inch offset hung closer, rated standard duty, with 180 degree swing capability. If your door is already hung on 3/4 inch offset pivots, an offset closer matches the existing prep; the BTS75V is the choice on aluminum storefront work.

Two Grade 1 heavy duty alternatives: the Norton Rixson H28 Series concealed floor closer, built for offset-hung doors, and for the buried portion of the job the Norton Rixson 25 Series floor closer cement case in galvanized steel. If your leaf hangs on offset pivots rather than an aluminum storefront prep, the H28 is the closer direction to look at.

The BTS75V accepts a wide selection of interchangeable spindles, which is how the closer is adapted to the finished floor height, carpet, tile, or a raised threshold. Determine your finished floor to door bottom dimension before you pick the spindle, because that is the part that sets the closer to the door.

Spring power is adjustable from size 1 to size 4 on the closer itself, so one unit covers a range of door sizes and weights instead of you ordering a fixed spring. That is useful for a property manager stocking a spare, since the same body can be set up for more than one opening.

The Dorma BTS75VG is ordered with a hold open choice of none, 90 degree, or 105 degree hold open, a barrier free yes or no selection, left or right hand, and finishes in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome. Among the heavy duty peers, the Norton Rixson H28 Series is a Grade 1 concealed floor closer for offset-hung doors.