Dorma BTS75VB Double Acting Concealed Floor Door Closer for Wood or Steel Door and Frame

Yes. The BTS75V is non-handed and works on both single acting and double acting doors, so a door that swings in and out off a center-hung pivot is a normal application. Because it is non-handed there is no left or right version to specify, which also makes it easier to stock one unit for a building with mixed swings.

Barrier free refers to how the closer is set up for reduced opening force on accessible openings. The BTS75V has adjustable spring power from size 1 through 4, which covers both barrier-free and non-barrier-free doors from the same closer body. Note the closer itself is listed as not ADA compliant, so if your opening has to meet an ADA opening-force requirement, confirm the full door assembly against your local code before you commit.

One body covers the range. Spring power adjusts on site from size 1 to size 4, so a single BTS75V can be tuned to a light interior leaf or a heavier, wider entrance door. For a property manager standardizing across a building, that means fewer part numbers to carry and adjustment at the door instead of a reorder.

That is one of the cases it was built for. The BTS75V body is compact enough for installations where a larger floor closer would not fit, including thin slab concrete subfloor construction. It also takes a wide selection of interchangeable spindles so the closer can be matched to whatever floor covering or threshold height sits over the cement case.

Depends on the opening. The BTS75V is offered three ways: no hold open, 90 degree hold open, or 105 degree hold open. Use non hold open on any door that has to self-close every time, which includes doors in a fire or smoke separation. Pick 90 or 105 degrees where you want the leaf to stand open for deliveries, carts, or peak traffic, choosing the angle by how far the door can swing before it hits a wall or adjacent leaf.

It is a heavy duty, ANSI/BHMA Grade 1 certified closer intended for commercial use, with mechanical backcheck to stop the door being thrown open into a wall or a person. Grade 1 is the top commercial tier under the BHMA grading, which is what most institutional and MRO specs call for on an entrance.

The BTS75VB is a double acting concealed floor closer for wood or steel doors and frames, non-handed and suited to single and double acting openings. For a 3/4 inch offset hung door with a deep reveal, the Norton Rixson 127 Series is the heavy duty floor closer built specifically for that condition. Choose by how the door hangs: offset-hung deep reveal points to the 127, while a center-hung double acting opening points to the BTS75VB.

No - it is a different item in the same assembly. The Norton Rixson 253000-PKG is the 25 Series floor closer cement case, a heavy duty galvanized steel housing that gets set into the floor. The BTS75VB is the closer mechanism itself, a Grade 1 double acting concealed floor closer for wood or steel doors and frames. A cement case is not interchangeable with a closer body, and a case is matched to its own closer series rather than being universal, so do not order the 25 Series case expecting it to receive a BTS75VB.

The Norton Rixson H28 Series concealed floor closer (SC-H28S-105-587) is the closest cross-brand match on rating: like the BTS75VB it is a heavy duty, ANSI/BHMA Grade 1 concealed floor closer for commercial openings. The difference is the hanging method they are built around. The BTS75VB is non-handed and handles both single and double acting doors, with adjustable spring size 1 through 4 and mechanical backcheck. The H28 is built for offset-hung doors, so the door prep and pivot arrangement follow that geometry rather than the center-hung, double acting arrangement the BTS75VB is set up for. Confirm how the door is hung before treating one as a drop-in for the other.

Yes, the BTS75VB is set up for wood or steel doors and frames. Since the closer sits in the floor rather than on the door face or head, there is no closer body to mount to the leaf, which is why it suits wood doors and all-glass style entrances where face-mounted hardware is unwelcome. Spindle selection is what adapts it to the floor covering and threshold at your opening.

The trade is appearance and exposure against install cost. A surface closer mounts to the door or frame and can be swapped in an afternoon. The BTS75V hides in the floor, leaves the door head and face clean, and takes both swings of a double acting door, but it needs a cement case set in the slab, so it is a decision made at construction or during a floor renovation, not a quick retrofit. Its mechanical backcheck and Grade 1 heavy duty rating are aimed at entrances that see hard use.

Yes. The Norton Rixson 20 Series is a standard duty floor closer for 3/4 inch offset hung doors, rated for 180 degree door swing. The BTS75VB is a heavy duty, Grade 1 unit with adjustable spring power from size 1 to 4, which is what you want on high-traffic or wind-loaded entrances. On a lower-traffic interior opening that is offset hung, the 20 Series covers the duty cycle with a standard duty rating.

The BTS75VB is the one unit in this comparison group that is non-handed and rated for both single and double acting doors, with spring power adjustable from size 1 to 4 so the same body covers barrier-free and non-barrier-free openings. That lets one part number and one set of spare stock serve mixed openings. The Norton Rixson alternatives are tied to specific hanging conditions - the H28 to offset-hung doors and the 20 Series to 3/4 inch offset hung - so standardizing on them means matching each opening to the right series.

The BTS75VB is offered with a 105 degree hold open, a 90 degree hold open, or non-hold-open, in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome and 626 satin chrome. The Norton Rixson H28 heavy duty concealed floor closer is also configured at 105 degrees in the SC-H28S-105-587 build, but it is intended for offset-hung doors, so it suits a different hanging condition than the double acting BTS75VB.

Five finishes: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome. The finish applies to the exposed cover plate at the floor, since the closer body itself is buried in the cement case. Match the plate to the door hardware and thresholds already in the space. All five are available with 90 degree hold open, 105 degree hold open, or non hold open.