Dorma BTS75VH Single Acting Concealed Floor Door Closer for for Wood or Steel Door and Frame

Yes. The BTS75V has a compact body specifically so it can go into thin slab concrete subfloor construction where a larger floor closer body will not fit. That is the usual reason this closer gets specified over a full-size floor closer: the pour depth decides it before anything else does. If you have the depth and you are working an offset-hung door in a deep reveal, the Norton Rixson 127 Series is the heavy duty 3/4 inch offset floor closer for that condition instead.

You order handing on the BTS75VH, left hand or right hand. The BTS75V closer body itself is non-handed and works single or double acting, but the H configuration is ordered as a single acting closer with the hand specified, so establish the hand from the outside of the door before you place the order. Hold open is a separate choice: none, 90 degree, or 105 degree, and hold open only makes sense in the direction the door swings.

Spring power is adjustable from size 1 through size 4, so one closer covers a wide range of door weights and widths rather than locking you to a fixed size. It is a Grade 1, heavy duty, commercial closer built to keep working under rough weather and heavy traffic. Adjusting spring power in the field is what lets you tune it after the door is hung, which matters on an entrance where wind load fights the closer.

No. The BTS75V floor closer is not ADA compliant, so do not put it on an opening that has to meet accessible opening force. Spring power adjusts from size 1 to 4, which covers barrier-free and non barrier-free settings, and there is a barrier free option to specify when you order, but the closer itself is not carried as ADA compliant. If the opening is on an accessible route, verify the closer you choose is listed for it before you commit.

Four things get chosen on the order: handing (left or right), hold open (none, 90 degree, or 105 degree), barrier free (yes or no), and finish for the exposed cover plate. Finishes are 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome. Get the handing and hold open right first, since those are the two that make the closer wrong for the opening rather than just mismatched.

Yes, that is handled with the spindle. The BTS75V takes a wide selection of interchangeable spindles so the closer suits virtually any floor covering or threshold application. The spindle length is what takes up the finished floor build-up, so measure from the top of the cement case to the finished floor surface, tile, carpet and underlayment, or threshold height included, and pick the spindle from that, not from the slab.

The Norton Rixson H28 Series concealed floor closer is the nearest peer by rating: it is a heavy duty, Grade 1 concealed floor closer, matching the BTS75VH's heavy duty Grade 1 classification. The difference is the hanging method the opening is built for. The H28 is made for offset-hung doors, while the BTS75VH is a single acting concealed floor closer for wood or steel door and frame with a wide selection of interchangeable spindles to suit the floor covering or threshold. If your door is center-hung on the BTS75V spindle, stay with the BTS75VH; if the door hangs on an offset pivot, the H28 is built for that geometry.

Hold open is built into the closer if you order it that way, at either 90 degrees or 105 degrees. You can also order it without hold open. Pick 90 for a door that stops square against a wall or a stop, 105 where you want the leaf back further out of the traffic path. Hold open is not field-added later, so it is decided at order time.

Yes, mechanical backcheck is built into the BTS75V. That cushions the door near the end of the opening swing so wind or a hard push does not drive the leaf into whatever is behind it. On an exterior entrance that is the feature that keeps the door and the frame from getting beaten up.

They mount the door differently. The BTS75V is a center hung style floor closer with a compact body that suits shallow slabs, non handed, Grade 1, heavy duty, with spring size 1 to 4 adjustment. The Norton Rixson 127 Series and 20 Series are 3/4 inch offset hung closers, where the pivot sits off the door edge; the 20 Series gives 180 degree door swing and is standard duty rather than heavy duty. If the door is already prepped offset hung, an offset closer is the match; swapping between the two means re-prepping the door and the case.

The Norton Rixson 20 Series 3/4 inch offset hung floor closer is the standard duty option in the group, and it carries a 180 degree door swing capability. The Dorma BTS75VH is heavy duty and Grade 1 with adjustable spring power from size 1 through 4, so one body covers both barrier free and non barrier free openings. Note the 20 Series is an offset hung unit, so it is a fit only where the door hangs on an offset pivot rather than on the BTS75V spindle.

No. The Norton Rixson 25 Series cement case is a heavy duty galvanized steel construction case, the box that gets set into the floor, not a closer body. The Dorma BTS75VH is the floor closer itself, a single acting concealed unit for wood or steel door and frame, ordered by handing, finish, hold open and barrier free option. If you are pricing a full floor closer for the opening, the 25 Series cement case does not replace it.

Two in the group carry a stated Grade 1: the Dorma BTS75VH single acting concealed floor closer and the Norton Rixson H28 Series concealed floor closer for offset-hung doors. Both are also classified heavy duty, and the Norton Rixson 25 Series cement case is likewise Grade 1 and heavy duty. For standardizing across a facility, the BTS75VH is commercial rated and is non-handed in the sense that the same body serves single and double acting doors, with spring power adjustable from size 1 through 4 so one model covers a range of door weights.

The Norton Rixson 20 Series is the unit in the group described with 180 degree door swing capability, on a 3/4 inch offset hung door, at standard duty. The Dorma BTS75VH is the heavy duty Grade 1 choice and is offered with no hold open, 90 degree hold open, or 105 degree hold open, in left or right hand. Match the swing requirement first, then the duty level: if the door must swing to 180 degrees on an offset pivot, the 20 Series is built for it; if the traffic calls for heavy duty and the hold open point is 90 or 105 degrees, the BTS75VH is the fit.

The BTS75V is a commercial closer, heavy duty and Grade 1 certified. It is built for storefront, institutional and high traffic entrances, and installing it means cutting a cement case into the floor. For a house door it is far more closer, and far more floor work, than the opening calls for.

Five: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome. Those are standard BHMA finish numbers, so 626 satin chrome matches satin chrome pulls and pivots on the same opening and 613 matches oil rubbed bronze trim. Only the cover plate shows once the closer is in the floor, so match it to the door hardware, not the floor.

The Dorma BTS75VH is offered in 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 625 bright chrome, and 626 satin chrome, so the exposed cover can be matched to the rest of the openings in a building. The Norton Rixson 25 Series is a cement case in galvanized steel construction, which is buried in the floor rather than seen. If finish matching drives the selection, the BTS75VH is specified by finish alongside handing, hold open and barrier free.

Both are 3/4 inch offset floor closers. The 127 Series is heavy duty and is described for deep reveal applications; the 20 Series is standard duty and is described with 180 degree door swing capability. They are the offset-pivot alternatives to a Dorma BTS75VH, which is a single acting concealed floor closer for wood or steel door and frame in heavy duty Grade 1.