Assembly-by-Torque (AbT) Fittings
Assembly-by-Torque AbT Fitting
Offering reliable and repeatable assembly methods, the assembly-by-torque (AbT) fitting assembles quickly. Assembly to a pre-determined torque facilitates reliability and repeatability of fitting assemblies. In tight spaces, the AbT fitting can be assembled by hand, with no special tools required. For difficult-to-reach or confined space applications, preswaging prior to assembly eases installation and speeds up production.
Swagelok AbT fittings utilize a unique stop feature, known as a dynamic zone (patented), integrated into the highly-reliable, widely used, Swagelok tube fitting. In all sizes, the design controls axial displacement of the nut during assembly and disassembly.
AbT fittings feature a patented dynamic zone feature on the nut which provides a prescribed resistance, at a predetermined position, during the assembly-by-torque installation pull-up. These unique nut and ferrule sets can be assembled to standard Swagelok tube fitting bodies to create an assembly-by-torque tube fitting.
Features
■ Assembly by torque.
■ Sizes: 1/4 in., 3/8 in., 1/2 in., 6 mm, 8 mm, 10 mm, and 12 mm
■ Meets the requirements of NGV 3.1, ISO 15500, and ECE R110.
■ For use on standard fittings and valve bodies as well as AbT bulkhead bodies. (Not intended for use with standard bulkhead bodies.)
■ Visual confirmation on initial assembly.
The AbT fitting's design allows for fitting assembly and reassembly like a traditional tube fitting by using a torque wrench.
Fractional Tubing Material: 316/316L SS or 304/304L SS
|
Tube Size OD x Wall |
Initial Assembly Torque Allowable Range in.•lb (N•m) |
Reassembly Torque Allowable Range in.•lb (N•m) |
|
1/4 x 0.035 in. |
150 ± 13 |
150 ± 13 (17 ± 1.5) |
|
3/8 x 0.049 in. |
270 ± 14 (30.5 ± 1.5) |
350 ± 17.5 (39.5 ± 2) |
|
1/2 x 0.049 in. 1/2 x 0.065 in. |
540 ± 27 (61 ± 3) |
700 ± 35 (79 ± 4) |
Matric Tubing Material: 316/316L SS or 304/304L SS
|
Tube Size OD x Wall |
Initial Assembly Torque Allowable Range in.•lb (N•m) |
Reassembly Torque Allowable Range in.•lb (N•m) |
|
6 x 1 mm |
150 ± 13 |
150 ± 13 (17 ± 1.5) |
|
8mm x 1.0mm |
215 ± 11 (24 ± 1.25) |
280 ± 14 (31.5 ± 1.5) |
|
10mm x 1.0mm 10mm x 1.5mm |
360 ± 18 (40.5 ± 2) |
470 ± 23.5 (53 ± 2.5) |
|
12mm x 1.5mm |
660 ± 33 (74.5 ± 3.75) |
800 ± 40 (90.25 ± 4.5) |
Standardized Pre-assembly For Fast & Repeatable Final Installation
Pre-swaging tube fitting ferrules to the tube prior to assembly eases installation of tube fittings. After pre-swaging, the AbT fitting assembles quickly with commonly available torque tools, facilitating assembly in tight spaces.
1/4 and 6 mm size pre-swage tools
3/8, 1/2, 8mm, 10mm, and 12mm size pre-swage tools 
High-volume Swaging Unit (HVSU), available for all AbT sizes