BI-Lok Series D Dual Ferrule Tube Fittings are composed of four precision machined component parts: The fitting body, front ferrule, back ferrule and nut. These fittings are shipped fully assembled and individually bagged.

BI-Lok Tube Fittings are designed, manufactured and inspected to the rigid quality requirements of the ISO certified production facility. These fittings have been tested and certified to a variety of Global International Industry standards.

All stainless steel fittings are Heat/Lot code traceable.

Fitting Operation

Once the tubing has been fully inserted into the fitting, a leak tight seal is achieved through the simple action of tightening the nut against the fitting body. The tightening of the nut provides the axial thrust required to engage the captively held ferrules against the outside diameter of the tubing. The staged swaging action of the ferrules, with minimal torque transfer to the tubing during make-up, provides the key to BI-Lok’s high integrity sealing capability and exceptional service life.

Tube Selection

The selection of the proper tubing is essential to both the performance and safety of a tubing system. The variables – system pressure, media, flow operating temperature and environmental conditions – should all be given careful consideration. Similar materials should be used together (i.e. stainless steel fittings with stainless steel tubing, brass fittings with copper tubing). In order to achieve proper fitting make-up, the tubing must be softer than the fitting material.

Stainless Steel Tubing – Fully annealed seamless or welded tubing produced to ASTM A269, and A213 (seamless) or A249 (welded) is recommended. The tubing hardness should not exceed Rockwell B-90.

Copper Tubing – Seamless or soft annealed ASTM B-75 compliant or seamless soft annealed Type K or Type L water tubing to ASTM B-88 is recommended.

Care should be taken that all tubing is reasonably straight and cut in a manner to create smooth square ends, free of burrs. Handling practices should that surface scratches on the tube O.D. may be a potential source of leaks.

Interchangeability

BI-Lok tube fittings are manufactured to be totally “interchangeable” with the Swagelok® tube fitting. Piece by piece examination reveals that the two brands are totally intermixable.

The exceptional quality standards of both products assure complete reliability of service when intermixing the component parts.

* Swagelok® is a registered trademark of the Swagelok® Company

BI-Lok Catalog