VERTEX CO., LTD.

OVERVIEW

Vee-Lok tube fittings are designed to provide a leak-proof connection and applied in chemical, petrochemical, oil refineries, shipbuilding, power generation, pulp and paper industries. The double ferrule design is a mechanism used for sealing and gripping tubing. Through the mechanical advantage and geometry, the tube fitting can overcome the variations in materials, wall thickness and hardness to provide an excellent seal performance.

The tube fitting consists of four parts: body, front, back ferrules and nut with silver-plated to prevent galling.

FEATURES

When the nut is tightened, the back ferrule is driven against the tapered rear of the front ferrule. The front ferrule is driven by force into the tapered mouth of the fitting body and creates a primary tubing seal. The back ferrule consistently grips the tube to hold the fitting and tubing firmly in place while the front ferrule forms a full –faced seal on the tapered surface of the body. In the twin-ferrule tube fitting design, the back and front ferrules move axially instead of a rotary motion. No Torque is transferred to the tubing during installation.

Two ferrules are optimized to provide sealing and tube gripping functions.
The front ferrule creates a seal:

against the fitting body
on the tubing outside diameter.

As the nut is tightened, the back ferrule:

axially advances the front ferrule
radially provides an effective tube grip.

INSTALLATION INSTRUCTION


Make sure all components have been assembled in correct order as shown above.	Firmly insert the tubing into the fitting assembly until the tubing is fully bottomed on the shoulder inside the fittings. Finger tighten the nut.	Mark the nut at position no. 1 to facilitate counting the number of turns. When holding the body of the fitting with a wrench to prevent body from turning, tighten the nut with another wrench 1.1/4 turns to position no. 2