One-Lok_Catalog - HAM-LET FRANCE - #3

ONE-LOK

To ensure the installation of safe, leak-free systems, it is important to choose the appropriate ONE-LOK single ferrule for your application. ONE-LOK fittings are engineered to the highest standards.

The table below lists tube sizes, which have been tested to bursting pressure with both maximum and minimum wall thickness. Correctly assembled ONE-LOK fittings were installed and no leaks or other failures were noted at the connection points. If you plan to use tubing with different wall thicknesses than those noted in this

chart, please contact the HAM-LET Technical Department for advice regarding the appropriate working pressure. Note: Use fully annealed, high-quality stainless steel tubing of ASTM A269 or equivalent standard.

Working pressure: Based on laboratory and field tests using ASTM A269 tubing with a safety factor of 4:1 in a metal tempreture range of -20° to +100°c. However, it is the customer's responsibility to ensure safe product selection that is based upon the total system design and function.

Annealed 304 or 316 stainless steel tubing meeting ASTM A213, A269 or equivalent specifications, based on ultimate tensile strength of 75,000 psi (5167 bar), for metal temperatures from -20°F - 100°F (-29°C - 37°C).

Suggested ordering information: Fully annealed, high-quality (Type 304 or 316) stainless steel hydraulic tubing ASTM A269 or A213 or equivalent, seamless or welded and drawn with a hardness of Rb90 or less. Tubing should be without scratches and suitable for flaring and bending.

ONE-LOK connections may be disconnected and remade repeatedly, without loss of leaktight seal.

1. Before disconnecting, mark the position of the nut in relation to the fitting body.

2. To reassemble, use a wrench to tighten nut to original position.

3. Tighten slightly with wrench until a slight rise in torque is felt.

Two different methods can be used to cut tubes

1. Tube cutter

2. Hacksaw

To attain a leak free connection, the tubing must be cut squarely. A good quality tube cutter with the appropriate blade for the tubing material is recommended. Do not try to reduce the time of cutting by taking deep cuts with each turn of the cutter. This will work harden the tube.

The end of the tube must be deburred to avoid damage to the fitting and to ensure that the tube reaches the bottom of the fitting.

In order to cut the tube with a hacksaw and get square ends, the tube must be cut with guide blocks.

This method of cutting necessitates deburring of the tube ends.

Do not hold the tube in a vise in the place where it will be inserted into the fitting (the vise will leave a mark on the tube that may cause leaks, and might cause ovality).

Scratches on the tube might cause leaks. It is therefore, important to handle the tube carefully to reduce the risk of leaks.

1. Tubes must not be dragged on the floor.

2. Tubes must not be dragged out of a tubing rack, especially in case of large OD tubes.

1. Insert the tubing

into the ONE-

LOK fitting. Check

1/4" 1 1/4

that the tube rests firmly on the fitting

1/2

shoulder and that

the nut is finger

tight.

3/4 1 11

2. Tighten the nut. 1-1/4 turns of the

1/2

nut is required for 1/4" (6 mm) and

higher (See Figure A). 3/4 turns of the nut is required for 1/8" (See Figure B).

ON E- LO K fitting part numbers are constructed from symbols that identify the type of material and size of the fitting.

Fitting type 33 = Stainless Steel Tube O.D. 1/4 NPT

(male connector) The O.D. size is always the first to be

described.

The ONE-LOK part numbering system is the same as our LET-LOK Tube Fittings with the exceptionthat you add an "H" between the prefix number and the "L" to designate the one, ferrule design.

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