Product Part Numbering Scheme:
TALU’s ferrule part numbers are set under tabs by fitting size and material type. The TABS for each size indicate the material. For ease in finding the ferrules you need, the part numbering scheme can assist you. The prefixTL-refers to polyimide ferrules. The first two numbers in the 5 digit suffix refers to the material type (i.e. 10 = 100% polyimide, 85 = 85% polyimide / 15% graphite, and 60 = 60% polyimide / 40% graphite. The third digit in the suffix refers to the fitting size (i. e. 6 = 1/16” fitting, 8 = 1/8” fitting and 4 =1/4” fitting). The last two digits refer to the ferrule ID—generally in MM and inches. The prefix 11 designates graphite and TF designates PTFE.
Until 2007 only one polyimide material was used to mold ferrules. In 2007 TALU brought to the market its polyimide ferrules made from TL-Polyimide®. Ferrules made from TL-Polyimide are available in composites of 100% polyimide, 85% polyimide / 15% graphite, and 60%polyimide / 40% graphite. TALU is the only ferrule manufacturer that offers all three composites. TALU is the only manufacture that offers all four standard sizes; 1/16” short, 1/16” standard, 1/8” standard, and 1/4”standard in all three composites (see below for more information onTL-Polyimide).
TALU uses only 100% graphite which is the purest and best graphite available on the market. No off-shore substitutes are used in our graphite ferrules. TALU offers, by far, the largest variety of graphite ferrules of any manufacturer along with many custom sizes.
TALU’s ferrules are designed to be used primarily in Swagelok fittings. Ferrule sizes go by the fitting designation, which is determined by the ID in the fitting. For example, a 1/16” ferrule actually has an OD of 1/8” (.125) but the largest ID is limited to 1/16” (.062). A 1/8” ferrule actually has an OD of 1/4”(.250) but the largest ID is limited to 1/8” (.125). A 1/4" ferrule has an OD of 3/8” (.375)but the largest ID is limited to 1/4”.
Straight vs. Reducing Ferrules:
The ID in a straight ferrule is the largest ID that can be drilled or molded into that size of ferrule. For example a 1/16” ferrule with a 1/16” ID is called a straight ferrule and is generally designated with a “SF”. A 1/16” ferrule with an ID smaller than 1/16” is referred to as a reducing ferrule “RF”. For example, a 1/16” RF can have IDs ranging from 0.3mm to 1.2mm.
Determining Ferrule sizes:
Ferrule sizes are first determined by the size of the fitting used. The next determination is the ID of the column. For example a column with a 0.32mm ID would us a ferrule with a 0.5mm ID. In actual practice (the column OD is probably 0.45mm) for 1/16” polyimide ferrules, the ferrule ID is drilled to about 0.46mm in order to facilitate finger tightening the ferrule on the column.
TALU uses its vast machining capabilities to manufacture all of its PTFE ferrules.
All Ferrules up to 1/4" are packaged in TALU’s own ten pocket disk packs for added protection from contamination, damage and accidental spilling.
Graphite ferrules are made from the purest graphite and range from 1/16” short ferrules to 1 1/4” bore diameters.
We machine our own PTFE ferrules.
TL-Polyimide ferrules are available in three different material composites: 100 % Polyimide, 85% Polyimide/15% Graphite (by weight) and 60% Polyimide/40% Graphite (by weight). Our composites are blended using micro-composition by in-situ reaction, resulting in excellent wear properties and high mechanical strength. TL-Polyimide has a continous operating temperature rated at 375 degrees Celcius with excursions in excess of 490 degrees Celcius. All Polyimide ferrules are pre-conditioned.