Question 1

What products are part of Líbel's portfolio?

Accepted Answer

The main products in Líbel's portfolio are oil seals. In addition, we work with u-packs , wiper seals, scrapers, V-rings, bonded seals, circle lips, speed sleeves, O-rings and O-ring kits. If you want to know more about our products, click here.(/old-produtos)

Question 2

What lines does Líbel work with?

Accepted Answer

We mainly work with the sale of Nak brand products, but from 2019 on, we expanded our portfolio, starting to sell products from other brands such as NQK.

Question 3

What is the relationship between each line and group of products?

Accepted Answer

Industrial Line: Standard seal, oring, v ring, axial face, seal for electric tools, seals for  gear box reducers, seal for washing machines, wind turbine seal and seal for pumps.
Automotive Line: Seals for transmission, power steering, suspension, shock absorber and engine systems.
Agricultural Line: Oil seal for heavy line and AP type.
Construction Line: Oil seal and v ring.
Mining Line: Oil seal for heavy line and speed sleeve
Hydraulic and Pneumatic Line: U pack and wiper seal

Question 4

Which brands does Líbel work with?

Accepted Answer

We mainly work with the sale of Nak brand products, but as of 2019, we expanded our portfolio, starting to sell products from other brands such as Arca, NQK, Freudenberg, Selotech, among others.

Question 5

What factors influence the correct choice of my product?

Accepted Answer

Factors that directly influence the purchase include:
1. Application – Where will your part be inserted? Each application requires a different type of sealing.
2. Measurements – The dimensions of the part, such as external diameter, internal diameter and height of the product, must be compatible with the size of the housing (where the part will be inserted).
3. Temperature – The seal will be subjected to a temperature that will directly influence the choice of material.
4. Pressure – It is important to specify the maximum pressure to which the seal will be subjected. Considering that it is not ideal for the seal to operate at its limit, as this could cause damage to the system.
5. Static/dynamic movement – Analysis of what type of movement the seal will have to withstand.
6. Medium/Fluid – It is important to check in which medium your seal will be applied (water, air, gas, among others), as the influence of these different media and fluids will also directly affect the choice of your seal.

Question 6

How do I identify the Sabó profile that matches my oil seal?

Accepted Answer

To identify the equivalence between Nak and Sabó, consult our conversion table.(https://www.libelvedacao.com.br/_files/ugd/5a7401_c728f933e9924c039909c3b28e44ee73.pdf) This same table will show the conversion of Nak profiles to profiles from the brands Freudenberg, Vedabrás and Save.

Question 7

What is the maximum temperature supported by my Industrial Seal?

Accepted Answer

The most common rubber materials among industrial seals are: Nitrile (NBR), Viton (FKM), Hydrogenated (HNBR) and Acrylic (ACM). Each material supports a specific temperature (see table below):

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Question 8

What is the difference between seals with and without dust guards?

Accepted Answer

Seals with dust lips have a lip that protects the application against dust and prevents the entry of these contaminants. An example of a seal with a dust guard is the TC type.
Seals without a dust lip do not have a lip to retain dust or powder, and are suitable for applications in which there will be no contact with these external contaminants. An example of a seal that does not have a dust lip is the SC type.

Question 9

What does it mean for “shielded“ oil seal?

Accepted Answer

Shielding means that the seal has a metallic composition in its material, suitable for heavy-duty vehicles, with applications for tractors, cranes, among others.

Question 10

What are the differences amongst the profiles of shielded oil seals?

Accepted Answer

We work with fully shielded (completely metal composition) and semi-shielded (made of metal and rubber) seal profiles. Both have the same sealing function, protecting against external contaminants. The difference lies in the application, in which some parts require a fully shielded item, and others require a semi-shielded item.
An example of fully shielded seals are the TA (with dust lip) and SA (without dust lip). Semi-shielded seals are the TB (with dust lip) and SB (without dust lip).

Question 11

What is the meaning of the nomenclature of Nak products?

Accepted Answer

The nomenclature of Nak products is defined by a code similar to:
TC 25*40*7 VN801/C/C//
This varied sequence of letters and numbers has the following meaning:

TC - Product profile
25*40*7 – These are the dimensions of the part, that is, external diameter x internal diameter x height.
V - Letter that refers to the material, Viton.
N - Color, specified in English, where N refers to the color Brown.
80 - Refers to the hardness of the product, in this case, Shore 80.
C/C// - Carbon Steel Spring

Question 12

How do I identify the material codes, color and hardness of Nak products?

Accepted Answer

The material types, colors, and hardness levels follow the codes in the table below:
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Question 13

How do I choose between  stainless steel  spring and a carbon steel spring?

Accepted Answer

Our stainless steel springs are designed for greater durability against water and abrasive liquids. Carbon steel springs, on the other hand, are recommended for standard applications where there will be no exposure to water or corrosive fluids.

Question 14

If I need an oil seal that is not in the catalog, what should I do?

Accepted Answer

Contact our sales team to see if we can add your item to our product range. We can customize a new item to suit your needs, or recommend a partner brand that already has the specifications you need.

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