Cautions:

1. We do not have our original fittings for E-SJ-4.3$\times$6.4 and E-SJ-8$\times$10.
2. In case you have to use your fittings other than our original fittings, please do not use the joints to seal an outer surface of the tubing. This may result in the bursting or coming off from the tubing.
3. When you use our products, please refer to “Precautions for Use.” (“The Precautions for Use” is also available at the product specifications of E-SJ, which can be downloadable from here.)
4. In terms of chemical resistance, please refer to “Chemical Resistance Data.”
5. Although the inner layer is made of ETFE fluorine, please make sure whether or not E-SJ is usable for high purity fluids before you use.
6. Although the inner layer is resistant to fluids, depending on working environments, the fluids would be permeated through the inner layer, resulting in the danger of swelling and degradation of the middle or outer layer.

### Case Study

Problem: A Single-Layer Teflon Tube is hard and easy to break.

A gas analysis equipment manufacturer (called “Company A” hereinafter) was looking for a flexible tubing for better handling and easy installation. An inner layer should be made of fluorine, and its bending radius is smaller and hard to break.

HAKKO Solution:

HAKKO proposed E-SJ: Flexible Fluorine (ETFE) Resin Tubing and provided a sample. E-SJ is made of three layers: the inner layer is made of ETFE fluorine, the middle layer is made of polyamide and the outer layer is made of polyurethane. The inner layer shows a feature of smoothness and higher levels of chemical resistance. Also, the outer layer is made of polyurethane, which makes the tubing softer and more flexible. As a result, compared with a teflon tubing, E-SJ is flexible, hard to break and restore its shape even if it kinks. After Company A evaluates our E-SJ, E-SJ passed the criteria of smoothness, chemical resistance and flexibility.