1. Due to the laminated structure tubing, please use the joints to seal an inner surface of the tubing.
  2. 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-SJV, 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-SJV 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.

An analytical instrument 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. Company A is also concerned about the chemical resistance of polyurethane resin (outer layer) against the gases that fill the equipment inside.

HAKKO Solution:

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