The combination of properties makes PU the most widely used tubing in pneumatics. The properties of PU are determined by its base material. The most common variant is made of polyester (although polyether is also frequently used).
The SL.PU is a polyurethane ether-based tube. It is suitable for use as pneumatic tubing and for the transport of water. The SL.PU can be used at temperatures from -40 °C to +60 °C, with allowable working pressures decreasing as the temperature rises (see table).
The tube is hydrolysis-resistant and has excellent UV resistance, making outdoor use possible—unlike the SL.U. The SL.PU is standard available in three colours (blue, black, transparent) in 100-metre rolls.
Other colours/sizes/roll lengths are available on request. The tube is also available in a heat-bonded DUO version (black/blue).
The SL.U is a polyurethane (polyester-based) pneumatic tube.
It is a flexible tube, especially suitable for use at low temperatures. The tube is intended for general pneumatic applications using dry compressed air. It is kink-resistant and can be installed with a small bending radius. It can be used from -40 °C to +80 °C, with allowable working pressures decreasing at higher temperatures. The tube has limited chemical resistance and is not hydrolysis-resistant, but it is resistant to oil and grease.

Different materials