Premix units are used to control and mix the air and fuel gas that is supplied to the torch. Compressed air and gas are delivered to a premix unit through separate pipes. They then travel through separate valves, regulators and jets, which control the pressure and flow rate, before being mixed in a mixer block. The air and gas mixture is then supplied to the torch.

Our base model premix unit is the CA170B, pictured below, which has one valve in the air and gas lines. Other standard designs, including designs for use in potentially explosive atmospheres, are based on the CA170B. The table below lists the various models along with features.

In addition to the above, we have premix units that have a neat gas outlet for use with GT torches, the standard version being the CA182B. A version for use in potentially explosive atmospheres is the CA183B.

For applications that have a low pressure gas supply, the CA174 is available, which does not have a pressure regulator on the gas line.

The following drawings are currently available in acrobat format for downloading.

• CA170B – A1/8511