The body of the welding torch contains how many needle valves?

The body of a welding torch typically contains two needle valves. These valves are essential because they control the flow of both fuel gas and oxygen, allowing the welder to achieve the proper flame for brazing or welding applications. Having two separate valves allows for precise adjustments of gas mixtures, which is crucial for attaining the desired temperature and flame characteristics for effective brazing.

This design contributes to the flexibility and effectiveness of the torch, making it easier for operators to fine-tune their process based on the specific materials and techniques being used. By managing the flow of both gases independently, a welder can create a neutral flame, reducing the risk of oxidation and ensuring better bonding of the materials being worked on.