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

The body of the welding torch typically contains two needle valves. These valves are crucial for controlling the flow of gases essential for the brazing process. One needle valve is designated for the acetylene or fuel gas, while the other is for oxygen. This dual control allows the operator to adjust the mixture of gases precisely, ensuring an effective and efficient flame for the specific requirements of brazing.

Maintaining the correct gas flow is vital for achieving the right temperature and flame characteristics necessary for effective brazing. Having two separate valves enables finer control and adaptation to varying conditions, which is critical for successful results in welding and brazing applications.