Swagelok Co. is introducing two options to improve weld quality and consistency for operators using its M200 power supply. The new automatic inside diameter (ID) purge control system changes purge flow to maintain proper ID pressure at the weld joint. Welders who prefer the flexibility of manual welding, but with the consistency of orbital welding, will appreciate a new manual mode and hand-torch accessory.

Swagelok develops fluid system solutions, including products, assemblies, and services for the research, instrumentation, pharmaceutical, oil and gas, power, petrochemical, alternative fuels, and semiconductor industries.

The Swagelok welding system M200 power supply offers precision and control combined with easy-to-use touch-screen operation for orbital welding. According to John Glessman, Swagelok product manager, the new offerings are designed to enhance output consistency for “a more streamlined experience” and to give welders an ability to produce more welds per day.

Automatic ID purge control
The patent-pending Swagelok® ID purge control changes purge flow dynamically to maintain proper ID pressure at the weld joint. In combination with the M200’s automatic control for outside diameter (OD) shield gas, the result is a complete, automated system for purge control and consistent weld process and weld quality.

“In general, ID purge control is a large variable in orbital welding,” Glessman explained. “Some applications require constant manual adjustment of ID purge throughout the welding process. This takes a certain amount of skill and if not done properly may cause significant rework due to poor weld quality.”

Automatic ID purge control helps eliminate these undesirable welds, which is critical for industries with high-purity requirements such as semiconductor and biopharmaceutical.

The ID purge settings are established either through automatic weld procedure generation or simple key entry. A highly responsive mass flow controller (MFC) inside the M200 and an external pressure sensor provide more accurate and consistent purge gas control than manual processes. Real-time monitoring of all purge operations is recorded in the M200 weld log detail.

The automatic ID purge control option is available with initial M200 power supply orders or can be integrated into an existing machine at Swagelok’s equipment service centers worldwide. Installation includes a software upgrade, MFC for the ID purge gas supply, and an external component kit.

Manual mode and hand torch
To increase welding flexibility, Swagelok is introducing a manual mode to its standard orbital functionality, so manual TIG welding with can be as consistent as orbital welding. When the hand-torch accessory is plugged into the power supply, all weld output and adjustments are graphically displayed. Manual weld controls are brought up on the high-resolution, 12.1 in. (30.7 cm) color industrial touch-screen. The power supply features a built-in MFC that automatically sets the flow rate for shield gas. Any adjustments made by the operator display on screen.

This manual mode is designed for applications in industrial segments like oil and gas, semiconductor, and biopharmaceutical, among others. While the upgrade will be standard for all new power supplies, equipment already in use may be updated by a Swagelok weld specialist. Customers should contact a Swagelok sales and service center for details.

The hand torch accessory kit includes one torch, cabling, clamp, and 10 electrodes. It is offered through Swagelok sales/service centers, too. The gas-cooled, 125-amp capacity torch features a brass head, fail-safe hose fittings, and silicon rubber insulation.