Projection Welders This is where it all started. Thirty years ago, we made history by developing the first Hermetic Sealing Systems. We are still making history today by offering the best projection welders at the most competitive prices in the industry. Accu-Weld 4100 AC/4200 CD Vacuum Welder Full Details Accu-Weld 5100 AC/5200 CD Single-Station Welder Full Details Accu-Weld 7100 AC/7200 CD Multi-Station Welder Full Details Search for: Our Products: • Projection Welders • Seam Sealers • Spot/Gap Welders • Lid Tackers • Atmosphere Chambers • Vacuum Bake-Out Ovens • Accessory Items • Hermetic Sealing Services