Mathey Dearman Double Seal Purge System 64 72mm DS64 72 Mobile Extraction Units Parameter Value Model SKU Traditional FR Cloth Jackets Parameter Value Model SKU STT 10 Bench Model K1560 2 Configuration Bench model — permanent installation Process Control STT II — microprocessor based background and peak current control Peak Current Control Presettable — optimizes starting performance Background Current Control Presettable — controls heat input during sustaining arc phase Drive Rolls Split wire guide + 4 roll drive for positive feeding Trigger Operation 4 step trigger — cruise control for long welds and hard automation Range Control Yes — keeps procedures in the "sweet spot" for STT arc stability Dual Procedure Control Yes — increase or decrease arc energy without changing wire feed speed Mounting Options Modular design for multiple mounting configurations Compatible Power Sources Lincoln STT II power source edge corner butt joints These systems use high temperature silicone disks to form an airtight seal All B&B purge systems are designed to save the pipe fabricator time and money