-Welded body joint. Factory tested to ensure positive, leak-free performance. Forged brass body construction with extended copper fittings and optional access fittings. -Full size ports for unrestricted flow on most sizes 1/4" (6 mm) through 2-1/8" (54 mm).- -Dual Teflon seals surround the polished, brass ball to prevent leakage. Stem seal and stem washer provide the primary stem seal. Bottom load stem for safety. -Stainless steel stop plate ensures fully open to fully closed with a 1/4 turn. -Ball internal relief port design ensures positive shut-off in either flow direction, even during system evacuation. -All EBV(T) ball valves are bi-directional and may be installed in any position