Fully Welded Body Ball Valves

• —Flexible seal ring seat with a preloaded spring adapts to pressure and temperature variation for zero-leakage sealing
• —Fully welded, integral body eliminates external leakage paths
• —Fire-resistant construction, with flexible graphite or stainless-steel/graphite packing at every leakage point
• —Advanced support plate design on large diameters extends service life and reduces operating torque
• —Suitable for direct burial — no large valve pit required, reducing construction cost and time
• —Full bore for pigging, with low flow resistance and high flow capacity
• —Ball fully encloses the seat when open, shielding it and the packing from impurities in the medium

High-Pressure Pneumatic Shell Test

For all cast steel gate, globe, and check valves, as well as cast trunnion and floating ball valves, RANGER-FZV submerges the completed, uncoated valve in water and pressure tests the casting with nitrogen or compressed air. Pinholes or casting deficits invisible to a standard hydrotest are revealed as bubbles in the water — castings have failed this test after passing hydrotest.