API 6A Gate Valves

• —Full bore design reduces pressure drop and eddy erosion from solid particles in the flow
• —Balanced tail rod lowers valve operating torque
• —Hydraulic piston operation standard, with manual emergency shut-off
• —Metal-to-metal seal between cover/body and plate/seat
• —Supersonic spray carbide-coated valve plate with a hard-alloy seat ring for wear and corrosion resistance
• —Inverted stem sealing structure allows stem packing replacement under pressure
• —Grease injection valve on the cover to replenish seat and plate sealing and lubrication

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.